diff options
Diffstat (limited to 'source/blender/blenkernel/intern/mesh_evaluate.c')
| -rw-r--r-- | source/blender/blenkernel/intern/mesh_evaluate.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/source/blender/blenkernel/intern/mesh_evaluate.c b/source/blender/blenkernel/intern/mesh_evaluate.c index 74c5fb8114d..a334951c772 100644 --- a/source/blender/blenkernel/intern/mesh_evaluate.c +++ b/source/blender/blenkernel/intern/mesh_evaluate.c @@ -2243,6 +2243,7 @@ void BKE_mesh_loops_to_tessdata(CustomData *fdata, CustomData *ldata, CustomData const bool hasPCol = CustomData_has_layer(ldata, CD_PREVIEW_MLOOPCOL); const bool hasOrigSpace = CustomData_has_layer(ldata, CD_ORIGSPACE_MLOOP); const bool hasLoopNormal = CustomData_has_layer(ldata, CD_NORMAL); + const bool hasLoopTangent = CustomData_has_layer(ldata, CD_TANGENT); int findex, i, j; const int *pidx; unsigned int (*lidx)[4]; @@ -2307,6 +2308,51 @@ void BKE_mesh_loops_to_tessdata(CustomData *fdata, CustomData *ldata, CustomData } } } + + if (hasLoopTangent) { + /* need to do for all uv maps at some point */ + float (*ftangents)[4] = CustomData_get_layer(fdata, CD_TANGENT); + float (*ltangents)[4] = CustomData_get_layer(ldata, CD_TANGENT); + + for (findex = 0, pidx = polyindices, lidx = loopindices; + findex < num_faces; + pidx++, lidx++, findex++) + { + int nverts = (mface ? mface[findex].v4 : (*lidx)[3]) ? 4 : 3; + for (j = nverts; j--;) { + copy_v4_v4(ftangents[findex * 4 + j], ltangents[(*lidx)[j]]); + } + } + } +} + +void BKE_mesh_tangent_loops_to_tessdata(CustomData *fdata, CustomData *ldata, MFace *mface, + int *polyindices, unsigned int (*loopindices)[4], const int num_faces) +{ + /* Note: performances are sub-optimal when we get a NULL mface, we could be ~25% quicker with dedicated code... + * Issue is, unless having two different functions with nearly the same code, there's not much ways to solve + * this. Better imho to live with it for now. :/ --mont29 + */ + const bool hasLoopTangent = CustomData_has_layer(ldata, CD_TANGENT); + int findex, j; + const int *pidx; + unsigned int (*lidx)[4]; + + if (hasLoopTangent) { + /* need to do for all uv maps at some point */ + float (*ftangents)[4] = CustomData_get_layer(fdata, CD_TANGENT); + float (*ltangents)[4] = CustomData_get_layer(ldata, CD_TANGENT); + + for (findex = 0, pidx = polyindices, lidx = loopindices; + findex < num_faces; + pidx++, lidx++, findex++) + { + int nverts = (mface ? mface[findex].v4 : (*lidx)[3]) ? 4 : 3; + for (j = nverts; j--;) { + copy_v4_v4(ftangents[findex * 4 + j], ltangents[(*lidx)[j]]); + } + } + } } /** |