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/* Copyright (c) 1998 Silicon Graphics, Inc. */
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#ifndef lint
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static char SCCSid[] = "$SunId$ SGI";
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#endif
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/*
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* Load Radiance object(s) and create OpenGL display lists
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*/
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#include "radogl.h"
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#ifndef NLIST2ALLOC
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#define NLIST2ALLOC 16 /* batch of display lists to get */
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#endif
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extern int o_sphere(), o_face(), o_cone(), o_ring(),
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o_source(), o_instance();
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extern int m_normal(), m_glass(), m_aniso(), m_brdf(), m_brdf2(),
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m_light(), m_prism(), m_mirror();
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FUN ofun[NUMOTYPE] = INIT_OTYPE;
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static int nextlist, nlistleft = 0;
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static
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initotypes() /* initialize ofun array */
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{
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if (ofun[OBJ_SPHERE].funp == o_sphere)
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return; /* already done */
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/* assign surface types */
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ofun[OBJ_SPHERE].funp =
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ofun[OBJ_BUBBLE].funp = o_sphere;
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ofun[OBJ_FACE].funp = o_face;
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ofun[OBJ_CONE].funp =
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ofun[OBJ_CUP].funp =
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ofun[OBJ_CYLINDER].funp =
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ofun[OBJ_TUBE].funp = o_cone;
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ofun[OBJ_RING].funp = o_ring;
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ofun[OBJ_SOURCE].funp = o_source;
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ofun[OBJ_INSTANCE].funp = o_instance;
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/* assign material types */
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ofun[MAT_TRANS].funp =
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ofun[MAT_PLASTIC].funp =
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ofun[MAT_METAL].funp = m_normal;
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ofun[MAT_GLASS].funp =
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ofun[MAT_DIELECTRIC].funp =
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ofun[MAT_INTERFACE].funp = m_glass;
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ofun[MAT_PLASTIC2].funp =
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ofun[MAT_METAL2].funp =
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ofun[MAT_TRANS2].funp = m_aniso;
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ofun[MAT_TDATA].funp =
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ofun[MAT_PDATA].funp =
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ofun[MAT_MDATA].funp =
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ofun[MAT_TFUNC].funp =
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ofun[MAT_PFUNC].funp =
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ofun[MAT_MFUNC].funp = m_brdf;
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ofun[MAT_BRTDF].funp = m_brdf2;
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ofun[MAT_GLOW].funp =
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ofun[MAT_LIGHT].funp =
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ofun[MAT_SPOT].funp =
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ofun[MAT_ILLUM].funp = m_light;
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ofun[MAT_MIRROR].funp = m_mirror;
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ofun[MAT_DIRECT1].funp =
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ofun[MAT_DIRECT2].funp = m_prism;
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}
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int
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newglist() /* allocate an OGL list id */
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{
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if (!nlistleft--) {
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nextlist = glGenLists(NLIST2ALLOC);
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if (!nextlist)
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error(SYSTEM, "no list space left in newglist");
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nlistleft = NLIST2ALLOC-1;
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}
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return(nextlist++);
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}
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rgl_checkerr(where) /* check for GL or GLU error */
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char *where;
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{
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register GLenum errcode;
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while ((errcode = glGetError()) != GL_NO_ERROR) {
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sprintf(errmsg, "OpenGL error %s: %s",
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where, gluErrorString(errcode));
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error(WARNING, errmsg);
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}
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}
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int
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rgl_filelist(ic, inp, nl) /* load scene files into display list */
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int ic;
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char **inp;
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int *nl; /* returned number of lists (optional) */
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{
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int listid;
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initotypes(); /* prepare */
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listid = newglist();
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glNewList(listid, GL_COMPILE);
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lightinit(); /* start light source list */
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while (ic--) /* load each file */
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rgl_load(*inp++);
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surfclean(); /* clean up first pass */
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lightclean(); /* clean up light sources also */
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glEndList(); /* end of top display list */
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lightdefs(); /* define light sources */
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loadoctrees(); /* load octrees (sublists) for instances */
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if (nl != NULL) /* return total number of lists allocated */
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*nl = nextlist - listid;
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return(listid); /* all done -- return list id */
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}
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int
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rgl_octlist(fname, cent, radp, nl) /* load scen into display list */
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char *fname;
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FVECT cent; /* returned octree center (optional) */
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FLOAT *radp; /* returned octree size (optional) */
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int *nl; /* returned number of lists (optional) */
