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#ifndef lint
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static const char RCSid[] = "$Id: rglinst.c,v 3.11 2003/07/12 09:55:13 schorsch Exp $";
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#endif
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/*
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* Routines for reading instances and converting to OpenGL.
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*/
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#include "copyright.h"
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#include <stdio.h>
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#include <string.h>
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#include <time.h>
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#include "platform.h"
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#include "resolu.h"
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#include "radogl.h"
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#include "octree.h"
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#define MAXLEVEL 16 /* maximum instance hierarchy level */
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typedef struct {
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int listid; /* our list id */
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short localmatl; /* uses local material only */
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FVECT cent; /* center of octree cube */
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char octfile[256]; /* octree file path */
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} OCTINST; /* octree to instantiate */
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static double ogetflt(void);
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static long ogetint(int);
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static char *ogetstr(char *);
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static int loadobj(void);
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static void skiptree(void);
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static void octerror(int etyp, char *msg);
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static OCTINST *getoct(char *);
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static char *infn; /* input file name */
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static FILE *infp; /* input file stream */
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static int objsize; /* size of stored OBJECT's */
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static short otypmap[NUMOTYPE+8]; /* object type map */
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static unsigned long imhash(mod) char *mod; {return((unsigned long)mod);}
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static LUTAB imtab = {imhash,NULL,NULL,NULL,0,NULL,0};
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static LUTAB ottab = LU_SINIT(free,free);
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int
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o_instance(o) /* convert instance to list call */
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register OBJREC *o;
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{
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XF xfs;
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register OCTINST *ot;
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/* set up */
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if (o->oargs.nsargs < 1)
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objerror(o, USER, "missing octree");
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setmaterial(NULL, NULL, 0);
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/* put out transform (if any) */
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if (o->oargs.nsargs > 1) {
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if (xf(&xfs, o->oargs.nsargs-1, o->oargs.sarg+1) !=
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o->oargs.nsargs-1)
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objerror(o, USER, "bad transform");
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glPushAttrib(GL_TRANSFORM_BIT);
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if (xfs.sca < 1.-FTINY | xfs.sca > 1.+FTINY)
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glEnable(GL_NORMALIZE);
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glMatrixMode(GL_MODELVIEW);
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glPushMatrix();
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/* matrix order works out to same */
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#ifdef SMLFLT
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glMultMatrixf((GLfloat *)xfs.xfm);
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#else
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glMultMatrixd((GLdouble *)xfs.xfm);
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#endif
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}
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ot = getoct(o->oargs.sarg[0]); /* get octree reference */
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if (ot->localmatl &= o->os != NULL) /* set material */
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setmaterial((MATREC *)o->os, ot->cent, 0);
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/* call the assigned list */
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glCallList(ot->listid);
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if (o->oargs.nsargs > 1) { /* end transform */
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glMatrixMode(GL_MODELVIEW);
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glPopMatrix();
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glPopAttrib();
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}
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rgl_checkerr("creating instance");
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return(0);
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}
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static int
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buildoctlist(lp) /* build octree list */
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LUENT *lp;
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{
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int old_dolights = dolights, old_domats = domats;
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register OCTINST *op = (OCTINST *)lp->data;
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domats = !op->localmatl; /* do materials only if needed */
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dolights = 0; /* never do light sources */
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glNewList(op->listid, GL_COMPILE);
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loadoct(op->octfile); /* load objects into display list */
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surfclean(); /* clean up */
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glEndList();
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dolights = old_dolights; /* restore */
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domats = old_domats;
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return(1); /* return success */
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}
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int
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loadoctrees() /* load octrees we've saved up */
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{
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int levelsleft = MAXLEVEL;
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int nocts = 0;
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LUTAB looptab;
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/* loop through new octree references */
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while (ottab.tsiz) {
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if (!levelsleft--)
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error(USER, "too many octree levels -- instance loop?");
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looptab = ottab;
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ottab.tsiz = 0;
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nocts += lu_doall(&looptab, buildoctlist);
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lu_done(&looptab);
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}
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return(nocts);
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}
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static OCTINST *
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getoct(name) /* get/assign octree list id */
