public override void SetRenderTargets(BuiltinSkyParameters builtinParams)
{
// We do not bind the depth buffer as a depth-stencil target since it is
// bound as a color texture which is then sampled from within the shader.
Utilities.SetRenderTarget(builtinParams.renderContext, builtinParams.colorBuffer);
}
void SetUniforms(BuiltinSkyParameters builtinParams, ProceduralSkySettings param, bool renderForCubemap, ref MaterialPropertyBlock properties)
{
properties.SetTexture("_Cubemap", param.skyHDRI);
properties.SetVector("_SkyParam", new Vector4(param.exposure, param.multiplier, param.rotation, 0.0f));
properties.SetMatrix("_InvViewProjMatrix", builtinParams.invViewProjMatrix);
properties.SetVector("_CameraPosWS", builtinParams.cameraPosWS);
properties.SetVector("_ScreenSize", builtinParams.screenSize);
m_ProceduralSkyMaterial.SetInt("_AtmosphericsDebugMode", (int)param.debugMode);
Vector3 sunDirection = (builtinParams.sunLight != null) ? -builtinParams.sunLight.transform.forward : Vector3.zero;
m_ProceduralSkyMaterial.SetVector("_SunDirection", sunDirection);
var pixelRect = new Rect(0f, 0f, builtinParams.screenSize.x, builtinParams.screenSize.y);
var scale = 1.0f; //(float)(int)occlusionDownscale;
var depthTextureScaledTexelSize = new Vector4(scale / pixelRect.width,
scale / pixelRect.height,
-scale / pixelRect.width,
-scale / pixelRect.height);
properties.SetVector("_DepthTextureScaledTexelSize", depthTextureScaledTexelSize);
/*
* m_ProceduralSkyMaterial.SetFloat("_ShadowBias", useOcclusion ? occlusionBias : 1f);
* m_ProceduralSkyMaterial.SetFloat("_ShadowBiasIndirect", useOcclusion ? occlusionBiasIndirect : 1f);
* m_ProceduralSkyMaterial.SetFloat("_ShadowBiasClouds", useOcclusion ? occlusionBiasClouds : 1f);
* m_ProceduralSkyMaterial.SetVector("_ShadowBiasSkyRayleighMie", useOcclusion ? new Vector4(occlusionBiasSkyRayleigh, occlusionBiasSkyMie, 0f, 0f) : Vector4.zero);
* m_ProceduralSkyMaterial.SetFloat("_OcclusionDepthThreshold", occlusionDepthThreshold);
* m_ProceduralSkyMaterial.SetVector("_OcclusionTexture_TexelSize", ???);
*/
m_ProceduralSkyMaterial.SetFloat("_WorldScaleExponent", param.worldScaleExponent);
m_ProceduralSkyMaterial.SetFloat("_WorldNormalDistanceRcp", 1f / param.worldNormalDistance);
m_ProceduralSkyMaterial.SetFloat("_WorldMieNearScatterPush", -Mathf.Pow(Mathf.Abs(param.worldMieNearScatterPush), param.worldScaleExponent) * Mathf.Sign(param.worldMieNearScatterPush));
m_ProceduralSkyMaterial.SetFloat("_WorldRayleighNearScatterPush", -Mathf.Pow(Mathf.Abs(param.worldRayleighNearScatterPush), param.worldScaleExponent) * Mathf.Sign(param.worldRayleighNearScatterPush));
m_ProceduralSkyMaterial.SetFloat("_WorldRayleighDensity", -param.worldRayleighDensity / 100000f);
m_ProceduralSkyMaterial.SetFloat("_WorldMieDensity", -param.worldMieDensity / 100000f);
var rayleighColorM20 = param.worldRayleighColorRamp.Evaluate(0.00f);
var rayleighColorM10 = param.worldRayleighColorRamp.Evaluate(0.25f);
var rayleighColorO00 = param.worldRayleighColorRamp.Evaluate(0.50f);
var rayleighColorP10 = param.worldRayleighColorRamp.Evaluate(0.75f);
var rayleighColorP20 = param.worldRayleighColorRamp.Evaluate(1.00f);
var mieColorM20 = param.worldMieColorRamp.Evaluate(0.00f);
var mieColorO00 = param.worldMieColorRamp.Evaluate(0.50f);
var mieColorP20 = param.worldMieColorRamp.Evaluate(1.00f);
m_ProceduralSkyMaterial.SetVector("_RayleighColorM20", (Vector4)rayleighColorM20 * param.worldRayleighColorIntensity);
m_ProceduralSkyMaterial.SetVector("_RayleighColorM10", (Vector4)rayleighColorM10 * param.worldRayleighColorIntensity);
m_ProceduralSkyMaterial.SetVector("_RayleighColorO00", (Vector4)rayleighColorO00 * param.worldRayleighColorIntensity);
m_ProceduralSkyMaterial.SetVector("_RayleighColorP10", (Vector4)rayleighColorP10 * param.worldRayleighColorIntensity);
