public static SceneGraph PickClosestObject(SceneGraph root, Camera Camera, Matrix ProjMatrix, Vector2 ClickPoint, Vector2 ScreenDims)
{
// Convert screen pixel to view space
Vector2 viewSpacePixel = new Vector2((2.0f * ClickPoint.X / ScreenDims.X - 1.0f) / ProjMatrix.M11, (-2.0f * ClickPoint.Y / ScreenDims.Y + 1.0f) / ProjMatrix.M22);
Ray viewRay = new Ray(new Vector3(), new Vector3(viewSpacePixel.X, viewSpacePixel.Y, 1.0f));
// View Ray is now the thing we will use...
Matrix toWorld = Matrix.Invert(Camera.GetViewMatrix());
viewRay.Direction = Vector3.TransformNormal(viewRay.Direction, toWorld);
viewRay.Position = Vector3.TransformCoordinate(viewRay.Position, toWorld);
return pickClosestObject(root, Camera.GetViewMatrix(), viewRay);
}
private void RenderNode(SceneGraph Node, Camera Camera, SlimDX.Matrix ProjMatrix, int indexOffset, int vertexOffset, out int indicesConsumed, out int verticesConsumed)
{
var ic = indexOffset;
var vc = vertexOffset;
if (Node.Renderable != null)
{
WorldViewProj = Node.WorldTransform * Camera.GetViewMatrix() * ProjMatrix;
CPO_WorldViewProj.SetMatrix(WorldViewProj);
int nIndices = Node.Renderable.GetIndexList(EffectName()).Length;
int nVerts = Node.Renderable.GetVertexList(EffectName()).Length;
// TODO KAM: This is horribly inefficient, change this!
ImmediateContext.DrawIndexed(nIndices, indexOffset, vertexOffset);
ic += nIndices;
vc += nVerts;
}
foreach (var Child in Node.Children)
{
int cic, cvc;
RenderNode(Child.Value, Camera, ProjMatrix, indexOffset + ic, vertexOffset + vc, out cic, out cvc);
ic += cic;
vc += cvc;
}
indicesConsumed = ic;
verticesConsumed = vc;
}