merge

1 files changed, 21 insertions, 0 deletions

diff --git a/indra/llrender/llvertexbuffer.cpp b/indra/llrender/llvertexbuffer.cpp
index d5b00f27a7..668e9e55f9 100644
--- a/indra/llrender/llvertexbuffer.cpp
+++ b/indra/llrender/llvertexbuffer.cpp
@@ -212,6 +212,27 @@ void LLVertexBuffer::setupClientArrays(U32 data_mask)
 			glClientActiveTextureARB(GL_TEXTURE0_ARB);
 		}
 	
+		if (sLastMask & MAP_WEIGHT4)
+		{
+			if (sWeight4Loc < 0)
+			{
+				llerrs << "Weighting disabled but vertex buffer still bound!" << llendl;
+			}
+
+			if (!(data_mask & MAP_WEIGHT4))
+			{ //disable 4-component skin weight			
+				glDisableVertexAttribArrayARB(sWeight4Loc);
+			}
+		}
+		else if (data_mask & MAP_WEIGHT4)
+		{
+			if (sWeight4Loc >= 0)
+			{ //enable 4-component skin weight
+				glEnableVertexAttribArrayARB(sWeight4Loc);
+			}
+		}
+				
+
 		sLastMask = data_mask;
 	}
 }