最终效果
文章目录
前言
今天和大家一起来学习一下unity2022版本新出的全屏shader graph,如果在2022之前想要实现全屏shader,可能还需要自己写脚本,但是在2022.2的版本之后,unity将它纳入了进来。
unity2022版本 Fullscreen shader graph
首先,请注意你的Inity版本,是不是2022.2以上,并且项目是URP项且
基本配置
紧接着我们创建一个Fullscreen shader graph
下面我们就要使用它了,修改URP配置,添加Full Screen Pass Renderer Feature
将我们shader相关的全屏材质给到Pass Material
这时你会发现Game视图变成了灰色
修改shader graph
创建极坐标节点,分离他的输出,输出的R就是中间黑四周白的渐变,然后将它通过乘幂函数进行调整,让黑色区域更大
我们需要将shader的Blend Mode设置为Alpha,不然看不到效果
效果
边缘效果
现在我们来创建一个泰森多边形,也叫沃洛诺伊图,将它和我们的透明度遮罩相乘,得到一个新的遮罩,然后再连接给最终的透明度通道
效果
动起来
然后我们让他动起来,这无疑用到了移动套装,时间节点乘以一个速度,然后进行偏移,之后连接给Angle offset,这样泰森多边形就动起来了
效果
优化
我们将最终的输出用Clamp节点限制一下范围0到1,避免不必要的显示错误
黑白过渡这里太明显了,我们先乘以一个较小的值处理
这里我乘以0.8然后Power指数改为5,感觉这样还不错
效果
科幻风
有趣的是,如果我们将泰森多边形的Cells作为输出,那么我们就会得到一个科幻风的效果
效果
制作一些变量
你可以根据自己的喜好调整这些参数,但为了更加方便的进行控制,下面我们将制作一些变量,跟着我做
颜色
接下来是指数部分,他影响遮罩的范围,所以定义一个float类型的变量,就叫range,默认值5
乘幂之前的这个相乘的数值,控制透明的力度,就叫他strength
泰森多边形的大小也做一个变量,就叫他Size
移动速度做一个变量,叫Speed
接下来是泰森多边形的输出,我们需要一个Branch分支节点来控制不同的输出,这样,控制Predicate是否为True,就可以控制输出了。我们也个他做成一个布尔类型的变量,就叫Cells
最终效果
最终节点图
代码控制
挂载
2022之前版本
正如前面所说,2022之前版本需要自己写脚本,好在github上已经有大佬帮我们写好了,我们不用关心怎么做的,只要会用就行。
下载 Blit Render Feature 脚本
github地址:https://github.com/Cyanilux/URP_BlitRenderFeature
复制Blit.cs脚本到我们本地
打不开或者嫌麻烦的,复制我下面的代码就行了,我已经复制过来了
using UnityEngine;
using UnityEngine.Rendering;
using UnityEngine.Rendering.Universal;
/* * Blit Renderer Feature https://github.com/Cyanilux/URP_BlitRenderFeature * ------------------------------------------------------------------------------------------------------------------------ * Based on the Blit from the UniversalRenderingExamples * https://github.com/Unity-Technologies/UniversalRenderingExamples/tree/master/Assets/Scripts/Runtime/RenderPasses * * Extended to allow for : * - Specific access to selecting a source and destination (via current camera's color / texture id / render texture object * - (Pre-2021.2/v12) Automatic switching to using _AfterPostProcessTexture for After Rendering event, in order to correctly handle the blit after post processing is applied * - Setting a _InverseView matrix (cameraToWorldMatrix), for shaders that might need it to handle calculations from screen space to world. * e.g. Reconstruct world pos from depth : https://www.cyanilux.com/tutorials/depth/#blit-perspective * - (2020.2/v10 +) Enabling generation of DepthNormals (_CameraNormalsTexture) * This will only include shaders who have a DepthNormals pass (mostly Lit Shaders / Graphs) (workaround for Unlit Shaders / Graphs: https://gist.github.com/Cyanilux/be5a796cf6ddb20f20a586b94be93f2b) * ------------------------------------------------------------------------------------------------------------------------ * @Cyanilux */
namespace Cyan {
/* CreateAssetMenu here allows creating the ScriptableObject without being attached to a Renderer Asset Can then Enqueue the pass manually via https://gist.github.com/Cyanilux/8fb3353529887e4184159841b8cad208 as a workaround for 2D Renderer not supporting features (prior to 2021.2). Uncomment if needed. */
// [CreateAssetMenu(menuName = "Cyan/Blit")]
public class Blit : ScriptableRendererFeature {
public class BlitPass : ScriptableRenderPass {
public Material blitMaterial = null;
public FilterMode filterMode {
get; set; }
private BlitSettings settings;
private RenderTargetIdentifier source {
get; set; }
private RenderTargetIdentifier destination {
get; set; }
RenderTargetHandle m_TemporaryColorTexture;
RenderTargetHandle m_DestinationTexture;
string m_ProfilerTag;
#if !UNITY_2020_2_OR_NEWER // v8
private ScriptableRenderer renderer;
#endif
public BlitPass(RenderPassEvent renderPassEvent, BlitSettings settings, string tag) {
