internal LocalVolumetricFogEngineData ConvertToEngineData()
{
LocalVolumetricFogEngineData data = new LocalVolumetricFogEngineData();
data.extinction = VolumeRenderingUtils.ExtinctionFromMeanFreePath(meanFreePath);
data.scattering = VolumeRenderingUtils.ScatteringFromExtinctionAndAlbedo(data.extinction, (Vector4)albedo);
var atlas = LocalVolumetricFogManager.manager.volumeAtlas.GetAtlas();
data.atlasOffset = LocalVolumetricFogManager.manager.volumeAtlas.GetTextureOffset(volumeMask);
data.atlasOffset.x /= (float)atlas.width;
data.atlasOffset.y /= (float)atlas.height;
data.atlasOffset.z /= (float)atlas.volumeDepth;
data.useVolumeMask = volumeMask != null ? 1 : 0;
float volumeMaskSize = volumeMask != null ? (float)volumeMask.width : 0.0f; // Volume Mask Textures are always cubic
data.maskSize = new Vector4(volumeMaskSize / atlas.width, volumeMaskSize / atlas.height, volumeMaskSize / atlas.volumeDepth, volumeMaskSize);
data.textureScroll = textureOffset;
data.textureTiling = textureTiling;
// Clamp to avoid NaNs.
Vector3 positiveFade = this.positiveFade;
Vector3 negativeFade = this.negativeFade;
data.rcpPosFaceFade.x = Mathf.Min(1.0f / positiveFade.x, float.MaxValue);
data.rcpPosFaceFade.y = Mathf.Min(1.0f / positiveFade.y, float.MaxValue);
data.rcpPosFaceFade.z = Mathf.Min(1.0f / positiveFade.z, float.MaxValue);
data.rcpNegFaceFade.y = Mathf.Min(1.0f / negativeFade.y, float.MaxValue);
data.rcpNegFaceFade.x = Mathf.Min(1.0f / negativeFade.x, float.MaxValue);
data.rcpNegFaceFade.z = Mathf.Min(1.0f / negativeFade.z, float.MaxValue);
data.invertFade = invertFade ? 1 : 0;
data.falloffMode = falloffMode;
float distFadeLen = Mathf.Max(distanceFadeEnd - distanceFadeStart, 0.00001526f);
data.rcpDistFadeLen = 1.0f / distFadeLen;
data.endTimesRcpDistFadeLen = distanceFadeEnd * data.rcpDistFadeLen;
return(data);
}
void UpdateShaderVariablesGlobalCBFogParameters(ref ShaderVariablesGlobal cb, HDCamera hdCamera)
{
bool enableVolumetrics = enableVolumetricFog.value && hdCamera.frameSettings.IsEnabled(FrameSettingsField.Volumetrics);
cb._FogEnabled = 1;
cb._PBRFogEnabled = IsPBRFogEnabled(hdCamera) ? 1 : 0;
cb._EnableVolumetricFog = enableVolumetrics ? 1 : 0;
cb._MaxFogDistance = maxFogDistance.value;
Color fogColor = (colorMode.value == FogColorMode.ConstantColor) ? color.value : tint.value;
cb._FogColorMode = (float)colorMode.value;
cb._FogColor = new Color(fogColor.r, fogColor.g, fogColor.b, 0.0f);
cb._MipFogParameters = new Vector4(mipFogNear.value, mipFogFar.value, mipFogMaxMip.value, 0.0f);
LocalVolumetricFogArtistParameters param = new LocalVolumetricFogArtistParameters(albedo.value, meanFreePath.value, anisotropy.value);
LocalVolumetricFogEngineData data = param.ConvertToEngineData();
cb._HeightFogBaseScattering = data.scattering;
cb._HeightFogBaseExtinction = data.extinction;
float crBaseHeight = baseHeight.value;
if (ShaderConfig.s_CameraRelativeRendering != 0)
{
crBaseHeight -= hdCamera.camera.transform.position.y;
}
float layerDepth = Mathf.Max(0.01f, maximumHeight.value - baseHeight.value);
float H = ScaleHeightFromLayerDepth(layerDepth);
cb._HeightFogExponents = new Vector2(1.0f / H, H);
cb._HeightFogBaseHeight = crBaseHeight;
cb._GlobalFogAnisotropy = anisotropy.value;
cb._VolumetricFilteringEnabled = ((int)denoisingMode.value & (int)FogDenoisingMode.Gaussian) != 0 ? 1 : 0;
cb._FogDirectionalOnly = directionalLightsOnly.value ? 1 : 0;
}
