| 1 |
greg |
2.1 |
#ifndef lint |
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schorsch |
2.5 |
static const char RCSid[] = "$Id: readmesh.c,v 2.4 2003/06/07 12:50:20 schorsch Exp $"; |
| 3 |
greg |
2.1 |
#endif |
| 4 |
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/* |
| 5 |
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* Routines for reading a compiled mesh from a file |
| 6 |
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*/ |
| 7 |
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#include "standard.h" |
| 9 |
schorsch |
2.5 |
#include "platform.h" |
| 10 |
greg |
2.1 |
#include "octree.h" |
| 11 |
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#include "object.h" |
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#include "mesh.h" |
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schorsch |
2.4 |
#include "resolu.h" |
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greg |
2.1 |
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| 15 |
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static char *meshfn; /* input file name */ |
| 16 |
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static FILE *meshfp; /* mesh file pointer */ |
| 17 |
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static int objsize; /* sizeof(OBJECT) from writer */ |
| 18 |
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| 19 |
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| 20 |
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static void |
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mesherror(etyp, msg) /* mesh read error */ |
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int etyp; |
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char *msg; |
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{ |
| 25 |
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char msgbuf[128]; |
| 26 |
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| 27 |
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sprintf(msgbuf, "(%s): %s", meshfn, msg); |
| 28 |
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error(etyp, msgbuf); |
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} |
| 30 |
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| 31 |
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| 32 |
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static long |
| 33 |
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mgetint(siz) /* get a siz-byte integer */ |
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int siz; |
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{ |
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register long r; |
| 37 |
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| 38 |
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r = getint(siz, meshfp); |
| 39 |
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if (feof(meshfp)) |
| 40 |
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mesherror(USER, "truncated mesh file"); |
| 41 |
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return(r); |
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} |
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| 44 |
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| 45 |
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static double |
| 46 |
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mgetflt() /* get a floating point number */ |
| 47 |
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{ |
| 48 |
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double r; |
| 49 |
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| 50 |
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r = getflt(meshfp); |
| 51 |
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if (feof(meshfp)) |
| 52 |
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mesherror(USER, "truncated mesh file"); |
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return(r); |
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} |
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static OCTREE |
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getfullnode() /* get a set, return fullnode */ |
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{ |
| 60 |
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OBJECT set[MAXSET+1]; |
| 61 |
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register int i; |
| 62 |
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| 63 |
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if ((set[0] = mgetint(objsize)) > MAXSET) |
| 64 |
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mesherror(USER, "bad set in getfullnode"); |
| 65 |
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for (i = 1; i <= set[0]; i++) |
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set[i] = mgetint(objsize); |
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return(fullnode(set)); |
| 68 |
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} |
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| 71 |
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static OCTREE |
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gettree() /* get a pre-ordered octree */ |
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{ |
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register OCTREE ot; |
| 75 |
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register int i; |
| 76 |
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| 77 |
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switch (getc(meshfp)) { |
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schorsch |
2.4 |
case OT_EMPTY: |
| 79 |
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return(EMPTY); |
| 80 |
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case OT_FULL: |
| 81 |
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return(getfullnode()); |
| 82 |
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case OT_TREE: |
| 83 |
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if ((ot = octalloc()) == EMPTY) |
| 84 |
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mesherror(SYSTEM, "out of tree space in readmesh"); |
| 85 |
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for (i = 0; i < 8; i++) |
| 86 |
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octkid(ot, i) = gettree(); |
| 87 |
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return(ot); |
| 88 |
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case EOF: |
| 89 |
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mesherror(USER, "truncated mesh octree"); |
| 90 |
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default: |
| 91 |
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mesherror(USER, "damaged mesh octree"); |
| 92 |
greg |
2.1 |
} |
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schorsch |
2.4 |
return NULL; /* pro forma return */ |
| 94 |
greg |
2.1 |
} |
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| 96 |
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| 97 |
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static void |
| 98 |
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skiptree() /* skip octree on input */ |
| 99 |
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{ |
| 100 |
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register int i; |
| 101 |
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| 102 |
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switch (getc(meshfp)) { |
| 103 |
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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 = mgetint(objsize)*objsize; i-- > 0; ) |
| 107 |
