Usenet 1994 January/usenetsourcesnewsgroupsinfomagicjanuary1994.iso/sources/misc/volume21/rayshade/part18

Text File | 1991-07-21 | 30.9 KB | 1,483 lines

Newsgroups: comp.sources.misc
From: Rayshade Construction Co. <[e-mail]>
Subject:  v21i021:  rayshade - A raytracing package for UNIX, Part18/19
Message-ID: <[e-mail]>
X-Md4-Signature: be1f377f170779e089ebeb562537fad0
Date: Sun, 21 Jul 1991 22:34:43 GMT
Approved: [e-mail]

Submitted-by: Rayshade Construction Co. <[e-mail]>
Posting-number: Volume 21, Issue 21
Archive-name: rayshade/part18
Environment: UNIX, !16BIT

#! /bin/sh
# This is a shell archive.  Remove anything before this line, then unpack
# it by saving it into a file and typing "sh file".  To overwrite existing
# files, type "sh file -c".  You can also feed this as standard input via
# unshar, or by typing "sh <file", e.g..  If this archive is complete, you
# will see the following message at the end:
#        "End of archive 18 (of 19)."
# Contents:  libshade/yacc.y
# Wrapped by kolb@woody on Wed Jul 17 17:57:01 1991
PATH=/bin:/usr/bin:/usr/ucb ; export PATH
if test -f 'libshade/yacc.y' -a "${1}" != "-c" ; then
  echo shar: Will not clobber existing file \"'libshade/yacc.y'\"
else
echo shar: Extracting \"'libshade/yacc.y'\" \(28326 characters\)
sed "s/^X//" >'libshade/yacc.y' <<'END_OF_FILE'
X/* yacc.y                                   */
X/*                                       */
X/* Copyright (C) 1989, 1991, Craig E. Kolb                   */
X/* All rights reserved.                               */
X/*                                       */
X/* This software may be freely copied, modified, and redistributed,       */
X/* provided that this copyright notice is preserved on all copies.       */
X/*                                       */
X/* You may not distribute this software, in whole or in part, as part of   */
X/* any commercial product without the express consent of the authors.       */
X/*                                        */
X/* There is no warranty or other guarantee of fitness of this software       */
X/* for any purpose.  It is provided solely "as is".               */
X/* $Id: yacc.y,v 4.0 91/07/17 17:39:39 kolb Exp Locker: kolb $ */
X%{
X#include "rayshade.h"
X
X#include "symtab.h"
X#include "builtin.h"
X
X#include "libsurf/atmosphere.h"
X#include "libsurf/surface.h"
X#include "libtext/texture.h"
X#include "libimage/image.h"
X#include "libobj/geom.h"
X#include "liblight/light.h"
X#include "options.h"
X#include "stats.h"
X#include "viewing.h"
X
X#include "libobj/blob.h"
X#include "libobj/box.h"
X#include "libobj/cone.h"
X#include "libobj/csg.h"
X#include "libobj/cylinder.h"
X#include "libobj/disc.h"
X#include "libobj/grid.h"
X#include "libobj/hf.h"
X#include "libobj/instance.h"
X#include "libobj/list.h"
X#include "libobj/plane.h"
X#include "libobj/poly.h"
X#include "libobj/sphere.h"
X#include "libobj/torus.h"
X#include "libobj/triangle.h"
X
X#include "liblight/point.h"
X#include "liblight/infinite.h"
X#include "liblight/spot.h"
X#include "liblight/jittered.h"
X#include "liblight/extended.h"
X
X#include "libtext/blotch.h"
X#include "libtext/bump.h"
X#include "libtext/checker.h"
X#include "libtext/cloud.h"
X#include "libtext/fbm.h"
X#include "libtext/fbmbump.h"
X#include "libtext/gloss.h"
X#include "libtext/imagetext.h"
X#include "libtext/marble.h"
X#include "libtext/mount.h"
X#include "libtext/sky.h"
X#include "libtext/stripe.h"
X#include "libtext/windy.h"
X#include "libtext/wood.h"
X
X#include "libsurf/fog.h"
X#include "libsurf/fogdeck.h"
X#include "libsurf/mist.h"
X
X#include "libcommon/rotate.h"
X#include "libcommon/scale.h"
X#include "libcommon/translate.h"
X
XGeom *NewAggregate();
Xchar yyfilename[BUFSIZ];            /* Input filename */
XGeomList *Defstack;                /* Geom definition stack. */
Xint Npoints = 0;                /* # of points in Polypoints */
XSurface *tmpsurf;                /* Working surface */
XSurfList *CurSurf;
XTexture *CurText;                /* Working list of textures */
XImageText *Imagetext;                /* Working image texture */
XTrans *TransHead, *TransTail;            /* Linked list of current transformations */
XAtmosphere *CurEffect = (Atmosphere *)NULL;    /* Current atmos. effects */
XPointList *Polypoints;                /* List of vertices */
XMetaList *Metapoints, *Metapoint;
Xextern FILE *yyin;                /* input file pointer */
Xextern int yylineno;                /* Current line # in file */
Xextern Atmosphere *AtmosEffects;        /* atmospheric effects */
Xextern Medium TopMedium;            /* "air" */
Xextern void    GeomAddToDefined(),
X        LightAddToDefined(),
X        SurfaceAddToDefined();
Xextern Surface    *SurfaceGetNamed();
Xextern Geom     *GeomGetNamed();
X%}
X%union {
X    char *c;
X    int i;
X    Float d;
X    Vector v;
X    Vec2d uv;
X    Color col;
X    Atmosphere *atmos;
X    Light *light;
X    Surface *surf;
X    Geom *obj;
X    Texture *text;
X    Mapping *map;
X    Trans *trans;
X    Expr *e;
X    SymtabEntry *sym;
X}
