From bd09297b8ec465a52f294092998812745ec6c566 Mon Sep 17 00:00:00 2001
From: "Brad Payne (Vir Linden)" <vir@lindenlab.com>
Date: Fri, 3 Jun 2016 08:08:41 -0400
Subject: SL-220 - handle case that a weighted vertex includes no skin weights

---
 indra/llmath/llvolume.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

(limited to 'indra/llmath')

diff --git a/indra/llmath/llvolume.cpp b/indra/llmath/llvolume.cpp
index 2918e2e272..ac6f77b5ab 100644
--- a/indra/llmath/llvolume.cpp
+++ b/indra/llmath/llvolume.cpp
@@ -2563,11 +2563,13 @@ bool LLVolume::unpackVolumeFaces(std::istream& is, S32 size)
                     {
                         wght = LLVector4(0.999f,0.f,0.f,0.f);
                     }
-                    for (U32 k=0; k<cur_influence; k++)
+                    for (U32 k=0; k<4; k++)
                     {
                         F32 f_combined = (F32) joints[k] + wght[k];
-                        llassert(f_combined-(S32)f_combined>0); // If this fails, we have a floating point precision error.
                         joints_with_weights[k] = f_combined;
+                        // Any weights we added above should wind up non-zero and applied to a specific bone.
+                        // A failure here would indicate a floating point precision error in the math.
+                        llassert((k >= cur_influence) || (f_combined - S32(f_combined) > 0.0f));
                     }
 					face.mWeights[cur_vertex].loadua(joints_with_weights.mV);
 
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