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greg |
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#ifndef lint
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static const char RCSid[] = "$Id$";
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#endif
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/*
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* Routines for writing compiled mesh to a file stream
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*/
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#include "standard.h"
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#include "octree.h"
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#include "object.h"
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#include "mesh.h"
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static void
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putfullnode(fn, fp) /* write out a full node */
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OCTREE fn;
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FILE *fp;
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{
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OBJECT oset[MAXSET+1];
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register int i;
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objset(oset, fn);
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for (i = 0; i <= oset[0]; i++)
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putint((long)oset[i], sizeof(OBJECT), fp);
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}
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static void
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puttree(ot, fp) /* write octree to fp in pre-order form */
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register OCTREE ot;
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FILE *fp;
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{
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if (istree(ot)) {
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register int i;
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putc(OT_TREE, fp); /* indicate tree */
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for (i = 0; i < 8; i++) /* write tree */
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puttree(octkid(ot, i), fp);
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return;
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}
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if (isfull(ot)) {
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putc(OT_FULL, fp); /* indicate fullnode */
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putfullnode(ot, fp); /* write fullnode */
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return;
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}
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putc(OT_EMPTY, fp); /* indicate empty */
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}
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static void
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putpatch(pp, fp) /* write out a mesh patch */
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register MESHPATCH *pp;
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FILE *fp;
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{
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int flags = MT_V;
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int i, j;
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/* vertex flags */
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if (pp->norm != NULL)
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flags |= MT_N;
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if (pp->uv != NULL)
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flags |= MT_UV;
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putint((long)flags, 1, fp);
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/* number of vertices */
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putint((long)pp->nverts, 2, fp);
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/* vertex xyz locations */
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for (i = 0; i < pp->nverts; i++)
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for (j = 0; j < 3; j++)
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putint((long)pp->xyz[i][j], 4, fp);
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/* vertex normals */
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if (flags & MT_N)
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for (i = 0; i < pp->nverts; i++)
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putint((long)pp->norm[i], 4, fp);
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/* uv coordinates */
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if (flags & MT_UV)
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for (i = 0; i < pp->nverts; i++)
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for (j = 0; j < 2; j++)
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putint((long)pp->uv[i][j], 4, fp);
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/* local triangles */
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putint((long)pp->ntris, 2, fp);
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for (i = 0; i < pp->ntris; i++) {
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putint((long)pp->tri[i].v1, 1, fp);
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putint((long)pp->tri[i].v2, 1, fp);
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putint((long)pp->tri[i].v3, 1, fp);
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}
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/* joiner triangles */
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putint((long)pp->nj1tris, 2, fp);
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for (i = 0; i < pp->nj1tris; i++) {
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putint((long)pp->j1tri[i].v1j, 4, fp);
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putint((long)pp->j1tri[i].v2, 1, fp);
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putint((long)pp->j1tri[i].v3, 1, fp);
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}
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/* double joiner triangles */
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putint((long)pp->nj2tris, 2, fp);
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for (i = 0; i < pp->nj2tris; i++) {
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putint((long)pp->j2tri[i].v1j, 4, fp);
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putint((long)pp->j2tri[i].v2j, 4, fp);
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putint((long)pp->j2tri[i].v3, 1, fp);
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}
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}
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void
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writemesh(mp, fp) /* write mesh structures to fp */
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MESH *mp;
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FILE *fp;
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{
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char sbuf[64];
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int i;
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/* check that we have everything */
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if ((mp->ldflags & (IO_SCENE|IO_TREE|IO_BOUNDS)) !=
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(IO_SCENE|IO_TREE|IO_BOUNDS))
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error(INTERNAL, "missing data in writemesh");
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/* write format number */
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putint((long)(MESHMAGIC+sizeof(OBJECT)), 2, fp);
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/* write boundaries */
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for (i = 0; i < 3; i++) {
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sprintf(sbuf, "%.12g", mp->mcube.cuorg[i]);
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putstr(sbuf, fp);
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}
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sprintf(sbuf, "%.12g", mp->mcube.cusize);
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putstr(sbuf, fp);
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for (i = 0; i < 2; i++) {
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putflt(mp->uvlim[0][i], fp);
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putflt(mp->uvlim[1][i], fp);
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}
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/* write the octree */
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puttree(mp->mcube.cutree, fp);
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/* write the patches */
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putint((long)mp->npatches, 4, fp);
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for (i = 0; i < mp->npatches; i++)
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putpatch(&mp->patch[i], fp);
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if (ferror(fp))
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error(SYSTEM, "write error in writemesh");
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}
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