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+--------+-------------------------+-------------------------+--------+--------+
|00000000| 00 08 52 45 4e 44 45 52 | 2e 43 00 00 00 00 00 00 |..RENDER|.C......|
|00000010| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00000020| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00000030| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00000040| 00 54 45 58 54 4d 50 53 | 20 01 00 00 00 00 00 00 |.TEXTMPS| .......|
|00000050| 00 00 00 00 00 3b 38 00 | 00 01 ac a9 50 dc ba a9 |.....;8.|....P...|
|00000060| 50 dc ba 00 00 08 00 00 | 00 00 00 00 00 00 00 00 |P.......|........|
|00000070| 00 00 00 00 00 00 00 00 | 00 00 81 81 81 1d 00 00 |........|........|
|00000080| 2f 2a 2a 2a 2a 2a 2a 2a | 2a 2a 2a 2a 2a 2a 2a 2a |/*******|********|
|00000090| 2a 2a 2a 2a 2a 2a 2a 2a | 2a 2a 2a 2a 2a 2a 2a 2a |********|********|
|000000a0| 2a 2a 2a 2a 2a 2a 2a 2a | 2a 2a 2a 2a 2a 2a 2a 2a |********|********|
|000000b0| 2a 2a 2a 2a 2a 2a 2a 2a | 2a 2a 2a 2a 2a 2a 2a 2a |********|********|
|000000c0| 2a 2a 2a 2a 2a 2a 2a 2a | 2a 2a 2a 2a 2a 0d 2a 20 |********|*****.* |
|000000d0| 20 20 20 20 20 20 20 20 | 20 20 20 20 20 20 20 20 |        |        |
|000000e0| 20 20 72 65 6e 64 65 72 | 2e 63 0d 2a 0d 2a 20 20 |  render|.c.*.*  |
|000000f0| 54 68 69 73 20 6d 6f 64 | 75 6c 65 20 69 6d 70 6c |This mod|ule impl|
|00000100| 65 6d 65 6e 74 73 20 74 | 68 65 20 6d 61 69 6e 20 |ements t|he main |
|00000110| 72 61 79 74 72 61 63 69 | 6e 67 20 6c 6f 6f 70 2e |raytraci|ng loop.|
|00000120| 0d 2a 0d 2a 20 30 38 2f | 30 37 2f 39 32 20 6c 73 |.*.* 08/|07/92 ls|
|00000130| 6b 20 20 20 20 43 68 61 | 6e 67 65 64 20 74 68 65 |k    Cha|nged the|
|00000140| 20 6e 6f 72 6d 61 6c 20 | 61 6e 74 69 61 6c 69 61 | normal |antialia|
|00000150| 73 69 6e 67 20 66 75 6e | 63 74 69 6f 6e 20 74 6f |sing fun|ction to|
|00000160| 20 75 73 65 20 61 20 6c | 6f 6f 70 20 0d 2a 20 20 | use a l|oop .*  |
|00000170| 20 20 20 20 20 20 20 20 | 20 20 20 20 20 20 20 77 |        |       w|
|00000180| 68 65 72 65 20 74 68 65 | 20 6e 75 6d 62 65 72 20 |here the| number |
|00000190| 6f 66 20 72 61 79 73 20 | 70 65 72 20 70 69 78 65 |of rays |per pixe|
|000001a0| 6c 20 77 68 65 6e 20 61 | 6e 74 69 61 6c 69 61 73 |l when a|ntialias|
|000001b0| 69 6e 67 20 63 61 6e 20 | 0d 2a 20 20 20 20 20 20 |ing can |.*      |
|000001c0| 20 20 20 20 20 20 20 20 | 20 20 20 62 65 20 73 65 |        |   be se|
|000001d0| 70 63 69 66 69 65 64 2e | 0d 2a 0d 2a 20 20 66 72 |pcified.|.*.*  fr|
|000001e0| 6f 6d 20 50 65 72 73 69 | 73 74 65 6e 63 65 20 6f |om Persi|stence o|
|000001f0| 66 20 56 69 73 69 6f 6e | 20 52 61 79 74 72 61 63 |f Vision| Raytrac|
|00000200| 65 72 0d 2a 20 20 43 6f | 70 79 72 69 67 68 74 20 |er.*  Co|pyright |
|00000210| 31 39 39 33 20 50 65 72 | 73 69 73 74 65 6e 63 65 |1993 Per|sistence|
|00000220| 20 6f 66 20 56 69 73 69 | 6f 6e 20 54 65 61 6d 0d | of Visi|on Team.|
|00000230| 2a 2d 2d 2d 2d 2d 2d 2d | 2d 2d 2d 2d 2d 2d 2d 2d |*-------|--------|
|00000240| 2d 2d 2d 2d 2d 2d 2d 2d | 2d 2d 2d 2d 2d 2d 2d 2d |--------|--------|
|00000250| 2d 2d 2d 2d 2d 2d 2d 2d | 2d 2d 2d 2d 2d 2d 2d 2d |--------|--------|
|00000260| 2d 2d 2d 2d 2d 2d 2d 2d | 2d 2d 2d 2d 2d 2d 2d 2d |--------|--------|
|00000270| 2d 2d 2d 2d 2d 2d 2d 2d | 2d 2d 2d 2d 0d 2a 20 20 |--------|----.*  |
|00000280| 4e 4f 54 49 43 45 3a 20 | 54 68 69 73 20 73 6f 75 |NOTICE: |This sou|
|00000290| 72 63 65 20 63 6f 64 65 | 20 66 69 6c 65 20 69 73 |rce code| file is|
|000002a0| 20 70 72 6f 76 69 64 65 | 64 20 73 6f 20 74 68 61 | provide|d so tha|
|000002b0| 74 20 75 73 65 72 73 20 | 6d 61 79 20 65 78 70 65 |t users |may expe|
|000002c0| 72 69 6d 65 6e 74 0d 2a | 20 20 77 69 74 68 20 65 |riment.*|  with e|
|000002d0| 6e 68 61 6e 63 65 6d 65 | 6e 74 73 20 74 6f 20 50 |nhanceme|nts to P|
|000002e0| 4f 56 2d 52 61 79 20 61 | 6e 64 20 74 6f 20 70 6f |OV-Ray a|nd to po|
|000002f0| 72 74 20 74 68 65 20 73 | 6f 66 74 77 61 72 65 20 |rt the s|oftware |
|00000300| 74 6f 20 70 6c 61 74 66 | 6f 72 6d 73 20 6f 74 68 |to platf|orms oth|
|00000310| 65 72 0d 2a 20 20 74 68 | 61 6e 20 74 68 6f 73 65 |er.*  th|an those|
|00000320| 20 73 75 70 70 6f 72 74 | 65 64 20 62 79 20 74 68 | support|ed by th|
|00000330| 65 20 50 4f 56 2d 52 61 | 79 20 54 65 61 6d 2e 20 |e POV-Ra|y Team. |
|00000340| 20 54 68 65 72 65 20 61 | 72 65 20 73 74 72 69 63 | There a|re stric|
|00000350| 74 20 72 75 6c 65 73 20 | 75 6e 64 65 72 0d 2a 20 |t rules |under.* |
|00000360| 20 77 68 69 63 68 20 79 | 6f 75 20 61 72 65 20 70 | which y|ou are p|
|00000370| 65 72 6d 69 74 74 65 64 | 20 74 6f 20 75 73 65 20 |ermitted| to use |
|00000380| 74 68 69 73 20 66 69 6c | 65 2e 20 20 54 68 65 20 |this fil|e.  The |
|00000390| 72 75 6c 65 73 20 61 72 | 65 20 69 6e 20 74 68 65 |rules ar|e in the|
|000003a0| 20 66 69 6c 65 0d 2a 20 | 20 6e 61 6d 65 64 20 50 | file.* | named P|
|000003b0| 4f 56 4c 45 47 41 4c 2e | 44 4f 43 20 77 68 69 63 |OVLEGAL.|DOC whic|
|000003c0| 68 20 73 68 6f 75 6c 64 | 20 62 65 20 64 69 73 74 |h should| be dist|
|000003d0| 72 69 62 75 74 65 64 20 | 77 69 74 68 20 74 68 69 |ributed |with thi|
|000003e0| 73 20 66 69 6c 65 2e 20 | 49 66 0d 2a 20 20 50 4f |s file. |If.*  PO|
|000003f0| 56 4c 45 47 41 4c 2e 44 | 4f 43 20 69 73 20 6e 6f |VLEGAL.D|OC is no|
|00000400| 74 20 61 76 61 69 6c 61 | 62 6c 65 20 6f 72 20 66 |t availa|ble or f|
|00000410| 6f 72 20 6d 6f 72 65 20 | 69 6e 66 6f 20 70 6c 65 |or more |info ple|
|00000420| 61 73 65 20 63 6f 6e 74 | 61 63 74 20 74 68 65 20 |ase cont|act the |
|00000430| 50 4f 56 2d 52 61 79 0d | 2a 20 20 54 65 61 6d 20 |POV-Ray.|*  Team |
|00000440| 43 6f 6f 72 64 69 6e 61 | 74 6f 72 20 62 79 20 6c |Coordina|tor by l|
|00000450| 65 61 76 69 6e 67 20 61 | 20 6d 65 73 73 61 67 65 |eaving a| message|
|00000460| 20 69 6e 20 43 6f 6d 70 | 75 53 65 72 76 65 27 73 | in Comp|uServe's|
|00000470| 20 47 72 61 70 68 69 63 | 73 20 44 65 76 65 6c 6f | Graphic|s Develo|
|00000480| 70 65 72 27 73 0d 2a 20 | 20 46 6f 72 75 6d 2e 20 |per's.* | Forum. |
|00000490| 20 54 68 65 20 6c 61 74 | 65 73 74 20 76 65 72 73 | The lat|est vers|
|000004a0| 69 6f 6e 20 6f 66 20 50 | 4f 56 2d 52 61 79 20 6d |ion of P|OV-Ray m|
|000004b0| 61 79 20 62 65 20 66 6f | 75 6e 64 20 74 68 65 72 |ay be fo|und ther|
|000004c0| 65 20 61 73 20 77 65 6c | 6c 2e 0d 2a 0d 2a 20 54 |e as wel|l..*.* T|
|000004d0| 68 69 73 20 70 72 6f 67 | 72 61 6d 20 69 73 20 62 |his prog|ram is b|
|000004e0| 61 73 65 64 20 6f 6e 20 | 74 68 65 20 70 6f 70 75 |ased on |the popu|
|000004f0| 6c 61 72 20 44 4b 42 20 | 72 61 79 74 72 61 63 65 |lar DKB |raytrace|
|00000500| 72 20 76 65 72 73 69 6f | 6e 20 32 2e 31 32 2e 0d |r versio|n 2.12..|
|00000510| 2a 20 44 4b 42 54 72 61 | 63 65 20 77 61 73 20 6f |* DKBTra|ce was o|
|00000520| 72 69 67 69 6e 61 6c 6c | 79 20 77 72 69 74 74 65 |riginall|y writte|
|00000530| 6e 20 62 79 20 44 61 76 | 69 64 20 4b 2e 20 42 75 |n by Dav|id K. Bu|
|00000540| 63 6b 2e 0d 2a 20 44 4b | 42 54 72 61 63 65 20 56 |ck..* DK|BTrace V|
|00000550| 65 72 20 32 2e 30 2d 32 | 2e 31 32 20 77 65 72 65 |er 2.0-2|.12 were|
|00000560| 20 77 72 69 74 74 65 6e | 20 62 79 20 44 61 76 69 | written| by Davi|
|00000570| 64 20 4b 2e 20 42 75 63 | 6b 20 26 20 41 61 72 6f |d K. Buc|k & Aaro|
|00000580| 6e 20 41 2e 20 43 6f 6c | 6c 69 6e 73 2e 0d 2a 0d |n A. Col|lins..*.|
|00000590| 2a 2a 2a 2a 2a 2a 2a 2a | 2a 2a 2a 2a 2a 2a 2a 2a |********|********|
|000005a0| 2a 2a 2a 2a 2a 2a 2a 2a | 2a 2a 2a 2a 2a 2a 2a 2a |********|********|
|000005b0| 2a 2a 2a 2a 2a 2a 2a 2a | 2a 2a 2a 2a 2a 2a 2a 2a |********|********|
|000005c0| 2a 2a 2a 2a 2a 2a 2a 2a | 2a 2a 2a 2a 2a 2a 2a 2a |********|********|
|000005d0| 2a 2a 2a 2a 2a 2a 2a 2a | 2a 2a 2a 2a 2a 2a 2f 0d |********|******/.|
|000005e0| 0d 23 69 6e 63 6c 75 64 | 65 20 22 66 72 61 6d 65 |.#includ|e "frame|
|000005f0| 2e 68 22 0d 23 69 6e 63 | 6c 75 64 65 20 22 76 65 |.h".#inc|lude "ve|
|00000600| 63 74 6f 72 2e 68 22 0d | 23 69 6e 63 6c 75 64 65 |ctor.h".|#include|
|00000610| 20 22 70 6f 76 70 72 6f | 74 6f 2e 68 22 0d 0d 65 | "povpro|to.h"..e|
|00000620| 78 74 65 72 6e 20 46 49 | 4c 45 5f 48 41 4e 44 4c |xtern FI|LE_HANDL|
|00000630| 45 20 2a 4f 75 74 70 75 | 74 5f 46 69 6c 65 5f 48 |E *Outpu|t_File_H|
|00000640| 61 6e 64 6c 65 3b 0d 65 | 78 74 65 72 6e 20 63 68 |andle;.e|xtern ch|
|00000650| 61 72 20 4f 75 74 70 75 | 74 5f 46 69 6c 65 5f 4e |ar Outpu|t_File_N|
|00000660| 61 6d 65 5b 46 49 4c 45 | 5f 4e 41 4d 45 5f 4c 45 |ame[FILE|_NAME_LE|
|00000670| 4e 47 54 48 5d 3b 0d 65 | 78 74 65 72 6e 20 63 68 |NGTH];.e|xtern ch|
|00000680| 61 72 20 49 6e 70 75 74 | 5f 46 69 6c 65 5f 4e 61 |ar Input|_File_Na|
