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+--------+-------------------------+-------------------------+--------+--------+
|00000000| 00 07 50 4f 49 4e 54 2e | 43 00 00 00 00 00 00 00 |..POINT.|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 1e 71 00 | 00 01 ac a8 7d fa cc a8 |......q.|....}...|
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|00000070| 00 00 00 00 00 00 00 00 | 00 00 81 81 d1 79 00 00 |........|.....y..|
|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 |********|********|
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|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 70 |        |       p|
|000000e0| 6f 69 6e 74 2e 63 0d 2a | 0d 2a 20 20 54 68 69 73 |oint.c.*|.*  This|
|000000f0| 20 6d 6f 64 75 6c 65 20 | 69 6d 70 6c 65 6d 65 6e | module |implemen|
|00000100| 74 73 20 74 68 65 20 70 | 6f 69 6e 74 20 26 20 73 |ts the p|oint & s|
|00000110| 70 6f 74 20 6c 69 67 68 | 74 20 73 6f 75 72 63 65 |pot ligh|t source|
|00000120| 20 70 72 69 6d 69 74 69 | 76 65 2e 0d 2a 0d 2a 20 | primiti|ve..*.* |
|00000130| 20 66 72 6f 6d 20 50 65 | 72 73 69 73 74 65 6e 63 | from Pe|rsistenc|
|00000140| 65 20 6f 66 20 56 69 73 | 69 6f 6e 20 52 61 79 74 |e of Vis|ion Rayt|
|00000150| 72 61 63 65 72 0d 2a 20 | 20 43 6f 70 79 72 69 67 |racer.* | Copyrig|
|00000160| 68 74 20 31 39 39 33 20 | 50 65 72 73 69 73 74 65 |ht 1993 |Persiste|
|00000170| 6e 63 65 20 6f 66 20 56 | 69 73 69 6f 6e 20 54 65 |nce of V|ision Te|
|00000180| 61 6d 0d 2a 2d 2d 2d 2d | 2d 2d 2d 2d 2d 2d 2d 2d |am.*----|--------|
|00000190| 2d 2d 2d 2d 2d 2d 2d 2d | 2d 2d 2d 2d 2d 2d 2d 2d |--------|--------|
|000001a0| 2d 2d 2d 2d 2d 2d 2d 2d | 2d 2d 2d 2d 2d 2d 2d 2d |--------|--------|
|000001b0| 2d 2d 2d 2d 2d 2d 2d 2d | 2d 2d 2d 2d 2d 2d 2d 2d |--------|--------|
|000001c0| 2d 2d 2d 2d 2d 2d 2d 2d | 2d 2d 2d 2d 2d 2d 2d 0d |--------|-------.|
|000001d0| 2a 20 20 4e 4f 54 49 43 | 45 3a 20 54 68 69 73 20 |*  NOTIC|E: This |
|000001e0| 73 6f 75 72 63 65 20 63 | 6f 64 65 20 66 69 6c 65 |source c|ode file|
|000001f0| 20 69 73 20 70 72 6f 76 | 69 64 65 64 20 73 6f 20 | is prov|ided so |
|00000200| 74 68 61 74 20 75 73 65 | 72 73 20 6d 61 79 20 65 |that use|rs may e|
|00000210| 78 70 65 72 69 6d 65 6e | 74 0d 2a 20 20 77 69 74 |xperimen|t.*  wit|
|00000220| 68 20 65 6e 68 61 6e 63 | 65 6d 65 6e 74 73 20 74 |h enhanc|ements t|
|00000230| 6f 20 50 4f 56 2d 52 61 | 79 20 61 6e 64 20 74 6f |o POV-Ra|y and to|
|00000240| 20 70 6f 72 74 20 74 68 | 65 20 73 6f 66 74 77 61 | port th|e softwa|
|00000250| 72 65 20 74 6f 20 70 6c | 61 74 66 6f 72 6d 73 20 |re to pl|atforms |
|00000260| 6f 74 68 65 72 20 0d 2a | 20 20 74 68 61 6e 20 74 |other .*|  than t|
|00000270| 68 6f 73 65 20 73 75 70 | 70 6f 72 74 65 64 20 62 |hose sup|ported b|
|00000280| 79 20 74 68 65 20 50 4f | 56 2d 52 61 79 20 54 65 |y the PO|V-Ray Te|
|00000290| 61 6d 2e 20 20 54 68 65 | 72 65 20 61 72 65 20 73 |am.  The|re are s|
|000002a0| 74 72 69 63 74 20 72 75 | 6c 65 73 20 75 6e 64 65 |trict ru|les unde|
|000002b0| 72 0d 2a 20 20 77 68 69 | 63 68 20 79 6f 75 20 61 |r.*  whi|ch you a|
|000002c0| 72 65 20 70 65 72 6d 69 | 74 74 65 64 20 74 6f 20 |re permi|tted to |
|000002d0| 75 73 65 20 74 68 69 73 | 20 66 69 6c 65 2e 20 20 |use this| file.  |
|000002e0| 54 68 65 20 72 75 6c 65 | 73 20 61 72 65 20 69 6e |The rule|s are in|
|000002f0| 20 74 68 65 20 66 69 6c | 65 0d 2a 20 20 6e 61 6d | the fil|e.*  nam|
|00000300| 65 64 20 50 4f 56 4c 45 | 47 41 4c 2e 44 4f 43 20 |ed POVLE|GAL.DOC |
|00000310| 77 68 69 63 68 20 73 68 | 6f 75 6c 64 20 62 65 20 |which sh|ould be |
|00000320| 64 69 73 74 72 69 62 75 | 74 65 64 20 77 69 74 68 |distribu|ted with|
|00000330| 20 74 68 69 73 20 66 69 | 6c 65 2e 20 49 66 20 0d | this fi|le. If .|
|00000340| 2a 20 20 50 4f 56 4c 45 | 47 41 4c 2e 44 4f 43 20 |*  POVLE|GAL.DOC |
|00000350| 69 73 20 6e 6f 74 20 61 | 76 61 69 6c 61 62 6c 65 |is not a|vailable|
|00000360| 20 6f 72 20 66 6f 72 20 | 6d 6f 72 65 20 69 6e 66 | or for |more inf|
|00000370| 6f 20 70 6c 65 61 73 65 | 20 63 6f 6e 74 61 63 74 |o please| contact|
|00000380| 20 74 68 65 20 50 4f 56 | 2d 52 61 79 0d 2a 20 20 | the POV|-Ray.*  |
|00000390| 54 65 61 6d 20 43 6f 6f | 72 64 69 6e 61 74 6f 72 |Team Coo|rdinator|
|000003a0| 20 62 79 20 6c 65 61 76 | 69 6e 67 20 61 20 6d 65 | by leav|ing a me|
|000003b0| 73 73 61 67 65 20 69 6e | 20 43 6f 6d 70 75 53 65 |ssage in| CompuSe|
|000003c0| 72 76 65 27 73 20 47 72 | 61 70 68 69 63 73 20 44 |rve's Gr|aphics D|
|000003d0| 65 76 65 6c 6f 70 65 72 | 27 73 0d 2a 20 20 46 6f |eveloper|'s.*  Fo|
