public void Render(ICamera camera, ICamera lodCamera, Vector3d lightPosition)
{
var transformation = new Matrix4d(
new Vector4d(1, 0, 0, 0),
new Vector4d(0, 0, 1, 0),
new Vector4d(0, 1, 0, 1),
new Vector4d(0, 0, 0, 1));
var visibleChunks = _chunkedLod.Calculate(
_tree,
lodCamera.Width,
lodCamera.HorizontalFieldOfView,
Vector3d.Transform(lodCamera.Position, transformation),
30,
FrustumPlaneExtractor.ExtractRowMajor(transformation * lodCamera.ComputeCameraMatrix() * lodCamera.ComputeProjectionMatrix()));
GL.ClearColor(Color4.White);
GL.Clear(ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit);
GL.Enable(EnableCap.DepthTest);
GL.CullFace(CullFaceMode.Back);
GL.Enable(EnableCap.CullFace);
GL.FrontFace(FrontFaceDirection.Cw);
_simpleMaterial.Bind();
_simpleMaterial.ProjectionMatrix.Set(camera.ComputeProjectionMatrix().ToMatrix4());
_simpleMaterial.ViewMatrix.Set(camera.ComputeCameraMatrix().ToMatrix4());
_simpleMaterial.LightDirection.Set(new Vector3(1, 1, 0).Normalized());
_simpleMaterial.Color.Set(new Vector4(0.9f, 0.9f, 0.9f, 1.0f));
foreach (var chunkedLodTreeNode in visibleChunks)
{
var renderableMesh = _cache.GetRenderable(chunkedLodTreeNode.Bounds);
if (renderableMesh == null)
{
continue;
}
renderableMesh.CreateVAO();
renderableMesh.VertexArrayObject.Bind();
var bounds = chunkedLodTreeNode.Bounds;
var translation = Matrix4.CreateTranslation((float)bounds.Center.X, 0, (float)bounds.Center.Y);
var delta = bounds.Max - bounds.Min;
var scale = Matrix4.CreateScale((float)delta.X, 1, (float)delta.Y);
var modelMatrix = scale * translation;
_simpleMaterial.ModelMatrix.Set(modelMatrix);
_simpleMaterial.NormalToWorld3x3.Set(Matrix3.Identity);
_simpleMaterial.LightPosition.Set((Vector3)lightPosition);
GL.DrawElements(BeginMode.Triangles, renderableMesh.Faces * 3, DrawElementsType.UnsignedInt, 0);
renderableMesh.VertexArrayObject.Unbind();
}
_simpleMaterial.Unbind();
}
public void Update(double elapsedTime, EntityManager entityManager)
{
if (_root == null)
{
_root = CreateNode(new Box3D(new Vector3d(-100, 0, -100f), new Vector3d(100f, 0, 100f)), 6, entityManager);
}
_frustumPlanes = FrustumPlaneExtractor.ExtractRowMajor(_camera);
var k = _camera.Width / (Math.Tan(_camera.HorizontalFieldOfView / 2));
ComputeLod(_root, k, entityManager);
}