|00000690| 6d 65 5b 46 49 4c 45 5f | 4e 41 4d 45 5f 4c 45 4e |me[FILE_|NAME_LEN|
|000006a0| 47 54 48 5d 3b 0d 65 78 | 74 65 72 6e 20 63 68 61 |GTH];.ex|tern cha|
|000006b0| 72 20 53 74 61 74 5f 46 | 69 6c 65 5f 4e 61 6d 65 |r Stat_F|ile_Name|
|000006c0| 5b 46 49 4c 45 5f 4e 41 | 4d 45 5f 4c 45 4e 47 54 |[FILE_NA|ME_LENGT|
|000006d0| 48 5d 3b 0d 65 78 74 65 | 72 6e 20 63 68 61 72 20 |H];.exte|rn char |
|000006e0| 4f 75 74 70 75 74 46 6f | 72 6d 61 74 2c 20 43 6f |OutputFo|rmat, Co|
|000006f0| 6c 6f 72 5f 42 69 74 73 | 2c 20 50 61 6c 65 74 74 |lor_Bits|, Palett|
|00000700| 65 4f 70 74 69 6f 6e 3b | 0d 65 78 74 65 72 6e 20 |eOption;|.extern |
|00000710| 63 68 61 72 20 56 65 72 | 62 6f 73 65 46 6f 72 6d |char Ver|boseForm|
|00000720| 61 74 3b 0d 65 78 74 65 | 72 6e 20 75 6e 73 69 67 |at;.exte|rn unsig|
|00000730| 6e 65 64 20 69 6e 74 20 | 4f 70 74 69 6f 6e 73 3b |ned int |Options;|
|00000740| 0d 65 78 74 65 72 6e 20 | 69 6e 74 20 46 69 6c 65 |.extern |int File|
|00000750| 5f 42 75 66 66 65 72 5f | 53 69 7a 65 3b 0d 65 78 |_Buffer_|Size;.ex|
|00000760| 74 65 72 6e 20 69 6e 74 | 20 55 73 65 5f 53 6c 61 |tern int| Use_Sla|
|00000770| 62 73 3b 0d 76 6f 6c 61 | 74 69 6c 65 20 69 6e 74 |bs;.vola|tile int|
|00000780| 20 53 74 6f 70 5f 46 6c | 61 67 3b 0d 65 78 74 65 | Stop_Fl|ag;.exte|
|00000790| 72 6e 20 69 6e 74 20 46 | 69 72 73 74 5f 4c 69 6e |rn int F|irst_Lin|
|000007a0| 65 2c 20 4c 61 73 74 5f | 4c 69 6e 65 3b 0d 65 78 |e, Last_|Line;.ex|
|000007b0| 74 65 72 6e 20 69 6e 74 | 20 46 69 72 73 74 5f 43 |tern int| First_C|
|000007c0| 6f 6c 75 6d 6e 2c 20 4c | 61 73 74 5f 43 6f 6c 75 |olumn, L|ast_Colu|
|000007d0| 6d 6e 3b 0d 65 78 74 65 | 72 6e 20 6c 6f 6e 67 20 |mn;.exte|rn long |
|000007e0| 4e 75 6d 62 65 72 5f 4f | 66 5f 50 69 78 65 6c 73 |Number_O|f_Pixels|
|000007f0| 2c 20 4e 75 6d 62 65 72 | 5f 4f 66 5f 52 61 79 73 |, Number|_Of_Rays|
|00000800| 2c 20 4e 75 6d 62 65 72 | 5f 4f 66 5f 50 69 78 65 |, Number|_Of_Pixe|
|00000810| 6c 73 5f 53 75 70 65 72 | 73 61 6d 70 6c 65 64 3b |ls_Super|sampled;|
|00000820| 0d 65 78 74 65 72 6e 20 | 73 68 6f 72 74 20 2a 68 |.extern |short *h|
|00000830| 61 73 68 54 61 62 6c 65 | 3b 0d 65 78 74 65 72 6e |ashTable|;.extern|
|00000840| 20 75 6e 73 69 67 6e 65 | 64 20 73 68 6f 72 74 20 | unsigne|d short |
|00000850| 63 72 63 74 61 62 5b 32 | 35 36 5d 3b 0d 65 78 74 |crctab[2|56];.ext|
|00000860| 65 72 6e 20 4f 42 4a 45 | 43 54 20 2a 52 6f 6f 74 |ern OBJE|CT *Root|
|00000870| 5f 4f 62 6a 65 63 74 3b | 0d 65 78 74 65 72 6e 20 |_Object;|.extern |
|00000880| 6c 6f 6e 67 20 41 6e 74 | 69 61 6c 69 61 73 44 65 |long Ant|ialiasDe|
|00000890| 70 74 68 3b 0d 65 78 74 | 65 72 6e 20 44 42 4c 20 |pth;.ext|ern DBL |
|000008a0| 4a 69 74 74 65 72 53 63 | 61 6c 65 3b 0d 0d 23 64 |JitterSc|ale;..#d|
|000008b0| 65 66 69 6e 65 20 72 61 | 6e 64 33 64 28 61 2c 62 |efine ra|nd3d(a,b|
|000008c0| 29 20 63 72 63 74 61 62 | 5b 28 69 6e 74 29 28 68 |) crctab|[(int)(h|
|000008d0| 61 73 68 54 61 62 6c 65 | 5b 28 69 6e 74 29 28 68 |ashTable|[(int)(h|
|000008e0| 61 73 68 54 61 62 6c 65 | 5b 28 69 6e 74 29 28 28 |ashTable|[(int)((|
|000008f0| 61 29 26 30 78 66 66 66 | 29 5d 5e 28 62 29 29 26 |a)&0xfff|)]^(b))&|
|00000900| 30 78 66 66 66 5d 29 26 | 30 78 66 66 5d 0d 0d 46 |0xfff])&|0xff]..F|
|00000910| 52 41 4d 45 20 46 72 61 | 6d 65 3b 0d 52 41 59 20 |RAME Fra|me;.RAY |
|00000920| 2a 43 4d 5f 52 61 79 3b | 0d 69 6e 74 20 54 72 61 |*CM_Ray;|.int Tra|
|00000930| 63 65 5f 4c 65 76 65 6c | 2c 20 53 75 70 65 72 53 |ce_Level|, SuperS|
|00000940| 61 6d 70 6c 65 43 6f 75 | 6e 74 3b 0d 0d 44 42 4c |ampleCou|nt;..DBL|
|00000950| 20 4d 61 78 5f 54 72 61 | 63 65 5f 4c 65 76 65 6c | Max_Tra|ce_Level|
|00000960| 20 3d 20 35 3b 0d 44 42 | 4c 20 6d 61 78 63 6c 72 | = 5;.DB|L maxclr|
|00000970| 3b 0d 0d 73 74 61 74 69 | 63 20 76 6f 69 64 20 63 |;..stati|c void c|
|00000980| 68 65 63 6b 5f 73 74 61 | 74 73 20 50 41 52 41 4d |heck_sta|ts PARAM|
|00000990| 53 28 28 69 6e 74 20 79 | 29 29 3b 0d 73 74 61 74 |S((int y|));.stat|
|000009a0| 69 63 20 76 6f 69 64 20 | 64 6f 5f 61 6e 74 69 5f |ic void |do_anti_|
|000009b0| 61 6c 69 61 73 69 6e 67 | 20 50 41 52 41 4d 53 28 |aliasing| PARAMS(|
|000009c0| 28 69 6e 74 20 78 2c 20 | 69 6e 74 20 79 2c 20 43 |(int x, |int y, C|
|000009d0| 4f 4c 4f 55 52 20 2a 43 | 6f 6c 6f 75 72 29 29 3b |OLOUR *C|olour));|
|000009e0| 0d 73 74 61 74 69 63 20 | 76 6f 69 64 20 6f 75 74 |.static |void out|
|000009f0| 70 75 74 5f 6c 69 6e 65 | 20 50 41 52 41 4d 53 28 |put_line| PARAMS(|
|00000a00| 28 69 6e 74 20 79 29 29 | 3b 0d 0d 43 4f 4c 4f 55 |(int y))|;..COLOU|
|00000a10| 52 20 2a 50 72 65 76 69 | 6f 75 73 5f 4c 69 6e 65 |R *Previ|ous_Line|
|00000a20| 2c 20 2a 43 75 72 72 65 | 6e 74 5f 4c 69 6e 65 3b |, *Curre|nt_Line;|
|00000a30| 0d 0d 63 68 61 72 20 2a | 50 72 65 76 69 6f 75 73 |..char *|Previous|
|00000a40| 5f 4c 69 6e 65 5f 41 6e | 74 69 61 6c 69 61 73 65 |_Line_An|tialiase|
|00000a50| 64 5f 46 6c 61 67 73 2c | 20 2a 43 75 72 72 65 6e |d_Flags,| *Curren|
|00000a60| 74 5f 4c 69 6e 65 5f 41 | 6e 74 69 61 6c 69 61 73 |t_Line_A|ntialias|
|00000a70| 65 64 5f 46 6c 61 67 73 | 3b 0d 52 41 59 20 52 61 |ed_Flags|;.RAY Ra|
|00000a80| 79 3b 0d 0d 76 6f 69 64 | 20 43 72 65 61 74 65 5f |y;..void| Create_|
|00000a90| 52 61 79 20 28 72 61 79 | 2c 20 77 69 64 74 68 2c |Ray (ray|, width,|
|00000aa0| 20 68 65 69 67 68 74 2c | 20 78 2c 20 79 29 0d 52 | height,| x, y).R|
|00000ab0| 41 59 20 2a 72 61 79 3b | 0d 69 6e 74 20 77 69 64 |AY *ray;|.int wid|
|00000ac0| 74 68 2c 20 68 65 69 67 | 68 74 3b 0d 44 42 4c 20 |th, heig|ht;.DBL |
|00000ad0| 78 2c 20 79 3b 0d 20 20 | 7b 0d 20 20 72 65 67 69 |x, y;.  |{.  regi|
|00000ae0| 73 74 65 72 20 44 42 4c | 20 58 5f 53 63 61 6c 61 |ster DBL| X_Scala|
|00000af0| 72 2c 20 59 5f 53 63 61 | 6c 61 72 3b 0d 20 20 56 |r, Y_Sca|lar;.  V|
|00000b00| 45 43 54 4f 52 20 54 65 | 6d 70 5f 56 65 63 74 5f |ECTOR Te|mp_Vect_|
|00000b10| 31 2c 20 54 65 6d 70 5f | 56 65 63 74 5f 32 3b 0d |1, Temp_|Vect_2;.|
|00000b20| 0d 20 20 2f 2a 20 43 6f | 6e 76 65 72 74 20 74 68 |.  /* Co|nvert th|
|00000b30| 65 20 58 20 43 6f 6f 72 | 64 69 6e 61 74 65 20 74 |e X Coor|dinate t|
|00000b40| 6f 20 62 65 20 61 20 44 | 42 4c 20 66 72 6f 6d 20 |o be a D|BL from |
|00000b50| 30 2e 30 20 74 6f 20 31 | 2e 30 20 2a 2f 0d 20 20 |0.0 to 1|.0 */.  |
|00000b60| 58 5f 53 63 61 6c 61 72 | 20 3d 20 28 78 20 2d 20 |X_Scalar| = (x - |
|00000b70| 28 44 42 4c 29 20 77 69 | 64 74 68 20 2f 20 32 2e |(DBL) wi|dth / 2.|
|00000b80| 30 29 20 2f 20 28 44 42 | 4c 29 20 77 69 64 74 68 |0) / (DB|L) width|
|00000b90| 3b 0d 0d 20 20 2f 2a 20 | 43 6f 6e 76 65 72 74 20 |;..  /* |Convert |
|00000ba0| 74 68 65 20 59 20 43 6f | 6f 72 64 69 6e 61 74 65 |the Y Co|ordinate|
|00000bb0| 20 74 6f 20 62 65 20 61 | 20 44 42 4c 20 66 72 6f | to be a| DBL fro|
|00000bc0| 6d 20 30 2e 30 20 74 6f | 20 31 2e 30 20 2a 2f 0d |m 0.0 to| 1.0 */.|
|00000bd0| 20 20 59 5f 53 63 61 6c | 61 72 20 3d 20 28 28 20 |  Y_Scal|ar = (( |
|00000be0| 28 44 42 4c 29 28 46 72 | 61 6d 65 2e 53 63 72 65 |(DBL)(Fr|ame.Scre|
|00000bf0| 65 6e 5f 48 65 69 67 68 | 74 20 2d 20 31 29 20 2d |en_Heigh|t - 1) -|
|00000c00| 20 79 29 20 2d 0d 20 20 | 20 20 28 44 42 4c 29 20 | y) -.  |  (DBL) |
|00000c10| 68 65 69 67 68 74 20 2f | 20 32 2e 30 29 20 2f 20 |height /| 2.0) / |
|00000c20| 28 44 42 4c 29 20 68 65 | 69 67 68 74 3b 0d 0d 20 |(DBL) he|ight;.. |
|00000c30| 20 56 53 63 61 6c 65 20 | 28 54 65 6d 70 5f 56 65 | VScale |(Temp_Ve|
|00000c40| 63 74 5f 31 2c 20 46 72 | 61 6d 65 2e 43 61 6d 65 |ct_1, Fr|ame.Came|
|00000c50| 72 61 2d 3e 55 70 2c 20 | 59 5f 53 63 61 6c 61 72 |ra->Up, |Y_Scalar|
|00000c60| 29 3b 0d 20 20 56 53 63 | 61 6c 65 20 28 54 65 6d |);.  VSc|ale (Tem|
|00000c70| 70 5f 56 65 63 74 5f 32 | 2c 20 46 72 61 6d 65 2e |p_Vect_2|, Frame.|
|00000c80| 43 61 6d 65 72 61 2d 3e | 52 69 67 68 74 2c 20 58 |Camera->|Right, X|
|00000c90| 5f 53 63 61 6c 61 72 29 | 3b 0d 20 20 56 41 64 64 |_Scalar)|;.  VAdd|
|00000ca0| 20 28 72 61 79 2d 3e 44 | 69 72 65 63 74 69 6f 6e | (ray->D|irection|
|00000cb0| 2c 20 54 65 6d 70 5f 56 | 65 63 74 5f 31 2c 20 54 |, Temp_V|ect_1, T|
|00000cc0| 65 6d 70 5f 56 65 63 74 | 5f 32 29 3b 0d 20 20 56 |emp_Vect|_2);.  V|
|00000cd0| 41 64 64 20 28 72 61 79 | 2d 3e 44 69 72 65 63 74 |Add (ray|->Direct|
|00000ce0| 69 6f 6e 2c 20 72 61 79 | 2d 3e 44 69 72 65 63 74 |ion, ray|->Direct|
|00000cf0| 69 6f 6e 2c 20 46 72 61 | 6d 65 2e 43 61 6d 65 72 |ion, Fra|me.Camer|
|00000d00| 61 2d 3e 44 69 72 65 63 | 74 69 6f 6e 29 3b 0d 20 |a->Direc|tion);. |
|00000d10| 20 56 4e 6f 72 6d 61 6c | 69 7a 65 20 28 72 61 79 | VNormal|ize (ray|
