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ScreenSpaceCavity.cs
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ScreenSpaceCavity.cs
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using System;
using UnityEngine;
using UnityEngine.Rendering;
using UnityEngine.Rendering.Universal;
namespace MalyaWka.ScreenSpaceCavity.Renders
{
[Serializable]
public class ScreenSpaceCavitySettings
{
internal enum CavityType { Both = 0, Curvature = 1, Cavity = 2}
[SerializeField] internal CavityType cavityType = CavityType.Both;
[SerializeField] internal bool debug = false;
[SerializeField, Delayed] internal float curvatureScale = 1.0f;
[SerializeField, Delayed] internal float curvatureRidge = 0.25f;
[SerializeField, Delayed] internal float curvatureValley = 0.25f;
[SerializeField, Delayed] internal float cavityDistance = 0.25f;
[SerializeField, Delayed] internal float cavityAttenuation = 0.015625f;
[SerializeField, Delayed] internal float cavityRidge = 1.25f;
[SerializeField, Delayed] internal float cavityValley = 1.25f;
[SerializeField, Delayed] internal int cavitySamples = 4;
}
public class ScreenSpaceCavity : ScriptableRendererFeature
{
public ScreenSpaceCavitySettings Settings => m_Settings;
[SerializeField, HideInInspector] private Shader m_Shader = null;
[SerializeField] private ScreenSpaceCavitySettings m_Settings = new ScreenSpaceCavitySettings();
private RenderTargetHandle m_DepthTexture;
private RenderTargetHandle m_NormalsTexture;
private Material m_Material;
private ScreenSpaceCavityPass m_SSCPass = null;
private const string k_ShaderName = "Hidden/MalyaWka/ScreenSpaceCavity/Cavity";
private const string k_DebugKeyword = "_CAVITY_DEBUG";
private const string k_OrthographicCameraKeyword = "_ORTHOGRAPHIC";
private const string k_TypeCurvatureKeyword = "_TYPE_CURVATURE";
private const string k_TypeCavityKeyword = "_TYPE_CAVITY";
public override void Create()
{
if (m_SSCPass == null)
{
m_SSCPass = new ScreenSpaceCavityPass();
}
GetMaterial();
m_SSCPass.profilerTag = name;
m_SSCPass.renderPassEvent = RenderPassEvent.BeforeRenderingOpaques;
}
public override void AddRenderPasses(ScriptableRenderer renderer, ref RenderingData renderingData)
{
if (!GetMaterial())
{
Debug.LogError($"{GetType().Name}.AddRenderPasses(): Missing material. {m_SSCPass.profilerTag} " +
$"render pass will not be added. Check for missing reference in the renderer resources.");
return;
}
bool shouldAdd = m_SSCPass.Setup(m_Settings);
if (shouldAdd)
{
renderer.EnqueuePass(m_SSCPass);
}
}
protected override void Dispose(bool disposing)
{
CoreUtils.Destroy(m_Material);
}
private bool GetMaterial()
{
if (m_Material != null)
{
return true;
}
if (m_Shader == null)
{
m_Shader = Shader.Find(k_ShaderName);
if (m_Shader == null)
{
return false;
}
}
m_Material = CoreUtils.CreateEngineMaterial(m_Shader);
m_SSCPass.material = m_Material;
return m_Material != null;
}
private class ScreenSpaceCavityPass : ScriptableRenderPass
{
private bool m_SupportsR8RenderTextureFormat = SystemInfo.SupportsRenderTextureFormat(RenderTextureFormat.R8);
internal string profilerTag;
internal Material material;
private ScreenSpaceCavitySettings m_CurrentSettings;
private ProfilingSampler m_ProfilingSampler = new ProfilingSampler("SSC");
private RenderTextureDescriptor m_Descriptor;
private static readonly int CurvatureParamsID = Shader.PropertyToID("_CurvatureParams");
private static readonly int CavityParamsID = Shader.PropertyToID("_CavityParams");
private static readonly int CavityTexture = Shader.PropertyToID("_CavityTexture");
private static readonly int SourceSize = Shader.PropertyToID("_SourceSize");
private static readonly string ScreenSpaceCavity = "_SCREEN_SPACE_CAVITY";
private RenderTargetIdentifier m_SSCTextureTarget =
new RenderTargetIdentifier(CavityTexture, 0, CubemapFace.Unknown, -1);