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if (getc(meshfp) == EOF) |
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mesherror(USER, "truncated mesh 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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mesherror(USER, "truncated mesh octree"); |
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default: |
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mesherror(USER, "damaged mesh octree"); |
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} |
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} |
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| 121 |
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| 122 |
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static void |
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getpatch(pp) /* load a mesh patch */ |
| 124 |
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register MESHPATCH *pp; |
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{ |
| 126 |
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int flags; |
| 127 |
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int i, j; |
| 128 |
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/* vertex flags */ |
| 129 |
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flags = mgetint(1); |
| 130 |
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if (!(flags & MT_V) || flags & ~(MT_V|MT_N|MT_UV)) |
| 131 |
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mesherror(USER, "bad patch flags"); |
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/* allocate vertices */ |
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pp->nverts = mgetint(2); |
| 134 |
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if (pp->nverts <= 0 || pp->nverts > 256) |
| 135 |
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mesherror(USER, "bad number of patch vertices"); |
| 136 |
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pp->xyz = (uint4 (*)[3])malloc(pp->nverts*3*sizeof(uint4)); |
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if (pp->xyz == NULL) |
| 138 |
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goto nomem; |
| 139 |
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if (flags & MT_N) { |
| 140 |
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pp->norm = (int4 *)calloc(pp->nverts, sizeof(int4)); |
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if (pp->norm == NULL) |
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goto nomem; |
| 143 |
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} else |
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pp->norm = NULL; |
| 145 |
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if (flags & MT_UV) { |
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pp->uv = (uint4 (*)[2])calloc(pp->nverts, 2*sizeof(uint4)); |
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if (pp->uv == NULL) |
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goto nomem; |
| 149 |
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} else |
| 150 |
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pp->uv = NULL; |
| 151 |
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/* vertex xyz locations */ |
| 152 |
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for (i = 0; i < pp->nverts; i++) |
| 153 |
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for (j = 0; j < 3; j++) |
| 154 |
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pp->xyz[i][j] = mgetint(4); |
| 155 |
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/* vertex normals */ |
| 156 |
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if (flags & MT_N) |
| 157 |
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for (i = 0; i < pp->nverts; i++) |
| 158 |
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pp->norm[i] = mgetint(4); |
| 159 |
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/* uv coordinates */ |
| 160 |
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if (flags & MT_UV) |
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for (i = 0; i < pp->nverts; i++) |
| 162 |
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for (j = 0; j < 2; j++) |
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pp->uv[i][j] = mgetint(4); |
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/* local triangles */ |
| 165 |
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pp->ntris = mgetint(2); |
| 166 |
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if (pp->ntris < 0 || pp->ntris > 512) |
| 167 |
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mesherror(USER, "bad number of local triangles"); |
| 168 |
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if (pp->ntris) { |
| 169 |
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pp->tri = (struct PTri *)malloc(pp->ntris * |
| 170 |
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sizeof(struct PTri)); |
| 171 |
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if (pp->tri == NULL) |
| 172 |
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goto nomem; |
| 173 |
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for (i = 0; i < pp->ntris; i++) { |
| 174 |
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pp->tri[i].v1 = mgetint(1); |
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pp->tri[i].v2 = mgetint(1); |
| 176 |
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pp->tri[i].v3 = mgetint(1); |
| 177 |
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} |
| 178 |
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} else |
| 179 |
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pp->tri = NULL; |
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greg |
2.2 |
/* local triangle material(s) */ |
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if (mgetint(2) > 1) { |
| 182 |
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pp->trimat = (int2 *)malloc(pp->ntris*sizeof(int2)); |
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if (pp->trimat == NULL) |
| 184 |
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goto nomem; |
| 185 |
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for (i = 0; i < pp->ntris; i++) |
| 186 |
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pp->trimat[i] = mgetint(2); |
| 187 |
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} else { |
| 188 |
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pp->solemat = mgetint(2); |
| 189 |
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pp->trimat = NULL; |
| 190 |
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} |
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greg |
2.1 |
/* joiner triangles */ |
| 192 |
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pp->nj1tris = mgetint(2); |
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if (pp->nj1tris < 0 || pp->nj1tris > 512) |
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mesherror(USER, "bad number of joiner triangles"); |
| 195 |
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if (pp->nj1tris) { |
| 196 |
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pp->j1tri = (struct PJoin1 *)malloc(pp->nj1tris * |
| 197 |
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sizeof(struct PJoin1)); |
| 198 |
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if (pp->j1tri == NULL) |
| 199 |
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goto nomem; |
| 200 |
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for (i = 0; i < pp->nj1tris; i++) { |
| 201 |
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pp->j1tri[i].v1j = mgetint(4); |
| 202 |
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pp->j1tri[i].v2 = mgetint(1); |
