public static Model FromScene(Scene scene, Device device)
{
VertexDeclaration vertexDeclaration = new VertexDeclaration(device,
VertexPositionNormalTexture.VertexElements);
Model result = new Model(scene, device, vertexDeclaration);
foreach (Mesh mesh in scene.Meshes)
{
VertexBuffer vertexBuffer = new VertexBuffer(device,
mesh.Positions.Count * VertexPositionNormalTexture.SizeInBytes,
Usage.WriteOnly, VertexFormat.None, Pool.Default);
DataStream vertexDataStream = vertexBuffer.Lock(0,
mesh.Positions.Count * VertexPositionNormalTexture.SizeInBytes,
LockFlags.None);
VertexPositionNormalTexture[] vertices = new VertexPositionNormalTexture[mesh.Positions.Count];
for (int i = 0; i < vertices.Length; ++i)
vertices[i] = new VertexPositionNormalTexture(mesh.Positions[i], (mesh.Normals.Count > i) ? mesh.Normals[i] : Vector3D.Zero, Point2D.Zero);
vertexDataStream.WriteRange(vertices);
vertexBuffer.Unlock();
IndexBuffer indexBuffer = new IndexBuffer(device, mesh.Indices.Count * sizeof(int),
Usage.WriteOnly, Pool.Default, false);
DataStream indexDataStream = indexBuffer.Lock(0, mesh.Indices.Count * sizeof(int), LockFlags.None);
indexDataStream.WriteRange(mesh.Indices.ToArray());
indexBuffer.Unlock();
ModelMesh modelMesh = new ModelMesh(mesh, device, vertexBuffer,
mesh.Positions.Count, indexBuffer, mesh.PrimitiveCount,
Matrix3D.Identity, mesh.Material);
result.Meshes.Add(modelMesh);
}
return result;
}
private Model GetModel()
{
if (_model == null)
{
ModelEditorViewModel vm = (ModelEditorViewModel) DataContext;
_model = ModelConverter.FromScene(vm.Scene.Scene, _graphicsDeviceService.Device);
}
return _model;
}
public Renderer(Device device, Model model, int width, int height, Transform3D cameraTransform)
{
_device = device;
_model = model;
_cameraTransform = cameraTransform;
const float fov = MathUtility.PI_OVER_4;
AxisAlignedBox3D bounds = _model.SourceScene.Bounds;
Vector3D max = bounds.Size;
float radius = System.Math.Max(max.X, System.Math.Max(max.Y, max.Z));
_projection = Matrix3D.CreatePerspectiveFieldOfView(
fov,
width / (float) height,
1.0f, radius * 10);
float dist = radius / MathUtility.Sin(fov / 2);
_view = Matrix3D.CreateLookAt(
bounds.Center + Vector3D.Backward * dist,
Vector3D.Forward,
Vector3D.Up);
}