X%token <d> tFLOAT
X%token <c> tSTRING tFILENAME
X%token tAPERTURE tAPPLYSURF
X%token tBACKGROUND tBLOB tBLOTCH tBOX tBUMP tCONE tCYL tDIRECTIONAL tCURSURF
X%token tEXTENDED tEYEP tFBM tFBMBUMP tFOCALDIST tFOG tFOGDECK tFOV tGLOSS tGRID
X%token tHEIGHTFIELD tLIGHT tLIST tLOOKP tMARBLE tMAXDEPTH tMIST
X%token tJITTER tNOJITTER tDEFINE
X%token tOBJECT tOUTFILE  tSKY tDISC tDIFFERENCE tUNION tINTERSECT
X%token tPLANE tPOINT tPOLY tROTATE tSPOT tPRINT
X%token tSCALE tSCREEN tSPHERE tSURFACE
X%token tTHRESH tTRANSLATE tTRANSFORM tTRIANGLE tTRIANGLEUV tUP tEND
X%token tTEXTURE tCHECKER tWOOD tCONTRAST tCUTOFF tCLOUD
X%token tAMBIENT tDIFFUSE tREFLECT tTRANSP tSPECULAR tSPECPOW
X%token tINDEX tATMOSPHERE tNOSHADOW tAREA tTRANSLU tTORUS
X%token tEYESEP tSHADOWTRANSP tREPORT tVERBOSE tQUIET tWINDOW tSTRIPE
X%token tMAP tUV tSPHERICAL tCYLINDRICAL tPLANAR
X%token tIMAGE tSMOOTH tCOMPONENT tTEXTSURF tRANGE tTILE tSTARTTIME tFRAMELENGTH
X%token tNAME tFILTER tGAUSS tBODY tSAMPLE tEXTINCT tWINDY tMOUNT
X%token tSHUTTER tFRAMES
X%type <c> Filename
X%type <e> AnimExpr MExpr ParenExpr
X%type <d> Expr Float
X%type <v> Vector
X%type <uv> Vec2d
X%type <col> Color Intensity Lightdef
X%type <text> Texturetype
X%type <i> SurfCompName IExpr CombineOp
X%type <atmos> EffectType
X%type <light> LightType
X%type <obj> PrimType Primitive TransTextObj
X%type <obj> Csg Aggregate Object TransObj ObjType
X%type <obj> Blob Box Cone Cylinder Disc HeightField Plane Poly
X%type <obj> Sphere Triangle Torus AggregateType List Grid AggregateCreate
X%type <obj> NamedObject
X%type <surf> Surface OptSurface NamedSurf
X%type <surf> SurfSpec ModifyNamedSurf
X%type <map> Mapping MapMethod OptMapping
X%type <trans> TransformType
X%type <sym> Symtabent
X
X%left '+' '-'
X%left '*' '/' '%'
X%left UMINUS
X%right '^'
X%%
XItems        : /* empty */
X        | Items Item
X        ;
XItem        : Eyep
X        | Lookp
X        | Up
X        | Fov
X        | Screen
X        | Window
X        | Report
X        | Aperture
X        | Focaldist
X        | Eyesep
X        | Maxdepth
X        | Sample
X        | Filter
X        | Contrast
X        | Cutoff
X        | Background
X        | Shadowtransp
X        | Light
X        | SurfDef
X        | CurSurf
X        | Outfile
X        | Instance
X        | NameObject
X        | GlobalEffects
X        | Define
X        | Frames
X        | Starttime
X        | Shutter
X        | Framelength
X            | Print
X        ;
XInstance    : TransTextObj
X        {
X            if ($1) {
X                /*
X                 * Add instance to current object.
X                 */
X                $1->next = Defstack->obj->next;
X                Defstack->obj->next = $1;
X            }
X        }
XTransTextObj    : TransObj Textures
X        {
X            if ($$ && CurText) {
X                $$->texture = TextAppend(CurText, $$->texture);
X            }
X            CurText = (Texture *)NULL;
X        }
X        ;
XTransObj    : Object Transforms
X        {
X            $$ = $1;
X            if ($$ != (Geom *)NULL) {
X                if (TransHead) {
X                    $$->trans = TransHead;
X                    $$->transtail = TransTail;
X                    /*
X                     * We compose non-animated tranformation lists,
X                     * so we're only animated if it's one long,
X                     * or it's animated itself.
X                     */
X                    if ($$->trans->assoc || $$->trans->next)
X                        /* geometry is animated...*/
X                        $$->animtrans = TRUE;
X                }
X            }
X        }
X        ;
XObject        : ObjType
X        {
X            if ($$)
X                StatsAddRep($$);
X        }
X        | NamedObject
X        ;
XObjType        : Primitive
X        | Aggregate
X        ;
XPrimitive    : PrimType
X        {
X            if ($$)
X                $$->prims = 1;    /* one primitive */
X        }
X        ;
XPrimType    : Plane
X        | Sphere
X        | Box
X        | Triangle
X        | Cylinder
X        | Cone
X        | Poly
X        | HeightField
X        | Disc
X        | Torus
X        | Blob
X        ;
XNameObject    : tNAME tSTRING TransTextObj
X        {
X            if ($3) {
X                $3->name = $2;
X                GeomAddToDefined($3);
X            }
X        };
XAggdefs        : Aggdefs Aggdef
X        |
X        ;
XAggdef        : Instance
X        | SurfDef
X        | CurSurf
X        | NameObject
X        ;
XTextures    : Textures Texture
X        |
X        ;
XTexture        : tTEXTURE Texturetype Transforms
X        {
X            if ($2 != (Texture *)NULL) {
X                /*
X                 * Set transformation information.
X                 */
X                if (TransHead) {
X                    $2->trans = TransHead;
X                    /*
X                     * We compose non-animated tranformation lists,
X                     * so we're only animated if it's one long,
X                     * or it's animated itself.