this.renderPassEvent = renderPassEvent;
this.settings = settings;
blitMaterial = settings.blitMaterial;
m_ProfilerTag = tag;
m_TemporaryColorTexture.Init("_TemporaryColorTexture");
if (settings.dstType == Target.TextureID) {
m_DestinationTexture.Init(settings.dstTextureId);
}
}
public void Setup(ScriptableRenderer renderer) {
#if UNITY_2020_2_OR_NEWER // v10+
if (settings.requireDepthNormals)
ConfigureInput(ScriptableRenderPassInput.Normal);
#else // v8
this.renderer = renderer;
#endif
}
public override void Execute(ScriptableRenderContext context, ref RenderingData renderingData) {
CommandBuffer cmd = CommandBufferPool.Get(m_ProfilerTag);
RenderTextureDescriptor opaqueDesc = renderingData.cameraData.cameraTargetDescriptor;
opaqueDesc.depthBufferBits = 0;
// Set Source / Destination
#if UNITY_2020_2_OR_NEWER // v10+
var renderer = renderingData.cameraData.renderer;
#else // v8
// For older versions, cameraData.renderer is internal so can't be accessed. Will pass it through from AddRenderPasses instead
var renderer = this.renderer;
#endif
// note : Seems this has to be done in here rather than in AddRenderPasses to work correctly in 2021.2+
if (settings.srcType == Target.CameraColor) {
source = renderer.cameraColorTarget;
} else if (settings.srcType == Target.TextureID) {
source = new RenderTargetIdentifier(settings.srcTextureId);
} else if (settings.srcType == Target.RenderTextureObject) {
source = new RenderTargetIdentifier(settings.srcTextureObject);
}
if (settings.dstType == Target.CameraColor) {
destination = renderer.cameraColorTarget;
} else if (settings.dstType == Target.TextureID) {
destination = new RenderTargetIdentifier(settings.dstTextureId);
} else if (settings.dstType == Target.RenderTextureObject) {
destination = new RenderTargetIdentifier(settings.dstTextureObject);
}
if (settings.setInverseViewMatrix) {
Shader.SetGlobalMatrix("_InverseView", renderingData.cameraData.camera.cameraToWorldMatrix);
}
if (settings.dstType == Target.TextureID) {
if (settings.overrideGraphicsFormat) {
opaqueDesc.graphicsFormat = settings.graphicsFormat;
}
cmd.GetTemporaryRT(m_DestinationTexture.id, opaqueDesc, filterMode);
}
//Debug.Log($"src = {source}, dst = {destination} ");
// Can't read and write to same color target, use a TemporaryRT
if (source == destination || (settings.srcType == settings.dstType && settings.srcType == Target.CameraColor)) {
cmd.GetTemporaryRT(m_TemporaryColorTexture.id, opaqueDesc, filterMode);
Blit(cmd, source, m_TemporaryColorTexture.Identifier(), blitMaterial, settings.blitMaterialPassIndex);
Blit(cmd, m_TemporaryColorTexture.Identifier(), destination);
} else {
Blit(cmd, source, destination, blitMaterial, settings.blitMaterialPassIndex);
}
context.ExecuteCommandBuffer(cmd);
CommandBufferPool.Release(cmd);
}
public override void FrameCleanup(CommandBuffer cmd) {
if (settings.dstType == Target.TextureID) {
cmd.ReleaseTemporaryRT(m_DestinationTexture.id);
}
if (source == destination || (settings.srcType == settings.dstType && settings.srcType == Target.CameraColor)) {
cmd.ReleaseTemporaryRT(m_TemporaryColorTexture.id);
}
}
}
[System.Serializable]
public class BlitSettings {
public RenderPassEvent Event = RenderPassEvent.AfterRenderingOpaques;
public Material blitMaterial = null;
public int blitMaterialPassIndex = 0;
public bool setInverseViewMatrix = false;
public bool requireDepthNormals = false;
public Target srcType = Target.CameraColor;
public string srcTextureId = "_CameraColorTexture";
public RenderTexture srcTextureObject;
public Target dstType = Target.CameraColor;
