/// <summary>
/// Copy the specified geometric data to an index and a vertex buffer.
/// </summary>
/// <param name="data">Data to load inside the GPU.</param>
/// <param name="resource">Resource to return.</param>
/// <returns>The updated resource with the new vertex/index values.</returns>
private GeometryResource CopyToGPUBuffer(Shape.Descriptor data, GeometryResource resource)
{
int index = 0;
// - Loads all processed vertexs
foreach (PointDescriptor point in data.Points)
{
resource.Vertexs[index++] = new VertexData(new Vector3(point.Position), Color4.Black);
}
index = 0;
// - Loads all processed indexes
foreach (FaceDescriptor face in data.Faces)
{
HalfEdgeDescriptor firstEdge = data.Edges[face.FirstEdge];
HalfEdgeDescriptor edge = firstEdge;
do
{
resource.Indexes[index++] = (int)(edge.Start + resource.Vertexs.Offset / VertexData.SizeInBytes);
edge = data.Edges[edge.Next];
} while (edge.Start != face.FirstEdge);
}
return(resource);
}
/// <summary>
/// This method must implement the loading business in order to
/// provide a rendering cached structure.
/// </summary>
/// <param name="data">Metadata and data for the loading process.</param>
/// <returns>A result's descriptor.</returns>
protected override GeometryResource InternalLoad(Shape.Descriptor data)
{
GeometryResource resource = new GeometryResource
{
Vertexs = VertexManager.Alloc((uint)data.Points.Length),
Indexes = IndexManager.Alloc((uint)data.Edges.Length)
};
switch (data.TesselationType)
{
case Shape.TesselationType.Auto:
// - Manage automatic tessellation algorithm selection
case Shape.TesselationType.CPU1EarCut:
break;
case Shape.TesselationType.CPU1Delaunay:
break;
case Shape.TesselationType.GPU1EarCut:
break;
case Shape.TesselationType.GPU1Delaunay:
break;
}
return(CopyToGPUBuffer(data, resource));
}
