/// <summary>
/// Sets the screen spaced coordinates.
/// </summary>
/// <param name="context">The context.</param>
/// <param name="deviceContext">The device context.</param>
/// <param name="clearDepthBuffer">if set to <c>true</c> [clear depth buffer].</param>
protected virtual void SetScreenSpacedCoordinates(RenderContext context, DeviceContextProxy deviceContext, bool clearDepthBuffer)
{
context.WorldMatrix = Matrix.Identity;
DepthStencilView dsView;
if (clearDepthBuffer)
{
deviceContext.GetDepthStencilView(out dsView);
if (dsView == null)
{
return;
}
deviceContext.ClearDepthStencilView(dsView, DepthStencilClearFlags.Depth, 1f, 0);
dsView.Dispose();
}
IsRightHand = !context.Camera.CreateLeftHandSystem;
float viewportSize = Size * SizeScale;
var globalTrans = context.GlobalTransform;
UpdateProjectionMatrix((float)context.ActualWidth, (float)context.ActualHeight);
globalTrans.View = CreateViewMatrix(context, out globalTrans.EyePos);
globalTrans.Projection = projectionMatrix;
globalTrans.ViewProjection = globalTrans.View * globalTrans.Projection;
globalTrans.Viewport = new Vector4(viewportSize, viewportSize, 1f / viewportSize, 1f / viewportSize);
globalTransformCB.UploadDataToBuffer(deviceContext, ref globalTrans);
GlobalTransform = globalTrans;
int offX = (int)(Width / 2 * (1 + RelativeScreenLocationX) - viewportSize / 2);
int offY = (int)(Height / 2 * (1 - RelativeScreenLocationY) - viewportSize / 2);
deviceContext.SetViewport(offX, offY, viewportSize, viewportSize);
deviceContext.SetScissorRectangle(offX, offY, (int)viewportSize + offX, (int)viewportSize + offY);
}