X                     */
X                    if ($2->trans->assoc || $2->trans->next)
X                        /* texture transformation is animated...*/
X                        $2->animtrans = TRUE;
X                }
X                /*
X                 * Walk to the end of list of textures and
X                 * append new texture.  This is done so that
X                 * textures are applied in the expected order.
X                 */
X                CurText = TextAppend($2, CurText);
X            }
X        }
X        ;
XTexturetype    : tCHECKER Surface
X        {
X            $$ = TextCheckerCreate($2);
X        }
X        | tBLOTCH Expr Surface
X        {
X            $$ = TextBlotchCreate($2, $3);
X        }
X        | tBUMP Expr
X        {
X            $$ = TextBumpCreate($2);
X        }
X        | tMARBLE
X        {
X            $$ = TextMarbleCreate((char *)NULL);
X        }
X        | tMARBLE Filename
X        {
X            $$ = TextMarbleCreate($2);
X        }
X        | tFBM Expr Expr Expr Expr IExpr Expr
X        {
X            $$ = TextFBmCreate($2, $3, $4, $5, $6, $7,
X                        (char *)NULL);
X        }
X        | tFBM Expr Expr Expr Expr IExpr Expr Filename
X        {
X            $$ = TextFBmCreate($2, $3, $4, $5, $6, $7, $8);
X        }
X        | tFBMBUMP Expr Expr Expr Expr IExpr
X        {
X            $$ = TextFBmBumpCreate($2, $3, $4, $5, $6);
X        }
X        | tWOOD
X        {
X            $$ = TextWoodCreate();
X        }
X        | tGLOSS Expr
X        {
X            $$ = TextGlossCreate($2);
X        }
X        | tCLOUD Expr Expr Expr IExpr Expr Expr Expr
X        {
X            $$ = TextCloudCreate($2, $3, $4, $5, $6, $7, $8);
X        }
X        | tSKY Expr Expr Expr IExpr Expr Expr
X        {
X            $$ = TextSkyCreate($2, $3, $4, $5, $6, $7);
X        }
X        | ImageText
X        {
X            /*
X             * Image texturing has so many options
X             * that specification is keyword-based.
X             */
X            if (Imagetext->image == (Image *)NULL)
X                $$ = (Texture *)NULL;
X            else
X                $$ = TextCreate(Imagetext, ImageTextApply);
X            Imagetext = (ImageText *)NULL;
X        }
X        | tSTRIPE Surface Expr Expr OptMapping
X        {
X            $$ = TextStripeCreate($2, $3, $4, $5);
X        }
X        | tWINDY Expr Expr Expr Expr IExpr Expr Expr Expr
X        {
X            $$ = TextWindyCreate($2, $3, $4, $5, $6, $7, $8, $9);
X        }
X        | tMOUNT Filename Expr Expr
X        {
X            $$ = TextMountCreate($2, $3, $4);
X        }
X        ;
XImageText    : ImageTextType ImageTextOptions
X        ;
XImageTextType    : tIMAGE Filename
X        {
X            Imagetext = ImageTextCreate($2);
X        }
X        ;
XImageTextOptions: ImageTextOptions ImageTextOption
X        | /* EMPTY */
X        ;
XImageTextOption: tCOMPONENT SurfCompName
X        {
X            /* set texture to modify given component */
X            ImageTextSetComponent(Imagetext, $2);
X        }
X        | tTILE Expr Expr
X        {
X            Imagetext->tileu = $2;
X            Imagetext->tilev = $3;
X        }
X        | tTEXTSURF Surface
X        {
X            Imagetext->surf = $2;
X        }
X        | tRANGE Expr Expr
X        {
X            Imagetext->hi = $2;
X            Imagetext->lo = $3;
X        }
X        | tSMOOTH
X        {
X            Imagetext->smooth = TRUE;
X        }
X        | Mapping
X        {
X            Imagetext->mapping = $1;
X        };
XNamedObject    : tOBJECT Surface tSTRING
X        {
X            Geom *otmp;
X            /*
X             * Create an instance of the named object.
X             */
X            otmp = GeomGetNamed($3);
X            if (otmp == (Geom *)NULL)
X                RLerror(RL_PANIC,
X                  "There is no object named \"%s\".", $3);
X            $$ = GeomInstanceCreate(otmp);
X            $$->surf = $2;
X            $$->prims = otmp->prims;
X        }
X        | tOBJECT tSTRING
X        {
X            Geom *otmp;
X
X            otmp = GeomGetNamed($2);
X            if (otmp == (Geom *)NULL)
X                RLerror(RL_PANIC,
X                  "There is no object named \"%s\".", $2);
X            $$ = GeomInstanceCreate(otmp);
X            $$->surf = CurSurf->surf;
X            $$->prims = otmp->prims;
X        };
XTransforms    : Transforms PostTransform
X        | /* empty */
X        {
X            TransHead = TransTail = (Trans *)NULL;
X        };
XPostTransform    : TransformType
X        {
X            if (TransHead == (Trans *)NULL) {
X                /* we're the list, head and tail */
X                TransHead = TransTail = $1;
X            } else {
X                if ($1->animated || TransTail->animated) {
X                    /* new tail */
X                    $1->prev = TransTail;
X                    TransTail->next = $1;
X                    TransTail = $1;
X                } else {
X                    /* collapse with tail */
X                    TransCompose(TransTail, $1, TransTail);
X                    TransFree($1);
X                }
X            }
X        }
X        ;
XTransformType    : tSCALE AnimExpr AnimExpr AnimExpr
X        {
X            $$ = TransScaleCreate();
X            TransScaleSetX($$, $2);
X            TransScaleSetY($$, $3);
X            TransScaleSetZ($$, $4);
X            if (!$$->animated)
X                TransPropagate($$);
X
X        }
X        | tTRANSLATE AnimExpr AnimExpr AnimExpr
X        {
X            $$ = TransTranslateCreate();
X            TransTranslateSetX($$, $2);
X            TransTranslateSetY($$, $3);
X            TransTranslateSetZ($$, $4);
X            if (!$$->animated)
X                TransPropagate($$);
X        }
X        | tROTATE AnimExpr AnimExpr AnimExpr AnimExpr
X        {
X            $$ = TransRotateCreate();
X            TransRotateSetX($$, $2);
X            TransRotateSetY($$, $3);
X            TransRotateSetZ($$, $4);
X            TransRotateSetTheta($$, $5);
X            if (!$$->animated)
X                TransPropagate($$);
X        };
XEyep        : tEYEP Vector Transforms
X        {
X            Camera.pos = $2;
X            /*
X             * Eye can be transformed...