|000003e0| 72 75 6d 2e 20 20 54 68 | 65 20 6c 61 74 65 73 74 |rum.  Th|e latest|
|000003f0| 20 76 65 72 73 69 6f 6e | 20 6f 66 20 50 4f 56 2d | version| of POV-|
|00000400| 52 61 79 20 6d 61 79 20 | 62 65 20 66 6f 75 6e 64 |Ray may |be found|
|00000410| 20 74 68 65 72 65 20 61 | 73 20 77 65 6c 6c 2e 0d | there a|s well..|
|00000420| 2a 0d 2a 20 54 68 69 73 | 20 70 72 6f 67 72 61 6d |*.* This| program|
|00000430| 20 69 73 20 62 61 73 65 | 64 20 6f 6e 20 74 68 65 | is base|d on the|
|00000440| 20 70 6f 70 75 6c 61 72 | 20 44 4b 42 20 72 61 79 | popular| DKB ray|
|00000450| 74 72 61 63 65 72 20 76 | 65 72 73 69 6f 6e 20 32 |tracer v|ersion 2|
|00000460| 2e 31 32 2e 0d 2a 20 44 | 4b 42 54 72 61 63 65 20 |.12..* D|KBTrace |
|00000470| 77 61 73 20 6f 72 69 67 | 69 6e 61 6c 6c 79 20 77 |was orig|inally w|
|00000480| 72 69 74 74 65 6e 20 62 | 79 20 44 61 76 69 64 20 |ritten b|y David |
|00000490| 4b 2e 20 42 75 63 6b 2e | 0d 2a 20 44 4b 42 54 72 |K. Buck.|.* DKBTr|
|000004a0| 61 63 65 20 56 65 72 20 | 32 2e 30 2d 32 2e 31 32 |ace Ver |2.0-2.12|
|000004b0| 20 77 65 72 65 20 77 72 | 69 74 74 65 6e 20 62 79 | were wr|itten by|
|000004c0| 20 44 61 76 69 64 20 4b | 2e 20 42 75 63 6b 20 26 | David K|. Buck &|
|000004d0| 20 41 61 72 6f 6e 20 41 | 2e 20 43 6f 6c 6c 69 6e | Aaron A|. Collin|
|000004e0| 73 2e 0d 2a 0d 2a 2a 2a | 2a 2a 2a 2a 2a 2a 2a 2a |s..*.***|********|
|000004f0| 2a 2a 2a 2a 2a 2a 2a 2a | 2a 2a 2a 2a 2a 2a 2a 2a |********|********|
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|00000510| 2a 2a 2a 2a 2a 2a 2a 2a | 2a 2a 2a 2a 2a 2a 2a 2a |********|********|
|00000520| 2a 2a 2a 2a 2a 2a 2a 2a | 2a 2a 2a 2a 2a 2a 2a 2a |********|********|
|00000530| 2a 2a 2f 0d 0d 23 69 6e | 63 6c 75 64 65 20 22 66 |**/..#in|clude "f|
|00000540| 72 61 6d 65 2e 68 22 0d | 23 69 6e 63 6c 75 64 65 |rame.h".|#include|
|00000550| 20 22 76 65 63 74 6f 72 | 2e 68 22 0d 23 69 6e 63 | "vector|.h".#inc|
|00000560| 6c 75 64 65 20 22 70 6f | 76 70 72 6f 74 6f 2e 68 |lude "po|vproto.h|
|00000570| 22 0d 0d 4d 45 54 48 4f | 44 53 20 4c 69 67 68 74 |"..METHO|DS Light|
|00000580| 5f 53 6f 75 72 63 65 5f | 4d 65 74 68 6f 64 73 20 |_Source_|Methods |
|00000590| 3d 0d 20 20 7b 20 0d 20 | 20 41 6c 6c 5f 4c 69 67 |=.  { . | All_Lig|
|000005a0| 68 74 5f 53 6f 75 72 63 | 65 5f 49 6e 74 65 72 73 |ht_Sourc|e_Inters|
|000005b0| 65 63 74 69 6f 6e 73 2c | 0d 20 20 49 6e 73 69 64 |ections,|.  Insid|
|000005c0| 65 5f 4c 69 67 68 74 5f | 53 6f 75 72 63 65 2c 20 |e_Light_|Source, |
|000005d0| 4c 69 67 68 74 5f 53 6f | 75 72 63 65 5f 4e 6f 72 |Light_So|urce_Nor|
|000005e0| 6d 61 6c 2c 0d 20 20 43 | 6f 70 79 5f 4c 69 67 68 |mal,.  C|opy_Ligh|
|000005f0| 74 5f 53 6f 75 72 63 65 | 2c 0d 20 20 54 72 61 6e |t_Source|,.  Tran|
|00000600| 73 6c 61 74 65 5f 4c 69 | 67 68 74 5f 53 6f 75 72 |slate_Li|ght_Sour|
|00000610| 63 65 2c 20 52 6f 74 61 | 74 65 5f 4c 69 67 68 74 |ce, Rota|te_Light|
|00000620| 5f 53 6f 75 72 63 65 2c | 0d 20 20 53 63 61 6c 65 |_Source,|.  Scale|
|00000630| 5f 4c 69 67 68 74 5f 53 | 6f 75 72 63 65 2c 20 54 |_Light_S|ource, T|
|00000640| 72 61 6e 73 66 6f 72 6d | 5f 4c 69 67 68 74 5f 53 |ransform|_Light_S|
|00000650| 6f 75 72 63 65 2c 20 49 | 6e 76 65 72 74 5f 4c 69 |ource, I|nvert_Li|
|00000660| 67 68 74 5f 53 6f 75 72 | 63 65 2c 0d 20 20 44 65 |ght_Sour|ce,.  De|
|00000670| 73 74 72 6f 79 5f 4c 69 | 67 68 74 5f 53 6f 75 72 |stroy_Li|ght_Sour|
|00000680| 63 65 0d 7d 3b 0d 0d 73 | 74 61 74 69 63 20 44 42 |ce.};..s|tatic DB|
|00000690| 4c 20 63 75 62 69 63 5f | 73 70 6c 69 6e 65 20 50 |L cubic_|spline P|
|000006a0| 41 52 41 4d 53 28 28 20 | 44 42 4c 20 6c 6f 77 2c |ARAMS(( |DBL low,|
|000006b0| 44 42 4c 20 68 69 67 68 | 2c 44 42 4c 20 70 6f 73 |DBL high|,DBL pos|
|000006c0| 29 29 3b 0d 0d 69 6e 74 | 20 41 6c 6c 5f 4c 69 67 |));..int| All_Lig|
|000006d0| 68 74 5f 53 6f 75 72 63 | 65 5f 49 6e 74 65 72 73 |ht_Sourc|e_Inters|
|000006e0| 65 63 74 69 6f 6e 73 20 | 28 4f 62 6a 65 63 74 2c |ections |(Object,|
|000006f0| 20 52 61 79 2c 20 44 65 | 70 74 68 5f 53 74 61 63 | Ray, De|pth_Stac|
|00000700| 6b 29 0d 4f 42 4a 45 43 | 54 20 2a 4f 62 6a 65 63 |k).OBJEC|T *Objec|
|00000710| 74 3b 0d 52 41 59 20 2a | 52 61 79 3b 0d 49 53 54 |t;.RAY *|Ray;.IST|
|00000720| 41 43 4b 20 2a 44 65 70 | 74 68 5f 53 74 61 63 6b |ACK *Dep|th_Stack|
|00000730| 3b 0d 20 20 7b 0d 20 20 | 69 66 20 28 28 28 4c 49 |;.  {.  |if (((LI|
|00000740| 47 48 54 5f 53 4f 55 52 | 43 45 20 2a 29 4f 62 6a |GHT_SOUR|CE *)Obj|
|00000750| 65 63 74 29 2d 3e 43 68 | 69 6c 64 72 65 6e 20 21 |ect)->Ch|ildren !|
|00000760| 3d 20 4e 55 4c 4c 29 0d | 20 20 20 20 69 66 20 28 |= NULL).|    if (|