public string dstTextureId = "_BlitPassTexture";
public RenderTexture dstTextureObject;
public bool overrideGraphicsFormat = false;
public UnityEngine.Experimental.Rendering.GraphicsFormat graphicsFormat;
public bool canShowInSceneView = true;
}
public enum Target {
CameraColor,
TextureID,
RenderTextureObject
}
public BlitSettings settings = new BlitSettings();
public BlitPass blitPass;
public override void Create() {
var passIndex = settings.blitMaterial != null ? settings.blitMaterial.passCount - 1 : 1;
settings.blitMaterialPassIndex = Mathf.Clamp(settings.blitMaterialPassIndex, -1, passIndex);
blitPass = new BlitPass(settings.Event, settings, name);
#if !UNITY_2021_2_OR_NEWER
if (settings.Event == RenderPassEvent.AfterRenderingPostProcessing) {
Debug.LogWarning("Note that the \"After Rendering Post Processing\"'s Color target doesn't seem to work? (or might work, but doesn't contain the post processing) :( -- Use \"After Rendering\" instead!");
}
#endif
if (settings.graphicsFormat == UnityEngine.Experimental.Rendering.GraphicsFormat.None) {
settings.graphicsFormat = SystemInfo.GetGraphicsFormat(UnityEngine.Experimental.Rendering.DefaultFormat.LDR);
}
}
public override void AddRenderPasses(ScriptableRenderer renderer, ref RenderingData renderingData) {
if (renderingData.cameraData.isPreviewCamera) return;
if (!settings.canShowInSceneView && renderingData.cameraData.isSceneViewCamera) return;
if (settings.blitMaterial == null) {
Debug.LogWarningFormat("Missing Blit Material. {0} blit pass will not execute. Check for missing reference in the assigned renderer.", GetType().Name);
return;
}
#if !UNITY_2021_2_OR_NEWER
// AfterRenderingPostProcessing event is fixed in 2021.2+ so this workaround is no longer required
if (settings.Event == RenderPassEvent.AfterRenderingPostProcessing) {
} else if (settings.Event == RenderPassEvent.AfterRendering && renderingData.postProcessingEnabled) {
// If event is AfterRendering, and src/dst is using CameraColor, switch to _AfterPostProcessTexture instead.
if (settings.srcType == Target.CameraColor) {
settings.srcType = Target.TextureID;
settings.srcTextureId = "_AfterPostProcessTexture";
}
if (settings.dstType == Target.CameraColor) {
settings.dstType = Target.TextureID;
settings.dstTextureId = "_AfterPostProcessTexture";
}
} else {
// If src/dst is using _AfterPostProcessTexture, switch back to CameraColor
if (settings.srcType == Target.TextureID && settings.srcTextureId == "_AfterPostProcessTexture") {
settings.srcType = Target.CameraColor;
settings.srcTextureId = "";
}
if (settings.dstType == Target.TextureID && settings.dstTextureId == "_AfterPostProcessTexture") {
settings.dstType = Target.CameraColor;
settings.dstTextureId = "";
}
}
#endif
blitPass.Setup(renderer);
renderer.EnqueuePass(blitPass);
}
}
}
新增或空白阴影图Blank Shader Graph或者lit Shader Graph其实都可以
其实这一步跟前面类似,不过这里只是添加我们自己定义了URP配置脚本
配置材质
如果我们想要全屏效果,不希望它受处理效果的影响,您可以选择After Rendering Transparents(在渲染后处理效果后) ,但我们这里选择After Rendering Opaques (渲染不透明后),因为我希望它受到后处理效果影响
修改配置shader graph
连线参考和前面一样即可
不使用shader graph
当然如果你不想使用shader graph实现全屏效果也是可以的,可以参考我之前的文章:
【unity小技巧】受伤屏幕闪红、死亡动画、死亡黑屏效果
参考
https://www.bilibili.com/video/BV1gX4y1q72t/
https://www.youtube.com/watch?v=mCpRxFP2J1c
https://www.youtube.com/watch?v=hqz4TnvC3fQ
完结
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或者有更好的解决方法
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一位在小公司默默奋斗的开发者,闲暇之余,边学习边记录分享,站在巨人的肩膀上,通过学习前辈们的经验总是会给我很多帮助和启发!如果你遇到任何问题,也欢迎你评论私信找我, 虽然有些问题我也不一定会,但是我会查阅各方资料,争取给出最好的建议,希望可以帮助更多想学编程的人,共勉~
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