Merge. Refresh from /lindenlab/viewer-cat prior to pushing.

1 files changed, 37 insertions, 0 deletions

diff --git a/indra/llprimitive/llmodel.cpp b/indra/llprimitive/llmodel.cpp
index ef6eb75a6b..e236f98fe6 100644..100755
--- a/indra/llprimitive/llmodel.cpp
+++ b/indra/llprimitive/llmodel.cpp
@@ -1122,6 +1122,43 @@ void LLModel::getNormalizedScaleTranslation(LLVector3& scale_out, LLVector3& tra
 	translation_out = mNormalizedTranslation;
 }
 
+LLVector3 LLModel::getTransformedCenter(const LLMatrix4& mat)
+{
+	LLVector3 ret;
+
+	if (!mVolumeFaces.empty())
+	{
+		LLMatrix4a m;
+		m.loadu(mat);
+
+		LLVector4a minv,maxv;
+
+		LLVector4a t;
+		m.affineTransform(mVolumeFaces[0].mPositions[0], t);
+		minv = maxv = t;
+
+		for (S32 i = 0; i < mVolumeFaces.size(); ++i)
+		{
+			LLVolumeFace& face = mVolumeFaces[i];
+
+			for (U32 j = 0; j < face.mNumVertices; ++j)
+			{
+				m.affineTransform(face.mPositions[j],t);
+				update_min_max(minv, maxv, t);
+			}
+		}
+
+		minv.add(maxv);
+		minv.mul(0.5f);
+
+		ret.set(minv.getF32ptr());
+	}
+
+	return ret;
+}
+
+
+
 void LLModel::setNumVolumeFaces(S32 count)
 {
 	mVolumeFaces.resize(count);