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#include "copyright.h" |
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#include "lookup.h" |
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|
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#ifndef uint4 |
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#define uint4 unsigned int4 |
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#endif |
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* never generates 0, so we can use this for unspecified normals. |
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* |
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* Vertex ID's are encoded using the bottom 8 bits of a 4-byte integer |
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* to index a vertex in a patch indicated by the 20 bits above (9-29). |
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* For triangle ID's, the top 10 bits (11-31) indicate the patch, and |
33 |
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* the 10th bit indicates whether the triangle joins patches. |
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* to index a vertex in a patch indicated by the 22 bits above (8-29). |
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* For triangle ID's, the top 22 bits (10-31) indicate the patch, and |
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* the bit 9 (0x200) indicates whether the triangle joins patches. |
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* If not, then the bottom 9 bits index into the local PTri array. |
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* If it's a joiner, then the 9th bit indicates whether the triangle joins |
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* If it's a joiner, then the 8th bit indicates whether the triangle joins |
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* two patches, in which case the bottom 8 bits index the PJoin2 array. |
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* Otherwise, the bottom 8 bits index the PJoin1 array. |
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* |
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* a lot of effort, but it can reduce mesh storage by a factor of 3 |
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* or more. This is important, as the whole point is to model very |
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* complicated geometry with this structure, and memory is the main |
45 |
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* limitation. (We also optimize intersection tests for triangles.) |
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* limitation. |
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*/ |
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/* A triangle mesh patch */ |
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struct PTri { |
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BYTE v1, v2, v3; /* local vertices */ |
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} *tri; /* local triangles */ |
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short solemat; /* sole material */ |
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int2 *trimat; /* or local material indices */ |
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struct PJoin1 { |
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int4 v1j; /* non-local vertex */ |
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+ |
int2 mat; /* material index */ |
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BYTE v2, v3; /* local vertices */ |
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} *j1tri; /* joiner triangles */ |
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struct PJoin2 { |
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int4 v1j, v2j; /* non-local vertices */ |
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int2 mat; /* material index */ |
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BYTE v3; /* local vertex */ |
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} *j2tri; /* double joiner triangles */ |
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short nverts; /* vertex count */ |
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int ldflags; /* what we've loaded */ |
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CUBE mcube; /* bounds and octree */ |
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FLOAT uvlim[2][2]; /* local coordinate extrema */ |
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OBJECT mat0; /* base material index */ |
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OBJECT nmats; /* number of materials */ |
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MESHPATCH *patch; /* mesh patch list */ |
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int npatches; /* number of mesh patches */ |
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char *cdata; /* opaque client data pointer */ |
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> |
OBJREC *pseudo; /* mesh pseudo objects */ |
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> |
LUTAB lut; /* vertex lookup table */ |
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struct mesh *next; /* next mesh in list */ |
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} MESH; |
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|
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/* mesh format identifier */ |
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#define MESHFMT "Radiance_tmesh" |
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/* magic number for mesh files */ |
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< |
#define MESHMAGIC ( 0 *MAXOBJSIZ+311) /* increment first value */ |
113 |
> |
#define MESHMAGIC ( 1 *MAXOBJSIZ+311) /* increment first value */ |
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|
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#ifdef NOPROTO |
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extern int getmeshtrivid(); |
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extern int getmeshvert(); |
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extern int getmeshtri(); |
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+ |
extern OBJREC *getmeshpseudo(); |
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extern int4 addmeshvert(); |
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extern OBJECT addmeshtri(); |
125 |
+ |
extern char *checkmesh(); |
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extern void printmeshstats(); |
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extern void freemesh(); |
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extern void freemeshinst(); |
133 |
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|
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extern MESH *getmesh(char *mname, int flags); |
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extern MESHINST *getmeshinst(OBJREC *o, int flags); |
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extern int getmeshtrivid(int4 tvid[3], MESH *mp, OBJECT ti); |
136 |
> |
extern int getmeshtrivid(int4 tvid[3], OBJECT *mo, |
137 |
> |
MESH *mp, OBJECT ti); |
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extern int getmeshvert(MESHVERT *vp, MESH *mp, int4 vid, int what); |
139 |
< |
extern int getmeshtri(MESHVERT tv[3], MESH *mp, OBJECT ti, int what); |
139 |
> |
extern int getmeshtri(MESHVERT tv[3], OBJECT *mo, |
140 |
> |
MESH *mp, OBJECT ti, int what); |
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> |
extern OBJREC *getmeshpseudo(MESH *mp, OBJECT mo); |
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extern int4 addmeshvert(MESH *mp, MESHVERT *vp); |
143 |
< |
extern OBJECT addmeshtri(MESH *mp, MESHVERT tv[3]); |
143 |
> |
extern OBJECT addmeshtri(MESH *mp, MESHVERT tv[3], OBJECT mo); |
144 |
> |
extern char *checkmesh(MESH *mp); |
145 |
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extern void printmeshstats(MESH *ms, FILE *fp); |
146 |
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extern void freemesh(MESH *ms); |
147 |
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extern void freemeshinst(OBJREC *o); |