|00000770| 52 61 79 5f 49 6e 5f 42 | 6f 75 6e 64 73 20 28 52 |Ray_In_B|ounds (R|
|00000780| 61 79 2c 20 28 28 4c 49 | 47 48 54 5f 53 4f 55 52 |ay, ((LI|GHT_SOUR|
|00000790| 43 45 20 2a 29 4f 62 6a | 65 63 74 29 2d 3e 43 68 |CE *)Obj|ect)->Ch|
|000007a0| 69 6c 64 72 65 6e 2d 3e | 42 6f 75 6e 64 29 29 0d |ildren->|Bound)).|
|000007b0| 20 20 20 20 20 20 69 66 | 20 28 41 6c 6c 5f 49 6e |      if| (All_In|
|000007c0| 74 65 72 73 65 63 74 69 | 6f 6e 73 20 28 28 28 4c |tersecti|ons (((L|
|000007d0| 49 47 48 54 5f 53 4f 55 | 52 43 45 20 2a 29 4f 62 |IGHT_SOU|RCE *)Ob|
|000007e0| 6a 65 63 74 29 2d 3e 43 | 68 69 6c 64 72 65 6e 2c |ject)->C|hildren,|
|000007f0| 20 52 61 79 2c 20 44 65 | 70 74 68 5f 53 74 61 63 | Ray, De|pth_Stac|
|00000800| 6b 29 29 0d 20 20 20 20 | 20 20 20 20 72 65 74 75 |k)).    |    retu|
|00000810| 72 6e 20 28 54 52 55 45 | 29 3b 0d 0d 20 20 72 65 |rn (TRUE|);..  re|
|00000820| 74 75 72 6e 20 28 46 41 | 4c 53 45 29 3b 0d 20 20 |turn (FA|LSE);.  |
|00000830| 7d 0d 0d 69 6e 74 20 49 | 6e 73 69 64 65 5f 4c 69 |}..int I|nside_Li|
|00000840| 67 68 74 5f 53 6f 75 72 | 63 65 20 28 49 50 6f 69 |ght_Sour|ce (IPoi|
|00000850| 6e 74 2c 20 4f 62 6a 65 | 63 74 29 0d 56 45 43 54 |nt, Obje|ct).VECT|
|00000860| 4f 52 20 2a 49 50 6f 69 | 6e 74 3b 0d 4f 42 4a 45 |OR *IPoi|nt;.OBJE|
|00000870| 43 54 20 2a 4f 62 6a 65 | 63 74 3b 0d 20 20 7b 0d |CT *Obje|ct;.  {.|
|00000880| 20 20 69 66 20 28 28 28 | 4c 49 47 48 54 5f 53 4f |  if (((|LIGHT_SO|
|00000890| 55 52 43 45 20 2a 29 4f | 62 6a 65 63 74 29 2d 3e |URCE *)O|bject)->|
|000008a0| 43 68 69 6c 64 72 65 6e | 20 21 3d 20 4e 55 4c 4c |Children| != NULL|
|000008b0| 29 0d 20 20 20 20 69 66 | 20 28 49 6e 73 69 64 65 |).    if| (Inside|
|000008c0| 5f 4f 62 6a 65 63 74 20 | 28 49 50 6f 69 6e 74 2c |_Object |(IPoint,|
|000008d0| 20 28 28 4c 49 47 48 54 | 5f 53 4f 55 52 43 45 20 | ((LIGHT|_SOURCE |
|000008e0| 2a 29 4f 62 6a 65 63 74 | 29 2d 3e 43 68 69 6c 64 |*)Object|)->Child|
|000008f0| 72 65 6e 29 29 0d 20 20 | 20 20 20 20 72 65 74 75 |ren)).  |    retu|
|00000900| 72 6e 20 28 54 52 55 45 | 29 3b 0d 0d 20 20 72 65 |rn (TRUE|);..  re|
|00000910| 74 75 72 6e 20 28 46 41 | 4c 53 45 29 3b 0d 20 20 |turn (FA|LSE);.  |
|00000920| 7d 0d 0d 76 6f 69 64 20 | 4c 69 67 68 74 5f 53 6f |}..void |Light_So|
|00000930| 75 72 63 65 5f 4e 6f 72 | 6d 61 6c 20 28 52 65 73 |urce_Nor|mal (Res|
|00000940| 75 6c 74 2c 20 4f 62 6a | 65 63 74 2c 20 49 50 6f |ult, Obj|ect, IPo|
|00000950| 69 6e 74 29 0d 4f 42 4a | 45 43 54 20 2a 4f 62 6a |int).OBJ|ECT *Obj|
|00000960| 65 63 74 3b 0d 56 45 43 | 54 4f 52 20 2a 52 65 73 |ect;.VEC|TOR *Res|
|00000970| 75 6c 74 2c 20 2a 49 50 | 6f 69 6e 74 3b 0d 20 20 |ult, *IP|oint;.  |
|00000980| 7b 0d 20 20 69 66 20 28 | 28 28 4c 49 47 48 54 5f |{.  if (|((LIGHT_|
|00000990| 53 4f 55 52 43 45 20 2a | 29 4f 62 6a 65 63 74 29 |SOURCE *|)Object)|
|000009a0| 2d 3e 43 68 69 6c 64 72 | 65 6e 20 21 3d 20 4e 55 |->Childr|en != NU|
|000009b0| 4c 4c 29 0d 20 20 20 20 | 4e 6f 72 6d 61 6c 20 28 |LL).    |Normal (|
|000009c0| 52 65 73 75 6c 74 2c 20 | 28 28 4c 49 47 48 54 5f |Result, |((LIGHT_|
|000009d0| 53 4f 55 52 43 45 20 2a | 29 4f 62 6a 65 63 74 29 |SOURCE *|)Object)|
|000009e0| 2d 3e 43 68 69 6c 64 72 | 65 6e 2c 49 50 6f 69 6e |->Childr|en,IPoin|
|000009f0| 74 29 3b 0d 20 20 7d 0d | 0d 76 6f 69 64 20 54 72 |t);.  }.|.void Tr|
|00000a00| 61 6e 73 6c 61 74 65 5f | 4c 69 67 68 74 5f 53 6f |anslate_|Light_So|
|00000a10| 75 72 63 65 20 28 4f 62 | 6a 65 63 74 2c 20 56 65 |urce (Ob|ject, Ve|
|00000a20| 63 74 6f 72 29 0d 4f 42 | 4a 45 43 54 20 2a 4f 62 |ctor).OB|JECT *Ob|
|00000a30| 6a 65 63 74 3b 0d 56 45 | 43 54 4f 52 20 2a 56 65 |ject;.VE|CTOR *Ve|
|00000a40| 63 74 6f 72 3b 0d 20 20 | 7b 0d 20 20 56 41 64 64 |ctor;.  |{.  VAdd|
|00000a50| 45 71 20 28 28 28 4c 49 | 47 48 54 5f 53 4f 55 52 |Eq (((LI|GHT_SOUR|
|00000a60| 43 45 20 2a 29 20 4f 62 | 6a 65 63 74 29 2d 3e 43 |CE *) Ob|ject)->C|
|00000a70| 65 6e 74 65 72 2c 20 2a | 56 65 63 74 6f 72 29 3b |enter, *|Vector);|
|00000a80| 0d 20 20 56 41 64 64 45 | 71 20 28 28 28 4c 49 47 |.  VAddE|q (((LIG|
|00000a90| 48 54 5f 53 4f 55 52 43 | 45 20 2a 29 20 4f 62 6a |HT_SOURC|E *) Obj|
|00000aa0| 65 63 74 29 2d 3e 50 6f | 69 6e 74 73 5f 41 74 2c |ect)->Po|ints_At,|
|00000ab0| 20 2a 56 65 63 74 6f 72 | 29 3b 0d 0d 20 20 54 72 | *Vector|);..  Tr|
|00000ac0| 61 6e 73 6c 61 74 65 5f | 4f 62 6a 65 63 74 20 28 |anslate_|Object (|
|00000ad0| 28 28 4c 49 47 48 54 5f | 53 4f 55 52 43 45 20 2a |((LIGHT_|SOURCE *|
|00000ae0| 29 4f 62 6a 65 63 74 29 | 2d 3e 43 68 69 6c 64 72 |)Object)|->Childr|
