PCSS Light script

원문 링크 : https://github.com/TheMasonX/UnityPCSS  
https://github.com/h33p/Unity-Graphics-Demo/tree/master?tab=readme-ov-file

using System.Collections; using System.Collections.Generic; using UnityEngine; using UnityEngine.Rendering; [ExecuteInEditMode] public class PCSSLight : MonoBehaviour {     public int resolution = 4096;     public bool customShadowResolution = false;     [Space(20f)]     [Range(1, 64)]     public int Blocker_SampleCount = 16;     [Range(1, 64)]     public int PCF_SampleCount = 16;     [Space(20f)]     public bool RotateSamples = true;     public bool UseNoiseTexture = true;     public Texture2D noiseTexture;     [Space(20f)]     [Range(0f, 7.5f)]     public float Softness = 1f;     [Range(0f, 5f)]     public float SoftnessFalloff = 4f;     //[Range(0f, 1f)]     //public float NearPlane = .1f;     [Space(20f)]     [Range(0f, 0.15f)]     public float MaxStaticGradientBias = .05f;     [Range(0f, 1f)]     public float Blocker_GradientBias = 0f;     [Range(0f, 1f)]     public float PCF_GradientBias = 1f;     /* Unity's Cascade Blending doesn't work quite right - Might be able to do something about it when I have time to research it more */     [Space(20f)]     [Range(0f, 1f)]     public float CascadeBlendDistance = .5f;     [Space(20f)]     public bool supportOrthographicProjection;     [Space(20f)]     public RenderTexture shadowRenderTexture;     public RenderTextureFormat format = RenderTextureFormat.RFloat;     public FilterMode filterMode = FilterMode.Bilinear;     private LightEvent lightEvent = LightEvent.AfterShadowMap;     public string shaderName = "Hidden/PCSS";     private Shader shader;     private int shadowmapPropID;     private CommandBuffer copyShadowBuffer;     private Light _light;     #region Initialization     public void OnEnable ()     {         Setup();     }     public void OnDisable ()     {         ResetShadowMode();     }     [ContextMenu("Reinitialize")]     public void Setup ()     {         _light = GetComponent<Light>();         if (!_light)             return;         resolution = Mathf.ClosestPowerOfTwo(resolution);         if (customShadowResolution)             _light.shadowCustomResolution = resolution;         else             _light.shadowCustomResolution = 0;         shader = Shader.Find(shaderName);         shadowmapPropID = Shader.PropertyToID("_ShadowMap");         copyShadowBuffer = new CommandBuffer();         copyShadowBuffer.name = "PCSS Shadows";                  var buffers = _light.GetCommandBuffers(lightEvent);         for (int i = 0; i < buffers.Length; i++)         {             if(buffers[i].name == "PCSS Shadows")             {                 _light.RemoveCommandBuffer(lightEvent, buffers[i]);             }         }         _light.AddCommandBuffer(lightEvent, copyShadowBuffer);         GraphicsSettings.SetCustomShader(BuiltinShaderType.ScreenSpaceShadows, shader);         GraphicsSettings.SetShaderMode(BuiltinShaderType.ScreenSpaceShadows, BuiltinShaderMode.UseCustom);         CreateShadowRenderTexture();         UpdateShaderValues();         UpdateCommandBuffer();     }     public void CreateShadowRenderTexture ()     {         shadowRenderTexture = new RenderTexture(resolution, resolution, 0, format);         shadowRenderTexture.filterMode = filterMode;         shadowRenderTexture.useMipMap = false;     }     [ContextMenu("Reset Shadows To Default")]     public void ResetShadowMode ()     {         GraphicsSettings.SetCustomShader(BuiltinShaderType.ScreenSpaceShadows, Shader.Find("Hidden/Internal-ScreenSpaceShadows"));         GraphicsSettings.SetShaderMode(BuiltinShaderType.ScreenSpaceShadows, BuiltinShaderMode.Disabled);         _light.shadowCustomResolution = 0;         DestroyImmediate(shadowRenderTexture);         GraphicsSettings.SetShaderMode(BuiltinShaderType.ScreenSpaceShadows, BuiltinShaderMode.UseBuiltin);         if (!_light)             return;         _light.RemoveCommandBuffer(LightEvent.AfterShadowMap, copyShadowBuffer);     }     #endregion     #region UpdateSettings     public void UpdateShaderValues ()     {         Shader.SetGlobalInt("Blocker_Samples", Blocker_SampleCount);         Shader.SetGlobalInt("PCF_Samples", PCF_SampleCount);         if (shadowRenderTexture)         {             if (shadowRenderTexture.format != format)                 CreateShadowRenderTexture();             else                 shadowRenderTexture.filterMode = filterMode;         }         Shader.SetGlobalFloat("Softness", Softness / 64f / Mathf.Sqrt(QualitySettings.shadowDistance));         Shader.SetGlobalFloat("SoftnessFalloff", Mathf.Exp(SoftnessFalloff));         SetFlag("USE_FALLOFF", SoftnessFalloff > Mathf.Epsilon);         //Shader.SetGlobalFloat("NearPlane", NearPlane);         Shader.SetGlobalFloat("RECEIVER_PLANE_MIN_FRACTIONAL_ERROR", MaxStaticGradientBias);         Shader.SetGlobalFloat("Blocker_GradientBias", Blocker_GradientBias);         Shader.SetGlobalFloat("PCF_GradientBias", PCF_GradientBias);         SetFlag("USE_CASCADE_BLENDING", CascadeBlendDistance > 0);         Shader.SetGlobalFloat("CascadeBlendDistance", CascadeBlendDistance);         SetFlag("USE_STATIC_BIAS", MaxStaticGradientBias > 0);         SetFlag("USE_BLOCKER_BIAS", Blocker_GradientBias > 0);         SetFlag("USE_PCF_BIAS", PCF_GradientBias > 0);         SetFlag("ROTATE_SAMPLES", RotateSamples);         SetFlag("USE_NOISE_TEX", UseNoiseTexture);         if (noiseTexture)         {             Shader.SetGlobalVector("NoiseCoords", new Vector4(1f / noiseTexture.width, 1f / noiseTexture.height, 0f, 0f));             Shader.SetGlobalTexture("_NoiseTexture", noiseTexture);         }         SetFlag("ORTHOGRAPHIC_SUPPORTED", supportOrthographicProjection);         int maxSamples = Mathf.Max(Blocker_SampleCount, PCF_SampleCount);         SetFlag("POISSON_32", maxSamples < 33);         SetFlag("POISSON_64", maxSamples > 33);     }     public void UpdateCommandBuffer ()     {         if (!_light)             return;         copyShadowBuffer.Clear();         copyShadowBuffer.SetShadowSamplingMode(BuiltinRenderTextureType.CurrentActive, ShadowSamplingMode.RawDepth);         copyShadowBuffer.Blit(BuiltinRenderTextureType.CurrentActive, shadowRenderTexture);         copyShadowBuffer.SetGlobalTexture(shadowmapPropID, shadowRenderTexture);     }     #endregion     public void SetFlag (string shaderKeyword, bool value)     {         if (value)             Shader.EnableKeyword(shaderKeyword);         else             Shader.DisableKeyword(shaderKeyword);     } }