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/* Copyright (c) 1988 Regents of the University of California */ |
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|
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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#endif |
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|
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/* |
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* instance.c - routines for octree objects. |
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* |
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* 11/10/88 |
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*/ |
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|
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#include "standard.h" |
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|
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#include "object.h" |
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|
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#include "instance.h" |
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|
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static SCENE *slist = NULL; /* list of loaded octrees */ |
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|
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|
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SCENE * |
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getscene(sname, flags) /* load octree sname */ |
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char *sname; |
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int flags; |
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{ |
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extern char *libpath; |
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char *pathname; |
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register SCENE *sc; |
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|
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flags &= ~IO_FILES; /* not allowed */ |
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for (sc = slist; sc != NULL; sc = sc->next) |
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if (!strcmp(sname, sc->name)) { |
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if ((sc->ldflags & flags) == flags) |
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return(sc); /* loaded */ |
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break; /* load the rest */ |
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} |
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if (sc == NULL) { |
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sc = (SCENE *)malloc(sizeof(SCENE)); |
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if (sc == NULL) |
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error(SYSTEM, "out of memory in getscene"); |
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sc->name = savestr(sname); |
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sc->ldflags = 0; |
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sc->next = slist; |
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slist = sc; |
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} |
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if ((pathname = getpath(sname, libpath, R_OK)) == NULL) { |
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sprintf(errmsg, "cannot find octree file \"%s\"", sname); |
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error(USER, errmsg); |
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} |
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readoct(pathname, flags & ~sc->ldflags, &sc->scube, NULL); |
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sc->ldflags |= flags; |
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return(sc); |
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} |
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|
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|
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INSTANCE * |
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getinstance(o, flags) /* get instance structure */ |
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register OBJREC *o; |
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int flags; |
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{ |
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register INSTANCE *in; |
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|
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if ((in = (INSTANCE *)o->os) == NULL) { |
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if ((in = (INSTANCE *)malloc(sizeof(INSTANCE))) == NULL) |
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error(SYSTEM, "out of memory in getinstance"); |
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if (o->oargs.nsargs < 1) |
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objerror(o, USER, "bad # of arguments"); |
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if (xf(in->f.xfm, &in->f.sca, o->oargs.nsargs-1, |
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o->oargs.sarg+1) != o->oargs.nsargs-1) |
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objerror(o, USER, "bad transform"); |
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if (in->f.sca < 0.0) |
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in->f.sca = -in->f.sca; |
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invxf(in->b.xfm, &in->b.sca,o->oargs.nsargs-1,o->oargs.sarg+1); |
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if (in->b.sca < 0.0) |
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in->b.sca = -in->b.sca; |
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in->obj = NULL; |
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o->os = (char *)in; |
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} |
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if (in->obj == NULL || (in->obj->ldflags & flags) != flags) |
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in->obj = getscene(o->oargs.sarg[0], flags); |
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return(in); |
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} |