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char *name;
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{
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char *path;
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register LUENT *lp;
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register OCTINST *op;
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if ((lp = lu_find(&ottab, name)) == NULL)
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goto memerr;
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if (lp->key == NULL) {
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lp->key = (char *)malloc(strlen(name)+1);
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if (lp->key == NULL)
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goto memerr;
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strcpy(lp->key, name);
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}
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if ((op = (OCTINST *)lp->data) == NULL) {
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path = getpath(name, getrlibpath(), R_OK);
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if (path == NULL) {
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sprintf(errmsg, "cannot find octree \"%s\"", name);
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error(USER, errmsg);
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}
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op = (OCTINST *)(lp->data = (char *)malloc(sizeof(OCTINST)));
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strcpy(op->octfile, path);
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checkoct(op->octfile, op->cent);
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op->listid = newglist();
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op->localmatl = ~0;
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}
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return(op);
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memerr:
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error(SYSTEM, "out of memory in getoct");
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}
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double
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checkoct(fname, cent) /* check octree file for validity */
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char *fname;
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FVECT cent;
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{
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char sbuf[64];
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FILE *fp = infp;
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char *fn = infn;
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double siz = 0.;
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register int i;
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if ((infp = fopen(infn=fname, "r")) == NULL) {
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sprintf(errmsg, "cannot open octree file \"%s\"", fname);
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error(SYSTEM, errmsg);
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}
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SET_FILE_BINARY(infp);
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/* get header */
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if (checkheader(infp, OCTFMT, NULL) < 0)
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octerror(USER, "not an octree");
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/* check format */
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if ((objsize = ogetint(2)-OCTMAGIC) <= 0 ||
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objsize > MAXOBJSIZ || objsize > sizeof(long))
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octerror(USER, "incompatible octree format");
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if (cent != NULL) { /* get boundaries (compute center) */
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for (i = 0; i < 3; i++)
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cent[i] = atof(ogetstr(sbuf));
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siz = atof(ogetstr(sbuf))*.5;
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cent[0] += siz; cent[1] += siz; cent[2] += siz;
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} else { /* get size (radius) only */
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for (i = 0; i < 3; i++)
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ogetstr(sbuf);
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siz = atof(ogetstr(sbuf))*.5;
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}
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fclose(infp);
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infp = fp;
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infn = fn;
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return(siz);
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}
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int
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loadoct(fname) /* read in objects from octree */
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char *fname;
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{
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OBJECT fnobjects;
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char sbuf[256];
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int nf;
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register int i;
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long m;
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infn = fname;
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infp = fopen(fname, "r"); /* assume already checked */
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SET_FILE_BINARY(infp);
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/* skip header */
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getheader(infp, NULL, NULL);
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/* get format */
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objsize = ogetint(2)-OCTMAGIC;
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/* skip boundaries */
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for (i = 0; i < 4; i++)
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ogetstr(sbuf);
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nf = 0; /* load object files */
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while (*ogetstr(sbuf)) {
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rgl_load(sbuf);
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nf++;
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}
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/* get number of objects */
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fnobjects = m = ogetint(objsize);
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if (fnobjects != m)
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octerror(USER, "too many objects");
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if (nf == 0) {
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skiptree();
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for (i = 0; *ogetstr(sbuf); i++)
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if ((otypmap[i] = otype(sbuf)) < 0) {
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sprintf(errmsg, "unknown type \"%s\"", sbuf);
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octerror(WARNING, errmsg);
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}
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lu_init(&imtab, 1000); nobjects = 0;
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while (loadobj() != OVOID)
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;
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lu_done(&imtab);
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if (nobjects != fnobjects)
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octerror(USER, "inconsistent object count");
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}
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fclose(infp);
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return(nf);
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}
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static char *
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ogetstr(s) /* get null-terminated string */
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char *s;
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{
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extern char *getstr();
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if (getstr(s, infp) == NULL)
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octerror(USER, "truncated octree");
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return(s);
