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Diffstat (limited to 'indra/newview/llface.cpp')
| -rw-r--r-- | indra/newview/llface.cpp | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/indra/newview/llface.cpp b/indra/newview/llface.cpp index c1776705f9..4dd991ee60 100644 --- a/indra/newview/llface.cpp +++ b/indra/newview/llface.cpp @@ -488,6 +488,33 @@ U16 LLFace::getGeometry(LLStrider<LLVector3> &vertices, LLStrider<LLVector3> &no return mGeomIndex; } +LLVector3 LLFace::getAverageNormal() +{ + if (!mHasAverageNormal) + { + if (mVertexBuffer.notNull()) + { + if (mVertexBuffer->hasDataType(LLVertexBuffer::TYPE_NORMAL)) + { + LLStrider<LLVector3> normals; + mVertexBuffer->getNormalStrider(normals, mGeomIndex, mGeomCount); + LLVector3 normal_total; + + for (int i = 0; i < mVertexBuffer->getNumVerts(); i++) + { + normal_total += *normals.get(); + normals++; + } + + mAverageNormal = normal_total / mVertexBuffer->getNumVerts(); + mHasAverageNormal = true; + } + } + } + + return mAverageNormal; +} + void LLFace::updateCenterAgent() { if (mDrawablep->isActive()) |