SL-15940 Remove ability to set zero triangle limit

Setting lod to zero triangles doesn't work and shouldn't work, so UI shouldn't allow setting less then one triangle per model as well.

1 files changed, 8 insertions, 2 deletions

diff --git a/indra/newview/llmodelpreview.cpp b/indra/newview/llmodelpreview.cpp
index bf661d39b2..b17aa960ce 100644
--- a/indra/newview/llmodelpreview.cpp
+++ b/indra/newview/llmodelpreview.cpp
@@ -194,6 +194,7 @@ LLModelPreview::LLModelPreview(S32 width, S32 height, LLFloater* fmp)
     mPreviewLOD = 0;
     mModelLoader = NULL;
     mMaxTriangleLimit = 0;
+    mMinTriangleLimit = 0;
     mDirty = false;
     mGenLOD = false;
     mLoading = false;
@@ -1508,6 +1509,7 @@ void LLModelPreview::genGlodLODs(S32 which_lod, U32 decimation, bool enforce_tri
     }
 
     mMaxTriangleLimit = base_triangle_count;
+    mMinTriangleLimit = mBaseModel.size();
 
     for (S32 lod = start; lod >= end; --lod)
     {
@@ -1541,7 +1543,7 @@ void LLModelPreview::genGlodLODs(S32 which_lod, U32 decimation, bool enforce_tri
         U32 actual_verts = 0;
         U32 submeshes = 0;
 
-        mRequestedTriangleCount[lod] = (S32)((F32)triangle_count / triangle_ratio);
+        mRequestedTriangleCount[lod] = llmax(mMinTriangleLimit, (S32)((F32)triangle_count / triangle_ratio));
         mRequestedErrorThreshold[lod] = lod_error_threshold;
 
         glodGroupParameteri(mGroup, GLOD_ADAPT_MODE, lod_mode);
@@ -2100,6 +2102,7 @@ void LLModelPreview::genMeshOptimizerLODs(S32 which_lod, S32 meshopt_mode, U32 d
     }
 
     mMaxTriangleLimit = base_triangle_count;
+    mMinTriangleLimit = mBaseModel.size();
 
     // TODO: Glod regenerates vertex buffer at this stage
     // check why, it might be needed to regenerate buffer as well
@@ -2133,7 +2136,7 @@ void LLModelPreview::genMeshOptimizerLODs(S32 which_lod, S32 meshopt_mode, U32 d
             }
         }
 
-        mRequestedTriangleCount[lod] = triangle_limit;
+        mRequestedTriangleCount[lod] = llmax(mMinTriangleLimit, (S32)triangle_limit);
         mRequestedErrorThreshold[lod] = lod_error_threshold;
         mRequestedLoDMode[lod] = lod_mode;
 
@@ -2431,6 +2434,7 @@ void LLModelPreview::updateStatusMessages()
     if (mMaxTriangleLimit == 0)
     {
         mMaxTriangleLimit = total_tris[LLModel::LOD_HIGH];
+        mMinTriangleLimit = mUploadData.size();
     }
 
     mHasDegenerate = false;
@@ -2933,6 +2937,7 @@ void LLModelPreview::updateLodControls(S32 lod)
         LLSpinCtrl* limit = mFMP->getChild<LLSpinCtrl>("lod_triangle_limit_" + lod_name[lod]);
 
         limit->setMaxValue(mMaxTriangleLimit);
+        limit->setMinValue(mMinTriangleLimit);
         limit->forceSetValue(mRequestedTriangleCount[lod]);
 
         threshold->forceSetValue(mRequestedErrorThreshold[lod]);
@@ -2945,6 +2950,7 @@ void LLModelPreview::updateLodControls(S32 lod)
             threshold->setVisible(false);
 
             limit->setMaxValue(mMaxTriangleLimit);
+            limit->setMinValue(mMinTriangleLimit);
             limit->setIncrement(llmax((U32)1, mMaxTriangleLimit / 32));
         }
         else