public void ComputeShadowMesh(Vector3 lightWorldPosition)
{
List <VertexBuffer> vertexBuffers;
List <IndexBuffer> indexBuffers;
_gameWorld.GetRenderables(out vertexBuffers, out indexBuffers);
for (int i = 0; i < vertexBuffers.Count; ++i)
{
_shadowMeshIndices.Clear();
_shadowVertices.Clear();
_shadowIndices.Clear();
VertexPositionNormalTexture[] vertexData = new VertexPositionNormalTexture[vertexBuffers[i].VertexCount];
vertexBuffers[i].GetData <VertexPositionNormalTexture>(vertexData);
UInt32[] vertexIndices = new UInt32[indexBuffers[i].IndexCount];
indexBuffers[i].GetData <UInt32>(vertexIndices);
foreach (VertexPositionNormalTexture vertex in vertexData)
{
_shadowVertices.Add(vertex.Position);
}
foreach (UInt32 index in vertexIndices)
{
_shadowIndices.Add(index);
}
Shadows.CreateShadowVolumeMesh(vertexData.ToList(), _shadowIndices, Vector3.Zero - lightWorldPosition, ref _shadowMeshIndices, ref _shadowMeshVertices);
IndexBuffer shadowIndexBuffer = new IndexBuffer(GraphicsDevice, IndexElementSize.ThirtyTwoBits, _shadowMeshIndices.Count, BufferUsage.None);
shadowIndexBuffer.SetData(_shadowMeshIndices.ToArray());
_shadowIndexList.Add(shadowIndexBuffer);
List <VertexPositionColor> shadowVertices = new List <VertexPositionColor>();
foreach (Vector3 vertexPos in _shadowMeshVertices)
{
shadowVertices.Add(new VertexPositionColor(vertexPos, Color.White));
}
VertexBuffer shadowVertexBuffer = new VertexBuffer(GraphicsDevice, typeof(VertexPositionColor), shadowVertices.Count, BufferUsage.None);
shadowVertexBuffer.SetData(shadowVertices.ToArray());
_shadowVertexBufferList.Add(shadowVertexBuffer);
}
}