private void UpdateCubeMapFacePassCBs()
{
for (int i = 0; i < 6; i++)
{
PassConstants cubeFacePassCB = _mainPassCB;
Matrix view = _cubeMapCameras[i].View;
Matrix proj = _cubeMapCameras[i].Proj;
Matrix viewProj = view * proj;
Matrix invView = Matrix.Invert(view);
Matrix invProj = Matrix.Invert(proj);
Matrix invViewProj = Matrix.Invert(viewProj);
cubeFacePassCB.View = Matrix.Transpose(view);
cubeFacePassCB.InvView = Matrix.Transpose(invView);
cubeFacePassCB.Proj = Matrix.Transpose(proj);
cubeFacePassCB.InvProj = Matrix.Transpose(invProj);
cubeFacePassCB.ViewProj = Matrix.Transpose(viewProj);
cubeFacePassCB.InvViewProj = Matrix.Transpose(invViewProj);
cubeFacePassCB.EyePosW = _cubeMapCameras[i].Position;
cubeFacePassCB.RenderTargetSize = new Vector2(_dynamicCubeMap.Width, _dynamicCubeMap.Height);
cubeFacePassCB.InvRenderTargetSize = new Vector2(1.0f / _dynamicCubeMap.Width, 1.0f / _dynamicCubeMap.Height);
UploadBuffer <PassConstants> currPassCB = CurrFrameResource.PassCB;
// Cube map pass cbuffers are stored in elements 1-6.
currPassCB.CopyData(1 + i, ref cubeFacePassCB);
}
}
private void UpdateReflectedPassCB()
{
_reflectedPassCB = _mainPassCB;
var mirrorPlane = new Plane(new Vector3(0, 0, 1), 0); // XY plane.
Matrix r = MathHelper.Reflection(mirrorPlane);
// Reflect the lighting.
for (int i = 0; i < 3; i++)
{
Vector3 lightDir = _mainPassCB.Lights[i].Direction;
Vector3 reflectedLightDir = Vector3.TransformNormal(lightDir, r);
Light reflectedLight = _reflectedPassCB.Lights[i];
reflectedLight.Direction = reflectedLightDir;
_reflectedPassCB.Lights[i] = reflectedLight;
}
// Reflected pass stored in index 1.
CurrFrameResource.PassCB.CopyData(1, ref _reflectedPassCB);
}