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{
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double r;
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int listid;
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/* modeled after rgl_filelist() */
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initotypes();
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/* check the octree and get its size */
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r = checkoct(fname, cent);
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if (radp != NULL) *radp = r;
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/* start the display list */
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listid = newglist();
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glNewList(listid, GL_COMPILE);
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lightinit(); /* start light source list */
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loadoct(fname); /* load octree objects into display list */
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surfclean(); /* clean up and close top list */
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lightclean(); /* clean up light sources also */
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glEndList(); /* close top list */
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lightdefs(); /* define light sources */
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loadoctrees(); /* load referenced octrees into sublists */
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if (nl != NULL) /* return total number of lists allocated */
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*nl = nextlist - listid;
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return(listid);
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}
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rgl_load(inpspec) /* convert scene description into OGL calls */
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char *inpspec;
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{
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FILE *popen();
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char *fgetline();
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FILE *infp;
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char buf[1024];
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register int c;
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if (inpspec == NULL) {
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infp = stdin;
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inpspec = "standard input";
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} else if (inpspec[0] == '!') {
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if ((infp = popen(inpspec+1, "r")) == NULL) {
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sprintf(errmsg, "cannot execute \"%s\"", inpspec);
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error(SYSTEM, errmsg);
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}
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} else if ((infp = fopen(inpspec, "r")) == NULL) {
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sprintf(errmsg, "cannot open scene file \"%s\"", inpspec);
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error(SYSTEM, errmsg);
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}
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while ((c = getc(infp)) != EOF) {
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if (isspace(c))
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continue;
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if (c == '#') { /* comment */
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fgets(buf, sizeof(buf), infp);
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} else if (c == '!') { /* command */
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ungetc(c, infp);
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fgetline(buf, sizeof(buf), infp);
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rgl_load(buf);
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} else { /* object */
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ungetc(c, infp);
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rgl_object(inpspec, infp);
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}
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}
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if (inpspec[0] == '!')
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pclose(infp);
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else
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fclose(infp);
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}
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rgl_object(name, fp) /* read the next object */
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char *name;
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FILE *fp;
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{
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static OBJREC ob;
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char sbuf[MAXSTR];
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int rval;
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/* get modifier */
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strcpy(sbuf, "EOF");
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fgetword(sbuf, MAXSTR, fp);
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ob.omod = 0; /* use ob.os for pointer to material */
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if (!strcmp(sbuf, VOIDID))
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ob.os = NULL;
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else
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ob.os = (char *)getmatp(sbuf);
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/* get type */
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strcpy(sbuf, "EOF");
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fgetword(sbuf, MAXSTR, fp);
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if (!strcmp(sbuf, ALIASID))
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ob.otype = -1;
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else if ((ob.otype = otype(sbuf)) < 0) {
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sprintf(errmsg, "(%s): unknown type \"%s\"", name, sbuf);
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error(USER, errmsg);
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}
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/* get identifier */
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sbuf[0] = '\0';
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fgetword(sbuf, MAXSTR, fp);
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ob.oname = sbuf;
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/* get arguments */
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if (ob.otype == -1) {
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char sbuf2[MAXSTR]; /* get alias */
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strcpy(sbuf2, "EOF");
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fgetword(sbuf2, MAXSTR, fp);
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if (ob.os == NULL)
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ob.os = (char *)getmatp(sbuf2);
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o_default(&ob); /* fake reference */
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return;
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}
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if ((rval = readfargs(&ob.oargs, fp)) == 0) {
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sprintf(errmsg, "(%s): bad arguments", name);
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objerror(&ob, USER, errmsg);
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} else if (rval < 0) {
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sprintf(errmsg, "(%s): error reading scene", name);
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error(SYSTEM, errmsg);
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}
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/* execute */
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(*ofun[ob.otype].funp)(&ob);
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/* free arguments */
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freefargs(&ob.oargs);
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}
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