fix some fuckups

Author: devshgraphicsprogramming

include/nbl/asset/IMeshPackerV2.h

@@ -302,7 +302,9 @@ uint32_t IMeshPackerV2<MeshBufferType, BufferType, MDIStructType>::calcMDIStruct
     uint32_t acc = 0u;
     for (auto mbIt = mbBegin; mbIt != mbEnd; mbIt++)
     {
-        const size_t idxCnt = (*mbIt)->getIndexCount();
+        auto mb = *mbIt;
+        assert(mb->getPipeline()->getPrimitiveAssemblyParams().primitiveType==EPT_TRIANGLE_LIST);
+        const size_t idxCnt = mb->getIndexCount();
         const uint32_t triCnt = idxCnt / 3;
         assert(idxCnt % 3 == 0);
 

include/nbl/asset/utils/IMeshPacker.h

@@ -125,7 +125,12 @@ class IMeshPacker : public IMeshPackerBase
         return size;
     }
 
-    inline constexpr uint32_t calcBatchCount(uint32_t triCnt) { return (triCnt + m_maxTriangleCountPerMDIData - 1) / m_maxTriangleCountPerMDIData; }
+    inline constexpr uint32_t calcBatchCount(uint32_t triCnt)
+    {
+        if (triCnt!=0u)
+            return (triCnt-1u)/m_minTriangleCountPerMDIData+1u;
+        return 0u;
+    }
 
     struct Triangle
     {