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using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Rendering;
namespace UnityEngine.Experimental.Rendering.HDPipeline
{
// Keep this class first in the file. Otherwise it seems that the script type is not registered properly.
public abstract class AtmosphericScattering : VolumeComponent
{
private readonly static int m_TypeParam = Shader.PropertyToID("_AtmosphericScatteringType");
// Fog Color
private readonly static int m_ColorModeParam = Shader.PropertyToID("_FogColorMode");
private readonly static int m_FogColorDensityParam = Shader.PropertyToID("_FogColorDensity");
private readonly static int m_MipFogParam = Shader.PropertyToID("_MipFogParameters");
// Fog Color
public FogColorParameter colorMode = new FogColorParameter { value = FogColorMode.SkyColor };
[Tooltip("Constant Fog Color")]
public ColorParameter color = new ColorParameter(Color.grey);
public ClampedFloatParameter density = new ClampedFloatParameter(1.0f, 0.0f, 1.0f);
[Tooltip("Maximum mip map used for mip fog (0 being lowest and 1 highest mip).")]
public ClampedFloatParameter mipFogMaxMip = new ClampedFloatParameter(1.0f, 0.0f, 1.0f);
[Tooltip("Distance at which minimum mip of blurred sky texture is used as fog color.")]
public MinFloatParameter mipFogNear = new MinFloatParameter(0.0f, 0.0f);
[Tooltip("Distance at which maximum mip of blurred sky texture is used as fog color.")]
public MinFloatParameter mipFogFar = new MinFloatParameter(1000.0f, 0.0f);
public abstract void PushShaderParameters(CommandBuffer cmd, FrameSettings frameSettings);
public static void PushNeutralShaderParameters(CommandBuffer cmd)
{
cmd.SetGlobalFloat(m_TypeParam, (float)FogType.None);
}
public void PushShaderParametersCommon(CommandBuffer cmd, FogType type, FrameSettings frameSettings)
{
if (frameSettings.enableAtmosphericScattering)
cmd.SetGlobalFloat(m_TypeParam, (float)type);
else
cmd.SetGlobalFloat(m_TypeParam, (float)FogType.None);
// Fog Color
cmd.SetGlobalFloat(m_ColorModeParam, (float)colorMode.value);
cmd.SetGlobalColor(m_FogColorDensityParam, new Color(color.value.r, color.value.g, color.value.b, density));
cmd.SetGlobalVector(m_MipFogParam, new Vector4(mipFogNear, mipFogFar, mipFogMaxMip, 0.0f));
}
}
[GenerateHLSL]
public enum FogType
{
None,
Linear,
Exponential
}
[GenerateHLSL]
public enum FogColorMode
{
ConstantColor,
SkyColor,
}
[Serializable]
public sealed class FogTypeParameter : VolumeParameter<FogType>
{
public FogTypeParameter(FogType value, bool overrideState = false)
: base(value, overrideState)
{
}
}
[Serializable]
public sealed class FogColorParameter : VolumeParameter<FogColorMode> { }
}