//internal abstract void PushShaderParameters(HDCamera hdCamera, CommandBuffer cmd);
public virtual void PushShaderParameters(HDCamera hdCamera, CommandBuffer cmd)
{
cmd.SetGlobalInt(HDShaderIDs._FogEnabled, 1);
cmd.SetGlobalFloat(HDShaderIDs._MaxFogDistance, maxFogDistance.value);
// Fog Color
cmd.SetGlobalFloat(m_ColorModeParam, (float)colorMode.value);
cmd.SetGlobalColor(m_FogColorParam, new Color(color.value.r, color.value.g, color.value.b, 0.0f));
cmd.SetGlobalVector(m_MipFogParam, new Vector4(mipFogNear.value, mipFogFar.value, mipFogMaxMip.value, 0.0f));
DensityVolumeArtistParameters param = new DensityVolumeArtistParameters(albedo.value, meanFreePath.value, anisotropy.value);
DensityVolumeEngineData data = param.ConvertToEngineData();
cmd.SetGlobalVector(HDShaderIDs._HeightFogBaseScattering, data.scattering);
cmd.SetGlobalFloat(HDShaderIDs._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);
cmd.SetGlobalVector(HDShaderIDs._HeightFogExponents, new Vector2(1.0f / H, H));
cmd.SetGlobalFloat(HDShaderIDs._HeightFogBaseHeight, crBaseHeight);
bool enableVolumetrics = enableVolumetricFog.value && hdCamera.frameSettings.IsEnabled(FrameSettingsField.Volumetrics);
cmd.SetGlobalFloat(HDShaderIDs._GlobalFogAnisotropy, anisotropy.value);
cmd.SetGlobalInt(HDShaderIDs._EnableVolumetricFog, enableVolumetrics ? 1 : 0);
}
internal DensityVolumeEngineData ConvertToEngineData()
{
DensityVolumeEngineData data = new DensityVolumeEngineData();
data.extinction = VolumeRenderingUtils.ExtinctionFromMeanFreePath(meanFreePath);
data.scattering = VolumeRenderingUtils.ScatteringFromExtinctionAndAlbedo(data.extinction, (Vector3)(Vector4)albedo);
data.textureIndex = textureIndex;
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;
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);
DensityVolumeArtistParameters param = new DensityVolumeArtistParameters(albedo.value, meanFreePath.value, anisotropy.value);
DensityVolumeEngineData 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;
}
internal DensityVolumeEngineData ConvertToEngineData()
{
DensityVolumeEngineData data = new DensityVolumeEngineData();
data.extinction = VolumeRenderingUtils.ExtinctionFromMeanFreePath(meanFreePath);
data.scattering = VolumeRenderingUtils.ScatteringFromExtinctionAndAlbedo(data.extinction, (Vector4)albedo);
var atlas = DensityVolumeManager.manager.volumeAtlas.GetAtlas();
data.atlasOffset = DensityVolumeManager.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);
}