| 203 |
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pp->j1tri[i].v3 = mgetint(1); |
| 204 |
greg |
2.2 |
pp->j1tri[i].mat = mgetint(2); |
| 205 |
greg |
2.1 |
} |
| 206 |
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} else |
| 207 |
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pp->j1tri = NULL; |
| 208 |
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/* double joiner triangles */ |
| 209 |
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pp->nj2tris = mgetint(2); |
| 210 |
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if (pp->nj2tris < 0 || pp->nj2tris > 256) |
| 211 |
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mesherror(USER, "bad number of double joiner triangles"); |
| 212 |
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if (pp->nj2tris) { |
| 213 |
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pp->j2tri = (struct PJoin2 *)malloc(pp->nj2tris * |
| 214 |
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sizeof(struct PJoin2)); |
| 215 |
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if (pp->j2tri == NULL) |
| 216 |
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goto nomem; |
| 217 |
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for (i = 0; i < pp->nj2tris; i++) { |
| 218 |
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pp->j2tri[i].v1j = mgetint(4); |
| 219 |
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pp->j2tri[i].v2j = mgetint(4); |
| 220 |
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pp->j2tri[i].v3 = mgetint(1); |
| 221 |
greg |
2.2 |
pp->j2tri[i].mat = mgetint(2); |
| 222 |
greg |
2.1 |
} |
| 223 |
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} else |
| 224 |
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pp->j2tri = NULL; |
| 225 |
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return; |
| 226 |
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nomem: |
| 227 |
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error(SYSTEM, "out of mesh memory in getpatch"); |
| 228 |
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} |
| 229 |
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| 230 |
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| 231 |
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void |
| 232 |
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readmesh(mp, path, flags) /* read in mesh structures */ |
| 233 |
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MESH *mp; |
| 234 |
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char *path; |
| 235 |
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int flags; |
| 236 |
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{ |
| 237 |
greg |
2.2 |
char *err; |
| 238 |
greg |
2.1 |
char sbuf[64]; |
| 239 |
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int i; |
| 240 |
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/* check what's loaded */ |
| 241 |
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flags &= (IO_INFO|IO_BOUNDS|IO_TREE|IO_SCENE) & ~mp->ldflags; |
| 242 |
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/* open input file */ |
| 243 |
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if (path == NULL) { |
| 244 |
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meshfn = "standard input"; |
| 245 |
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meshfp = stdin; |
| 246 |
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} else if ((meshfp = fopen(meshfn=path, "r")) == NULL) { |
| 247 |
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sprintf(errmsg, "cannot open mesh file \"%s\"", path); |
| 248 |
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error(SYSTEM, errmsg); |
| 249 |
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} |
| 250 |
schorsch |
2.3 |
SET_FILE_BINARY(meshfp); |
| 251 |
greg |
2.1 |
/* read header */ |
| 252 |
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checkheader(meshfp, MESHFMT, flags&IO_INFO ? stdout : (FILE *)NULL); |
| 253 |
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/* read format number */ |
| 254 |
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objsize = getint(2, meshfp) - MESHMAGIC; |
| 255 |
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if (objsize <= 0 || objsize > MAXOBJSIZ || objsize > sizeof(long)) |
| 256 |
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mesherror(USER, "incompatible mesh format"); |
| 257 |
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/* read boundaries */ |
| 258 |
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if (flags & IO_BOUNDS) { |
| 259 |
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for (i = 0; i < 3; i++) |
| 260 |
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mp->mcube.cuorg[i] = atof(getstr(sbuf, meshfp)); |
| 261 |
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mp->mcube.cusize = atof(getstr(sbuf, meshfp)); |
| 262 |
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for (i = 0; i < 2; i++) { |
| 263 |
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mp->uvlim[0][i] = mgetflt(); |
| 264 |
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mp->uvlim[1][i] = mgetflt(); |
| 265 |
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} |
| 266 |
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} else { |
| 267 |
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for (i = 0; i < 4; i++) |
| 268 |
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getstr(sbuf, meshfp); |
| 269 |
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for (i = 0; i < 4; i++) |
| 270 |
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mgetflt(); |
| 271 |
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} |
| 272 |
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/* read the octree */ |
| 273 |
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if (flags & IO_TREE) |
| 274 |
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mp->mcube.cutree = gettree(); |
| 275 |
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else if (flags & IO_SCENE) |
| 276 |
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skiptree(); |
| 277 |
greg |
2.2 |
/* read materials and patches */ |
| 278 |
greg |
2.1 |
if (flags & IO_SCENE) { |
| 279 |
greg |
2.2 |
mp->mat0 = nobjects; |
| 280 |
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readscene(meshfp, objsize); |
| 281 |
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mp->nmats = nobjects - mp->mat0; |
| 282 |
greg |
2.1 |
mp->npatches = mgetint(4); |
| 283 |
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mp->patch = (MESHPATCH *)calloc(mp->npatches, |
| 284 |
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sizeof(MESHPATCH)); |
| 285 |
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if (mp->patch == NULL) |
| 286 |
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mesherror(SYSTEM, "out of patch memory"); |
| 287 |
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for (i = 0; i < mp->npatches; i++) |
| 288 |
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getpatch(&mp->patch[i]); |
| 289 |
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} |
| 290 |
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/* clean up */ |
| 291 |
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fclose(meshfp); |
| 292 |
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mp->ldflags |= flags; |
| 293 |
greg |
2.2 |
/* verify data */ |
| 294 |
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if ((err = checkmesh(mp)) != NULL) |
| 295 |
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mesherror(USER, err); |
| 296 |
greg |
2.1 |
} |
