65 lines
2.6 KiB
C#
65 lines
2.6 KiB
C#
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using System;
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using System.Collections.Generic;
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using UnityEngine.SceneManagement;
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namespace UnityEngine.Rendering.HighDefinition
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{
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/// <summary>
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/// Custom Pass that draws Object IDs
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/// </summary>
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[Serializable]
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public class ObjectIDCustomPass : DrawRenderersCustomPass
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{
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static readonly int k_ObjectColor = Shader.PropertyToID("ObjectColor");
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/// <summary>
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/// Called before the first execution of the pass occurs.
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/// Allow you to allocate custom buffers.
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/// </summary>
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/// <param name="renderContext">The render context</param>
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/// <param name="cmd">Current command buffer of the frame</param>
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protected override void Setup(ScriptableRenderContext renderContext, CommandBuffer cmd)
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{
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base.Setup(renderContext, cmd);
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AssignObjectIDs();
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var runtimeShaders = GraphicsSettings.GetRenderPipelineSettings<HDRenderPipelineRuntimeShaders>();
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overrideMaterial = CoreUtils.CreateEngineMaterial(runtimeShaders.objectIDPS);
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overrideMaterialPassName = "ForwardOnly";
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}
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/// <summary>
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/// Used to assign an ObjectID (in the form of a color) to every renderer in the scene.
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/// If a scene uses dynamic objects or procedural object placement, then the user script should call
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/// this function to assign Object IDs to the new objects.
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/// </summary>
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public virtual void AssignObjectIDs()
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{
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var sceneCount = SceneManager.sceneCount;
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var rendererList = new List<Renderer>();
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for (var i = 0; i < sceneCount; i++)
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{
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var scene = SceneManager.GetSceneAt(i);
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if (!scene.IsValid() || !scene.isLoaded) continue;
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var rootGameObjects = scene.GetRootGameObjects();
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foreach (var rootGameObject in rootGameObjects)
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{
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rendererList.AddRange(rootGameObject.GetComponentsInChildren<Renderer>());
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}
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}
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var renderListCount = rendererList.Count;
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for (var i = 0; i < renderListCount; i++)
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{
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var renderer = rendererList[i];
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var propertyBlock = new MaterialPropertyBlock();
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//it could be just i / renderListCount but I wanted to have more separation between colors
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var hue = (float) ( i * 3 % renderListCount) / renderListCount;
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propertyBlock.SetColor(k_ObjectColor, Color.HSVToRGB(hue, 0.7f, 1.0f));
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renderer.SetPropertyBlock(propertyBlock);
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}
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}
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}
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}
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