private void CreateIndexBuffer(int triangleCount)
{
int indexSize = sizeof(int);
if (m_indexBuffer == null || m_indexBuffer.Description.Size < triangleCount * 3 * indexSize)
{
if (m_indexBuffer != null)
{
m_indexBuffer.Dispose();
}
m_indexBuffer = new IndexBuffer(MyRender.GraphicsDevice, triangleCount * 3 * indexSize, Usage.WriteOnly, Pool.Default, false);
}
int indexOffset = 0;
m_meshes.Clear();
foreach (var pair in m_materialGroups)
{
var mesh = new MyRenderGroup()
{
IndexStart = indexOffset, Material = pair.Key
};
foreach (var meshInfo in pair.Value)
{
// Copy indices
var compoundIb = m_indexBuffer.Lock(indexOffset * indexSize, meshInfo.Mesh.TriCount * 3 * indexSize, LockFlags.None);
var format = meshInfo.Model.IndexBuffer.Description.Format;
Debug.Assert(format == Format.Index16 || format == Format.Index32);
int modelIndexSize = format == Format.Index16 ? sizeof(short) : sizeof(int);
var modelIb = meshInfo.Model.IndexBuffer.Lock(meshInfo.Mesh.IndexStart * modelIndexSize, meshInfo.Mesh.TriCount * 3 * modelIndexSize, LockFlags.ReadOnly);
while (modelIb.RemainingLength > 0)
{
if (format == Format.Index16)
{
int index = modelIb.Read <short>() + meshInfo.VertexOffset;
compoundIb.Write(index);
}
else
{
int index = modelIb.Read <int>() + meshInfo.VertexOffset;
compoundIb.Write(index);
}
}
m_indexBuffer.Unlock();
meshInfo.Model.IndexBuffer.Unlock();
mesh.TriangleCount += meshInfo.Mesh.TriCount;
indexOffset += meshInfo.Mesh.TriCount * 3;
}
m_meshes.Add(mesh);
}
}
private void CreateIndexBuffer(int triangleCount)
{
int indexSize = sizeof(int);
if (m_indexBuffer == null || m_indexBuffer.Description.Size < triangleCount * 3 * indexSize)
{
if (m_indexBuffer != null)
m_indexBuffer.Dispose();
m_indexBuffer = new IndexBuffer(MyRender.GraphicsDevice, triangleCount * 3 * indexSize, Usage.WriteOnly, Pool.Default, false);
}
int indexOffset = 0;
m_meshes.Clear();
foreach (var pair in m_materialGroups)
{
var mesh = new MyRenderGroup() { IndexStart = indexOffset, Material = pair.Key };
foreach (var meshInfo in pair.Value)
{
// Copy indices
var compoundIb = m_indexBuffer.Lock(indexOffset * indexSize, meshInfo.Mesh.TriCount * 3 * indexSize, LockFlags.None);
var format = meshInfo.Model.IndexBuffer.Description.Format;
Debug.Assert(format == Format.Index16 || format == Format.Index32);
int modelIndexSize = format == Format.Index16 ? sizeof(short) : sizeof(int);
var modelIb = meshInfo.Model.IndexBuffer.Lock(meshInfo.Mesh.IndexStart * modelIndexSize, meshInfo.Mesh.TriCount * 3 * modelIndexSize, LockFlags.ReadOnly);
while (modelIb.RemainingLength > 0)
{
if (format == Format.Index16)
{
int index = modelIb.Read<short>() + meshInfo.VertexOffset;
compoundIb.Write(index);
}
else
{
int index = modelIb.Read<int>() + meshInfo.VertexOffset;
compoundIb.Write(index);
}
}
m_indexBuffer.Unlock();
meshInfo.Model.IndexBuffer.Unlock();
mesh.TriangleCount += meshInfo.Mesh.TriCount;
indexOffset += meshInfo.Mesh.TriCount * 3;
}
m_meshes.Add(mesh);
}
}