|00000af0| 65 6e 2c 20 56 65 63 74 | 6f 72 29 3b 0d 20 20 7d |en, Vect|or);.  }|
|00000b00| 0d 0d 76 6f 69 64 20 52 | 6f 74 61 74 65 5f 4c 69 |..void R|otate_Li|
|00000b10| 67 68 74 5f 53 6f 75 72 | 63 65 20 28 4f 62 6a 65 |ght_Sour|ce (Obje|
|00000b20| 63 74 2c 20 56 65 63 74 | 6f 72 29 0d 4f 42 4a 45 |ct, Vect|or).OBJE|
|00000b30| 43 54 20 2a 4f 62 6a 65 | 63 74 3b 0d 56 45 43 54 |CT *Obje|ct;.VECT|
|00000b40| 4f 52 20 2a 56 65 63 74 | 6f 72 3b 0d 20 20 7b 0d |OR *Vect|or;.  {.|
|00000b50| 20 20 54 52 41 4e 53 46 | 4f 52 4d 20 54 72 61 6e |  TRANSF|ORM Tran|
|00000b60| 73 3b 0d 0d 20 20 43 6f | 6d 70 75 74 65 5f 52 6f |s;..  Co|mpute_Ro|
|00000b70| 74 61 74 69 6f 6e 5f 54 | 72 61 6e 73 66 6f 72 6d |tation_T|ransform|
|00000b80| 20 28 26 54 72 61 6e 73 | 2c 20 56 65 63 74 6f 72 | (&Trans|, Vector|
|00000b90| 29 3b 0d 20 20 54 72 61 | 6e 73 66 6f 72 6d 5f 4c |);.  Tra|nsform_L|
|00000ba0| 69 67 68 74 5f 53 6f 75 | 72 63 65 28 4f 62 6a 65 |ight_Sou|rce(Obje|
|00000bb0| 63 74 2c 20 26 54 72 61 | 6e 73 29 3b 0d 20 20 7d |ct, &Tra|ns);.  }|
|00000bc0| 0d 0d 76 6f 69 64 20 53 | 63 61 6c 65 5f 4c 69 67 |..void S|cale_Lig|
|00000bd0| 68 74 5f 53 6f 75 72 63 | 65 20 28 4f 62 6a 65 63 |ht_Sourc|e (Objec|
|00000be0| 74 2c 20 56 65 63 74 6f | 72 29 0d 4f 42 4a 45 43 |t, Vecto|r).OBJEC|
|00000bf0| 54 20 2a 4f 62 6a 65 63 | 74 3b 0d 56 45 43 54 4f |T *Objec|t;.VECTO|
|00000c00| 52 20 2a 56 65 63 74 6f | 72 3b 0d 20 20 7b 0d 20 |R *Vecto|r;.  {. |
|00000c10| 20 54 52 41 4e 53 46 4f | 52 4d 20 54 72 61 6e 73 | TRANSFO|RM Trans|
|00000c20| 3b 0d 0d 20 20 43 6f 6d | 70 75 74 65 5f 53 63 61 |;..  Com|pute_Sca|
|00000c30| 6c 69 6e 67 5f 54 72 61 | 6e 73 66 6f 72 6d 20 28 |ling_Tra|nsform (|
|00000c40| 26 54 72 61 6e 73 2c 20 | 56 65 63 74 6f 72 29 3b |&Trans, |Vector);|
|00000c50| 0d 20 20 54 72 61 6e 73 | 66 6f 72 6d 5f 4c 69 67 |.  Trans|form_Lig|
|00000c60| 68 74 5f 53 6f 75 72 63 | 65 28 4f 62 6a 65 63 74 |ht_Sourc|e(Object|
|00000c70| 2c 20 26 54 72 61 6e 73 | 29 3b 0d 20 20 7d 0d 0d |, &Trans|);.  }..|
|00000c80| 76 6f 69 64 20 49 6e 76 | 65 72 74 5f 4c 69 67 68 |void Inv|ert_Ligh|
|00000c90| 74 5f 53 6f 75 72 63 65 | 20 28 4f 62 6a 65 63 74 |t_Source| (Object|
|00000ca0| 29 0d 4f 42 4a 45 43 54 | 20 2a 4f 62 6a 65 63 74 |).OBJECT| *Object|
|00000cb0| 3b 0d 20 20 7b 0d 20 20 | 49 6e 76 65 72 74 5f 4f |;.  {.  |Invert_O|
|00000cc0| 62 6a 65 63 74 20 28 28 | 28 4c 49 47 48 54 5f 53 |bject ((|(LIGHT_S|
|00000cd0| 4f 55 52 43 45 20 2a 29 | 4f 62 6a 65 63 74 29 2d |OURCE *)|Object)-|
|00000ce0| 3e 43 68 69 6c 64 72 65 | 6e 29 3b 0d 20 20 7d 0d |>Childre|n);.  }.|
|00000cf0| 0d 76 6f 69 64 20 54 72 | 61 6e 73 66 6f 72 6d 5f |.void Tr|ansform_|
|00000d00| 4c 69 67 68 74 5f 53 6f | 75 72 63 65 20 28 4f 62 |Light_So|urce (Ob|
|00000d10| 6a 65 63 74 2c 20 54 72 | 61 6e 73 29 0d 4f 42 4a |ject, Tr|ans).OBJ|
|00000d20| 45 43 54 20 2a 4f 62 6a | 65 63 74 3b 0d 54 52 41 |ECT *Obj|ect;.TRA|
|00000d30| 4e 53 46 4f 52 4d 20 2a | 54 72 61 6e 73 3b 0d 20 |NSFORM *|Trans;. |
|00000d40| 20 7b 0d 20 20 4d 54 72 | 61 6e 73 50 6f 69 6e 74 | {.  MTr|ansPoint|
|00000d50| 20 28 26 28 28 4c 49 47 | 48 54 5f 53 4f 55 52 43 | (&((LIG|HT_SOURC|
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|00000d80| 48 54 5f 53 4f 55 52 43 | 45 20 2a 29 20 4f 62 6a |HT_SOURC|E *) Obj|
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|00000dc0| 55 52 43 45 20 2a 29 20 | 4f 62 6a 65 63 74 29 2d |URCE *) |Object)-|
|00000dd0| 3e 50 6f 69 6e 74 73 5f | 41 74 2c 0d 20 20 20 20 |>Points_|At,.    |
|00000de0| 26 28 28 4c 49 47 48 54 | 5f 53 4f 55 52 43 45 20 |&((LIGHT|_SOURCE |
|00000df0| 2a 29 20 4f 62 6a 65 63 | 74 29 2d 3e 50 6f 69 6e |*) Objec|t)->Poin|
|00000e00| 74 73 5f 41 74 2c 20 54 | 72 61 6e 73 29 3b 0d 20 |ts_At, T|rans);. |
|00000e10| 20 4d 54 72 61 6e 73 50 | 6f 69 6e 74 20 28 26 28 | MTransP|oint (&(|
|00000e20| 28 4c 49 47 48 54 5f 53 | 4f 55 52 43 45 20 2a 29 |(LIGHT_S|OURCE *)|
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|00000e50| 55 52 43 45 20 2a 29 20 | 4f 62 6a 65 63 74 29 2d |URCE *) |Object)-|
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|00000e70| 20 20 4d 54 72 61 6e 73 | 50 6f 69 6e 74 20 28 26 |  MTrans|Point (&|
|00000e80| 28 28 4c 49 47 48 54 5f | 53 4f 55 52 43 45 20 2a |((LIGHT_|SOURCE *|
|00000e90| 29 20 4f 62 6a 65 63 74 | 29 2d 3e 41 78 69 73 32 |) Object|)->Axis2|
|00000ea0| 2c 0d 20 20 20 20 26 28 | 28 4c 49 47 48 54 5f 53 |,.    &(|(LIGHT_S|
|00000eb0| 4f 55 52 43 45 20 2a 29 | 20 4f 62 6a 65 63 74 29 |OURCE *)| Object)|
