| 13 |
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extern "C" { |
| 14 |
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#endif |
| 15 |
|
|
| 16 |
< |
#ifndef BYTE |
| 17 |
< |
#define BYTE unsigned char |
| 16 |
> |
#ifndef uby8 |
| 17 |
> |
#define uby8 unsigned char |
| 18 |
|
#endif |
| 19 |
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|
| 20 |
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/* |
| 30 |
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* |
| 31 |
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* Vertex ID's are encoded using the bottom 8 bits of a 4-byte integer |
| 32 |
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* to index a vertex in a patch indicated by the 22 bits above (8-29). |
| 33 |
< |
* For triangle ID's, the top 22 bits (10-31) indicate the patch, and |
| 34 |
< |
* the bit 9 (0x200) indicates whether the triangle joins patches. |
| 33 |
> |
* For triangle ID's, the top 22 bits (10-31) indicate the parent patch, |
| 34 |
> |
* and the 10th bit (0x200) indicates whether the triangle joins patches. |
| 35 |
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* If not, then the bottom 9 bits index into the local PTri array. |
| 36 |
< |
* If it's a joiner, then the 8th bit indicates whether the triangle joins |
| 36 |
> |
* If it's a joiner, then the 9th bit indicates whether the triangle joins |
| 37 |
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* two patches, in which case the bottom 8 bits index the PJoin2 array. |
| 38 |
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* Otherwise, the bottom 8 bits index the PJoin1 array. |
| 39 |
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* |
| 43 |
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* a lot of effort, but it can reduce mesh storage by a factor of 3 |
| 44 |
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* or more. This is important, as the whole point is to model very |
| 45 |
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* complicated geometry with this structure, and memory is the main |
| 46 |
< |
* limitation. |
| 46 |
> |
* limitation. (This representation is so efficient, that the octree |
| 47 |
> |
* structure ends up dominating memory for most compiled meshes.) |
| 48 |
|
*/ |
| 49 |
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|
| 50 |
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/* A triangle mesh patch */ |
| 53 |
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int32 *norm; /* vertex normals */ |
| 54 |
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uint32 (*uv)[2]; /* vertex local coordinates */ |
| 55 |
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struct PTri { |
| 56 |
< |
BYTE v1, v2, v3; /* local vertices */ |
| 56 |
> |
uby8 v1, v2, v3; /* local vertices */ |
| 57 |
|
} *tri; /* local triangles */ |
| 58 |
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short solemat; /* sole material */ |
| 59 |
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int16 *trimat; /* or local material indices */ |
| 60 |
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struct PJoin1 { |
| 61 |
|
int32 v1j; /* non-local vertex */ |
| 62 |
|
int16 mat; /* material index */ |
| 63 |
< |
BYTE v2, v3; /* local vertices */ |
| 63 |
> |
uby8 v2, v3; /* local vertices */ |
| 64 |
|
} *j1tri; /* joiner triangles */ |
| 65 |
|
struct PJoin2 { |
| 66 |
|
int32 v1j, v2j; /* non-local vertices */ |
| 67 |
|
int16 mat; /* material index */ |
| 68 |
< |
BYTE v3; /* local vertex */ |
| 68 |
> |
uby8 v3; /* local vertex */ |
| 69 |
|
} *j2tri; /* double joiner triangles */ |
| 70 |
|
short nverts; /* vertex count */ |
| 71 |
< |
short ntris; /* triangle count */ |
| 71 |
> |
short ntris; /* local triangle count */ |
| 72 |
|
short nj1tris; /* joiner triangle count */ |
| 73 |
|
short nj2tris; /* double joiner triangle count */ |
| 74 |
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} MESHPATCH; |
| 82 |
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RREAL uvlim[2][2]; /* local coordinate extrema */ |
| 83 |
|
OBJECT mat0; /* base material index */ |
| 84 |
|
OBJECT nmats; /* number of materials */ |
| 85 |
< |
MESHPATCH *patch; /* mesh patch list */ |
| 85 |
> |
MESHPATCH *patch; /* allocated mesh patch array */ |
| 86 |
|
int npatches; /* number of mesh patches */ |
| 87 |
|
OBJREC *pseudo; /* mesh pseudo objects */ |
| 88 |
|
LUTAB lut; /* vertex lookup table */ |
| 137 |
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} |
| 138 |
|
#endif |
| 139 |
|
#endif /* _RAD_MESH_H_ */ |
| 139 |
– |
|