X            if (CurMatrix) {
X                PointTransform(&Camera.pos, CurMatrix);
X                free((voidstar)CurMatrix);
X                CurMatrix = (Matrix*)NULL;
X            }
X             */
X        }
X        ;
XLookp        : tLOOKP Vector
X        {
X            Camera.lookp = $2;
X        }
X        ;
XUp        : tUP Vector
X        {
X            Camera.up = $2;
X        }
X        ;
XFov        : tFOV Expr Expr
X        {
X            Camera.hfov = $2;
X            Camera.vfov = $3;
X        }
X        | tFOV Expr
X        {
X            Camera.hfov = $2;
X            Camera.vfov = UNSET;
X        }
X        ;
XSample        : tSAMPLE IExpr tJITTER
X        {
X            if (!Options.samples_set)
X                Options.samples = $2;
X            if (!Options.jitter_set)
X                Options.jitter = TRUE;
X        }
X        | tSAMPLE IExpr tNOJITTER
X        {
X            if (!Options.samples_set)
X                Options.samples = $2;
X            if (!Options.jitter_set)
X                Options.jitter = FALSE;
X        }
X        | tSAMPLE IExpr
X        {
X            if (!Options.samples_set)
X                Options.samples = $2;
X        }
X        ;
XFilter        : tFILTER tBOX Expr
X        {
X            Options.gaussian = FALSE;
X            Options.filterwidth = $3;
X        }
X        | tFILTER tBOX
X        {
X            Options.gaussian = FALSE;
X        }
X        | tFILTER tGAUSS Expr
X        {
X            Options.gaussian = TRUE;
X            Options.filterwidth = $3;
X        }
X        | tFILTER tGAUSS
X        {
X            Options.gaussian = TRUE;
X        };
XStarttime    : tSTARTTIME Expr
X        {
X            Options.starttime = $2;
X        };
XFrames        : tFRAMES IExpr
X        {
X            if (!Options.totalframes_set)
X                Options.totalframes = $2;
X        };
XFramelength    : tFRAMELENGTH Expr
X        {
X            Options.framelength = $2;
X        };
XShutter        : tSHUTTER Expr
X        {
X            Options.shutterspeed = $2;
X        };
XContrast    : tCONTRAST Expr Expr Expr
X        {
X            if (!Options.contrast_set) {
X                Options.contrast.r = $2;
X                Options.contrast.g = $3;
X                Options.contrast.b = $4;
X            }
X        }
X        ;
XCutoff        : tCUTOFF Intensity
X        {
X            if (!Options.cutoff_set)
X                Options.cutoff = $2;
X        }
X        ;
XScreen        : tSCREEN IExpr IExpr
X        {
X            if (!Options.resolution_set) {
X                Screen.xres = $2;
X                Screen.yres = $3;
X            }
X        }
X        ;
XWindow        : tWINDOW Expr Expr Expr Expr
X        {
X            if (!Options.window_set) {
X                Options.xmin = $2;
X                Options.xmax = $3;
X                Options.ymin = $4;
X                Options.ymax = $5;
X            }
X        }
XReport        : tREPORT Verbose Quiet IExpr Filename
X        {
X            if (!Options.freq_set)
X                Options.report_freq = $4;
X            if (Options.statsname == (char *)NULL)
X                Options.statsname = strsave($5);
X        }
X        | tREPORT Verbose Quiet IExpr
X        {
X            if (!Options.freq_set)
X                Options.report_freq = $4;
X        }
X        | tREPORT Verbose Quiet Filename
X        {
X            if (Options.statsname == (char *)NULL)
X                Options.statsname = strsave($4);
X        }
X        | tREPORT Verbose Quiet
X        ;
XVerbose        : tVERBOSE
X        { Options.verbose = TRUE; }
X        |
X        ;
XQuiet        : tQUIET
X        { Options.quiet = TRUE; }
X        |
X        ;
XAperture    : tAPERTURE Expr
X        {
X            Camera.aperture = $2;
X        }
X        ;
XFocaldist    : tFOCALDIST Expr
X        {
X            Camera.focaldist = $2;
X        }
X        ;
XEyesep        : tEYESEP Expr
X        {
X            if (!Options.eyesep_set)
X                Options.eyesep = $2;
X        }
X        ;
XMaxdepth    : tMAXDEPTH IExpr
X        {
X            if (!Options.maxdepth_set)
X                Options.maxdepth = $2;
X        }
X        ;
XBackground    : tBACKGROUND Color
X        {
X            Screen.background = $2;
X        }
X        ;
XShadowtransp    : tSHADOWTRANSP
X        {
X            Options.shadowtransp = TRUE;
X        }
X        ;
XLight        : LightType
X        {
X            LightAddToDefined($1);
X        }
X        | LightType tNOSHADOW
X        {
X            $1->shadow = FALSE;
X            LightAddToDefined($1);
X        }
X        | tLIGHT Intensity tAMBIENT
X        {
X            Options.ambient = $2;
X        }
X        | Lightdef tAREA Vector Vector IExpr Vector IExpr
X        {
X            extern void AreaLightCreate();
X            /* Area light is strange in that the
X             * Creation routine does the installation.
