public void SortTrianglesByDepth()
{
Debug.Assert(spriteMeshData != null);
if (spriteMeshData.boneCount == 0)
{
return;
}
m_VertexOrderList.Clear();
m_WeightedTriangles.Clear();
for (var i = 0; i < spriteMeshData.vertexCount; i++)
{
var vertexOrder = 0f;
var boneWeight = spriteMeshData.GetWeight(i);
for (var j = 0; j < boneWeight.Count; ++j)
{
vertexOrder += spriteMeshData.GetBoneDepth(boneWeight[j].boneIndex) * boneWeight[j].weight;
}
m_VertexOrderList.Add(vertexOrder);
}
for (int i = 0; i < spriteMeshData.indices.Count; i += 3)
{
int p1 = spriteMeshData.indices[i];
int p2 = spriteMeshData.indices[i + 1];
int p3 = spriteMeshData.indices[i + 2];
float weight = (m_VertexOrderList[p1] + m_VertexOrderList[p2] + m_VertexOrderList[p3]) / 3f;
m_WeightedTriangles.Add(new WeightedTriangle()
{
p1 = p1, p2 = p2, p3 = p3, weight = weight
});
}
m_WeightedTriangles.Sort();
spriteMeshData.indices.Clear();
for (var i = 0; i < m_WeightedTriangles.Count; ++i)
{
var triangle = m_WeightedTriangles[i];
spriteMeshData.indices.Add(triangle.p1);
spriteMeshData.indices.Add(triangle.p2);
spriteMeshData.indices.Add(triangle.p3);
}
}
