public void Generate(IServiceRegistry services, Model model)
{
if (services == null) throw new ArgumentNullException("services");
if (model == null) throw new ArgumentNullException("model");
var graphicsDevice = services.GetSafeServiceAs<IGraphicsDeviceService>().GraphicsDevice;
var data = this.CreatePrimitiveMeshData();
if (data.Vertices.Length == 0)
{
throw new InvalidOperationException("Invalid GeometricPrimitive [{0}]. Expecting non-zero Vertices array");
}
var boundingBox = BoundingBox.Empty;
for (int i = 0; i < data.Vertices.Length; i++)
BoundingBox.Merge(ref boundingBox, ref data.Vertices[i].Position, out boundingBox);
BoundingSphere boundingSphere;
unsafe
{
fixed (void* verticesPtr = data.Vertices)
BoundingSphere.FromPoints((IntPtr)verticesPtr, 0, data.Vertices.Length, VertexPositionNormalTexture.Size, out boundingSphere);
}
var originalLayout = data.Vertices[0].GetLayout();
// Generate Tangent/BiNormal vectors
var resultWithTangentBiNormal = VertexHelper.GenerateTangentBinormal(originalLayout, data.Vertices, data.Indices);
// Generate Multitexcoords
var result = VertexHelper.GenerateMultiTextureCoordinates(resultWithTangentBiNormal);
var meshDraw = new MeshDraw();
var layout = result.Layout;
var vertexBuffer = result.VertexBuffer;
var indices = data.Indices;
if (indices.Length < 0xFFFF)
{
var indicesShort = new ushort[indices.Length];
for (int i = 0; i < indicesShort.Length; i++)
{
indicesShort[i] = (ushort)indices[i];
}
meshDraw.IndexBuffer = new IndexBufferBinding(Buffer.Index.New(graphicsDevice, indicesShort).RecreateWith(indicesShort), false, indices.Length);
}
else
{
if (graphicsDevice.Features.Profile <= GraphicsProfile.Level_9_3)
{
throw new InvalidOperationException("Cannot generate more than 65535 indices on feature level HW <= 9.3");
}
meshDraw.IndexBuffer = new IndexBufferBinding(Buffer.Index.New(graphicsDevice, indices).RecreateWith(indices), true, indices.Length);
}
meshDraw.VertexBuffers = new[] { new VertexBufferBinding(Buffer.New(graphicsDevice, vertexBuffer, BufferFlags.VertexBuffer).RecreateWith(vertexBuffer), layout, data.Vertices.Length) };
meshDraw.DrawCount = indices.Length;
meshDraw.PrimitiveType = PrimitiveType.TriangleList;
var mesh = new Mesh { Draw = meshDraw, BoundingBox = boundingBox, BoundingSphere = boundingSphere };
model.BoundingBox = boundingBox;
model.BoundingSphere = boundingSphere;
model.Add(mesh);
if (MaterialInstance != null && MaterialInstance.Material != null)
{
model.Materials.Add(MaterialInstance);
}
}