X             */
X            AreaLightCreate(&$1, &$3, &$4, $5, &$6, $7, TRUE);
X        }
X        | Lightdef tAREA Vector Vector IExpr Vector IExpr tNOSHADOW
X        {
X            extern void AreaLightCreate();
X            /* Area light is strange in that the
X             * Creation routine does the installation.
X             */
X            AreaLightCreate(&$1, &$3, &$4, $5, &$6, $7, FALSE);
X        };
XLightType    : Lightdef tPOINT Vector
X        {
X            $$ = LightPointCreate(&$1, &$3);
X        }
X        | Lightdef tDIRECTIONAL Vector
X        {
X            $$ = LightInfiniteCreate(&$1, &$3);
X        }
X        | Lightdef tEXTENDED Expr Vector
X        {
X            $$ = LightExtendedCreate(&$1, $3, &$4);
X        }
X        | Lightdef tSPOT Vector Vector Expr
X        {
X            $$ = LightSpotCreate(&$1, &$3, &$4, $5, 0., 0.);
X        }
X        | Lightdef tSPOT Vector Vector Expr Expr Expr
X        {
X            /* light <intens> spot from <to> coef inner_rad
X                    outer_rad */
X            $$ = LightSpotCreate(&$1, &$3, &$4, $5, $6, $7);
X        };
XLightdef    : tLIGHT Intensity
X        {
X            $$ = $2;
X        }
X        ;
XCurSurf        : tAPPLYSURF Surface
X        {
X            CurSurf->surf = $2;
X        }
X        ;
XOptSurface    : Surface
X        | /* EMPTY */
X        {
X            $$ = CurSurf->surf;
X        }
X        ;
XSurface        : NamedSurf
X        | ModifyNamedSurf
X        | SurfSpec
X        ;
XNamedSurf    : tSTRING
X        {
X            $$ = SurfaceGetNamed($1);
X            /*
X             * Free up memory allocated for surf name.
X             * We bother doing this because for large models
X             * converted from 3.0, surfnames this can account
X             * for lots o' bytes.
X             */
X            free((voidstar)$1);
X        }
X        | tCURSURF
X        {
X            extern Surface DefaultSurface;
X
X            if (CurSurf->surf)
X                $$ = CurSurf->surf;
X            else
X                $$ = &DefaultSurface;
X        }
X        ;
XModifyNamedSurf : CopyNamedSurf SurfComponent SurfComponents
X        {
X            $$ = tmpsurf;
X            tmpsurf = (Surface *)NULL;
X        }
X        | CopyCurSurf SurfComponent SurfComponents
X        {
X            $$ = tmpsurf;
X            tmpsurf = (Surface *)NULL;
X        }
X        ;
XCopyNamedSurf    : tSTRING
X        {
X            tmpsurf = SurfaceCopy(SurfaceGetNamed($1));
X        }
X        ;
XCopyCurSurf    : tCURSURF
X        {
X            extern Surface DefaultSurface;
X            if (CurSurf->surf)
X                tmpsurf = SurfaceCopy(CurSurf->surf);
X            else
X                tmpsurf = SurfaceCopy(&DefaultSurface);
X        }
X        ;
XSurfSpec    : SurfComponent SurfComponents
X        {
X            $$ = tmpsurf;
X            tmpsurf = (Surface *)NULL;
X        }
X        ;
XSurfDef        : tSURFACE tSTRING Surface
X        {
X            tmpsurf = SurfaceCopy($3);
X            tmpsurf->name = strsave($2);
X            SurfaceAddToDefined(tmpsurf);
X            tmpsurf = (Surface *)NULL;
X        }
X        | tSURFACE tSTRING
X        {
X            /* black surface */
X            tmpsurf = SurfaceCreate();
X            tmpsurf->name = strsave($2);
X            SurfaceAddToDefined(tmpsurf);
X            tmpsurf = (Surface *)NULL;
X        }
X        ;
XSurfComponents    : SurfComponents SurfComponent
X        | /* EMPTY */
X        ;
XSurfComponent    : Ambient
X        | Diffuse
X        | Specular
X        | Specpow
X        | Body
X        | Reflect
X        | Transp
X        | Extinct
X        | Index
X        | Translu
X        | Noshadow
X        ;
XAmbient        : tAMBIENT Color
X        {
X            if (tmpsurf == (Surface *)NULL)
X                tmpsurf = SurfaceCreate();
X            tmpsurf->amb = $2;
X        }
X        ;
XDiffuse        : tDIFFUSE Color
X        {
X            if (tmpsurf == (Surface *)NULL)
X                tmpsurf = SurfaceCreate();
X            tmpsurf->diff = $2;
X        }
X        ;
XSpecular    : tSPECULAR Color
X        {
X            if (tmpsurf == (Surface *)NULL)
X                tmpsurf = SurfaceCreate();
X            tmpsurf->spec = $2;
X        }
X        ;
XBody        : tBODY Color
X        {
X            if (tmpsurf == (Surface *)NULL)
X                tmpsurf = SurfaceCreate();
X            tmpsurf->body = $2;
X        };
XExtinct        : tEXTINCT Expr
X        {
X            if (tmpsurf == (Surface *)NULL)
X                tmpsurf = SurfaceCreate();
X            tmpsurf->statten = $2;
X        };
XSpecpow        : tSPECPOW Expr
X        {
X            if (tmpsurf == (Surface *)NULL)
X                tmpsurf = SurfaceCreate();
X            tmpsurf->srexp = $2;
X        }
X        ;
XReflect        : tREFLECT Expr
X        {
X            if (tmpsurf == (Surface *)NULL)
X                tmpsurf = SurfaceCreate();
X            tmpsurf->reflect = $2;
X        }
X        ;
XTransp        : tTRANSP Expr
X        {
X            if (tmpsurf == (Surface *)NULL)