|00000d20| 2d 3e 44 69 72 65 63 74 | 69 6f 6e 2c 20 72 61 79 |->Direct|ion, ray|
|00000d30| 2d 3e 44 69 72 65 63 74 | 69 6f 6e 29 3b 0d 20 20 |->Direct|ion);.  |
|00000d40| 49 6e 69 74 69 61 6c 69 | 7a 65 5f 52 61 79 5f 43 |Initiali|ze_Ray_C|
|00000d50| 6f 6e 74 61 69 6e 65 72 | 73 20 28 72 61 79 29 3b |ontainer|s (ray);|
|00000d60| 0d 20 20 72 61 79 2d 3e | 51 75 61 64 72 69 63 5f |.  ray->|Quadric_|
|00000d70| 43 6f 6e 73 74 61 6e 74 | 73 5f 43 61 63 68 65 64 |Constant|s_Cached|
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|00000d90| 6f 69 64 20 52 65 61 64 | 5f 52 65 6e 64 65 72 65 |oid Read|_Rendere|
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|00000dd0| 64 20 63 68 61 72 20 52 | 65 64 2c 20 47 72 65 65 |d char R|ed, Gree|
|00000de0| 6e 2c 20 42 6c 75 65 3b | 0d 20 20 44 42 4c 20 67 |n, Blue;|.  DBL g|
|00000df0| 72 65 79 3b 0d 0d 20 20 | 6d 61 78 63 6c 72 20 3d |rey;..  |maxclr =|
|00000e00| 20 28 44 42 4c 29 28 31 | 20 3c 3c 20 43 6f 6c 6f | (DBL)(1| << Colo|
|00000e10| 72 5f 42 69 74 73 29 20 | 2d 20 31 2e 30 3b 0d 20 |r_Bits) |- 1.0;. |
|00000e20| 20 77 68 69 6c 65 20 28 | 28 72 63 20 3d 20 52 65 | while (|(rc = Re|
|00000e30| 61 64 5f 4c 69 6e 65 28 | 4f 75 74 70 75 74 5f 46 |ad_Line(|Output_F|
|00000e40| 69 6c 65 5f 48 61 6e 64 | 6c 65 2c 20 50 72 65 76 |ile_Hand|le, Prev|
|00000e50| 69 6f 75 73 5f 4c 69 6e | 65 2c 20 26 6c 69 6e 65 |ious_Lin|e, &line|
|00000e60| 5f 6e 75 6d 62 65 72 29 | 29 20 3d 3d 20 31 29 20 |_number)|) == 1) |
|00000e70| 0d 20 20 20 20 7b 0d 20 | 20 20 20 69 66 20 28 4f |.    {. |   if (O|
|00000e80| 70 74 69 6f 6e 73 20 26 | 20 44 49 53 50 4c 41 59 |ptions &| DISPLAY|
|00000e90| 29 0d 20 20 20 20 20 20 | 66 6f 72 20 28 78 20 3d |).      |for (x =|
|00000ea0| 20 30 20 3b 20 78 20 3c | 20 46 72 61 6d 65 2e 53 | 0 ; x <| Frame.S|
|00000eb0| 63 72 65 65 6e 5f 57 69 | 64 74 68 20 3b 20 78 2b |creen_Wi|dth ; x+|
|00000ec0| 2b 29 20 0d 20 20 20 20 | 20 20 7b 0d 20 20 20 20 |+) .    |  {.    |
|00000ed0| 20 20 69 66 20 28 50 61 | 6c 65 74 74 65 4f 70 74 |  if (Pa|letteOpt|
|00000ee0| 69 6f 6e 20 3d 3d 20 47 | 52 45 59 29 20 0d 20 20 |ion == G|REY) .  |
|00000ef0| 20 20 20 20 20 20 7b 0d | 20 20 20 20 20 20 20 20 |      {.|        |
|00000f00| 67 72 65 79 20 3d 20 50 | 72 65 76 69 6f 75 73 5f |grey = P|revious_|
|00000f10| 4c 69 6e 65 5b 78 5d 2e | 52 65 64 20 2a 20 30 2e |Line[x].|Red * 0.|
|00000f20| 32 38 37 20 2b 0d 20 20 | 20 20 20 20 20 20 50 72 |287 +.  |      Pr|
|00000f30| 65 76 69 6f 75 73 5f 4c | 69 6e 65 5b 78 5d 2e 47 |evious_L|ine[x].G|
|00000f40| 72 65 65 6e 20 2a 20 30 | 2e 35 38 39 20 2b 0d 20 |reen * 0|.589 +. |
|00000f50| 20 20 20 20 20 20 20 50 | 72 65 76 69 6f 75 73 5f |       P|revious_|
|00000f60| 4c 69 6e 65 5b 78 5d 2e | 42 6c 75 65 20 2a 20 30 |Line[x].|Blue * 0|
|00000f70| 2e 31 31 34 3b 0d 20 20 | 20 20 20 20 20 20 52 65 |.114;.  |      Re|
|00000f80| 64 20 3d 20 47 72 65 65 | 6e 20 3d 20 42 6c 75 65 |d = Gree|n = Blue|
|00000f90| 20 3d 20 28 75 6e 73 69 | 67 6e 65 64 20 63 68 61 | = (unsi|gned cha|
|00000fa0| 72 29 28 67 72 65 79 20 | 2a 20 6d 61 78 63 6c 72 |r)(grey |* maxclr|
|00000fb0| 29 3b 0d 20 20 20 20 20 | 20 20 20 7d 0d 20 20 20 |);.     |   }.   |
|00000fc0| 20 20 20 65 6c 73 65 20 | 0d 20 20 20 20 20 20 20 |   else |.       |
|00000fd0| 20 7b 0d 20 20 20 20 20 | 20 20 20 52 65 64 20 3d | {.     |   Red =|
|00000fe0| 20 28 75 6e 73 69 67 6e | 65 64 20 63 68 61 72 29 | (unsign|ed char)|
|00000ff0| 20 28 50 72 65 76 69 6f | 75 73 5f 4c 69 6e 65 5b | (Previo|us_Line[|
|00001000| 78 5d 2e 52 65 64 20 2a | 20 6d 61 78 63 6c 72 29 |x].Red *| maxclr)|
|00001010| 3b 0d 20 20 20 20 20 20 | 20 20 47 72 65 65 6e 20 |;.      |  Green |
|00001020| 3d 20 28 75 6e 73 69 67 | 6e 65 64 20 63 68 61 72 |= (unsig|ned char|
|00001030| 29 20 28 50 72 65 76 69 | 6f 75 73 5f 4c 69 6e 65 |) (Previ|ous_Line|
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|00001050| 6c 72 29 3b 0d 20 20 20 | 20 20 20 20 20 42 6c 75 |lr);.   |     Blu|
|00001060| 65 20 3d 20 28 75 6e 73 | 69 67 6e 65 64 20 63 68 |e = (uns|igned ch|
|00001070| 61 72 29 20 28 50 72 65 | 76 69 6f 75 73 5f 4c 69 |ar) (Pre|vious_Li|
|00001080| 6e 65 5b 78 5d 2e 42 6c | 75 65 20 2a 20 6d 61 78 |ne[x].Bl|ue * max|
|00001090| 63 6c 72 29 3b 0d 20 20 | 20 20 20 20 20 20 7d 0d |clr);.  |      }.|
|000010a0| 20 20 20 20 20 20 64 69 | 73 70 6c 61 79 5f 70 6c |      di|splay_pl|
|000010b0| 6f 74 20 28 78 2c 20 6c | 69 6e 65 5f 6e 75 6d 62 |ot (x, l|ine_numb|
|000010c0| 65 72 2c 20 52 65 64 2c | 20 47 72 65 65 6e 2c 20 |er, Red,| Green, |
|000010d0| 42 6c 75 65 29 3b 0d 20 | 20 20 20 20 20 43 4f 4f |Blue);. |     COO|
|000010e0| 50 45 52 41 54 45 20 20 | 20 20 20 2f 2a 20 4d 6f |PERATE  |   /* Mo|
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|00001100| 4a 4c 4e 20 31 32 2f 39 | 31 20 2a 2f 0d 20 20 20 |JLN 12/9|1 */.   |
|00001110| 20 20 20 20 20 7d 0d 20 | 20 20 20 20 20 7d 0d 0d |     }. |     }..|
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|00001130| 20 6c 69 6e 65 5f 6e 75 | 6d 62 65 72 2b 31 3b 0d | line_nu|mber+1;.|
|00001140| 0d 20 20 69 66 20 28 72 | 63 20 3d 3d 20 30 29 20 |.  if (r|c == 0) |
|00001150| 0d 20 20 20 20 7b 0d 20 | 20 20 20 43 6c 6f 73 65 |.    {. |   Close|
|00001160| 5f 46 69 6c 65 28 4f 75 | 74 70 75 74 5f 46 69 6c |_File(Ou|tput_Fil|
|00001170| 65 5f 48 61 6e 64 6c 65 | 29 3b 0d 20 20 20 20 69 |e_Handle|);.    i|
|00001180| 66 20 28 4f 70 65 6e 5f | 46 69 6c 65 20 28 4f 75 |f (Open_|File (Ou|
|00001190| 74 70 75 74 5f 46 69 6c | 65 5f 48 61 6e 64 6c 65 |tput_Fil|e_Handle|
|000011a0| 2c 20 4f 75 74 70 75 74 | 5f 46 69 6c 65 5f 4e 61 |, Output|_File_Na|
|000011b0| 6d 65 2c 0d 20 20 20 20 | 20 20 26 46 72 61 6d 65 |me,.    |  &Frame|
|000011c0| 2e 53 63 72 65 65 6e 5f | 57 69 64 74 68 2c 20 26 |.Screen_|Width, &|
|000011d0| 46 72 61 6d 65 2e 53 63 | 72 65 65 6e 5f 48 65 69 |Frame.Sc|reen_Hei|
|000011e0| 67 68 74 2c 20 46 69 6c | 65 5f 42 75 66 66 65 72 |ght, Fil|e_Buffer|
|000011f0| 5f 53 69 7a 65 2c 0d 20 | 20 20 20 20 20 41 50 50 |_Size,. |     APP|
|00001200| 45 4e 44 5f 4d 4f 44 45 | 29 20 21 3d 20 31 29 20 |END_MODE|) != 1) |
|00001210| 0d 20 20 20 20 20 20 7b | 0d 20 20 20 20 20 20 66 |.      {|.      f|
|00001220| 70 72 69 6e 74 66 20 28 | 73 74 64 65 72 72 2c 20 |printf (|stderr, |
|00001230| 22 45 72 72 6f 72 20 6f | 70 65 6e 69 6e 67 20 6f |"Error o|pening o|
|00001240| 75 74 70 75 74 20 66 69 | 6c 65 5c 6e 22 29 3b 0d |utput fi|le\n");.|
|00001250| 20 20 20 20 20 20 66 66 | 6c 75 73 68 28 73 74 64 |      ff|lush(std|
|00001260| 6f 75 74 29 3b 0d 20 20 | 20 20 20 20 63 6c 6f 73 |out);.  |    clos|
|00001270| 65 5f 61 6c 6c 28 29 3b | 0d 20 20 20 20 20 20 65 |e_all();|.      e|
|00001280| 78 69 74 28 31 29 3b 0d | 20 20 20 20 20 20 7d 0d |xit(1);.|      }.|
|00001290| 20 20 20 20 72 65 74 75 | 72 6e 3b 0d 20 20 20 20 |    retu|rn;.    |
|000012a0| 7d 0d 0d 20 20 66 70 72 | 69 6e 74 66 20 28 73 74 |}..  fpr|intf (st|
|000012b0| 64 65 72 72 2c 20 22 45 | 72 72 6f 72 20 72 65 61 |derr, "E|rror rea|
|000012c0| 64 69 6e 67 20 61 62 6f | 72 74 65 64 20 64 61 74 |ding abo|rted dat|
|000012d0| 61 20 66 69 6c 65 5c 6e | 22 29 3b 0d 20 20 7d 0d |a file\n|");.  }.|
|000012e0| 0d 76 6f 69 64 20 53 74 | 61 72 74 5f 54 72 61 63 |.void St|art_Trac|
|000012f0| 69 6e 67 20 28 29 0d 20 | 20 7b 0d 20 20 43 4f 4c |ing (). | {.  COL|
|00001300| 4f 55 52 20 43 6f 6c 6f | 75 72 3b 0d 20 20 72 65 |OUR Colo|ur;.  re|
|00001310| 67 69 73 74 65 72 20 69 | 6e 74 20 78 2c 20 79 3b |gister i|nt x, y;|
|00001320| 0d 20 20 75 6e 73 69 67 | 6e 65 64 20 63 68 61 72 |.  unsig|ned char|
|00001330| 20 52 65 64 2c 20 47 72 | 65 65 6e 2c 20 42 6c 75 | Red, Gr|een, Blu|
|00001340| 65 3b 0d 20 20 44 42 4c | 20 67 72 65 79 3b 0d 0d |e;.  DBL| grey;..|
|00001350| 20 20 66 6f 72 20 28 79 | 20 3d 20 28 4f 70 74 69 |  for (y| = (Opti|
|00001360| 6f 6e 73 20 26 20 41 4e | 54 49 41 4c 49 41 53 29 |ons & AN|TIALIAS)|
|00001370| 3f 46 69 72 73 74 5f 4c | 69 6e 65 2d 31 3a 46 69 |?First_L|ine-1:Fi|
|00001380| 72 73 74 5f 4c 69 6e 65 | 3b 20 79 3c 4c 61 73 74 |rst_Line|; y<Last|
|00001390| 5f 4c 69 6e 65 3b 20 79 | 2b 2b 29 20 0d 20 20 20 |_Line; y|++) .   |
|000013a0| 20 7b 0d 0d 20 20 20 20 | 63 68 65 63 6b 5f 73 74 | {..    |check_st|
|000013b0| 61 74 73 28 79 29 3b 0d | 0d 20 20 20 20 66 6f 72 |ats(y);.|.    for|
|000013c0| 20 28 78 20 3d 20 46 69 | 72 73 74 5f 43 6f 6c 75 | (x = Fi|rst_Colu|
|000013d0| 6d 6e 20 3b 20 78 20 3c | 20 4c 61 73 74 5f 43 6f |mn ; x <| Last_Co|
|000013e0| 6c 75 6d 6e 20 3b 20 78 | 2b 2b 29 20 0d 20 20 20 |lumn ; x|++) .   |