|00000ec0| 2d 3e 41 78 69 73 32 2c | 20 54 72 61 6e 73 29 3b |->Axis2,| Trans);|
|00000ed0| 0d 20 20 54 72 61 6e 73 | 66 6f 72 6d 5f 4f 62 6a |.  Trans|form_Obj|
|00000ee0| 65 63 74 20 28 28 28 4c | 49 47 48 54 5f 53 4f 55 |ect (((L|IGHT_SOU|
|00000ef0| 52 43 45 20 2a 29 4f 62 | 6a 65 63 74 29 2d 3e 43 |RCE *)Ob|ject)->C|
|00000f00| 68 69 6c 64 72 65 6e 2c | 20 54 72 61 6e 73 29 3b |hildren,| Trans);|
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|00000f40| 2a 4f 62 6a 65 63 74 3b | 0d 20 20 7b 0d 20 20 69 |*Object;|.  {.  i|
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|00000f90| 7b 20 0d 20 20 20 20 66 | 6f 72 20 28 69 20 3d 20 |{ .    f|or (i = |
|00000fa0| 30 3b 20 69 20 3c 20 28 | 28 4c 49 47 48 54 5f 53 |0; i < (|(LIGHT_S|
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|00000fc0| 3e 41 72 65 61 5f 53 69 | 7a 65 31 3b 20 69 2b 2b |>Area_Si|ze1; i++|
|00000fd0| 29 0d 20 20 20 20 20 20 | 66 72 65 65 28 28 28 4c |).      |free(((L|
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|00001020| 2a 29 4f 62 6a 65 63 74 | 29 2d 3e 4c 69 67 68 74 |*)Object|)->Light|
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|00001040| 20 20 44 65 73 74 72 6f | 79 5f 4f 62 6a 65 63 74 |  Destro|y_Object|
|00001050| 20 28 28 28 4c 49 47 48 | 54 5f 53 4f 55 52 43 45 | (((LIGH|T_SOURCE|
|00001060| 20 2a 29 4f 62 6a 65 63 | 74 29 2d 3e 43 68 69 6c | *)Objec|t)->Chil|
|00001070| 64 72 65 6e 29 3b 0d 20 | 20 66 72 65 65 20 28 4f |dren);. | free (O|
|00001080| 62 6a 65 63 74 29 3b 0d | 20 20 7d 0d 0d 43 4f 4c |bject);.|  }..COL|
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|000010b0| 53 69 7a 65 32 29 0d 69 | 6e 74 20 53 69 7a 65 31 |Size2).i|nt Size1|
|000010c0| 2c 20 53 69 7a 65 32 3b | 0d 20 20 7b 0d 20 20 43 |, Size2;|.  {.  C|
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|000010f0| 43 4f 4c 4f 55 52 20 2a | 2a 29 6d 61 6c 6c 6f 63 |COLOUR *|*)malloc|
|00001100| 20 28 53 69 7a 65 31 20 | 2a 20 73 69 7a 65 6f 66 | (Size1 |* sizeof|
|00001110| 20 28 43 4f 4c 4f 55 52 | 20 2a 29 29 3b 0d 20 20 | (COLOUR| *));.  |
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|00001140| 72 65 61 20 6c 69 67 68 | 74 22 29 3b 0d 0d 20 20 |rea ligh|t");..  |
|00001150| 66 6f 72 20 28 69 20 3d | 20 30 3b 20 69 20 3c 20 |for (i =| 0; i < |
|00001160| 53 69 7a 65 31 3b 20 69 | 2b 2b 29 20 0d 20 20 20 |Size1; i|++) .   |
|00001170| 20 7b 0d 20 20 20 20 4e | 65 77 5b 69 5d 20 3d 20 | {.    N|ew[i] = |
|00001180| 28 43 4f 4c 4f 55 52 20 | 2a 29 6d 61 6c 6c 6f 63 |(COLOUR |*)malloc|
|00001190| 20 28 53 69 7a 65 32 20 | 2a 20 73 69 7a 65 6f 66 | (Size2 |* sizeof|
|000011a0| 20 28 43 4f 4c 4f 55 52 | 29 29 3b 0d 20 20 20 20 | (COLOUR|));.    |
|000011b0| 69 66 20 28 4e 65 77 5b | 69 5d 20 3d 3d 20 4e 55 |if (New[|i] == NU|
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|000011d0| 72 20 28 22 61 72 65 61 | 20 6c 69 67 68 74 22 29 |r ("area| light")|
|000011e0| 3b 0d 20 20 20 20 7d 0d | 0d 20 20 72 65 74 75 72 |;.    }.|.  retur|
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|00001200| 47 48 54 5f 53 4f 55 52 | 43 45 20 2a 43 72 65 61 |GHT_SOUR|CE *Crea|
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|00001220| 28 29 0d 20 20 7b 0d 20 | 20 4c 49 47 48 54 5f 53 |().  {. | LIGHT_S|
|00001230| 4f 55 52 43 45 20 2a 4e | 65 77 3b 0d 0d 20 20 69 |OURCE *N|ew;..  i|
|00001240| 66 20 28 28 4e 65 77 20 | 3d 20 28 4c 49 47 48 54 |f ((New |= (LIGHT|
|00001250| 5f 53 4f 55 52 43 45 20 | 2a 29 20 6d 61 6c 6c 6f |_SOURCE |*) mallo|
|00001260| 63 20 28 73 69 7a 65 6f | 66 20 28 4c 49 47 48 54 |c (sizeo|f (LIGHT|
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|00001280| 4c 4c 29 0d 20 20 20 20 | 4d 41 45 72 72 6f 72 20 |LL).    |MAError |
|00001290| 28 22 6c 69 67 68 74 5f | 73 6f 75 72 63 65 22 29 |("light_|source")|
|000012a0| 3b 0d 0d 20 20 49 4e 49 | 54 5f 4f 42 4a 45 43 54 |;..  INI|T_OBJECT|
|000012b0| 5f 46 49 45 4c 44 53 28 | 4e 65 77 2c 20 4c 49 47 |_FIELDS(|New, LIG|
|000012c0| 48 54 5f 4f 42 4a 45 43 | 54 2c 20 26 4c 69 67 68 |HT_OBJEC|T, &Ligh|
|000012d0| 74 5f 53 6f 75 72 63 65 | 5f 4d 65 74 68 6f 64 73 |t_Source|_Methods|
|000012e0| 29 0d 20 20 20 20 4e 65 | 77 2d 3e 43 68 69 6c 64 |).    Ne|w->Child|
|000012f0| 72 65 6e 20 3d 20 4e 55 | 4c 4c 3b 0d 20 20 4e 65 |ren = NU|LL;.  Ne|
|00001300| 77 2d 3e 4e 6f 5f 53 68 | 61 64 6f 77 5f 46 6c 61 |w->No_Sh|adow_Fla|
|00001310| 67 20 3d 20 54 52 55 45 | 3b 0d 0d 20 20 4d 61 6b |g = TRUE|;..  Mak|
|00001320| 65 5f 43 6f 6c 6f 75 72 | 28 26 4e 65 77 2d 3e 43 |e_Colour|(&New->C|