X                tmpsurf = SurfaceCreate();
X            tmpsurf->transp = $2;
X        }
X        ;
XIndex        : tINDEX Expr
X        {
X            if (tmpsurf == (Surface *)NULL)
X                tmpsurf = SurfaceCreate();
X            tmpsurf->index = $2;
X        }
X        ;
XTranslu        : tTRANSLU Expr Color Expr
X        {
X            if (tmpsurf == (Surface *)NULL)
X                tmpsurf = SurfaceCreate();
X            tmpsurf->translucency = $2;
X            tmpsurf->translu = $3;
X            tmpsurf->stexp = $4;
X        }
X        ;
XNoshadow    : tNOSHADOW
X        {
X            if (tmpsurf == (Surface *)NULL)
X                tmpsurf = SurfaceCreate();
X            tmpsurf->noshadow = TRUE;
X        }
X        ;
XHeightField    : tHEIGHTFIELD Surface Filename
X        {
X            $$ = GeomHfCreate($3);
X            if ($$)
X                $$->surf = $2;
X        }
X        | tHEIGHTFIELD Filename
X        {
X            $$ = GeomHfCreate($2);
X        }
X        ;
XPoly        : tPOLY OptSurface Polypoints
X        {
X            $$ = GeomPolygonCreate(Polypoints, Npoints,
X                Options.flipnorm);
X            if ($$)
X                $$->surf = $2;
X            Polypoints = (PointList *)NULL;
X            Npoints = 0;
X        }
X        ;
XPolypoints    : /* empty */
X        | Polypoints Polypoint
X        ;
XPolypoint    : Vector
X        {
X            PointList *ptmp;
X
X            ptmp = (PointList *)Malloc(sizeof(PointList));
X            ptmp->vec = $1;
X            ptmp->next = Polypoints;
X            Polypoints = ptmp;
X            Npoints++;
X        }
X        ;
XAggregate    : AggregateDef
X        {
X            if (Defstack->obj) {
X                /*
X                 * Set object texture to current texture.
X                 */
X                Defstack->obj->texture = CurText;
X            }
X            CurText = (Texture *)NULL;
X            /*
X             * Pop topmost object on stack.
X             */
X            $$ = Defstack->obj;
X            Defstack = GeomStackPop(Defstack);
X            /* Pop current surface */
X            CurSurf = SurfPop(CurSurf);
X        }
X        ;
XAggregateDef    : AggregateCreate Aggdefs tEND
X        {
X            /* Convert aggregate, pop stacks, etc. */
X            if ($1) {
X                if (Defstack->obj->next == (Geom *)NULL) {
X                    RLerror(RL_WARN,
X                        "Null object defined.\n");
X                    Defstack->obj = (Geom *)NULL;
X                } else {
X                    /*
X                     * Convert the linked list of objects
X                     * associated with the topmost object
X                     * to the appropriate aggregate type.
X                     */
X                    Defstack->obj->prims=AggregateConvert(
X                        Defstack->obj,
X                        Defstack->obj->next);
X                    /*
X                     * Make sure conversion worked OK.
X                     */
X                    if (Defstack->obj->prims <= 0)
X                        Defstack->obj = (Geom *)NULL;
X                }
X            }
X        }
X        ;
XAggregateCreate    : AggregateType
X        {
X            if ($1) {
X                Defstack = GeomStackPush($1, Defstack);
X                CurSurf = SurfPush((Surface *)NULL, CurSurf);
X            }
X        };
XAggregateType    : List
X        | Grid
X        | Csg
X        ;
XList        : tLIST
X        {
X            $$ = GeomListCreate();
X        }
X        ;
XGrid        : tGRID IExpr IExpr IExpr
X        {
X            $$ = GeomGridCreate($2, $3, $4);
X        }
X        ;
XCsg        : CombineOp
X        {
X            $$ = GeomCsgCreate($1);
X            Options.csg = TRUE;
X        }
X        ;
XCombineOp    : tUNION
X        {
X            $$ = CSG_UNION;
X        }
X        | tINTERSECT
X        {
X            $$ = CSG_INTERSECT;
X        }
X        | tDIFFERENCE
X        {
X            $$ = CSG_DIFFERENCE;
X        }
X            ;
XCone        : tCONE OptSurface Expr Vector Expr Vector
X        {
X            if (equal($3, $5)) {
X                /* It's really a cylinder */
X                $$ = GeomCylinderCreate($3, &$4, &$6);
X            } else
X                $$ = GeomConeCreate($3, &$4, $5, &$6);
X            if ($$)
X                $$->surf = $2;
X        }
X        ;
XCylinder    : tCYL OptSurface Expr Vector Vector
X        {
X            $$ = GeomCylinderCreate($3, &$4, &$5);
X            if ($$)
X                $$->surf = $2;
X        }
X        ;
XSphere        : tSPHERE OptSurface Expr Vector
X        {
X            $$ = GeomSphereCreate($3, &($4));
X            if ($$)
X                $$->surf = $2;
X        }
X        ;
XDisc        : tDISC OptSurface Expr Vector Vector
X        {
X            $$ = GeomDiscCreate($3, &($4), &($5));
X            if ($$)
X                $$->surf = $2;
X        }
X        ;
XBox        : tBOX OptSurface Vector Vector
X        {
X            $$ = GeomBoxCreate(&$3, &$4);
X            if ($$)
X                $$->surf = $2;
X        }