|000013f0| 20 20 20 7b 0d 0d 20 20 | 20 20 20 20 43 68 65 63 |   {..  |    Chec|
|00001400| 6b 5f 55 73 65 72 5f 41 | 62 6f 72 74 28 31 29 3b |k_User_A|bort(1);|
|00001410| 0d 20 20 20 20 20 20 0d | 20 20 20 20 20 20 4e 75 |.      .|      Nu|
|00001420| 6d 62 65 72 5f 4f 66 5f | 50 69 78 65 6c 73 2b 2b |mber_Of_|Pixels++|
|00001430| 3b 0d 0d 20 20 20 20 20 | 20 43 72 65 61 74 65 5f |;..     | Create_|
|00001440| 52 61 79 20 28 43 4d 5f | 52 61 79 2c 20 46 72 61 |Ray (CM_|Ray, Fra|
|00001450| 6d 65 2e 53 63 72 65 65 | 6e 5f 57 69 64 74 68 2c |me.Scree|n_Width,|
|00001460| 20 46 72 61 6d 65 2e 53 | 63 72 65 65 6e 5f 48 65 | Frame.S|creen_He|
|00001470| 69 67 68 74 2c 20 28 44 | 42 4c 29 20 78 2c 20 28 |ight, (D|BL) x, (|
|00001480| 44 42 4c 29 20 79 29 3b | 0d 20 20 20 20 20 20 54 |DBL) y);|.      T|
|00001490| 72 61 63 65 5f 4c 65 76 | 65 6c 20 3d 20 30 3b 0d |race_Lev|el = 0;.|
|000014a0| 20 20 20 20 20 20 54 72 | 61 63 65 20 28 26 52 61 |      Tr|ace (&Ra|
|000014b0| 79 2c 20 26 43 6f 6c 6f | 75 72 29 3b 0d 20 20 20 |y, &Colo|ur);.   |
|000014c0| 20 20 20 43 6c 69 70 5f | 43 6f 6c 6f 75 72 20 28 |   Clip_|Colour (|
|000014d0| 26 43 6f 6c 6f 75 72 2c | 20 26 43 6f 6c 6f 75 72 |&Colour,| &Colour|
|000014e0| 29 3b 0d 0d 20 20 20 20 | 20 20 43 75 72 72 65 6e |);..    |  Curren|
|000014f0| 74 5f 4c 69 6e 65 5b 78 | 5d 20 3d 20 43 6f 6c 6f |t_Line[x|] = Colo|
|00001500| 75 72 3b 0d 0d 20 20 20 | 20 20 20 69 66 20 28 4f |ur;..   |   if (O|
|00001510| 70 74 69 6f 6e 73 20 26 | 20 41 4e 54 49 41 4c 49 |ptions &| ANTIALI|
|00001520| 41 53 29 20 20 20 20 20 | 20 0d 20 20 20 20 20 20 |AS)     | .      |
|00001530| 20 20 64 6f 5f 61 6e 74 | 69 5f 61 6c 69 61 73 69 |  do_ant|i_aliasi|
|00001540| 6e 67 28 78 2c 20 79 2c | 20 26 43 6f 6c 6f 75 72 |ng(x, y,| &Colour|
|00001550| 29 3b 20 0d 0d 20 20 20 | 20 20 20 69 66 20 28 79 |); ..   |   if (y|
|00001560| 20 21 3d 20 46 69 72 73 | 74 5f 4c 69 6e 65 2d 31 | != Firs|t_Line-1|
|00001570| 29 20 0d 20 20 20 20 20 | 20 20 20 7b 0d 0d 20 20 |) .     |   {..  |
|00001580| 20 20 20 20 20 20 69 66 | 20 28 50 61 6c 65 74 74 |      if| (Palett|
|00001590| 65 4f 70 74 69 6f 6e 20 | 3d 3d 20 47 52 45 59 29 |eOption |== GREY)|
|000015a0| 20 0d 20 20 20 20 20 20 | 20 20 20 20 7b 0d 20 20 | .      |    {.  |
|000015b0| 20 20 20 20 20 20 20 20 | 67 72 65 79 20 3d 20 43 |        |grey = C|
|000015c0| 6f 6c 6f 75 72 2e 52 65 | 64 20 2a 20 30 2e 32 38 |olour.Re|d * 0.28|
|000015d0| 37 20 2b 0d 20 20 20 20 | 20 20 20 20 20 20 43 6f |7 +.    |      Co|
|000015e0| 6c 6f 75 72 2e 47 72 65 | 65 6e 20 2a 20 30 2e 35 |lour.Gre|en * 0.5|
|000015f0| 38 39 20 2b 0d 20 20 20 | 20 20 20 20 20 20 20 43 |89 +.   |       C|
|00001600| 6f 6c 6f 75 72 2e 42 6c | 75 65 20 2a 20 30 2e 31 |olour.Bl|ue * 0.1|
|00001610| 31 34 3b 0d 20 20 20 20 | 20 20 20 20 20 20 52 65 |14;.    |      Re|
|00001620| 64 20 3d 20 47 72 65 65 | 6e 20 3d 20 42 6c 75 65 |d = Gree|n = Blue|
|00001630| 20 3d 20 28 75 6e 73 69 | 67 6e 65 64 20 63 68 61 | = (unsi|gned cha|
|00001640| 72 29 28 67 72 65 79 20 | 2a 20 6d 61 78 63 6c 72 |r)(grey |* maxclr|
|00001650| 29 3b 0d 20 20 20 20 20 | 20 20 20 20 20 7d 0d 20 |);.     |     }. |
|00001660| 20 20 20 20 20 20 20 65 | 6c 73 65 20 0d 20 20 20 |       e|lse .   |
|00001670| 20 20 20 20 20 20 20 7b | 0d 20 20 20 20 20 20 20 |       {|.       |
|00001680| 20 20 20 52 65 64 20 3d | 20 28 75 6e 73 69 67 6e |   Red =| (unsign|
|00001690| 65 64 20 63 68 61 72 29 | 20 28 43 6f 6c 6f 75 72 |ed char)| (Colour|
|000016a0| 2e 52 65 64 20 2a 20 6d | 61 78 63 6c 72 29 3b 0d |.Red * m|axclr);.|
|000016b0| 20 20 20 20 20 20 20 20 | 20 20 47 72 65 65 6e 20 |        |  Green |
|000016c0| 3d 20 28 75 6e 73 69 67 | 6e 65 64 20 63 68 61 72 |= (unsig|ned char|
|000016d0| 29 20 28 43 6f 6c 6f 75 | 72 2e 47 72 65 65 6e 20 |) (Colou|r.Green |
|000016e0| 2a 20 6d 61 78 63 6c 72 | 29 3b 0d 20 20 20 20 20 |* maxclr|);.     |
|000016f0| 20 20 20 20 20 42 6c 75 | 65 20 3d 20 28 75 6e 73 |     Blu|e = (uns|
|00001700| 69 67 6e 65 64 20 63 68 | 61 72 29 20 28 43 6f 6c |igned ch|ar) (Col|
|00001710| 6f 75 72 2e 42 6c 75 65 | 20 2a 20 6d 61 78 63 6c |our.Blue| * maxcl|
|00001720| 72 29 3b 0d 20 20 20 20 | 20 20 20 20 20 20 7d 0d |r);.    |      }.|
|00001730| 20 20 20 20 20 20 20 20 | 69 66 20 28 4f 70 74 69 |        |if (Opti|
|00001740| 6f 6e 73 20 26 20 44 49 | 53 50 4c 41 59 29 0d 20 |ons & DI|SPLAY). |
|00001750| 20 20 20 20 20 20 20 20 | 20 64 69 73 70 6c 61 79 |        | display|
|00001760| 5f 70 6c 6f 74 20 28 78 | 2c 20 79 2c 20 52 65 64 |_plot (x|, y, Red|
|00001770| 2c 20 47 72 65 65 6e 2c | 20 42 6c 75 65 29 3b 0d |, Green,| Blue);.|
|00001780| 20 20 20 20 20 20 20 20 | 7d 0d 20 20 20 20 20 20 |        |}.      |
|00001790| 7d 0d 20 20 20 20 6f 75 | 74 70 75 74 5f 6c 69 6e |}.    ou|tput_lin|
|000017a0| 65 28 79 29 3b 0d 20 20 | 20 20 7d 0d 0d 20 20 69 |e(y);.  |  }..  i|
|000017b0| 66 20 28 4f 70 74 69 6f | 6e 73 20 26 20 44 49 53 |f (Optio|ns & DIS|
|000017c0| 4b 57 52 49 54 45 29 20 | 0d 20 20 20 20 7b 0d 20 |KWRITE) |.    {. |
|000017d0| 20 20 20 69 66 20 28 4c | 61 73 74 5f 4c 69 6e 65 |   if (L|ast_Line|
|000017e0| 20 21 3d 20 46 69 72 73 | 74 5f 4c 69 6e 65 29 0d | != Firs|t_Line).|
|000017f0| 20 20 20 20 57 72 69 74 | 65 5f 4c 69 6e 65 20 28 |    Writ|e_Line (|
|00001800| 4f 75 74 70 75 74 5f 46 | 69 6c 65 5f 48 61 6e 64 |Output_F|ile_Hand|
|00001810| 6c 65 2c 20 50 72 65 76 | 69 6f 75 73 5f 4c 69 6e |le, Prev|ious_Lin|
|00001820| 65 2c 20 4c 61 73 74 5f | 4c 69 6e 65 20 2d 20 31 |e, Last_|Line - 1|
|00001830| 29 3b 0d 20 20 20 20 7d | 0d 20 20 7d 0d 0d 73 74 |);.    }|.  }..st|
|00001840| 61 74 69 63 20 76 6f 69 | 64 20 63 68 65 63 6b 5f |atic voi|d check_|
|00001850| 73 74 61 74 73 28 79 29 | 0d 72 65 67 69 73 74 65 |stats(y)|.registe|
|00001860| 72 20 69 6e 74 20 79 3b | 0d 20 20 7b 0d 20 20 46 |r int y;|.  {.  F|
|00001870| 49 4c 45 20 2a 73 74 61 | 74 5f 66 69 6c 65 3b 0d |ILE *sta|t_file;.|
|00001880| 0d 20 20 2f 2a 20 4e 65 | 77 20 76 65 72 62 6f 73 |.  /* Ne|w verbos|
|00001890| 65 20 6f 70 74 69 6f 6e | 73 20 43 64 57 20 2a 2f |e option|s CdW */|
|000018a0| 0d 20 20 69 66 20 28 4f | 70 74 69 6f 6e 73 20 26 |.  if (O|ptions &|
|000018b0| 20 56 45 52 42 4f 53 45 | 20 26 26 20 56 65 72 62 | VERBOSE| && Verb|
|000018c0| 6f 73 65 46 6f 72 6d 61 | 74 3d 3d 27 30 27 29 0d |oseForma|t=='0').|
|000018d0| 20 20 20 20 7b 0d 20 20 | 20 20 70 72 69 6e 74 66 |    {.  |  printf|
|000018e0| 20 28 22 50 4f 56 2d 52 | 61 79 20 72 65 6e 64 65 | ("POV-R|ay rende|
|000018f0| 72 69 6e 67 20 25 73 20 | 74 6f 20 25 73 22 2c 49 |ring %s |to %s",I|
|00001900| 6e 70 75 74 5f 46 69 6c | 65 5f 4e 61 6d 65 2c 4f |nput_Fil|e_Name,O|
|00001910| 75 74 70 75 74 5f 46 69 | 6c 65 5f 4e 61 6d 65 29 |utput_Fi|le_Name)|
|00001920| 3b 0d 20 20 20 20 69 66 | 28 28 46 69 72 73 74 5f |;.    if|((First_|
|00001930| 4c 69 6e 65 20 21 3d 20 | 30 29 20 7c 7c 20 28 4c |Line != |0) || (L|
|00001940| 61 73 74 5f 4c 69 6e 65 | 20 21 3d 20 46 72 61 6d |ast_Line| != Fram|
|00001950| 65 2e 53 63 72 65 65 6e | 5f 48 65 69 67 68 74 29 |e.Screen|_Height)|
|00001960| 29 0d 20 20 20 20 20 20 | 70 72 69 6e 74 66 28 22 |).      |printf("|
|00001970| 20 66 72 6f 6d 20 25 34 | 64 20 74 6f 20 25 34 64 | from %4|d to %4d|
|00001980| 3a 5c 6e 22 2c 46 69 72 | 73 74 5f 4c 69 6e 65 2b |:\n",Fir|st_Line+|
|00001990| 31 2c 20 4c 61 73 74 5f | 4c 69 6e 65 29 3b 0d 20 |1, Last_|Line);. |
|000019a0| 20 20 20 65 6c 73 65 0d | 20 20 20 20 20 20 70 72 |   else.|      pr|
|000019b0| 69 6e 74 66 20 28 22 3a | 5c 6e 22 29 3b 0d 20 20 |intf (":|\n");.  |
|000019c0| 20 20 70 72 69 6e 74 66 | 20 28 22 52 65 73 20 25 |  printf| ("Res %|
|000019d0| 34 64 20 58 20 25 34 64 | 2e 20 43 61 6c 63 20 6c |4d X %4d|. Calc l|
|000019e0| 69 6e 65 20 25 34 64 20 | 6f 66 20 25 34 64 22 2c |ine %4d |of %4d",|
|000019f0| 46 72 61 6d 65 2e 53 63 | 72 65 65 6e 5f 57 69 64 |Frame.Sc|reen_Wid|
|00001a00| 74 68 2c 20 46 72 61 6d | 65 2e 53 63 72 65 65 6e |th, Fram|e.Screen|
|00001a10| 5f 48 65 69 67 68 74 2c | 20 28 79 2d 46 69 72 73 |_Height,| (y-Firs|
|00001a20| 74 5f 4c 69 6e 65 29 2b | 31 2c 20 4c 61 73 74 5f |t_Line)+|1, Last_|
|00001a30| 4c 69 6e 65 2d 46 69 72 | 73 74 5f 4c 69 6e 65 29 |Line-Fir|st_Line)|
|00001a40| 3b 0d 20 20 20 20 69 66 | 20 28 21 28 4f 70 74 69 |;.    if| (!(Opti|
|00001a50| 6f 6e 73 20 26 20 41 4e | 54 49 41 4c 49 41 53 29 |ons & AN|TIALIAS)|
|00001a60| 29 0d 20 20 20 20 20 20 | 70 72 69 6e 74 66 28 22 |).      |printf("|
|00001a70| 2e 22 29 3b 0d 20 20 20 | 20 7d 0d 20 20 69 66 20 |.");.   | }.  if |
|00001a80| 28 4f 70 74 69 6f 6e 73 | 20 26 20 56 45 52 42 4f |(Options| & VERBO|
