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#ifndef lint |
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static const char RCSid[] = "$Id: writemesh.c,v 2.5 2004/03/27 12:41:45 schorsch Exp $"; |
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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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|
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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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|
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#ifdef putc_unlocked /* avoid horrendous overhead of flockfile */ |
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#define putc putc_unlocked |
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#endif |
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|
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static void putfullnode(OCTREE fn, FILE *fp); |
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static void puttree(OCTREE ot, FILE *fp); |
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static void putpatch(MESHPATCH *pp, FILE *fp); |
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|
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|
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static void |
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putfullnode( /* 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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{ |
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OBJECT oset[MAXSET+1]; |
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register int i; |
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|
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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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|
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|
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static void |
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puttree( /* 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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{ |
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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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|
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|
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static void |
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putpatch( /* 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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{ |
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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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/* local triangle material(s) */ |
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if (pp->trimat == NULL) { |
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putint(1L, 2, fp); |
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putint((long)pp->solemat, 2, fp); |
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} else { |
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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->trimat[i], 2, 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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putint((long)pp->j1tri[i].mat, 2, 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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putint((long)pp->j2tri[i].mat, 2, fp); |
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} |
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} |
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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 *err; |
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char sbuf[64]; |
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int i; |
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/* do 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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/* validate mesh data */ |
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if ((err = checkmesh(mp)) != NULL) |
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error(USER, err); |
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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 materials */ |
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writescene(mp->mat0, mp->nmats, 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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} |
