diff options
| -rw-r--r-- | indra/llmath/llvolume.h | 16 | ||||
| -rw-r--r-- | indra/llprimitive/lldaeloader.cpp | 7 |
2 files changed, 17 insertions, 6 deletions
diff --git a/indra/llmath/llvolume.h b/indra/llmath/llvolume.h index a77e8c08c6..c0b224b1ff 100644 --- a/indra/llmath/llvolume.h +++ b/indra/llmath/llvolume.h @@ -936,17 +936,23 @@ public: LLVector4a* mCenter; LLVector2 mTexCoordExtents[2]; //minimum and maximum of texture coordinates of the face. - S32 mNumVertices; + S32 mNumVertices; // num vertices == num normals == num texcoords S32 mNumAllocatedVertices; S32 mNumIndices; - LLVector4a* mPositions; - LLVector4a* mNormals; + LLVector4a* mPositions; // Contains vertices, nortmals and texcoords + LLVector4a* mNormals; // pointer into mPositions LLVector4a* mTangents; - LLVector2* mTexCoords; + LLVector2* mTexCoords; // pointer into mPositions + + // mIndices contains mNumIndices amount of elements. + // It contains triangles, each 3 indices describe one triangle. + // If mIndices contains {0, 2, 3, 1, 2, 4}, it means there + // are two triangles {0, 2, 3} and {1, 2, 4} with values being + // indexes for mPositions/mNormals/mTexCoords U16* mIndices; - //vertex buffer filled in by LLFace to cache this volume face geometry in vram + // vertex buffer filled in by LLFace to cache this volume face geometry in vram // (declared as a LLPointer to LLRefCount to avoid dependency on LLVertexBuffer) mutable LLPointer<LLRefCount> mVertexBuffer; diff --git a/indra/llprimitive/lldaeloader.cpp b/indra/llprimitive/lldaeloader.cpp index dfa29fb539..d3acd44f06 100644 --- a/indra/llprimitive/lldaeloader.cpp +++ b/indra/llprimitive/lldaeloader.cpp @@ -787,7 +787,12 @@ LLModel::EModelStatus load_face_from_dom_polygons(std::vector<LLVolumeFace>& fac for (U32 i = 0; i < verts.size(); ++i) { indices[i] = vert_idx[verts[i]]; - llassert(!i || (indices[i-1] != indices[i])); + if (i % 3 != 0) // assumes GL_TRIANGLES, compare 0-1, 1-2, 3-4, 4-5 but not 2-3 or 5-6 + { + // A faulty degenerate triangle detection (triangle with 0 area), + // probably should be a warning and not an assert + llassert(!i || (indices[i-1] != indices[i])); + } } // DEBUG just build an expanded triangle list |