|00001a90| 53 45 5f 46 49 4c 45 29 | 0d 20 20 20 20 7b 0d 20 |SE_FILE)|.    {. |
|00001aa0| 20 20 20 73 74 61 74 5f | 66 69 6c 65 20 3d 20 66 |   stat_|file = f|
|00001ab0| 6f 70 65 6e 28 53 74 61 | 74 5f 46 69 6c 65 5f 4e |open(Sta|t_File_N|
|00001ac0| 61 6d 65 2c 22 77 2b 74 | 22 29 3b 0d 20 20 20 20 |ame,"w+t|");.    |
|00001ad0| 66 70 72 69 6e 74 66 20 | 28 73 74 61 74 5f 66 69 |fprintf |(stat_fi|
|00001ae0| 6c 65 2c 22 4c 69 6e 65 | 20 25 34 64 2e 5c 6e 22 |le,"Line| %4d.\n"|
|00001af0| 2c 20 79 29 3b 0d 20 20 | 20 20 66 63 6c 6f 73 65 |, y);.  |  fclose|
|00001b00| 28 73 74 61 74 5f 66 69 | 6c 65 29 3b 0d 20 20 20 |(stat_fi|le);.   |
|00001b10| 20 7d 0d 0d 20 20 2f 2a | 20 55 73 65 20 2d 76 4f | }..  /*| Use -vO|
|00001b20| 20 66 6f 72 20 4f 6c 64 | 20 73 74 79 6c 65 20 76 | for Old| style v|
|00001b30| 65 72 62 6f 73 65 20 2a | 2f 0d 20 20 69 66 20 28 |erbose *|/.  if (|
|00001b40| 4f 70 74 69 6f 6e 73 20 | 26 20 56 45 52 42 4f 53 |Options |& VERBOS|
|00001b50| 45 20 26 26 20 28 56 65 | 72 62 6f 73 65 46 6f 72 |E && (Ve|rboseFor|
|00001b60| 6d 61 74 3d 3d 27 4f 27 | 29 29 20 0d 20 20 20 20 |mat=='O'|)) .    |
|00001b70| 7b 0d 20 20 20 20 70 72 | 69 6e 74 66 20 28 22 4c |{.    pr|intf ("L|
|00001b80| 69 6e 65 20 25 34 64 22 | 2c 20 79 29 3b 0d 20 20 |ine %4d"|, y);.  |
|00001b90| 20 20 7d 0d 20 20 69 66 | 20 28 4f 70 74 69 6f 6e |  }.  if| (Option|
|00001ba0| 73 20 26 20 56 45 52 42 | 4f 53 45 20 26 26 20 56 |s & VERB|OSE && V|
|00001bb0| 65 72 62 6f 73 65 46 6f | 72 6d 61 74 3d 3d 27 31 |erboseFo|rmat=='1|
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|00001bd0| 69 6e 74 66 20 28 73 74 | 64 65 72 72 2c 22 52 65 |intf (st|derr,"Re|
|00001be0| 73 20 25 34 64 20 58 20 | 25 34 64 2e 20 43 61 6c |s %4d X |%4d. Cal|
|00001bf0| 63 20 6c 69 6e 65 20 25 | 34 64 20 6f 66 20 25 34 |c line %|4d of %4|
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|00001c60| 70 74 69 6f 6e 73 20 26 | 20 41 4e 54 49 41 4c 49 |ptions &| ANTIALI|
|00001c70| 41 53 29 29 0d 20 20 20 | 20 20 20 66 70 72 69 6e |AS)).   |   fprin|
|00001c80| 74 66 28 73 74 64 65 72 | 72 2c 22 2e 22 29 3b 0d |tf(stder|r,".");.|
|00001c90| 20 20 20 20 7d 0d 0d 20 | 20 69 66 20 28 4f 70 74 |    }.. | if (Opt|
|00001ca0| 69 6f 6e 73 20 26 20 41 | 4e 54 49 41 4c 49 41 53 |ions & A|NTIALIAS|
|00001cb0| 29 0d 20 20 20 20 53 75 | 70 65 72 53 61 6d 70 6c |).    Su|perSampl|
|00001cc0| 65 43 6f 75 6e 74 20 3d | 20 30 3b 0d 20 20 7d 0d |eCount =| 0;.  }.|
|00001cd0| 0d 73 74 61 74 69 63 20 | 76 6f 69 64 20 64 6f 5f |.static |void do_|
|00001ce0| 61 6e 74 69 5f 61 6c 69 | 61 73 69 6e 67 28 78 2c |anti_ali|asing(x,|
|00001cf0| 20 79 2c 20 43 6f 6c 6f | 75 72 29 0d 72 65 67 69 | y, Colo|ur).regi|
|00001d00| 73 74 65 72 20 69 6e 74 | 20 78 2c 20 79 3b 0d 43 |ster int| x, y;.C|
|00001d10| 4f 4c 4f 55 52 20 2a 43 | 6f 6c 6f 75 72 3b 0d 20 |OLOUR *C|olour;. |
|00001d20| 20 7b 0d 20 20 63 68 61 | 72 20 41 6e 74 69 61 6c | {.  cha|r Antial|
|00001d30| 69 61 73 5f 43 65 6e 74 | 65 72 5f 46 6c 61 67 20 |ias_Cent|er_Flag |
|00001d40| 3d 20 30 3b 0d 0d 20 20 | 43 75 72 72 65 6e 74 5f |= 0;..  |Current_|
|00001d50| 4c 69 6e 65 5f 41 6e 74 | 69 61 6c 69 61 73 65 64 |Line_Ant|ialiased|
|00001d60| 5f 46 6c 61 67 73 5b 78 | 5d 20 3d 20 30 3b 0d 0d |_Flags[x|] = 0;..|
|00001d70| 20 20 69 66 20 28 78 20 | 21 3d 20 30 29 20 0d 20 |  if (x |!= 0) . |
|00001d80| 20 20 20 7b 0d 20 20 20 | 20 69 66 20 28 43 6f 6c |   {.   | if (Col|
|00001d90| 6f 75 72 5f 44 69 73 74 | 61 6e 63 65 20 28 26 43 |our_Dist|ance (&C|
|00001da0| 75 72 72 65 6e 74 5f 4c | 69 6e 65 5b 78 2d 31 5d |urrent_L|ine[x-1]|
|00001db0| 2c 20 26 43 75 72 72 65 | 6e 74 5f 4c 69 6e 65 5b |, &Curre|nt_Line[|
|00001dc0| 78 5d 29 0d 20 20 20 20 | 20 20 3e 3d 20 46 72 61 |x]).    |  >= Fra|
|00001dd0| 6d 65 2e 41 6e 74 69 61 | 6c 69 61 73 5f 54 68 72 |me.Antia|lias_Thr|
|00001de0| 65 73 68 6f 6c 64 29 20 | 0d 20 20 20 20 20 20 7b |eshold) |.      {|
|00001df0| 0d 20 20 20 20 20 20 41 | 6e 74 69 61 6c 69 61 73 |.      A|ntialias|
|00001e00| 5f 43 65 6e 74 65 72 5f | 46 6c 61 67 20 3d 20 31 |_Center_|Flag = 1|
|00001e10| 3b 0d 20 20 20 20 20 20 | 69 66 20 28 21 28 43 75 |;.      |if (!(Cu|
|00001e20| 72 72 65 6e 74 5f 4c 69 | 6e 65 5f 41 6e 74 69 61 |rrent_Li|ne_Antia|
|00001e30| 6c 69 61 73 65 64 5f 46 | 6c 61 67 73 5b 78 2d 31 |liased_F|lags[x-1|
|00001e40| 5d 29 29 20 0d 20 20 20 | 20 20 20 20 20 7b 0d 20 |])) .   |     {. |
|00001e50| 20 20 20 20 20 20 20 53 | 75 70 65 72 73 61 6d 70 |       S|upersamp|
|00001e60| 6c 65 20 28 26 43 75 72 | 72 65 6e 74 5f 4c 69 6e |le (&Cur|rent_Lin|
|00001e70| 65 5b 78 2d 31 5d 2c 0d | 20 20 20 20 20 20 20 20 |e[x-1],.|        |
|00001e80| 20 20 78 2d 31 2c 20 79 | 2c 20 46 72 61 6d 65 2e |  x-1, y|, Frame.|
|00001e90| 53 63 72 65 65 6e 5f 57 | 69 64 74 68 2c 20 46 72 |Screen_W|idth, Fr|
|00001ea0| 61 6d 65 2e 53 63 72 65 | 65 6e 5f 48 65 69 67 68 |ame.Scre|en_Heigh|
|00001eb0| 74 29 3b 0d 20 20 20 20 | 20 20 20 20 43 75 72 72 |t);.    |    Curr|
|00001ec0| 65 6e 74 5f 4c 69 6e 65 | 5f 41 6e 74 69 61 6c 69 |ent_Line|_Antiali|
|00001ed0| 61 73 65 64 5f 46 6c 61 | 67 73 5b 78 2d 31 5d 20 |ased_Fla|gs[x-1] |
|00001ee0| 3d 20 31 3b 0d 20 20 20 | 20 20 20 20 20 53 75 70 |= 1;.   |     Sup|
|00001ef0| 65 72 53 61 6d 70 6c 65 | 43 6f 75 6e 74 2b 2b 3b |erSample|Count++;|
|00001f00| 0d 20 20 20 20 20 20 20 | 20 7d 0d 20 20 20 20 20 |.       | }.     |
|00001f10| 20 7d 0d 20 20 20 20 7d | 0d 0d 20 20 69 66 20 28 | }.    }|..  if (|
|00001f20| 79 20 21 3d 20 46 69 72 | 73 74 5f 4c 69 6e 65 2d |y != Fir|st_Line-|
|00001f30| 31 29 20 0d 20 20 20 20 | 7b 0d 20 20 20 20 69 66 |1) .    |{.    if|
|00001f40| 20 28 43 6f 6c 6f 75 72 | 5f 44 69 73 74 61 6e 63 | (Colour|_Distanc|
|00001f50| 65 20 28 26 50 72 65 76 | 69 6f 75 73 5f 4c 69 6e |e (&Prev|ious_Lin|
|00001f60| 65 5b 78 5d 2c 20 26 43 | 75 72 72 65 6e 74 5f 4c |e[x], &C|urrent_L|
|00001f70| 69 6e 65 5b 78 5d 29 0d | 20 20 20 20 20 20 3e 3d |ine[x]).|      >=|
|00001f80| 20 46 72 61 6d 65 2e 41 | 6e 74 69 61 6c 69 61 73 | Frame.A|ntialias|
|00001f90| 5f 54 68 72 65 73 68 6f | 6c 64 29 20 0d 20 20 20 |_Thresho|ld) .   |
|00001fa0| 20 20 20 7b 0d 20 20 20 | 20 20 20 41 6e 74 69 61 |   {.   |   Antia|
|00001fb0| 6c 69 61 73 5f 43 65 6e | 74 65 72 5f 46 6c 61 67 |lias_Cen|ter_Flag|
|00001fc0| 20 3d 20 31 3b 0d 20 20 | 20 20 20 20 69 66 20 28 | = 1;.  |    if (|
|00001fd0| 21 28 50 72 65 76 69 6f | 75 73 5f 4c 69 6e 65 5f |!(Previo|us_Line_|
|00001fe0| 41 6e 74 69 61 6c 69 61 | 73 65 64 5f 46 6c 61 67 |Antialia|sed_Flag|
|00001ff0| 73 5b 78 5d 29 29 20 0d | 20 20 20 20 20 20 20 20 |s[x])) .|        |
|00002000| 7b 0d 20 20 20 20 20 20 | 20 20 53 75 70 65 72 73 |{.      |  Supers|
|00002010| 61 6d 70 6c 65 20 28 26 | 50 72 65 76 69 6f 75 73 |ample (&|Previous|
|00002020| 5f 4c 69 6e 65 5b 78 5d | 2c 0d 20 20 20 20 20 20 |_Line[x]|,.      |
|00002030| 20 20 20 20 78 2c 20 79 | 2d 31 2c 20 46 72 61 6d |    x, y|-1, Fram|
|00002040| 65 2e 53 63 72 65 65 6e | 5f 57 69 64 74 68 2c 20 |e.Screen|_Width, |
|00002050| 46 72 61 6d 65 2e 53 63 | 72 65 65 6e 5f 48 65 69 |Frame.Sc|reen_Hei|
|00002060| 67 68 74 29 3b 0d 20 20 | 20 20 20 20 20 20 50 72 |ght);.  |      Pr|
|00002070| 65 76 69 6f 75 73 5f 4c | 69 6e 65 5f 41 6e 74 69 |evious_L|ine_Anti|
|00002080| 61 6c 69 61 73 65 64 5f | 46 6c 61 67 73 5b 78 5d |aliased_|Flags[x]|
|00002090| 20 3d 20 31 3b 0d 20 20 | 20 20 20 20 20 20 53 75 | = 1;.  |      Su|
|000020a0| 70 65 72 53 61 6d 70 6c | 65 43 6f 75 6e 74 2b 2b |perSampl|eCount++|
|000020b0| 3b 0d 20 20 20 20 20 20 | 20 20 7d 0d 20 20 20 20 |;.      |  }.    |
|000020c0| 20 20 7d 0d 20 20 20 20 | 7d 0d 0d 20 20 69 66 20 |  }.    |}..  if |
|000020d0| 28 41 6e 74 69 61 6c 69 | 61 73 5f 43 65 6e 74 65 |(Antiali|as_Cente|
|000020e0| 72 5f 46 6c 61 67 29 20 | 0d 20 20 20 20 7b 0d 20 |r_Flag) |.    {. |
|000020f0| 20 20 20 53 75 70 65 72 | 73 61 6d 70 6c 65 20 28 |   Super|sample (|
|00002100| 26 43 75 72 72 65 6e 74 | 5f 4c 69 6e 65 5b 78 5d |&Current|_Line[x]|
|00002110| 2c 0d 20 20 20 20 20 20 | 78 2c 20 79 2c 20 46 72 |,.      |x, y, Fr|
|00002120| 61 6d 65 2e 53 63 72 65 | 65 6e 5f 57 69 64 74 68 |ame.Scre|en_Width|
|00002130| 2c 20 46 72 61 6d 65 2e | 53 63 72 65 65 6e 5f 48 |, Frame.|Screen_H|
|00002140| 65 69 67 68 74 29 3b 0d | 20 20 20 20 43 75 72 72 |eight);.|    Curr|
|00002150| 65 6e 74 5f 4c 69 6e 65 | 5f 41 6e 74 69 61 6c 69 |ent_Line|_Antiali|
|00002160| 61 73 65 64 5f 46 6c 61 | 67 73 5b 78 5d 20 3d 20 |ased_Fla|gs[x] = |
|00002170| 31 3b 0d 20 20 20 20 2a | 43 6f 6c 6f 75 72 20 3d |1;.    *|Colour =|