|00001330| 6f 6c 6f 75 72 2c 31 2e | 30 2c 31 2e 30 2c 31 2e |olour,1.|0,1.0,1.|
|00001340| 30 29 3b 0d 20 20 4d 61 | 6b 65 5f 56 65 63 74 6f |0);.  Ma|ke_Vecto|
|00001350| 72 28 26 4e 65 77 2d 3e | 43 65 6e 74 65 72 2c 30 |r(&New->|Center,0|
|00001360| 2e 30 2c 30 2e 30 2c 30 | 2e 30 29 3b 0d 20 20 4d |.0,0.0,0|.0);.  M|
|00001370| 61 6b 65 5f 56 65 63 74 | 6f 72 28 26 4e 65 77 2d |ake_Vect|or(&New-|
|00001380| 3e 50 6f 69 6e 74 73 5f | 41 74 2c 30 2e 30 2c 30 |>Points_|At,0.0,0|
|00001390| 2e 30 2c 31 2e 30 29 3b | 0d 20 20 4d 61 6b 65 5f |.0,1.0);|.  Make_|
|000013a0| 56 65 63 74 6f 72 28 26 | 4e 65 77 2d 3e 41 78 69 |Vector(&|New->Axi|
|000013b0| 73 31 2c 30 2e 30 2c 30 | 2e 30 2c 31 2e 30 29 3b |s1,0.0,0|.0,1.0);|
|000013c0| 0d 20 20 4d 61 6b 65 5f | 56 65 63 74 6f 72 28 26 |.  Make_|Vector(&|
|000013d0| 4e 65 77 2d 3e 41 78 69 | 73 32 2c 30 2e 30 2c 31 |New->Axi|s2,0.0,1|
|000013e0| 2e 30 2c 30 2e 30 29 3b | 0d 20 20 4e 65 77 2d 3e |.0,0.0);|.  New->|
|000013f0| 43 6f 65 66 66 20 20 20 | 3d 20 31 30 2e 30 3b 0d |Coeff   |= 10.0;.|
|00001400| 20 20 4e 65 77 2d 3e 52 | 61 64 69 75 73 20 20 3d |  New->R|adius  =|
|00001410| 20 30 2e 33 35 3b 0d 20 | 20 4e 65 77 2d 3e 46 61 | 0.35;. | New->Fa|
|00001420| 6c 6c 6f 66 66 20 3d 20 | 30 2e 33 35 3b 0d 20 20 |lloff = |0.35;.  |
|00001430| 4e 65 77 2d 3e 4e 65 78 | 74 5f 4c 69 67 68 74 5f |New->Nex|t_Light_|
|00001440| 53 6f 75 72 63 65 20 20 | 20 20 3d 20 4e 55 4c 4c |Source  |  = NULL|
|00001450| 3b 0d 20 20 4e 65 77 2d | 3e 53 68 61 64 6f 77 5f |;.  New-|>Shadow_|
|00001460| 43 61 63 68 65 64 5f 4f | 62 6a 65 63 74 20 3d 20 |Cached_O|bject = |
|00001470| 4e 55 4c 4c 3b 0d 20 20 | 4e 65 77 2d 3e 4c 69 67 |NULL;.  |New->Lig|
|00001480| 68 74 5f 47 72 69 64 20 | 20 20 20 20 20 20 20 20 |ht_Grid |        |
|00001490| 20 20 3d 20 4e 55 4c 4c | 3b 0d 20 20 4e 65 77 2d |  = NULL|;.  New-|
|000014a0| 3e 4c 69 67 68 74 5f 54 | 79 70 65 20 3d 20 50 4f |>Light_T|ype = PO|
|000014b0| 49 4e 54 5f 53 4f 55 52 | 43 45 3b 0d 20 20 4e 65 |INT_SOUR|CE;.  Ne|
|000014c0| 77 2d 3e 41 72 65 61 5f | 4c 69 67 68 74 20 3d 20 |w->Area_|Light = |
|000014d0| 46 41 4c 53 45 3b 0d 20 | 20 4e 65 77 2d 3e 4a 69 |FALSE;. | New->Ji|
|000014e0| 74 74 65 72 20 20 20 20 | 20 3d 20 46 41 4c 53 45 |tter    | = FALSE|
|000014f0| 3b 0d 20 20 4e 65 77 2d | 3e 54 72 61 63 6b 20 20 |;.  New-|>Track  |
|00001500| 20 20 20 20 3d 20 46 41 | 4c 53 45 3b 0d 20 20 4e |    = FA|LSE;.  N|
|00001510| 65 77 2d 3e 41 72 65 61 | 5f 53 69 7a 65 31 20 3d |ew->Area|_Size1 =|
|00001520| 20 30 3b 0d 20 20 4e 65 | 77 2d 3e 41 72 65 61 5f | 0;.  Ne|w->Area_|
|00001530| 53 69 7a 65 32 20 3d 20 | 30 3b 0d 20 20 4e 65 77 |Size2 = |0;.  New|
|00001540| 2d 3e 41 64 61 70 74 69 | 76 65 5f 4c 65 76 65 6c |->Adapti|ve_Level|
|00001550| 20 3d 20 31 30 30 3b 0d | 20 20 72 65 74 75 72 6e | = 100;.|  return|
|00001560| 20 28 4e 65 77 29 3b 0d | 20 20 7d 0d 0d 76 6f 69 | (New);.|  }..voi|
|00001570| 64 20 2a 43 6f 70 79 5f | 4c 69 67 68 74 5f 53 6f |d *Copy_|Light_So|
|00001580| 75 72 63 65 20 28 4f 6c | 64 29 0d 4f 42 4a 45 43 |urce (Ol|d).OBJEC|
|00001590| 54 20 2a 4f 6c 64 3b 0d | 20 20 7b 0d 20 20 4c 49 |T *Old;.|  {.  LI|
|000015a0| 47 48 54 5f 53 4f 55 52 | 43 45 20 2a 4e 65 77 3b |GHT_SOUR|CE *New;|
|000015b0| 0d 20 20 69 6e 74 20 69 | 2c 20 6a 3b 0d 0d 20 20 |.  int i|, j;..  |
|000015c0| 4e 65 77 20 3d 20 43 72 | 65 61 74 65 5f 4c 69 67 |New = Cr|eate_Lig|
|000015d0| 68 74 5f 53 6f 75 72 63 | 65 20 28 29 3b 0d 20 20 |ht_Sourc|e ();.  |
|000015e0| 2a 4e 65 77 20 3d 20 2a | 28 4c 49 47 48 54 5f 53 |*New = *|(LIGHT_S|
|000015f0| 4f 55 52 43 45 20 2a 29 | 4f 6c 64 3b 0d 0d 20 20 |OURCE *)|Old;..  |
|00001600| 4e 65 77 2d 3e 4e 65 78 | 74 5f 4c 69 67 68 74 5f |New->Nex|t_Light_|
|00001610| 53 6f 75 72 63 65 20 3d | 20 4e 55 4c 4c 3b 0d 0d |Source =| NULL;..|
|00001620| 20 20 4e 65 77 2d 3e 43 | 68 69 6c 64 72 65 6e 20 |  New->C|hildren |
|00001630| 3d 20 43 6f 70 79 5f 4f | 62 6a 65 63 74 20 28 28 |= Copy_O|bject ((|
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|00001650| 4f 6c 64 29 2d 3e 43 68 | 69 6c 64 72 65 6e 29 3b |Old)->Ch|ildren);|
|00001660| 0d 0d 20 20 69 66 20 28 | 28 28 4c 49 47 48 54 5f |..  if (|((LIGHT_|
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|00001690| 4c 29 20 0d 20 20 20 20 | 7b 20 0d 20 20 20 20 4e |L) .    |{ .    N|
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|000016f0| 49 47 48 54 5f 53 4f 55 | 52 43 45 20 2a 29 4f 6c |IGHT_SOU|RCE *)Ol|
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|00001760| 6a 20 3c 20 28 28 4c 49 | 47 48 54 5f 53 4f 55 52 |j < ((LI|GHT_SOUR|
