private static void AddVertexToBuffer(MySingleMaterialHelper materialHelper, ref MyVoxelVertex vertex0,
int matIndex, short vertexIndex0)
{
MyVoxelCacheCellRenderHelper.CreateArrayIfNotExist(matIndex);
if (MyVoxelCacheCellRenderHelper.SingleMaterialIndicesLookup[matIndex][vertexIndex0].CalcCounter !=
MyVoxelCacheCellRenderHelper.SingleMaterialIndicesLookupCount[matIndex])
{
int nextVertexIndex = materialHelper.VertexCount;
// Short overflow check
System.Diagnostics.Debug.Assert(nextVertexIndex <= short.MaxValue);
// copy position and ambient
materialHelper.Vertices[nextVertexIndex].Position = vertex0.Position;
materialHelper.Vertices[nextVertexIndex].Ambient = vertex0.Ambient;
// Copy normal
materialHelper.Vertices[nextVertexIndex].Normal = vertex0.Normal;
MyVoxelCacheCellRenderHelper.SingleMaterialIndicesLookup[matIndex][vertexIndex0].CalcCounter =
MyVoxelCacheCellRenderHelper.SingleMaterialIndicesLookupCount[matIndex];
MyVoxelCacheCellRenderHelper.SingleMaterialIndicesLookup[matIndex][vertexIndex0].VertexIndex =
(short)nextVertexIndex;
materialHelper.VertexCount++;
}
}
// This method adds triangles from one data cell into this render cell. Single-texture triangles are added using indices (so we use m_notCompressedIndex buffer).
// For this we need to find indices. We use lookup array for it.
// Now we support only 16-bit indices, so vertex buffer can't have more then short.MaxValue vertices.
public void AddTriangles(List <MyVoxelGeometry.CellData> cacheDataArray)
{
foreach (var cacheData in cacheDataArray)
{
// Increase lookup count, so we will think that all vertexes in helper arrays are new
for (int i = 0; i < MyVoxelCacheCellRenderHelper.SingleMaterialIndicesLookupCount.Length; i++)
{
MyVoxelCacheCellRenderHelper.SingleMaterialIndicesLookupCount[i]++;
}
for (int i = 0; i < cacheData.VoxelTrianglesCount; i++)
{
MyVoxelTriangle triangle = cacheData.VoxelTriangles[i];
MyVoxelVertex vertex0, vertex1, vertex2;
cacheData.GetUnpackedVertex(triangle.VertexIndex0, out vertex0);
cacheData.GetUnpackedVertex(triangle.VertexIndex1, out vertex1);
cacheData.GetUnpackedVertex(triangle.VertexIndex2, out vertex2);
vertex0.Position = (vertex0.Position - m_positionOffset) / m_positionScale;
vertex1.Position = (vertex1.Position - m_positionOffset) / m_positionScale;
vertex2.Position = (vertex2.Position - m_positionOffset) / m_positionScale;
Debug.Assert(vertex0.Position.IsInsideInclusive(ref Vector3.Zero, ref Vector3.One));
Debug.Assert(vertex1.Position.IsInsideInclusive(ref Vector3.Zero, ref Vector3.One));
Debug.Assert(vertex2.Position.IsInsideInclusive(ref Vector3.Zero, ref Vector3.One));
if ((vertex0.Material == vertex1.Material) && (vertex0.Material == vertex2.Material))
{
var matDef = MyDefinitionManager.Static.GetVoxelMaterialDefinition((byte)vertex0.Material);
// This is single-texture triangleVertexes, so we can choose material from any edge
MySingleMaterialHelper materialHelper = MyVoxelCacheCellRenderHelper.GetForMaterial(matDef);
// Add vertex0 to vertex buffer
AddVertexToBuffer(materialHelper, ref vertex0, matDef.Index, triangle.VertexIndex0);
// Add vertex1 to vertex buffer
AddVertexToBuffer(materialHelper, ref vertex1, matDef.Index, triangle.VertexIndex1);
// Add vertex2 to vertex buffer
AddVertexToBuffer(materialHelper, ref vertex2, matDef.Index, triangle.VertexIndex2);
MyVoxelCacheCellRenderHelper.CreateArrayIfNotExist(matDef.Index);
// Add indices
int nextTriangleIndex = materialHelper.IndexCount;
materialHelper.Indices[nextTriangleIndex + 0] = MyVoxelCacheCellRenderHelper.SingleMaterialIndicesLookup[matDef.Index][triangle.VertexIndex0].VertexIndex;
materialHelper.Indices[nextTriangleIndex + 1] = MyVoxelCacheCellRenderHelper.SingleMaterialIndicesLookup[matDef.Index][triangle.VertexIndex1].VertexIndex;
materialHelper.Indices[nextTriangleIndex + 2] = MyVoxelCacheCellRenderHelper.SingleMaterialIndicesLookup[matDef.Index][triangle.VertexIndex2].VertexIndex;
materialHelper.IndexCount += 3;
if ((materialHelper.VertexCount >= MyVoxelCacheCellRenderHelper.MAX_VERTICES_COUNT_STOP) ||
(materialHelper.IndexCount >= MyVoxelCacheCellRenderHelper.MAX_INDICES_COUNT_STOP))
{
// If this batch is almost full (or is full), we end it and start with new one
EndSingleMaterial(materialHelper);
}
}
else
{
int id = GetMultimaterialId(vertex0.Material, vertex1.Material, vertex2.Material);
// Assign current material
MyMultiMaterialHelper multiMaterialHelper = MyVoxelCacheCellRenderHelper.GetForMultimaterial(vertex0.Material, vertex1.Material, vertex2.Material);
// Copy packed normals
multiMaterialHelper.Vertices[multiMaterialHelper.VertexCount + 0].Normal = vertex0.Normal;
multiMaterialHelper.Vertices[multiMaterialHelper.VertexCount + 1].Normal = vertex0.Normal;
multiMaterialHelper.Vertices[multiMaterialHelper.VertexCount + 2].Normal = vertex0.Normal;
multiMaterialHelper.AddVertex(ref vertex0);
multiMaterialHelper.AddVertex(ref vertex1);
multiMaterialHelper.AddVertex(ref vertex2);
if (multiMaterialHelper.VertexCount >= MyVoxelCacheCellRenderHelper.MAX_VERTICES_COUNT_STOP)
{
EndMultiMaterial(multiMaterialHelper);
}
}
}
}
}