|00002180| 20 43 75 72 72 65 6e 74 | 5f 4c 69 6e 65 5b 78 5d | Current|_Line[x]|
|00002190| 3b 0d 20 20 20 20 53 75 | 70 65 72 53 61 6d 70 6c |;.    Su|perSampl|
|000021a0| 65 43 6f 75 6e 74 2b 2b | 3b 0d 20 20 20 20 7d 0d |eCount++|;.    }.|
|000021b0| 0d 20 20 72 65 74 75 72 | 6e 3b 0d 20 20 7d 0d 0d |.  retur|n;.  }..|
|000021c0| 0d 76 6f 69 64 20 49 6e | 69 74 69 61 6c 69 7a 65 |.void In|itialize|
|000021d0| 5f 52 65 6e 64 65 72 65 | 72 20 50 41 52 41 4d 53 |_Rendere|r PARAMS|
|000021e0| 28 28 76 6f 69 64 29 29 | 0d 20 20 7b 0d 20 20 72 |((void))|.  {.  r|
|000021f0| 65 67 69 73 74 65 72 20 | 69 6e 74 20 69 3b 0d 0d |egister |int i;..|
|00002200| 20 20 43 4d 5f 52 61 79 | 20 3d 20 26 52 61 79 3b |  CM_Ray| = &Ray;|
|00002210| 0d 0d 20 20 6d 61 78 63 | 6c 72 20 3d 20 28 44 42 |..  maxc|lr = (DB|
|00002220| 4c 29 28 31 20 3c 3c 20 | 43 6f 6c 6f 72 5f 42 69 |L)(1 << |Color_Bi|
|00002230| 74 73 29 20 2d 20 31 2e | 30 3b 0d 0d 20 20 2f 2a |ts) - 1.|0;..  /*|
|00002240| 20 54 68 65 73 65 20 6d | 61 6c 6c 6f 63 27 73 20 | These m|alloc's |
|00002250| 61 72 65 20 6e 65 76 65 | 72 20 66 72 65 65 64 21 |are neve|r freed!|
|00002260| 20 57 68 79 20 3f 20 4e | 65 65 64 20 61 20 44 65 | Why ? N|eed a De|
|00002270| 69 6e 69 74 5f 52 65 6e | 64 65 72 65 72 28 29 20 |init_Ren|derer() |
|00002280| 3f 2a 2f 0d 20 20 50 72 | 65 76 69 6f 75 73 5f 4c |?*/.  Pr|evious_L|
|00002290| 69 6e 65 20 3d 20 28 43 | 4f 4c 4f 55 52 20 2a 29 |ine = (C|OLOUR *)|
|000022a0| 20 6d 61 6c 6c 6f 63 20 | 28 73 69 7a 65 6f 66 20 | malloc |(sizeof |
|000022b0| 28 43 4f 4c 4f 55 52 29 | 2a 28 46 72 61 6d 65 2e |(COLOUR)|*(Frame.|
|000022c0| 53 63 72 65 65 6e 5f 57 | 69 64 74 68 20 2b 20 31 |Screen_W|idth + 1|
|000022d0| 29 29 3b 0d 20 20 43 75 | 72 72 65 6e 74 5f 4c 69 |));.  Cu|rrent_Li|
|000022e0| 6e 65 20 3d 20 28 43 4f | 4c 4f 55 52 20 2a 29 20 |ne = (CO|LOUR *) |
|000022f0| 6d 61 6c 6c 6f 63 20 28 | 73 69 7a 65 6f 66 20 28 |malloc (|sizeof (|
|00002300| 43 4f 4c 4f 55 52 29 2a | 28 46 72 61 6d 65 2e 53 |COLOUR)*|(Frame.S|
|00002310| 63 72 65 65 6e 5f 57 69 | 64 74 68 20 2b 20 31 29 |creen_Wi|dth + 1)|
|00002320| 29 3b 0d 0d 20 20 66 6f | 72 20 28 69 20 3d 20 30 |);..  fo|r (i = 0|
|00002330| 20 3b 20 69 20 3c 3d 20 | 46 72 61 6d 65 2e 53 63 | ; i <= |Frame.Sc|
|00002340| 72 65 65 6e 5f 57 69 64 | 74 68 20 3b 20 69 2b 2b |reen_Wid|th ; i++|
|00002350| 29 20 0d 20 20 20 20 7b | 0d 20 20 20 20 50 72 65 |) .    {|.    Pre|
|00002360| 76 69 6f 75 73 5f 4c 69 | 6e 65 5b 69 5d 2e 52 65 |vious_Li|ne[i].Re|
|00002370| 64 20 3d 20 30 2e 30 3b | 0d 20 20 20 20 50 72 65 |d = 0.0;|.    Pre|
|00002380| 76 69 6f 75 73 5f 4c 69 | 6e 65 5b 69 5d 2e 47 72 |vious_Li|ne[i].Gr|
|00002390| 65 65 6e 20 3d 20 30 2e | 30 3b 0d 20 20 20 20 50 |een = 0.|0;.    P|
|000023a0| 72 65 76 69 6f 75 73 5f | 4c 69 6e 65 5b 69 5d 2e |revious_|Line[i].|
|000023b0| 42 6c 75 65 20 3d 20 30 | 2e 30 3b 0d 20 20 20 20 |Blue = 0|.0;.    |
|000023c0| 43 75 72 72 65 6e 74 5f | 4c 69 6e 65 5b 69 5d 2e |Current_|Line[i].|
|000023d0| 52 65 64 20 3d 20 30 2e | 30 3b 0d 20 20 20 20 43 |Red = 0.|0;.    C|
|000023e0| 75 72 72 65 6e 74 5f 4c | 69 6e 65 5b 69 5d 2e 47 |urrent_L|ine[i].G|
|000023f0| 72 65 65 6e 20 3d 20 30 | 2e 30 3b 0d 20 20 20 20 |reen = 0|.0;.    |
|00002400| 43 75 72 72 65 6e 74 5f | 4c 69 6e 65 5b 69 5d 2e |Current_|Line[i].|
|00002410| 42 6c 75 65 20 3d 20 30 | 2e 30 3b 0d 20 20 20 20 |Blue = 0|.0;.    |
|00002420| 7d 0d 0d 20 20 69 66 20 | 28 4f 70 74 69 6f 6e 73 |}..  if |(Options|
|00002430| 20 26 20 41 4e 54 49 41 | 4c 49 41 53 29 20 0d 20 | & ANTIA|LIAS) . |
|00002440| 20 20 20 7b 0d 20 20 20 | 20 50 72 65 76 69 6f 75 |   {.   | Previou|
|00002450| 73 5f 4c 69 6e 65 5f 41 | 6e 74 69 61 6c 69 61 73 |s_Line_A|ntialias|
|00002460| 65 64 5f 46 6c 61 67 73 | 20 3d 0d 20 20 20 20 28 |ed_Flags| =.    (|
|00002470| 63 68 61 72 20 2a 29 20 | 6d 61 6c 6c 6f 63 20 28 |char *) |malloc (|
|00002480| 73 69 7a 65 6f 66 20 28 | 63 68 61 72 29 2a 28 46 |sizeof (|char)*(F|
|00002490| 72 61 6d 65 2e 53 63 72 | 65 65 6e 5f 57 69 64 74 |rame.Scr|een_Widt|
|000024a0| 68 20 2b 20 31 29 29 3b | 0d 20 20 20 20 43 75 72 |h + 1));|.    Cur|
|000024b0| 72 65 6e 74 5f 4c 69 6e | 65 5f 41 6e 74 69 61 6c |rent_Lin|e_Antial|
|000024c0| 69 61 73 65 64 5f 46 6c | 61 67 73 20 3d 0d 20 20 |iased_Fl|ags =.  |
|000024d0| 20 20 28 63 68 61 72 20 | 2a 29 20 20 6d 61 6c 6c |  (char |*)  mall|
|000024e0| 6f 63 20 28 73 69 7a 65 | 6f 66 20 28 63 68 61 72 |oc (size|of (char|
|000024f0| 29 2a 28 46 72 61 6d 65 | 2e 53 63 72 65 65 6e 5f |)*(Frame|.Screen_|
|00002500| 57 69 64 74 68 20 2b 20 | 31 29 29 3b 0d 0d 20 20 |Width + |1));..  |
|00002510| 20 20 66 6f 72 20 28 69 | 20 3d 20 30 20 3b 20 69 |  for (i| = 0 ; i|
|00002520| 20 3c 3d 20 46 72 61 6d | 65 2e 53 63 72 65 65 6e | <= Fram|e.Screen|
|00002530| 5f 57 69 64 74 68 20 3b | 20 69 2b 2b 29 20 0d 20 |_Width ;| i++) . |
|00002540| 20 20 20 20 20 7b 0d 20 | 20 20 20 20 20 28 50 72 |     {. |     (Pr|
|00002550| 65 76 69 6f 75 73 5f 4c | 69 6e 65 5f 41 6e 74 69 |evious_L|ine_Anti|
|00002560| 61 6c 69 61 73 65 64 5f | 46 6c 61 67 73 29 5b 69 |aliased_|Flags)[i|
|00002570| 5d 20 3d 20 30 3b 0d 20 | 20 20 20 20 20 28 43 75 |] = 0;. |     (Cu|
|00002580| 72 72 65 6e 74 5f 4c 69 | 6e 65 5f 41 6e 74 69 61 |rrent_Li|ne_Antia|
|00002590| 6c 69 61 73 65 64 5f 46 | 6c 61 67 73 29 5b 69 5d |liased_F|lags)[i]|
|000025a0| 20 3d 20 30 3b 0d 20 20 | 20 20 20 20 7d 0d 20 20 | = 0;.  |    }.  |
|000025b0| 20 20 7d 0d 0d 20 20 52 | 61 79 2e 49 6e 69 74 69 |  }..  R|ay.Initi|
|000025c0| 61 6c 20 3d 20 46 72 61 | 6d 65 2e 43 61 6d 65 72 |al = Fra|me.Camer|
|000025d0| 61 2d 3e 4c 6f 63 61 74 | 69 6f 6e 3b 0d 20 20 72 |a->Locat|ion;.  r|
|000025e0| 65 74 75 72 6e 3b 0d 20 | 20 7d 0d 0d 73 74 61 74 |eturn;. | }..stat|
|000025f0| 69 63 20 76 6f 69 64 20 | 6f 75 74 70 75 74 5f 6c |ic void |output_l|
|00002600| 69 6e 65 20 28 79 29 0d | 72 65 67 69 73 74 65 72 |ine (y).|register|
|00002610| 20 69 6e 74 20 79 3b 0d | 20 20 7b 0d 20 20 43 4f | int y;.|  {.  CO|
|00002620| 4c 4f 55 52 20 2a 54 65 | 6d 70 5f 43 6f 6c 6f 75 |LOUR *Te|mp_Colou|
|00002630| 72 5f 50 74 72 3b 0d 20 | 20 63 68 61 72 20 2a 54 |r_Ptr;. | char *T|
|00002640| 65 6d 70 5f 43 68 61 72 | 5f 50 74 72 3b 0d 0d 20 |emp_Char|_Ptr;.. |
|00002650| 20 69 66 20 28 4f 70 74 | 69 6f 6e 73 20 26 20 44 | if (Opt|ions & D|
|00002660| 49 53 4b 57 52 49 54 45 | 29 0d 20 20 20 20 69 66 |ISKWRITE|).    if|
|00002670| 20 28 79 20 3e 20 46 69 | 72 73 74 5f 4c 69 6e 65 | (y > Fi|rst_Line|
|00002680| 29 20 0d 20 20 20 20 7b | 0d 20 20 20 20 57 72 69 |) .    {|.    Wri|
|00002690| 74 65 5f 4c 69 6e 65 20 | 28 4f 75 74 70 75 74 5f |te_Line |(Output_|
|000026a0| 46 69 6c 65 5f 48 61 6e | 64 6c 65 2c 20 50 72 65 |File_Han|dle, Pre|
|000026b0| 76 69 6f 75 73 5f 4c 69 | 6e 65 2c 20 79 2d 31 29 |vious_Li|ne, y-1)|
|000026c0| 3b 0d 20 20 20 20 7d 0d | 0d 20 20 69 66 20 28 4f |;.    }.|.  if (O|
|000026d0| 70 74 69 6f 6e 73 20 26 | 20 56 45 52 42 4f 53 45 |ptions &| VERBOSE|
|000026e0| 29 0d 20 20 20 20 7b 0d | 20 20 20 20 69 66 20 28 |).    {.|    if (|
|000026f0| 4f 70 74 69 6f 6e 73 20 | 26 20 41 4e 54 49 41 4c |Options |& ANTIAL|
|00002700| 49 41 53 20 26 26 20 56 | 65 72 62 6f 73 65 46 6f |IAS && V|erboseFo|
|00002710| 72 6d 61 74 20 21 3d 20 | 27 31 27 29 0d 20 20 20 |rmat != |'1').   |
|00002720| 20 20 20 70 72 69 6e 74 | 66 20 28 22 20 73 75 70 |   print|f (" sup|
|00002730| 65 72 73 61 6d 70 6c 65 | 64 20 25 64 20 74 69 6d |ersample|d %d tim|
|00002740| 65 73 2e 22 2c 20 53 75 | 70 65 72 53 61 6d 70 6c |es.", Su|perSampl|
|00002750| 65 43 6f 75 6e 74 29 3b | 0d 0d 20 20 20 20 69 66 |eCount);|..    if|
|00002760| 20 28 4f 70 74 69 6f 6e | 73 20 26 20 41 4e 54 49 | (Option|s & ANTI|
|00002770| 41 4c 49 41 53 20 26 26 | 20 56 65 72 62 6f 73 65 |ALIAS &&| Verbose|
|00002780| 46 6f 72 6d 61 74 20 3d | 3d 20 27 31 27 29 0d 20 |Format =|= '1'). |
|00002790| 20 20 20 20 20 7b 0d 20 | 20 20 20 20 20 66 70 72 |     {. |     fpr|
|000027a0| 69 6e 74 66 20 28 73 74 | 64 65 72 72 2c 22 20 73 |intf (st|derr," s|
|000027b0| 75 70 65 72 73 61 6d 70 | 6c 65 64 20 25 64 20 74 |upersamp|led %d t|
|000027c0| 69 6d 65 73 2e 22 2c 20 | 53 75 70 65 72 53 61 6d |imes.", |SuperSam|
|000027d0| 70 6c 65 43 6f 75 6e 74 | 29 3b 0d 0d 20 20 20 20 |pleCount|);..    |
|000027e0| 20 20 7d 0d 20 20 20 20 | 69 66 20 28 56 65 72 62 |  }.    |if (Verb|
|000027f0| 6f 73 65 46 6f 72 6d 61 | 74 20 3d 3d 20 27 31 27 |oseForma|t == '1'|
|00002800| 29 0d 20 20 20 20 20 20 | 66 70 72 69 6e 74 66 20 |).      |fprintf |
|00002810| 28 73 74 64 65 72 72 2c | 22 5c 72 22 29 3b 0d 20 |(stderr,|"\r");. |
