| 6 |
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*/ |
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#ifndef _RAD_MESH_H_ |
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#define _RAD_MESH_H_ |
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+ |
|
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+ |
#include "lookup.h" |
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+ |
|
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#ifdef __cplusplus |
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extern "C" { |
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#endif |
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|
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– |
#include "copyright.h" |
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– |
|
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– |
#include "lookup.h" |
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|
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#ifndef BYTE |
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#define BYTE unsigned char |
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#endif |
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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 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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> |
* For triangle ID's, the top 22 bits (10-31) indicate the parent patch, |
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> |
* and the 10th bit (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 8th bit indicates whether the triangle joins |
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> |
* If it's a joiner, then the 9th 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 |
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< |
* limitation. |
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> |
* limitation. (This representation is so efficient, that the octree |
| 47 |
> |
* structure ends up dominating memory for most compiled meshes.) |
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*/ |
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|
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/* A triangle mesh patch */ |
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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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< |
short ntris; /* triangle count */ |
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> |
short ntris; /* local triangle count */ |
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short nj1tris; /* joiner triangle count */ |
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short nj2tris; /* double joiner triangle count */ |
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} MESHPATCH; |
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RREAL 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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> |
MESHPATCH *patch; /* allocated mesh patch array */ |
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int npatches; /* number of mesh patches */ |
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OBJREC *pseudo; /* mesh pseudo objects */ |
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LUTAB lut; /* vertex lookup table */ |
| 137 |
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} |
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#endif |
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#endif /* _RAD_MESH_H_ */ |
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– |
|