X        ;
XTriangle    : tTRIANGLE OptSurface Vector Vector Vector
X        {
X            $$ = GeomTriangleCreate(FLATTRI, &($3), &($4), &($5),
X                (Vector *)NULL, (Vector *)NULL, (Vector *)NULL,
X                (Vec2d *)NULL, (Vec2d *)NULL, (Vec2d *)NULL,
X                Options.flipnorm);
X            if ($$)
X                $$->surf = $2;
X        }
X        | tTRIANGLE OptSurface  Vector Vector
X                    Vector Vector
X                    Vector Vector
X        {
X            $$ = GeomTriangleCreate(PHONGTRI, &($3), &($5),
X                &($7), &($4), &($6), &($8),
X                (Vec2d *)NULL, (Vec2d *)NULL, (Vec2d *)NULL,
X                Options.flipnorm);
X            if ($$)
X                $$->surf = $2;
X        }
X        | tTRIANGLEUV OptSurface Vector Vector Vec2d
X                     Vector Vector Vec2d
X                     Vector Vector Vec2d
X        {
X            $$ = GeomTriangleCreate(PHONGTRI, &($3), &($6), &($9),
X                        &($4), &($7), &($10),
X                        &($5), &($8), &($11),
X                        Options.flipnorm);
X            if ($$)
X                $$->surf = $2;
X        }
X        ;
XPlane        : tPLANE OptSurface Vector Vector
X        {
X            $$ = GeomPlaneCreate(&($3), &($4));
X            if ($$)
X                $$->surf = $2;
X        }
X        ;
XTorus        : tTORUS OptSurface Expr Expr Vector Vector
X        {
X            $$ = GeomTorusCreate($3, $4, &($5), &($6));
X            if ($$)
X                $$->surf = $2;
X        }
X        ;
XBlob        : tBLOB OptSurface Expr MetaPoints
X        {
X            $$ = GeomBlobCreate($3, Metapoints, Npoints);
X            if ($$)
X                $$->surf = $2;
X            Metapoints = (MetaList *)NULL;
X            Npoints = 0;
X        }
X        ;
XMetaPoints    : /* empty */
X        | MetaPoints MetaPoint
X        ;
XMetaPoint    : Expr Expr Expr Expr Expr
X        {
X            Metapoint = (MetaList *)Malloc(sizeof(MetaList));
X            Metapoint->mvec.c0 = $1;
X            Metapoint->mvec.rs = $2;
X            Metapoint->mvec.x = $3;
X            Metapoint->mvec.y = $4;
X            Metapoint->mvec.z = $5;
X            Metapoint->next = Metapoints;
X            Metapoints = Metapoint;
X            Npoints++;
X        }
X        ;
XOutfile        : tOUTFILE Filename
X        {
X            if (Options.imgname != (char *)NULL)
X                /* Already set on command line. */
X                RLerror(RL_WARN,
X                    "Ignoring output file name \"%s\".\n",
X                    $2);
X            else
X                Options.imgname = strsave($2);
X        }
X        ;
XGlobalEffects    : tATMOSPHERE Effects
X        {
X            AtmosEffects = CurEffect;
X            CurEffect = (Atmosphere *)NULL;
X        }
X        | tATMOSPHERE IExpr Effects
X        {
X            if ($2 <= 0.)
X                RLerror(RL_PANIC,
X                "Index of refraction must be positive.\n");
X            TopMedium.index = $2;
X            AtmosEffects = CurEffect;
X            CurEffect = (Atmosphere *)NULL;
X        }
X        ;
XEffects        : Effects Effect
X        |
X        ;
XEffect        : EffectType
X        {
X            $1->next = CurEffect;
X            CurEffect = $1;
X        }
X        ;
XEffectType    : tMIST Color Color Expr Expr
X        {
X            $$ = AtmosMistCreate(&($2), &($3), $4, $5);
X        }
X        | tFOG Color Color
X        {
X            $$ = AtmosFogCreate(&($2), &($3));
X        }
X        | tFOGDECK Expr Expr Vector Expr IExpr Color Color
X        {
X            $$ = AtmosFogdeckCreate($2, $3, &$4, $5, $6, &$7, &$8);
X        }
X        ;
XColor        : Expr Expr Expr
X        {
X            $$.r = $1;
X            $$.g = $2;
X            $$.b = $3;
X        }
X        ;
XVector        : Expr Expr Expr
X        {
X            $$.x = $1;
X            $$.y = $2;
X            $$.z = $3;
X        }
X        ;
XVec2d        : Expr Expr
X        {
X            $$.u = $1;
X            $$.v = $2;
X        }
X        ;
XOptMapping    : Mapping
X        | /* EMPTY */
X        {
X            $$ = UVMappingCreate();
X        }
X        ;
XMapping        : tMAP MapMethod
X        {
X            $$ = $2;
X        }
X        ;
XMapMethod    : tUV
X        {
X            $$ = UVMappingCreate();
X        }
X        | tSPHERICAL
X        {
X            $$ = SphereMappingCreate((Vector *)NULL,
X                (Vector *)NULL, (Vector *)NULL);
X        }
X        | tSPHERICAL Vector Vector Vector
X        {
X            /* origin up uaxis */
X            $$ = SphereMappingCreate(&$2, &$3, &$4);
X        }
X        | tCYLINDRICAL
X        {
X            $$ = CylMappingCreate((Vector *)NULL,
X                (Vector *)NULL, (Vector *)NULL);
X        }
X        | tCYLINDRICAL Vector Vector Vector
X        {
X            /* origin up uaxis */
X            $$ = CylMappingCreate(&$2, &$3, &$4);
X        }
X        | tPLANAR
X        {
X            $$ = LinearMappingCreate((Vector *)NULL,
X                (Vector *)NULL, (Vector *)NULL);
