/// <summary>
/// Function to update the light data in the lighting shader.
/// </summary>
/// <param name="light">The light to retrieve data from.</param>
private void UpdateLight(Gorgon2DLight light)
{
var lightData = new PointLightData
{
Position = new DX.Vector4(new DX.Vector3(light.Position.X, light.Position.Y, -light.Position.Z), 1.0f),
Color = light.Color,
LightDirection = new DX.Vector4(new DX.Vector3(light.LightDirection.X, light.LightDirection.Y, -light.LightDirection.Z), 0),
LightAttribs = new DX.Vector4(light.SpecularPower, light.Attenuation, light.Intensity, light.SpecularEnabled ? 1 : 0),
LightType = (int)light.LightType
};
_lightData.Buffer.SetData(ref lightData);
}
/// <summary>
/// Function called to render a single effect pass.
/// </summary>
/// <param name="passIndex">The index of the pass being rendered.</param>
/// <param name="renderMethod">The method used to render a scene for the effect.</param>
/// <param name="output">The render target that will receive the final render data.</param>
/// <remarks>
/// <para>
/// Applications must implement this in order to see any results from the effect.
/// </para>
/// </remarks>
protected override void OnRenderPass(int passIndex, Action <int, int, DX.Size2> renderMethod, GorgonRenderTargetView output)
{
if (passIndex == 0)
{
renderMethod(passIndex, PassCount, new DX.Size2(output.Width, output.Height));
return;
}
// We'll do our own drawing so we can ensure we have screen space.
IGorgon2DCamera currentCamera = Renderer.CurrentCamera;
Renderer.End();
var destRect = new DX.RectangleF(0, 0, output.Width, output.Height);
float minZ = 0;
// Calculate our full screen blit area in camera projection if we're using another camera.
if (currentCamera != null)
{
minZ = currentCamera.MinimumDepth;
destRect = currentCamera.ViewableRegion;
}
for (int i = 0; i < Lights.Count; ++i)
{
Gorgon2DLight light = Lights[i];
if (light == null)
{
continue;
}
UpdateLight(light);
Renderer.Begin(_lightingState, currentCamera);
Renderer.DrawFilledRectangle(destRect,
GorgonColor.White,
_gbufferTexture,
new DX.RectangleF(0, 0, 1, 1),
textureSampler: GorgonSamplerState.Default,
depth: minZ);
Renderer.End();
}
}