|00001770| 43 45 20 2a 29 4f 6c 64 | 29 2d 3e 41 72 65 61 5f |CE *)Old|)->Area_|
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|00001790| 20 20 4e 65 77 2d 3e 4c | 69 67 68 74 5f 47 72 69 |  New->L|ight_Gri|
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|000017b0| 54 5f 53 4f 55 52 43 45 | 20 2a 29 4f 6c 64 29 2d |T_SOURCE| *)Old)-|
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|000018d0| 43 68 65 63 6b 20 74 6f | 20 73 65 65 20 69 66 20 |Check to| see if |
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|00001a10| 2a 20 70 6f 73 3b 0d 20 | 20 7d 0d 0d 44 42 4c 20 |* pos;. | }..DBL |
|00001a20| 41 74 74 65 6e 75 61 74 | 65 5f 4c 69 67 68 74 20 |Attenuat|e_Light |
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|00001a50| 0d 4c 49 47 48 54 5f 53 | 4f 55 52 43 45 20 2a 4c |.LIGHT_S|OURCE *L|
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|00001a70| 20 2a 4c 69 67 68 74 5f | 53 6f 75 72 63 65 5f 52 | *Light_|Source_R|
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|00001a90| 6e 2c 63 6f 73 74 68 65 | 74 61 3b 0d 20 20 44 42 |n,costhe|ta;.  DB|
|00001aa0| 4c 20 41 74 74 65 6e 75 | 61 74 69 6f 6e 20 3d 20 |L Attenu|ation = |
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|00001ac0| 6f 74 5f 44 69 72 65 63 | 74 69 6f 6e 3b 0d 0d 20 |ot_Direc|tion;.. |
|00001ad0| 20 2f 2a 20 49 66 20 74 | 68 69 73 20 69 73 20 61 | /* If t|his is a|
|00001ae0| 20 73 70 6f 74 6c 69 67 | 68 74 20 74 68 65 6e 20 | spotlig|ht then |
|00001af0| 61 74 74 65 6e 75 61 74 | 65 20 62 61 73 65 64 20 |attenuat|e based |
|00001b00| 6f 6e 20 74 68 65 20 69 | 6e 63 69 64 65 6e 63 65 |on the i|ncidence|
|00001b10| 20 61 6e 67 6c 65 20 2a | 2f 0d 20 20 69 66 20 28 | angle *|/.  if (|
|00001b20| 4c 69 67 68 74 5f 53 6f | 75 72 63 65 2d 3e 4c 69 |Light_So|urce->Li|
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|00001b60| 72 65 63 74 69 6f 6e 2c | 20 4c 69 67 68 74 5f 53 |rection,| Light_S|
|00001b70| 6f 75 72 63 65 2d 3e 50 | 6f 69 6e 74 73 5f 41 74 |ource->P|oints_At|
|00001b80| 2c 20 4c 69 67 68 74 5f | 53 6f 75 72 63 65 2d 3e |, Light_|Source->|
|00001b90| 43 65 6e 74 65 72 29 3b | 0d 20 20 20 20 56 4c 65 |Center);|.    VLe|
|00001ba0| 6e 67 74 68 28 4c 65 6e | 2c 20 53 70 6f 74 5f 44 |ngth(Len|, Spot_D|
|00001bb0| 69 72 65 63 74 69 6f 6e | 29 3b 0d 20 20 20 20 69 |irection|);.    i|
|00001bc0| 66 20 28 4c 65 6e 20 3e | 20 30 2e 30 29 20 0d 20 |f (Len >| 0.0) . |
|00001bd0| 20 20 20 20 20 7b 0d 20 | 20 20 20 20 20 56 49 6e |     {. |     VIn|
|00001be0| 76 65 72 73 65 53 63 61 | 6c 65 28 53 70 6f 74 5f |verseSca|le(Spot_|
|00001bf0| 44 69 72 65 63 74 69 6f | 6e 2c 20 53 70 6f 74 5f |Directio|n, Spot_|
|00001c00| 44 69 72 65 63 74 69 6f | 6e 2c 20 4c 65 6e 29 3b |Directio|n, Len);|
|00001c10| 0d 20 20 20 20 20 20 56 | 44 6f 74 28 63 6f 73 74 |.      V|Dot(cost|
|00001c20| 68 65 74 61 2c 20 4c 69 | 67 68 74 5f 53 6f 75 72 |heta, Li|ght_Sour|
|00001c30| 63 65 5f 52 61 79 2d 3e | 44 69 72 65 63 74 69 6f |ce_Ray->|Directio|
|00001c40| 6e 2c 20 53 70 6f 74 5f | 44 69 72 65 63 74 69 6f |n, Spot_|Directio|
|00001c50| 6e 29 3b 0d 20 20 20 20 | 20 20 63 6f 73 74 68 65 |n);.    |  costhe|
|00001c60| 74 61 20 2a 3d 20 2d 31 | 2e 30 3b 0d 20 20 20 20 |ta *= -1|.0;.    |
|00001c70| 20 20 69 66 20 28 63 6f | 73 74 68 65 74 61 20 3e |  if (co|stheta >|
|00001c80| 20 30 2e 30 29 20 0d 20 | 20 20 20 20 20 20 20 7b | 0.0) . |       {|
|00001c90| 0d 20 20 20 20 20 20 20 | 20 41 74 74 65 6e 75 61 |.       | Attenua|
|00001ca0| 74 69 6f 6e 20 3d 20 70 | 6f 77 28 63 6f 73 74 68 |tion = p|ow(costh|
|00001cb0| 65 74 61 2c 20 4c 69 67 | 68 74 5f 53 6f 75 72 63 |eta, Lig|ht_Sourc|
|00001cc0| 65 2d 3e 43 6f 65 66 66 | 29 3b 0d 20 20 20 20 20 |e->Coeff|);.     |
|00001cd0| 20 20 20 2f 2a 20 49 66 | 20 74 68 65 72 65 20 69 |   /* If| there i|
|00001ce0| 73 20 61 20 73 6f 66 74 | 20 66 61 6c 6c 6f 66 66 |s a soft| falloff|
|00001cf0| 20 72 65 67 69 6f 6e 20 | 61 73 73 6f 63 69 61 74 | region |associat|
|00001d00| 65 64 20 77 69 74 68 20 | 74 68 65 20 6c 69 67 68 |ed with |the ligh|
|00001d10| 74 20 74 68 65 6e 0d 20 | 20 20 20 20 20 20 20 20 |t then. |        |
|00001d20| 20 20 20 20 20 20 64 6f | 20 61 6e 20 69 6e 74 65 |      do| an inte|
|00001d30| 72 70 6f 6c 61 74 69 6f | 6e 20 6f 66 20 76 61 6c |rpolatio|n of val|
|00001d40| 75 65 73 20 62 65 74 77 | 65 65 6e 20 74 68 65 20 |ues betw|een the |
|00001d50| 68 6f 74 20 63 65 6e 74 | 65 72 20 61 6e 64 20 74 |hot cent|er and t|
|00001d60| 68 65 0d 20 20 20 20 20 | 20 20 20 20 20 20 20 20 |he.     |        |
