public CubemapSceneRenderer(ISceneRendererContext context, int textureSize)
{
this.context = context;
Camera = new CameraComponent
{
UseCustomProjectionMatrix = true,
UseCustomViewMatrix = true,
};
// Replace graphics compositor (don't want post fx, etc...)
gameCompositor = context.SceneSystem.GraphicsCompositor.Game;
context.SceneSystem.GraphicsCompositor.Game = new SceneExternalCameraRenderer {
Child = context.SceneSystem.GraphicsCompositor.SingleView, ExternalCamera = Camera
};
// Setup projection matrix
Camera.ProjectionMatrix = Matrix.PerspectiveFovRH(MathUtil.DegreesToRadians(90.0f), 1.0f, Camera.NearClipPlane, Camera.FarClipPlane);
var renderContext = RenderContext.GetShared(context.Services);
DrawContext = new RenderDrawContext(context.Services, renderContext, context.GraphicsContext);
// We can't render directly to the texture cube before feature level 10.1, so let's render to a standard render target and copy instead
renderTarget = Texture.New2D(context.GraphicsDevice, textureSize, textureSize, PixelFormat.R16G16B16A16_Float, TextureFlags.RenderTarget);
depthStencil = Texture.New2D(context.GraphicsDevice, textureSize, textureSize, PixelFormat.D24_UNorm_S8_UInt, TextureFlags.DepthStencil);
}
public CubemapSceneRenderer(ISceneRendererContext context, int textureSize)
: base(context.GraphicsDevice, textureSize, PixelFormat.R16G16B16A16_Float, true)
{
this.context = context;
var renderContext = RenderContext.GetShared(context.Services);
DrawContext = new RenderDrawContext(context.Services, renderContext, context.GraphicsContext);
// Replace graphics compositor (don't want post fx, etc...)
gameCompositor = context.SceneSystem.GraphicsCompositor.Game;
context.SceneSystem.GraphicsCompositor.Game = new SceneExternalCameraRenderer {
Child = context.SceneSystem.GraphicsCompositor.SingleView, ExternalCamera = Camera
};
}
public static Texture GenerateCubemap(ISceneRendererContext context, Vector3 position, int textureSize)
{
using (var cubemapRenderer = new CubemapSceneRenderer(context, textureSize))
{
// Create target cube texture
var cubeTexture = Texture.NewCube(context.GraphicsDevice, textureSize, PixelFormat.R16G16B16A16_Float);
using (cubemapRenderer.DrawContext.PushRenderTargetsAndRestore())
{
// Render specular probe
context.GraphicsContext.CommandList.BeginProfile(Color.Red, "SpecularProbe");
cubemapRenderer.Draw(position, cubeTexture);
context.GraphicsContext.CommandList.EndProfile();
}
return(cubeTexture);
}
}
public static Dictionary <LightProbeComponent, FastList <Color3> > GenerateCoefficients(ISceneRendererContext context)
{
using (var cubemapRenderer = new CubemapSceneRenderer(context, 256))
{
// Create target cube texture
var cubeTexture = Texture.NewCube(context.GraphicsDevice, 256, PixelFormat.R16G16B16A16_Float);
// Prepare shader for SH prefiltering
var lambertFiltering = new LambertianPrefilteringSHNoCompute(cubemapRenderer.DrawContext.RenderContext)
{
HarmonicOrder = LambertHamonicOrder,
RadianceMap = cubeTexture,
};
var lightProbesCoefficients = new Dictionary <LightProbeComponent, FastList <Color3> >();
using (cubemapRenderer.DrawContext.PushRenderTargetsAndRestore())
{
// Render light probe
context.GraphicsContext.CommandList.BeginProfile(Color.Red, "LightProbes");
int lightProbeIndex = 0;
foreach (var entity in context.SceneSystem.SceneInstance)
{
var lightProbe = entity.Get <LightProbeComponent>();
if (lightProbe == null)
{
continue;
}
var lightProbePosition = lightProbe.Entity.Transform.WorldMatrix.TranslationVector;
context.GraphicsContext.ResourceGroupAllocator.Reset(context.GraphicsContext.CommandList);
context.GraphicsContext.CommandList.BeginProfile(Color.Red, $"LightProbes {lightProbeIndex}");
lightProbeIndex++;
cubemapRenderer.Draw(lightProbePosition, cubeTexture);
context.GraphicsContext.CommandList.BeginProfile(Color.Red, "Prefilter SphericalHarmonics");
// Compute SH coefficients
lambertFiltering.Draw(cubemapRenderer.DrawContext);
var coefficients = lambertFiltering.PrefilteredLambertianSH.Coefficients;
var lightProbeCoefficients = new FastList <Color3>();
for (int i = 0; i < coefficients.Length; i++)
{
lightProbeCoefficients.Add(coefficients[i] * SphericalHarmonics.BaseCoefficients[i]);
}
lightProbesCoefficients.Add(lightProbe, lightProbeCoefficients);
context.GraphicsContext.CommandList.EndProfile(); // Prefilter SphericalHarmonics
context.GraphicsContext.CommandList.EndProfile(); // Face XXX
// Debug render
}
context.GraphicsContext.CommandList.EndProfile(); // LightProbes
}
cubeTexture.Dispose();
return(lightProbesCoefficients);
}
}
public static Texture GenerateCubemap(ISceneRendererContext context, Vector3 position, int textureSize)
{
return(GenerateCubemap(new CubemapSceneRenderer(context, textureSize), position));
}
