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/* Copyright (c) 1987 Regents of the University of California */ |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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static const char RCSid[] = "$Id$"; |
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#endif |
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/* |
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* bbox.c - routines for bounding box computation. |
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* |
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* 8/4/87 |
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*/ |
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#include "copyright.h" |
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#include "standard.h" |
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#include "object.h" |
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#include "octree.h" |
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#include "otypes.h" |
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#include "face.h" |
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#include "instance.h" |
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#include "mesh.h" |
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add2bbox(o, bbmin, bbmax) /* expand bounding box to fit object */ |
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register OBJREC *o; |
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FVECT bbmin, bbmax; |
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{ |
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#define co ((CONE *)osp) |
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#define fo ((FACE *)osp) |
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#define io ((INSTANCE *)osp) |
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register char *osp; |
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CONE *co; |
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FACE *fo; |
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INSTANCE *io; |
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MESHINST *mi; |
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FVECT v; |
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register int i, j; |
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circle2bbox(CO_P1(co), co->ad, CO_R1(co), bbmin, bbmax); |
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break; |
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case OBJ_INSTANCE: |
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io = getinstance(o, GET_BOUNDS); |
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io = getinstance(o, IO_BOUNDS); |
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for (j = 0; j < 8; j++) { |
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for (i = 0; i < 3; i++) { |
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v[i] = io->obj->scube.cuorg[i]; |
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if (j & 1<<i) |
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v[i] += io->obj->scube.cusize; |
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} |
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multp3(v, v, io->f.xfm); |
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multp3(v, v, io->x.f.xfm); |
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point2bbox(v, bbmin, bbmax); |
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} |
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break; |
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case OBJ_MESH: |
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mi = getmeshinst(o, IO_BOUNDS); |
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for (j = 0; j < 8; j++) { |
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for (i = 0; i < 3; i++) { |
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v[i] = mi->msh->mcube.cuorg[i]; |
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if (j & 1<<i) |
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v[i] += mi->msh->mcube.cusize; |
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} |
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multp3(v, v, mi->x.f.xfm); |
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point2bbox(v, bbmin, bbmax); |
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} |
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break; |
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} |
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#undef co |
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#undef fo |
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#undef io |
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} |
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