|00001d70| 20 20 64 69 72 65 63 74 | 69 6f 6e 20 61 74 20 77 |  direct|ion at w|
|00001d80| 68 69 63 68 20 6c 69 67 | 68 74 20 66 61 6c 6c 73 |hich lig|ht falls|
|00001d90| 20 74 6f 20 6e 6f 74 68 | 69 6e 67 2e 20 2a 2f 0d | to noth|ing. */.|
|00001da0| 20 20 20 20 20 20 20 20 | 69 66 20 28 4c 69 67 68 |        |if (Ligh|
|00001db0| 74 5f 53 6f 75 72 63 65 | 2d 3e 52 61 64 69 75 73 |t_Source|->Radius|
|00001dc0| 20 3e 20 30 2e 30 29 0d | 20 20 20 20 20 20 20 20 | > 0.0).|        |
|00001dd0| 20 20 41 74 74 65 6e 75 | 61 74 69 6f 6e 20 2a 3d |  Attenu|ation *=|
|00001de0| 20 63 75 62 69 63 5f 73 | 70 6c 69 6e 65 28 4c 69 | cubic_s|pline(Li|
|00001df0| 67 68 74 5f 53 6f 75 72 | 63 65 2d 3e 46 61 6c 6c |ght_Sour|ce->Fall|
|00001e00| 6f 66 66 2c 0d 20 20 20 | 20 20 20 20 20 20 20 20 |off,.   |        |
|00001e10| 20 4c 69 67 68 74 5f 53 | 6f 75 72 63 65 2d 3e 52 | Light_S|ource->R|
|00001e20| 61 64 69 75 73 2c 0d 20 | 20 20 20 20 20 20 20 20 |adius,. |        |
|00001e30| 20 20 20 63 6f 73 74 68 | 65 74 61 29 3b 0d 20 20 |   costh|eta);.  |
|00001e40| 20 20 20 20 20 20 2f 2a | 20 70 72 69 6e 74 66 28 |      /*| printf(|
|00001e50| 22 41 74 74 65 6e 3a 20 | 25 6c 67 5c 6e 22 2c 20 |"Atten: |%lg\n", |
|00001e60| 41 74 74 65 6e 75 61 74 | 69 6f 6e 29 3b 20 2a 2f |Attenuat|ion); */|
|00001e70| 0d 20 20 20 20 20 20 20 | 20 7d 0d 20 20 20 20 20 |.       | }.     |
|00001e80| 20 65 6c 73 65 0d 20 20 | 20 20 20 20 20 20 41 74 | else.  |      At|
|00001e90| 74 65 6e 75 61 74 69 6f | 6e 20 3d 20 30 2e 30 3b |tenuatio|n = 0.0;|
|00001ea0| 0d 20 20 20 20 20 20 7d | 0d 20 20 20 20 65 6c 73 |.      }|.    els|
|00001eb0| 65 0d 20 20 20 20 20 20 | 41 74 74 65 6e 75 61 74 |e.      |Attenuat|
|00001ec0| 69 6f 6e 20 3d 20 30 2e | 30 3b 0d 20 20 20 20 7d |ion = 0.|0;.    }|
|00001ed0| 20 0d 20 20 72 65 74 75 | 72 6e 28 41 74 74 65 6e | .  retu|rn(Atten|
|00001ee0| 75 61 74 69 6f 6e 29 3b | 0d 20 20 7d 20 20 20 20 |uation);|.  }    |
|00001ef0| 0d 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00001f00| 00 00 01 00 00 00 01 6e | 00 00 00 6e 00 00 00 3e |.......n|...n...>|
|00001f10| 20 69 66 20 28 28 44 65 | 66 61 75 6c 74 5f 54 65 | if ((De|fault_Te|
|00001f20| 78 74 75 72 65 2d 3e 54 | 6e 6f 72 6d 61 6c 29 20 |xture->T|normal) |
|00001f30| 07 50 4f 49 4e 54 2e 43 | 02 00 00 00 54 45 58 54 |.POINT.C|....TEXT|
|00001f40| 4d 50 53 20 01 08 ff ff | ff ff 00 00 00 00 16 a9 |MPS ....|........|
|00001f50| 00 00 54 45 58 54 4d 50 | 53 20 01 08 ff ff ff ff |..TEXTMP|S ......|
|00001f60| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00001f70| 00 00 a8 7d b4 7c 00 00 | 1e 71 00 00 01 ac 20 65 |...}.|..|.q.... e|
|00001f80| 6c 73 65 0d 20 20 20 20 | 20 20 20 2a 54 6e 6f 72 |lse.    |   *Tnor|
|00001f90| 6d 61 6c 5f 50 74 72 20 | 3d 20 43 72 65 61 74 65 |mal_Ptr |= Create|
|00001fa0| 5f 54 6e 6f 72 6d 61 6c | 20 28 29 3b 0d 0d 20 20 |_Tnormal| ();..  |
|00001fb0| 20 4e 65 77 20 3d 20 2a | 54 6e 6f 72 6d 61 6c 5f | New = *|Tnormal_|
|00001fc0| 50 74 72 3b 0d 0d 20 20 | 20 45 58 50 45 43 54 20 |Ptr;..  | EXPECT |
|00001fd0| 20 2f 2a 20 5b 74 6e 6f | 72 6d 61 6c 5f 62 6f 64 | /* [tno|rmal_bod|
|00001fe0| 79 5d 20 2a 2f 0d 20 20 | 20 20 20 43 41 53 45 20 |y] */.  |   CASE |
|00001ff0| 28 42 55 4d 50 53 5f 54 | 4f 4b 45 4e 29 0d 20 20 |(BUMPS_T|OKEN).  |
|00002000| 00 00 00 48 00 09 4d 6f | 6e 61 63 6f 00 2a 2a 2a |...H..Mo|naco.***|
|00002010| 2a 2a 2a 2a 2a 2a 2a 2a | 2a 2a 2a 2a 2a 2a 2a 2a |********|********|
|00002020| 2a 0d 2a 20 20 20 00 06 | 00 04 00 3c 00 24 01 dd |*.*   ..|...<.$..|
|00002030| 02 3d 00 3c 00 24 01 dd | 02 3d a8 7d b4 7c 00 00 |.=.<.$..|.=.}.|..|
|00002040| 00 00 00 00 00 00 00 00 | 00 00 01 00 00 00 00 1e |........|........|
|00002050| 00 3c 00 24 01 dd 02 3d | 00 3c 00 24 01 dd 02 3d |.<.$...=|.<.$...=|
|00002060| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00002070| 01 00 00 00 01 6e 00 00 | 00 6e 00 00 00 3e 00 8d |.....n..|.n...>..|
|00002080| 3b f8 18 3e 00 00 00 1c | 00 3e 00 00 4d 50 53 52 |;..>....|.>..MPSR|
|00002090| 00 01 00 0a 03 ed ff ff | 00 00 00 00 00 00 00 00 |........|........|
|000020a0| 03 f0 ff ff 00 00 00 4c | 00 8f 92 30 00 00 00 00 |.......L|...0....|
|000020b0| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|000020c0| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|000020d0| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|000020e0| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|000020f0| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
+--------+-------------------------+-------------------------+--------+--------+