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/* Copyright (c) 1998 Silicon Graphics, Inc. */ |
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|
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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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/* |
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* Load Radiance object(s) and create OpenGL display lists |
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*/ |
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|
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#include "radogl.h" |
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|
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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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|
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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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|
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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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|
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FUN ofun[NUMOTYPE] = INIT_OTYPE; |
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|
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static int nextlist, nlistleft = 0; |
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|
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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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} |
