physics: fix VHACD Bepu hull crash from passing index count as triangle count

Author: xen2

sources/engine/Stride.Assets/BepuPhysics/HullAssetCompiler.cs

@@ -225,7 +225,7 @@ protected override Task<ResultStatus> DoCommandOverride(ICommandContext commandC
                     var decompositionDesc = new ConvexHullMesh.DecompositionDesc
                     {
                         VertexCount = (uint)combinedVerts.Count / 3,
-                        IndicesCount = (uint)combinedIndices.Count,
+                        TriangleCount = (uint)combinedIndices.Count / 3,
                         Vertexes = combinedVerts.ToArray(),
                         Indices = combinedIndices.ToArray(),
                         SimpleHull = !Parameters.Decomposition.Enabled,

sources/engine/Stride.Assets/Physics/ColliderShapeAssetCompiler.cs

@@ -289,7 +289,7 @@ from shape in Parameters.ColliderShapes
                         var decompositionDesc = new ConvexHullMesh.DecompositionDesc
                         {
                             VertexCount = (uint)combinedVerts.Count / 3,
-                            IndicesCount = (uint)combinedIndices.Count / 3,
+                            TriangleCount = (uint)combinedIndices.Count / 3,
                             Vertexes = combinedVerts.ToArray(),
                             Indices = combinedIndices.ToArray(),
                             SimpleHull = !convexHullDesc.Decomposition.Enabled,

sources/engine/Stride.Assets/Physics/VHACDSharp.cs

@@ -16,7 +16,7 @@ internal sealed class ConvexHullMesh : IDisposable
         public struct DecompositionDesc
         {
             public uint VertexCount;
-            public uint IndicesCount;
+            public uint TriangleCount;
             public float[] Vertexes;
             public uint[] Indices;
 
@@ -43,7 +43,7 @@ public void Generate(DecompositionDesc desc)
         {
             _internalCompound = vhacdGenerate(
                 desc.Vertexes, desc.VertexCount,
-                desc.Indices, desc.IndicesCount,
+                desc.Indices, desc.TriangleCount,
                 desc.SimpleHull,
                 desc.MaxConvexHulls,
                 desc.Resolution,