private const string k_SSCTextureName = "_ScreenSpaceCavityTexture";
internal ScreenSpaceCavityPass()
{
m_CurrentSettings = new ScreenSpaceCavitySettings();
}
internal bool Setup(ScreenSpaceCavitySettings featureSettings)
{
m_CurrentSettings = featureSettings;
ConfigureInput(ScriptableRenderPassInput.Normal);
return material != null;
}
internal static void SetSourceSize(CommandBuffer cmd, RenderTextureDescriptor desc)
{
float width = desc.width;
float height = desc.height;
if (desc.useDynamicScale)
{
width *= ScalableBufferManager.widthScaleFactor;
height *= ScalableBufferManager.heightScaleFactor;
}
cmd.SetGlobalVector(SourceSize, new Vector4(width, height, 1.0f / width, 1.0f / height));
}
public override void OnCameraSetup(CommandBuffer cmd, ref RenderingData renderingData)
{
Vector4 curvatureParams = new Vector4(
m_CurrentSettings.curvatureScale,
m_CurrentSettings.cavitySamples,
0.5f / Mathf.Max(Mathf.Sqrt(m_CurrentSettings.curvatureRidge), 1e-4f),
0.7f / Mathf.Max(Mathf.Sqrt(m_CurrentSettings.curvatureValley), 1e-4f));
material.SetVector(CurvatureParamsID, curvatureParams);
Vector4 cavityParams = new Vector4(
m_CurrentSettings.cavityDistance,
m_CurrentSettings.cavityAttenuation,
m_CurrentSettings.cavityRidge,
m_CurrentSettings.cavityValley);
material.SetVector(CavityParamsID, cavityParams);
CoreUtils.SetKeyword(material, k_OrthographicCameraKeyword, renderingData.cameraData.camera.orthographic);
switch (m_CurrentSettings.cavityType)
{
case ScreenSpaceCavitySettings.CavityType.Both:
CoreUtils.SetKeyword(material, k_TypeCurvatureKeyword, true);
CoreUtils.SetKeyword(material, k_TypeCavityKeyword, true);
break;
case ScreenSpaceCavitySettings.CavityType.Curvature:
CoreUtils.SetKeyword(material, k_TypeCurvatureKeyword, true);
CoreUtils.SetKeyword(material, k_TypeCavityKeyword, false);
break;
case ScreenSpaceCavitySettings.CavityType.Cavity:
CoreUtils.SetKeyword(material, k_TypeCurvatureKeyword, false);
CoreUtils.SetKeyword(material, k_TypeCavityKeyword, true);
break;
default:
throw new ArgumentOutOfRangeException();
}
RenderTextureDescriptor cameraTargetDescriptor = renderingData.cameraData.cameraTargetDescriptor;
m_Descriptor = cameraTargetDescriptor;
m_Descriptor.msaaSamples = 1;
m_Descriptor.depthBufferBits = 0;
m_Descriptor.colorFormat = m_SupportsR8RenderTextureFormat ? RenderTextureFormat.R8 : RenderTextureFormat.RHalf;
cmd.GetTemporaryRT(CavityTexture, m_Descriptor, FilterMode.Bilinear);
ConfigureTarget(CavityTexture);
ConfigureClear(ClearFlag.None, Color.white);
}
public override void Execute(ScriptableRenderContext context, ref RenderingData renderingData)
{
if (material == null)
{
Debug.LogError($"{GetType().Name}.Execute(): Missing material. {profilerTag} render pass " +
$"will not execute. Check for missing reference in the renderer resources.");
return;
}
CommandBuffer cmd = CommandBufferPool.Get(profilerTag);
using (new ProfilingScope(cmd, m_ProfilingSampler))
{
CoreUtils.SetKeyword(cmd, ScreenSpaceCavity, true);
CoreUtils.SetKeyword(cmd, k_DebugKeyword, m_CurrentSettings.debug);
SetSourceSize(cmd, m_Descriptor);
cmd.SetRenderTarget(
m_SSCTextureTarget,
RenderBufferLoadAction.DontCare,
RenderBufferStoreAction.Store,
m_SSCTextureTarget,
RenderBufferLoadAction.DontCare,
RenderBufferStoreAction.DontCare
);
cmd.DrawMesh(RenderingUtils.fullscreenMesh, Matrix4x4.identity, material);
cmd.SetGlobalTexture(k_SSCTextureName, m_SSCTextureTarget);
}
context.ExecuteCommandBuffer(cmd);
CommandBufferPool.Release(cmd);
}
public override void OnCameraCleanup(CommandBuffer cmd)
{
if (cmd == null)
{
throw new ArgumentNullException("cmd");
}
CoreUtils.SetKeyword(cmd, ScreenSpaceCavity, false);
CoreUtils.SetKeyword(cmd, k_DebugKeyword, false);
cmd.ReleaseTemporaryRT(CavityTexture);
}
}
}
}