X        }
X        | tPLANAR Vector Vector Vector
X        {
X            /* origin up uaxis */
X            $$ = LinearMappingCreate(&$2, &$3, &$4);
X        }
X        ;
XSurfCompName    : tAMBIENT
X        {
X            $$ = AMBIENT;
X        }
X        | tDIFFUSE
X        {
X            $$ = DIFFUSE;
X        }
X        | tBODY
X        {
X            $$ = BODY;
X        }
X        | tSPECULAR
X        {
X            $$ = SPECULAR;
X        }
X        | tREFLECT
X        {
X            $$ = REFLECT;
X        }
X        | tTRANSP
X        {
X            $$ = TRANSP;
X        }
X        | tSPECPOW
X        {
X            $$ = SPECPOW;
X        }
X        | tBUMP
X        {
X            $$ = BUMP;
X        }
X        | tINDEX
X        {
X            $$ = INDEX;
X        }
X        ;
XIntensity    : Expr
X        { $$.r = $$.g = $$.b = $1; }
X        | Color
X        ;
XPrint        : tPRINT Expr
X        {
X            fprintf(stderr,"%f\n",$2);
X        }
XDefine        : tDEFINE tSTRING AnimExpr
X        {
X            SymtabAddEntry($2, $3->type, $3, NULL, $3->timevary, 0);
X        };
XIExpr        : Expr
X        { $$ = (int)$1; }
X        ;
XExpr        : Float
X        | ParenExpr
X        {
X            if (!$1->timevary) {
X                $$ = ExprEval($1);
X            } else {
X                RLerror(RL_PANIC, "Illegal expression use.\n");
X            }
X        }
X        ;
XAnimExpr    : Float
X        {
X            $$ = ExprReuseFloatCreate($1);
X        }
X        | ParenExpr
X        ;
XParenExpr    : '(' MExpr ')'
X        {
X            $$ = $2;
X        };
XMExpr        : tFLOAT
X        {
X            $$ = ExprFloatCreate($1, FALSE);
X        }
X        | tSTRING
X        {
X            $$ = ExprFloatSymtabFind($1);
X        }
X        | Symtabent '(' MExpr ')'
X        {
X            $$ = ExprResolve1($3, $1->value.fp, $1->timevary);
X        }
X        | Symtabent '(' MExpr ',' MExpr ')'
X        {
X            $$ = ExprResolve2($3, $5,
X                    $1->value.fp,
X                    $1->timevary);
X        }
X        | Symtabent '(' MExpr ',' MExpr ',' MExpr ')'
X        {
X            $$ = ExprResolve3($3, $5, $7,
X                    $1->value.fp,
X                    $1->timevary);
X        }
X        | Symtabent '(' MExpr ',' MExpr ',' MExpr ',' MExpr ')'
X        {
X            $$ = ExprResolve4($3, $5, $7, $9,
X                    $1->value.fp,
X                    $1->timevary);
X        }
X        | Symtabent
X            '(' MExpr ',' MExpr ',' MExpr ',' MExpr ',' MExpr ')'
X        {
X            $$ = ExprResolve5($3, $5, $7, $9, $11,
X                    $1->value.fp,
X                    $1->timevary);
X        }
X        | '(' MExpr ')'
X        {
X            $$ = $2;
X        }
X        | MExpr '+' MExpr
X        {
X            $$ = ExprResolve2($1, $3, SumExpr, FALSE);
X        }
X        | MExpr '-' MExpr
X        {
X            $$ = ExprResolve2($1, $3, DiffExpr, FALSE);
X        }
X        | MExpr '*' MExpr
X        {
X            $$ = ExprResolve2($1, $3, MultExpr, FALSE);
X        }
X        | MExpr '/' MExpr
X        {
X            $$ = ExprResolve2($1, $3, DivideExpr, FALSE);
X        }
X        | MExpr '%' MExpr
X        {
X            $$ = ExprResolve2($1, $3, ModExpr, FALSE);
X        }
X        | '-' MExpr %prec UMINUS
X        {
X            $$ = ExprResolve1($2, NegateExpr, FALSE);
X        }
X        | '+' MExpr %prec UMINUS
X        {
X            $$ = $2;
X        }
X        | MExpr '^' MExpr
X        {
X            $$ = ExprResolve2($1, $3, pow, FALSE);
X        } ;
XFloat        : tFLOAT
X        | '-' tFLOAT
X        { $$ = -$2; }
X        | '+' tFLOAT
X        { $$ = $2; };
XFilename    : tSTRING
X        | tFILENAME
X        ;
XSymtabent    : tSTRING
X        {
X            $$ = SymtabBuiltinFind($1);
X        };
X%%
X/*
X * Issue error message containing filename and line number, and exit.
X */
X/*VARARGS1*/
Xyyerror(s, pat1, pat2)
Xchar *s, *pat1, *pat2;
X{
X    fprintf(stderr,"%s: Error: %s: line %d: ", Options.progname,
X            yyfilename, yylineno);
X    fprintf(stderr, s, pat1, pat2);
X    if (*s && s[strlen(s) -1] != '\n')
X        /* YACC doesn't put newlines on error messages. */
X        fprintf(stderr,"\n");
X    fflush(stderr);
X    exit(1);
X}
X
XGeom *
XNewAggregate(obj)
XGeom *obj;
X{
X    obj->name = Defstack->obj->name;
X    obj->next = Defstack->obj->next;
X    return obj;
X}
END_OF_FILE
if test 28326 -ne `wc -c <'libshade/yacc.y'`; then
    echo shar: \"'libshade/yacc.y'\" unpacked with wrong size!
fi
# end of 'libshade/yacc.y'
fi
echo shar: End of archive 18 \(of 19\).
cp /dev/null ark18isdone
MISSING=""
for I in 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 ; do
    if test ! -f ark${I}isdone ; then
    MISSING="${MISSING} ${I}"
    fi
done
if test "${MISSING}" = "" ; then
    echo You have unpacked all 19 archives.
    rm -f ark[1-9]isdone ark[1-9][0-9]isdone
else
    echo You still need to unpack the following archives:
    echo "        " ${MISSING}
fi
##  End of shell archive.
exit 0

exit 0 # Just in case...