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}
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static long
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ogetint(siz) /* get a siz-byte integer */
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int siz;
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{
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extern long getint();
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register long r;
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r = getint(siz, infp);
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if (feof(infp))
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octerror(USER, "truncated octree");
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return(r);
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}
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static double
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ogetflt() /* get a floating point number */
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{
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extern double getflt();
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double r;
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r = getflt(infp);
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if (feof(infp))
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octerror(USER, "truncated octree");
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return(r);
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}
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static void
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skiptree() /* skip octree on input */
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{
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register int i;
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switch (getc(infp)) {
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case OT_EMPTY:
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return;
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case OT_FULL:
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for (i = ogetint(objsize)*objsize; i-- > 0; )
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if (getc(infp) == EOF)
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octerror(USER, "truncated octree");
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return;
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case OT_TREE:
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for (i = 0; i < 8; i++)
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skiptree();
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return;
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case EOF:
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octerror(USER, "truncated octree");
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default:
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octerror(USER, "damaged octree");
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}
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}
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static int
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loadobj() /* get next object */
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{
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static OBJREC ob;
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char idbuf[MAXSTR], sbuf[MAXSTR];
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register LUENT *lep;
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register int i;
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register long m;
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/* get type */
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i = ogetint(1);
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if (i == -1)
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return(OVOID); /* terminator */
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if ((ob.otype = otypmap[i]) < 0)
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octerror(USER, "reference to unknown type");
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/* get modifier */
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if ((m = ogetint(objsize)) != OVOID && (OBJECT)m != m)
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octerror(USER, "too many objects");
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if ((ob.omod = m) != OVOID && domats) {
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if ((lep = lu_find(&imtab, (char *)m)) == NULL)
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goto memerr;
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ob.os = lep->data;
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} else
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ob.os = NULL;
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/* get name id */
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ob.oname = ogetstr(idbuf);
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/* get string arguments */
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if (ob.oargs.nsargs = ogetint(2)) {
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ob.oargs.sarg = (char **)malloc
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(ob.oargs.nsargs*sizeof(char *));
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if (ob.oargs.sarg == NULL)
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goto memerr;
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for (i = 0; i < ob.oargs.nsargs; i++)
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ob.oargs.sarg[i] = savestr(ogetstr(sbuf));
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} else
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ob.oargs.sarg = NULL;
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/* get integer arguments */
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#ifdef IARGS
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if (ob.oargs.niargs = ogetint(2)) {
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ob.oargs.iarg = (long *)malloc
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(ob.oargs.niargs*sizeof(long));
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if (ob.oargs.iarg == NULL)
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goto memerr;
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for (i = 0; i < ob.oargs.niargs; i++)
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ob.oargs.iarg[i] = ogetint(4);
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} else
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ob.oargs.iarg = NULL;
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#endif
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/* get real arguments */
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if (ob.oargs.nfargs = ogetint(2)) {
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ob.oargs.farg = (RREAL *)malloc
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| 365 |
(ob.oargs.nfargs*sizeof(RREAL));
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if (ob.oargs.farg == NULL)
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goto memerr;
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| 368 |
for (i = 0; i < ob.oargs.nfargs; i++)
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| 369 |
ob.oargs.farg[i] = ogetflt();
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| 370 |
} else
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| 371 |
ob.oargs.farg = NULL;
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/* process object */
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| 373 |
(*ofun[ob.otype].funp)(&ob);
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| 374 |
/* record material if modifier */
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| 375 |
if (ismodifier(ob.otype)) {
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| 376 |
if ((lep = lu_find(&imtab, (char *)nobjects)) == NULL)
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| 377 |
goto memerr;
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| 378 |
lep->key = (char *)nobjects;
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| 379 |
lep->data = (char *)getmatp(ob.oname);
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| 380 |
}
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| 381 |
freefargs(&ob.oargs); /* free arguments */
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| 382 |
return(nobjects++); /* return object id */
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| 383 |
memerr:
|
| 384 |
error(SYSTEM, "out of memory in loadobj");
|
| 385 |
}
|
| 386 |
|
| 387 |
|
| 388 |
static void
|
| 389 |
octerror(etyp, msg) /* octree error */
|
| 390 |
int etyp;
|
| 391 |
char *msg;
|
| 392 |
{
|
| 393 |
char msgbuf[128];
|
| 394 |
|
| 395 |
sprintf(msgbuf, "(%s): %s", infn, msg);
|
| 396 |
error(etyp, msgbuf);
|
| 397 |
}
|