|00002820| 20 20 20 65 6c 73 65 0d | 20 20 20 20 20 20 66 70 |   else.|      fp|
|00002830| 72 69 6e 74 66 20 28 73 | 74 64 65 72 72 2c 22 5c |rintf (s|tderr,"\|
|00002840| 6e 22 29 3b 0d 20 20 20 | 20 7d 0d 20 20 54 65 6d |n");.   | }.  Tem|
|00002850| 70 5f 43 6f 6c 6f 75 72 | 5f 50 74 72 20 3d 20 50 |p_Colour|_Ptr = P|
|00002860| 72 65 76 69 6f 75 73 5f | 4c 69 6e 65 3b 0d 20 20 |revious_|Line;.  |
|00002870| 50 72 65 76 69 6f 75 73 | 5f 4c 69 6e 65 20 3d 20 |Previous|_Line = |
|00002880| 43 75 72 72 65 6e 74 5f | 4c 69 6e 65 3b 0d 20 20 |Current_|Line;.  |
|00002890| 43 75 72 72 65 6e 74 5f | 4c 69 6e 65 20 3d 20 54 |Current_|Line = T|
|000028a0| 65 6d 70 5f 43 6f 6c 6f | 75 72 5f 50 74 72 3b 0d |emp_Colo|ur_Ptr;.|
|000028b0| 0d 20 20 54 65 6d 70 5f | 43 68 61 72 5f 50 74 72 |.  Temp_|Char_Ptr|
|000028c0| 20 3d 20 50 72 65 76 69 | 6f 75 73 5f 4c 69 6e 65 | = Previ|ous_Line|
|000028d0| 5f 41 6e 74 69 61 6c 69 | 61 73 65 64 5f 46 6c 61 |_Antiali|ased_Fla|
|000028e0| 67 73 3b 0d 20 20 50 72 | 65 76 69 6f 75 73 5f 4c |gs;.  Pr|evious_L|
|000028f0| 69 6e 65 5f 41 6e 74 69 | 61 6c 69 61 73 65 64 5f |ine_Anti|aliased_|
|00002900| 46 6c 61 67 73 20 3d 20 | 43 75 72 72 65 6e 74 5f |Flags = |Current_|
|00002910| 4c 69 6e 65 5f 41 6e 74 | 69 61 6c 69 61 73 65 64 |Line_Ant|ialiased|
|00002920| 5f 46 6c 61 67 73 3b 0d | 20 20 43 75 72 72 65 6e |_Flags;.|  Curren|
|00002930| 74 5f 4c 69 6e 65 5f 41 | 6e 74 69 61 6c 69 61 73 |t_Line_A|ntialias|
|00002940| 65 64 5f 46 6c 61 67 73 | 20 3d 20 54 65 6d 70 5f |ed_Flags| = Temp_|
|00002950| 43 68 61 72 5f 50 74 72 | 3b 0d 0d 20 20 72 65 74 |Char_Ptr|;..  ret|
|00002960| 75 72 6e 3b 0d 20 20 7d | 0d 0d 76 6f 69 64 20 54 |urn;.  }|..void T|
|00002970| 72 61 63 65 20 28 52 61 | 79 2c 20 43 6f 6c 6f 75 |race (Ra|y, Colou|
|00002980| 72 29 0d 52 41 59 20 2a | 52 61 79 3b 0d 43 4f 4c |r).RAY *|Ray;.COL|
|00002990| 4f 55 52 20 2a 43 6f 6c | 6f 75 72 3b 0d 20 20 7b |OUR *Col|our;.  {|
|000029a0| 0d 20 20 4f 42 4a 45 43 | 54 20 2a 4f 62 6a 65 63 |.  OBJEC|T *Objec|
|000029b0| 74 3b 0d 20 20 49 4e 54 | 45 52 53 45 43 54 49 4f |t;.  INT|ERSECTIO|
|000029c0| 4e 20 42 65 73 74 5f 49 | 6e 74 65 72 73 65 63 74 |N Best_I|ntersect|
|000029d0| 69 6f 6e 2c 20 4e 65 77 | 5f 49 6e 74 65 72 73 65 |ion, New|_Interse|
|000029e0| 63 74 69 6f 6e 3b 0d 20 | 20 72 65 67 69 73 74 65 |ction;. | registe|
|000029f0| 72 20 69 6e 74 20 49 6e | 74 65 72 73 65 63 74 69 |r int In|tersecti|
|00002a00| 6f 6e 5f 46 6f 75 6e 64 | 3b 0d 0d 20 20 43 4f 4f |on_Found|;..  COO|
|00002a10| 50 45 52 41 54 45 0d 20 | 20 4e 75 6d 62 65 72 5f |PERATE. | Number_|
|00002a20| 4f 66 5f 52 61 79 73 2b | 2b 3b 0d 20 20 4d 61 6b |Of_Rays+|+;.  Mak|
|00002a30| 65 5f 43 6f 6c 6f 75 72 | 20 28 43 6f 6c 6f 75 72 |e_Colour| (Colour|
|00002a40| 2c 20 30 2e 30 2c 20 30 | 2e 30 2c 20 30 2e 30 29 |, 0.0, 0|.0, 0.0)|
|00002a50| 3b 0d 0d 20 20 69 66 20 | 28 54 72 61 63 65 5f 4c |;..  if |(Trace_L|
|00002a60| 65 76 65 6c 20 3e 20 28 | 69 6e 74 29 20 4d 61 78 |evel > (|int) Max|
|00002a70| 5f 54 72 61 63 65 5f 4c | 65 76 65 6c 29 20 0d 20 |_Trace_L|evel) . |
|00002a80| 20 20 20 72 65 74 75 72 | 6e 3b 0d 0d 20 20 49 6e |   retur|n;..  In|
|00002a90| 74 65 72 73 65 63 74 69 | 6f 6e 5f 46 6f 75 6e 64 |tersecti|on_Found|
|00002aa0| 20 3d 20 46 41 4c 53 45 | 3b 0d 20 20 42 65 73 74 | = FALSE|;.  Best|
|00002ab0| 5f 49 6e 74 65 72 73 65 | 63 74 69 6f 6e 2e 44 65 |_Interse|ction.De|
|00002ac0| 70 74 68 20 3d 20 42 4f | 55 4e 44 5f 48 55 47 45 |pth = BO|UND_HUGE|
|00002ad0| 3b 0d 0d 20 20 20 20 2f | 2a 20 57 68 61 74 20 6f |;..    /|* What o|
|00002ae0| 62 6a 65 63 74 73 20 64 | 6f 65 73 20 74 68 69 73 |bjects d|oes this|
|00002af0| 20 72 61 79 20 69 6e 74 | 65 72 73 65 63 74 3f 20 | ray int|ersect? |
|00002b00| 2a 2f 0d 20 20 69 66 20 | 28 21 55 73 65 5f 53 6c |*/.  if |(!Use_Sl|
|00002b10| 61 62 73 29 0d 20 20 20 | 20 66 6f 72 20 28 4f 62 |abs).   | for (Ob|
|00002b20| 6a 65 63 74 20 3d 20 46 | 72 61 6d 65 2e 4f 62 6a |ject = F|rame.Obj|
|00002b30| 65 63 74 73 20 3b 20 0d | 20 20 20 20 20 20 20 20 |ects ; .|        |
|00002b40| 20 4f 62 6a 65 63 74 20 | 21 3d 20 4e 55 4c 4c 20 | Object |!= NULL |
|00002b50| 3b 0d 20 20 20 20 20 20 | 20 20 20 4f 62 6a 65 63 |;.      |   Objec|
|00002b60| 74 20 3d 20 4f 62 6a 65 | 63 74 20 2d 3e 20 53 69 |t = Obje|ct -> Si|
|00002b70| 62 6c 69 6e 67 29 20 0d | 20 20 20 20 7b 0d 20 20 |bling) .|    {.  |
|00002b80| 20 20 69 66 20 28 49 6e | 74 65 72 73 65 63 74 69 |  if (In|tersecti|
|00002b90| 6f 6e 20 28 26 4e 65 77 | 5f 49 6e 74 65 72 73 65 |on (&New|_Interse|
|00002ba0| 63 74 69 6f 6e 2c 20 4f | 62 6a 65 63 74 2c 20 52 |ction, O|bject, R|
|00002bb0| 61 79 29 29 0d 20 20 20 | 20 20 20 69 66 20 28 4e |ay)).   |   if (N|
|00002bc0| 65 77 5f 49 6e 74 65 72 | 73 65 63 74 69 6f 6e 2e |ew_Inter|section.|
|00002bd0| 44 65 70 74 68 20 3c 20 | 42 65 73 74 5f 49 6e 74 |Depth < |Best_Int|
|00002be0| 65 72 73 65 63 74 69 6f | 6e 2e 44 65 70 74 68 29 |ersectio|n.Depth)|
|00002bf0| 20 0d 20 20 20 20 20 20 | 20 20 7b 0d 20 20 20 20 | .      |  {.    |
|00002c00| 20 20 20 20 42 65 73 74 | 5f 49 6e 74 65 72 73 65 |    Best|_Interse|
|00002c10| 63 74 69 6f 6e 20 3d 20 | 4e 65 77 5f 49 6e 74 65 |ction = |New_Inte|
|00002c20| 72 73 65 63 74 69 6f 6e | 3b 0d 20 20 20 20 20 20 |rsection|;.      |
|00002c30| 20 20 49 6e 74 65 72 73 | 65 63 74 69 6f 6e 5f 46 |  Inters|ection_F|
|00002c40| 6f 75 6e 64 20 3d 20 54 | 52 55 45 3b 0d 20 20 20 |ound = T|RUE;.   |
|00002c50| 20 20 20 20 20 7d 0d 20 | 20 20 20 7d 0d 20 20 65 |     }. |   }.  e|
|00002c60| 6c 73 65 0d 20 20 20 20 | 49 6e 74 65 72 73 65 63 |lse.    |Intersec|
|00002c70| 74 69 6f 6e 5f 46 6f 75 | 6e 64 20 3d 20 42 6f 75 |tion_Fou|nd = Bou|
|00002c80| 6e 64 73 5f 49 6e 74 65 | 72 73 65 63 74 28 52 6f |nds_Inte|rsect(Ro|
|00002c90| 6f 74 5f 4f 62 6a 65 63 | 74 2c 20 52 61 79 2c 0d |ot_Objec|t, Ray,.|
|00002ca0| 20 20 20 20 20 20 26 42 | 65 73 74 5f 49 6e 74 65 |      &B|est_Inte|
|00002cb0| 72 73 65 63 74 69 6f 6e | 2c 26 4f 62 6a 65 63 74 |rsection|,&Object|
|00002cc0| 29 3b 0d 0d 20 20 69 66 | 20 28 49 6e 74 65 72 73 |);..  if| (Inters|
|00002cd0| 65 63 74 69 6f 6e 5f 46 | 6f 75 6e 64 29 0d 20 20 |ection_F|ound).  |
|00002ce0| 20 20 44 65 74 65 72 6d | 69 6e 65 5f 41 70 70 61 |  Determ|ine_Appa|
|00002cf0| 72 65 6e 74 5f 43 6f 6c | 6f 75 72 20 28 26 42 65 |rent_Col|our (&Be|
|00002d00| 73 74 5f 49 6e 74 65 72 | 73 65 63 74 69 6f 6e 2c |st_Inter|section,|
|00002d10| 20 43 6f 6c 6f 75 72 2c | 20 52 61 79 29 3b 0d 20 | Colour,| Ray);. |
|00002d20| 20 65 6c 73 65 0d 20 20 | 20 20 69 66 20 28 46 72 | else.  |  if (Fr|
|00002d30| 61 6d 65 2e 46 6f 67 5f | 44 69 73 74 61 6e 63 65 |ame.Fog_|Distance|
|00002d40| 20 3e 20 30 2e 30 29 0d | 20 20 20 20 20 20 2a 43 | > 0.0).|      *C|
|00002d50| 6f 6c 6f 75 72 20 3d 20 | 46 72 61 6d 65 2e 46 6f |olour = |Frame.Fo|
|00002d60| 67 5f 43 6f 6c 6f 75 72 | 3b 0d 20 20 20 20 65 6c |g_Colour|;.    el|
|00002d70| 73 65 0d 20 20 20 20 20 | 20 2a 43 6f 6c 6f 75 72 |se.     | *Colour|
|00002d80| 20 3d 20 46 72 61 6d 65 | 2e 42 61 63 6b 67 72 6f | = Frame|.Backgro|
|00002d90| 75 6e 64 5f 43 6f 6c 6f | 75 72 3b 0d 20 20 7d 0d |und_Colo|ur;.  }.|
|00002da0| 0d 2f 2a 20 65 78 69 74 | 20 77 69 74 68 20 65 72 |./* exit| with er|
|00002db0| 72 6f 72 20 69 66 20 69 | 6d 61 67 65 20 6e 6f 74 |ror if i|mage not|
|00002dc0| 20 63 6f 6d 70 6c 65 74 | 65 64 2f 75 73 65 72 20 | complet|ed/user |
|00002dd0| 61 62 6f 72 74 2a 2f 0d | 76 6f 69 64 20 43 68 65 |abort*/.|void Che|
|00002de0| 63 6b 5f 55 73 65 72 5f | 41 62 6f 72 74 20 28 44 |ck_User_|Abort (D|
|00002df0| 6f 5f 53 74 61 74 73 29 | 0d 69 6e 74 20 44 6f 5f |o_Stats)|.int Do_|
|00002e00| 53 74 61 74 73 3b 0d 20 | 20 7b 0d 20 20 54 45 53 |Stats;. | {.  TES|
|00002e10| 54 5f 41 42 4f 52 54 0d | 20 20 69 66 20 28 53 74 |T_ABORT.|  if (St|
|00002e20| 6f 70 5f 46 6c 61 67 29 | 20 0d 20 20 20 20 7b 0d |op_Flag)| .    {.|
|00002e30| 20 20 20 20 63 6c 6f 73 | 65 5f 61 6c 6c 28 29 3b |    clos|e_all();|
|00002e40| 0d 20 20 20 20 69 66 20 | 28 44 6f 5f 53 74 61 74 |.    if |(Do_Stat|
|00002e50| 73 29 0d 20 20 20 20 20 | 20 7b 0d 20 20 20 20 20 |s).     | {.     |
|00002e60| 20 50 52 49 4e 54 5f 53 | 54 41 54 53 0d 20 20 20 | PRINT_S|TATS.   |
|00002e70| 20 20 20 7d 0d 20 20 20 | 20 65 78 69 74 28 32 29 |   }.   | exit(2)|
|00002e80| 3b 0d 20 20 20 20 7d 0d | 20 20 7d 0d 0d 2f 2a 2d |;.    }.|  }../*-|
|00002e90| 2d 2d 2d 2d 2d 2d 2d 2d | 2d 2d 2d 2d 2d 2d 20 20 |--------|------  |
|00002ea0| 53 74 61 6e 64 61 72 64 | 20 73 61 6d 70 6c 69 6e |Standard| samplin|