m_ProceduralSkyMaterial.SetVector("_RayleighColorP20", (Vector4)rayleighColorP20 * param.worldRayleighColorIntensity);
m_ProceduralSkyMaterial.SetVector("_MieColorM20", (Vector4)mieColorM20 * param.worldMieColorIntensity);
m_ProceduralSkyMaterial.SetVector("_MieColorO00", (Vector4)mieColorO00 * param.worldMieColorIntensity);
m_ProceduralSkyMaterial.SetVector("_MieColorP20", (Vector4)mieColorP20 * param.worldMieColorIntensity);
m_ProceduralSkyMaterial.SetFloat("_HeightNormalDistanceRcp", 1f / param.heightNormalDistance);
m_ProceduralSkyMaterial.SetFloat("_HeightMieNearScatterPush", -Mathf.Pow(Mathf.Abs(param.heightMieNearScatterPush), param.worldScaleExponent) * Mathf.Sign(param.heightMieNearScatterPush));
m_ProceduralSkyMaterial.SetFloat("_HeightRayleighNearScatterPush", -Mathf.Pow(Mathf.Abs(param.heightRayleighNearScatterPush), param.worldScaleExponent) * Mathf.Sign(param.heightRayleighNearScatterPush));
// m_ProceduralSkyMaterial.SetFloat("_HeightRayleighDensity", -param.heightRayleighDensity / 100000f);
// m_ProceduralSkyMaterial.SetFloat("_HeightMieDensity", -param.heightMieDensity / 100000f);
m_ProceduralSkyMaterial.SetFloat("_HeightSeaLevel", param.heightSeaLevel);
m_ProceduralSkyMaterial.SetVector("_HeightPlaneShift", param.heightPlaneShift);
m_ProceduralSkyMaterial.SetFloat("_HeightDistanceRcp", 1f / param.heightDistance);
m_ProceduralSkyMaterial.SetVector("_HeightRayleighColor", (Vector4)param.heightRayleighColor * param.heightRayleighIntensity);
m_ProceduralSkyMaterial.SetFloat("_HeightExtinctionFactor", param.heightExtinctionFactor);
m_ProceduralSkyMaterial.SetVector("_RayleighInScatterPct", new Vector4(1f - param.worldRayleighIndirectScatter, param.worldRayleighIndirectScatter, 0f, 0f));
m_ProceduralSkyMaterial.SetFloat("_RayleighExtinctionFactor", param.worldRayleighExtinctionFactor);
m_ProceduralSkyMaterial.SetFloat("_MiePhaseAnisotropy", param.worldMiePhaseAnisotropy);
m_ProceduralSkyMaterial.SetFloat("_MieExtinctionFactor", param.worldMieExtinctionFactor);
// Since we use the material for rendering the sky both into the cubemap, and
// during the fullscreen pass, setting the 'PERFORM_SKY_OCCLUSION_TEST' keyword has no effect.
properties.SetFloat("_DisableSkyOcclusionTest", renderForCubemap ? 1.0f : 0.0f);
// We flip the screens-space Y axis in case we follow the D3D convention.
properties.SetFloat("_FlipY", renderForCubemap ? 1.0f : 0.0f);
// We do not render the height fog into the sky IBL cubemap.
properties.SetFloat("_HeightRayleighDensity", renderForCubemap ? -0.0f : -param.heightRayleighDensity / 100000f);
properties.SetFloat("_HeightMieDensity", renderForCubemap ? -0.0f : -param.heightMieDensity / 100000f);
}
private void RenderCubemapGGXConvolution(ScriptableRenderContext renderContext, BuiltinSkyParameters builtinParams, SkySettings skyParams, Texture input, RenderTexture target)
{
/*
* using (new Utilities.ProfilingSample("Sky Pass: GGX Convolution", renderContext))
* {
* int mipCount = 1 + (int)Mathf.Log(input.width, 2.0f);
* if (mipCount < ((int)EnvConstants.SpecCubeLodStep + 1))
* {
* Debug.LogWarning("RenderCubemapGGXConvolution: Cubemap size is too small for GGX convolution, needs at least " + ((int)EnvConstants.SpecCubeLodStep + 1) + " mip levels");
* return;
* }
*
* if (!m_iblFilterGgx.IsInitialized())
* {
* m_iblFilterGgx.Initialize(renderContext);
* }
*
* // Copy the first mip
* var cmd = new CommandBuffer { name = "" };
* for (int f = 0; f < 6; f++)
* {
* cmd.CopyTexture(input, f, 0, target, f, 0);
* }
* renderContext.ExecuteCommandBuffer(cmd);
* cmd.Dispose();
*
* if (m_useMIS && m_iblFilterGgx.SupportMIS)
* {
* m_iblFilterGgx.FilterCubemapMIS(renderContext, input, target, mipCount, m_SkyboxConditionalCdfRT, m_SkyboxMarginalRowCdfRT, m_CubemapFaceMesh);
* }
* else
* {
* m_iblFilterGgx.FilterCubemap(renderContext, input, target, mipCount, m_CubemapFaceMesh);
* }
* }
*/
}