|00002eb0| 67 20 69 6e 20 6c 6f 6f | 70 20 20 2d 2d 2d 2d 2d |g in loo|p  -----|
|00002ec0| 2d 2d 2d 2d 2d 2d 2d 2d | 2d 2d 2d 2d 2d 2d 2d 2d |--------|--------|
|00002ed0| 2d 2d 2a 2f 0d 0d 75 6e | 73 69 67 6e 65 64 20 73 |--*/..un|signed s|
|00002ee0| 68 6f 72 74 20 4a 52 61 | 6e 67 65 73 5b 5d 20 3d |hort JRa|nges[] =|
|00002ef0| 20 7b 31 2c 31 2c 31 2c | 31 2c 33 2c 32 2c 35 2c | {1,1,1,|1,3,2,5,|
|00002f00| 33 2c 37 2c 34 7d 3b 20 | 2f 2a 20 4c 53 4b 20 2a |3,7,4}; |/* LSK *|
|00002f10| 2f 0d 0d 76 6f 69 64 20 | 53 75 70 65 72 73 61 6d |/..void |Supersam|
|00002f20| 70 6c 65 20 28 72 65 73 | 75 6c 74 2c 20 78 2c 20 |ple (res|ult, x, |
|00002f30| 79 2c 20 57 69 64 74 68 | 2c 20 48 65 69 67 68 74 |y, Width|, Height|
|00002f40| 29 0d 43 4f 4c 4f 55 52 | 20 2a 72 65 73 75 6c 74 |).COLOUR| *result|
|00002f50| 3b 0d 69 6e 74 20 78 2c | 20 79 2c 20 57 69 64 74 |;.int x,| y, Widt|
|00002f60| 68 2c 20 48 65 69 67 68 | 74 3b 0d 20 20 7b 0d 20 |h, Heigh|t;.  {. |
|00002f70| 20 43 4f 4c 4f 55 52 20 | 63 6f 6c 6f 75 72 3b 0d | COLOUR |colour;.|
|00002f80| 20 20 72 65 67 69 73 74 | 65 72 20 44 42 4c 20 64 |  regist|er DBL d|
|00002f90| 78 2c 20 64 79 2c 20 4a | 69 74 74 65 72 5f 58 2c |x, dy, J|itter_X,|
|00002fa0| 20 4a 69 74 74 65 72 5f | 59 3b 0d 20 20 72 65 67 | Jitter_|Y;.  reg|
|00002fb0| 69 73 74 65 72 20 69 6e | 74 20 4a 69 74 74 5f 4f |ister in|t Jitt_O|
|00002fc0| 66 66 73 65 74 3b 0d 20 | 20 75 6e 73 69 67 6e 65 |ffset;. | unsigne|
|00002fd0| 64 20 63 68 61 72 20 52 | 65 64 2c 20 47 72 65 65 |d char R|ed, Gree|
|00002fe0| 6e 2c 20 42 6c 75 65 3b | 0d 20 20 69 6e 74 20 4a |n, Blue;|.  int J|
|00002ff0| 52 61 6e 67 65 3b 20 20 | 20 20 20 20 20 20 20 20 |Range;  |        |
|00003000| 20 20 20 20 20 20 20 20 | 20 20 20 20 20 20 20 20 |        |        |
|00003010| 20 20 20 20 20 2f 2a 20 | 4c 53 4b 20 2a 2f 0d 20 |     /* |LSK */. |
|00003020| 20 69 6e 74 20 4a 53 74 | 65 70 73 3b 20 20 20 20 | int JSt|eps;    |
|00003030| 20 20 20 20 20 20 20 20 | 20 20 20 20 20 20 20 20 |        |        |
|00003040| 20 20 20 20 20 20 20 20 | 20 20 20 2f 2a 20 4c 53 |        |   /* LS|
|00003050| 4b 20 2a 2f 0d 20 20 44 | 42 4c 20 4a 53 63 61 6c |K */.  D|BL JScal|
|00003060| 65 3b 20 20 20 20 20 20 | 20 20 20 20 20 20 20 20 |e;      |        |
|00003070| 20 20 20 20 20 20 20 20 | 20 20 20 20 20 20 20 20 |        |        |
|00003080| 20 2f 2a 20 4c 53 4b 20 | 2a 2f 0d 20 20 44 42 4c | /* LSK |*/.  DBL|
|00003090| 20 4a 53 69 7a 65 2c 4a | 4f 66 66 73 65 74 3b 20 | JSize,J|Offset; |
|000030a0| 20 20 20 20 20 20 20 20 | 20 20 20 20 20 20 20 20 |        |        |
|000030b0| 20 20 20 20 20 20 20 2f | 2a 20 4c 53 4b 20 2a 2f |       /|* LSK */|
|000030c0| 0d 20 20 69 6e 74 20 69 | 2c 6a 3b 20 20 20 20 20 |.  int i|,j;     |
|000030d0| 20 20 20 20 20 20 20 20 | 20 20 20 20 20 20 20 20 |        |        |
|000030e0| 20 20 20 20 20 20 20 20 | 20 20 20 20 20 2f 2a 20 |        |     /* |
|000030f0| 4c 53 4b 20 2a 2f 0d 0d | 20 20 64 78 20 3d 20 28 |LSK */..|  dx = (|
|00003100| 44 42 4c 29 20 78 3b 20 | 20 20 20 20 20 20 20 20 |DBL) x; |        |
|00003110| 20 20 20 20 20 20 20 20 | 20 20 20 20 20 20 20 20 |        |        |
|00003120| 20 20 20 20 2f 2a 20 4c | 53 4b 20 2a 2f 0d 20 20 |    /* L|SK */.  |
|00003130| 64 79 20 3d 20 28 44 42 | 4c 29 20 79 3b 20 20 20 |dy = (DB|L) y;   |
|00003140| 20 20 20 20 20 20 20 20 | 20 20 20 20 20 20 20 20 |        |        |
|00003150| 20 20 20 20 20 20 20 20 | 20 20 2f 2a 20 4c 53 4b |        |  /* LSK|
|00003160| 20 2a 2f 0d 20 20 4a 69 | 74 74 5f 4f 66 66 73 65 | */.  Ji|tt_Offse|
|00003170| 74 20 3d 20 31 30 3b 0d | 0d 20 20 4e 75 6d 62 65 |t = 10;.|.  Numbe|
|00003180| 72 5f 4f 66 5f 50 69 78 | 65 6c 73 5f 53 75 70 65 |r_Of_Pix|els_Supe|
|00003190| 72 73 61 6d 70 6c 65 64 | 2b 2b 3b 0d 0d 20 20 4d |rsampled|++;..  M|
|000031a0| 61 6b 65 5f 43 6f 6c 6f | 75 72 20 28 72 65 73 75 |ake_Colo|ur (resu|
|000031b0| 6c 74 2c 20 30 2e 30 2c | 20 30 2e 30 2c 20 30 2e |lt, 0.0,| 0.0, 0.|
|000031c0| 30 29 3b 0d 0d 20 20 69 | 66 20 28 41 6e 74 69 61 |0);..  i|f (Antia|
|000031d0| 6c 69 61 73 44 65 70 74 | 68 3e 31 29 20 20 20 20 |liasDept|h>1)    |
|000031e0| 20 20 20 20 20 20 20 20 | 20 20 20 20 20 20 20 20 |        |        |
|000031f0| 20 20 20 20 20 20 20 20 | 20 20 20 20 20 20 20 20 |        |        |
|00003200| 20 20 20 20 20 20 20 2f | 2a 20 4c 53 4b 20 2a 2f |       /|* LSK */|
|00003210| 0d 20 20 20 20 7b 20 20 | 20 20 20 20 20 20 20 20 |.    {  |        |
|00003220| 20 20 20 20 20 20 20 20 | 20 20 20 20 20 20 20 20 |        |        |
|00003230| 20 20 20 20 20 20 20 20 | 20 20 20 20 20 20 20 20 |        |        |
|00003240| 20 20 20 20 20 20 20 20 | 20 20 20 20 20 20 20 20 |        |        |
|00003250| 20 20 20 2f 2a 20 4c 53 | 4b 20 2a 2f 0d 20 20 20 |   /* LS|K */.   |
|00003260| 20 2f 2a 20 4a 53 69 7a | 65 20 69 73 20 74 68 65 | /* JSiz|e is the|
|00003270| 20 73 69 7a 65 20 6f 66 | 20 74 68 65 20 6a 69 74 | size of| the jit|
|00003280| 74 65 72 20 73 63 61 74 | 74 65 72 69 6e 67 20 61 |ter scat|tering a|
|00003290| 72 65 61 20 2a 2f 0d 20 | 20 20 20 4a 53 69 7a 65 |rea */. |   JSize|
|000032a0| 20 3d 20 31 2e 30 2f 41 | 6e 74 69 61 6c 69 61 73 | = 1.0/A|ntialias|
|000032b0| 44 65 70 74 68 3b 20 20 | 20 20 20 20 20 20 20 20 |Depth;  |        |
|000032c0| 20 20 20 20 20 20 20 20 | 20 20 20 20 20 20 20 20 |        |        |
|000032d0| 20 20 20 20 20 20 20 20 | 20 2f 2a 20 4c 53 4b 20 |        | /* LSK |
|000032e0| 2a 2f 0d 0d 20 20 20 20 | 2f 2a 20 4a 4f 66 66 73 |*/..    |/* JOffs|
|000032f0| 65 74 20 69 73 20 74 68 | 65 20 27 72 61 64 69 75 |et is th|e 'radiu|
|00003300| 73 27 20 6f 66 20 74 68 | 65 20 6a 69 74 74 65 72 |s' of th|e jitter|
|00003310| 20 73 63 61 74 74 65 72 | 20 61 72 65 61 20 2a 2f | scatter| area */|
|00003320| 0d 20 20 20 20 4a 4f 66 | 66 73 65 74 20 3d 20 4a |.    JOf|fset = J|
|00003330| 53 69 7a 65 2f 32 2e 30 | 3b 20 20 20 20 20 20 20 |Size/2.0|;       |
|00003340| 20 20 20 20 20 20 20 20 | 20 20 20 20 20 20 20 20 |        |        |
|00003350| 20 20 20 20 20 20 20 20 | 20 20 20 20 20 20 20 20 |        |        |
|00003360| 20 2f 2a 20 4c 53 4b 20 | 2a 2f 0d 0d 20 20 20 20 | /* LSK |*/..    |
|00003370| 2f 2a 20 4a 53 74 65 70 | 73 20 69 73 20 65 69 74 |/* JStep|s is eit|
|00003380| 68 65 72 20 31 20 6f 72 | 20 32 20 64 65 70 65 6e |her 1 or| 2 depen|
|00003390| 64 69 6e 67 20 6f 6e 20 | 77 68 65 74 68 65 72 20 |ding on |whether |
|000033a0| 74 68 65 20 6e 75 6d 62 | 65 72 20 6f 66 20 73 61 |the numb|er of sa|
|000033b0| 6d 70 6c 65 73 0d 20 20 | 20 20 20 20 20 20 69 73 |mples.  |      is|
|000033c0| 20 6f 64 64 20 6f 72 20 | 65 76 65 6e 2e 20 54 68 | odd or |even. Th|
|000033d0| 69 73 20 69 73 20 62 65 | 63 61 75 73 65 20 74 68 |is is be|cause th|
|000033e0| 65 20 6c 6f 6f 70 20 6e | 65 65 64 20 74 6f 20 65 |e loop n|eed to e|
|000033f0| 69 74 68 65 72 20 72 75 | 6e 20 74 68 72 6f 75 67 |ither ru|n throug|
|00003400| 68 0d 20 20 20 20 20 20 | 20 20 6f 72 20 6f 76 65 |h.      |  or ove|
|00003410| 72 20 30 0d 20 20 20 20 | 20 2a 2f 0d 20 20 20 20 |r 0.    | */.    |
|00003420| 4a 53 74 65 70 73 20 3d | 20 32 2d 28 41 6e 74 69 |JSteps =| 2-(Anti|
|00003430| 61 6c 69 61 73 44 65 70 | 74 68 20 25 20 32 29 3b |aliasDep|th % 2);|
|00003440| 20 20 20 20 20 20 20 20 | 20 20 20 20 20 20 20 20 |        |        |
|00003450| 20 20 20 20 20 20 20 20 | 20 20 20 20 20 20 2f 2a |        |      /*|
|00003460| 20 4c 53 4b 20 2a 2f 0d | 0d 20 20 20 20 2f 2a 20 | LSK */.|.    /* |
|00003470| 4a 52 61 6e 67 65 20 69 | 73 20 74 68 65 20 72 61 |JRange i|s the ra|
|00003480| 6e 67 65 20 74 68 61 74 | 20 74 68 65 20 6c 6f 6f |nge that| the loo|
|00003490| 70 20 77 69 6c 6c 20 72 | 75 6e 20 74 68 72 6f 75 |p will r|un throu|
|000034a0| 67 68 2e 20 49 20 63 6f | 75 6c 64 6e 27 74 0d 20 |gh. I co|uldn't. |
|000034b0| 20 20 20 20 20 20 20 63 | 6f 6d 65 20 75 70 20 77 |       c|ome up w|
|000034c0| 69 74 68 20 61 20 66 75 | 6e 63 74 69 6f 6e 20 64 |ith a fu|nction d|
|000034d0| 65 73 63 72 69 62 69 6e | 67 20 74 68 65 20 76 61 |escribin|g the va|
|000034e0| 6c 75 65 73 2c 20 73 6f | 20 49 20 75 73 65 64 20 |lues, so| I used |
|000034f0| 61 6e 20 61 72 72 61 79 | 0d 20 20 20 20 20 20 20 |an array|.       |
|00003500| 20 66 6f 72 20 32 78 32 | 20 75 70 20 74 6f 20 39 | for 2x2| up to 9|
|00003510| 78 39 2e 0d 20 20 20 20 | 20 2a 2f 0d 20 20 20 20 |x9..    | */.    |
|00003520| 4a 52 61 6e 67 65 20 3d | 20 4a 52 61 6e 67 65 73 |JRange =| JRanges|
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+--------+-------------------------+-------------------------+--------+--------+