模糊背景shader

最新推荐文章于 2023-12-21 13:37:03 发布

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最新推荐文章于 2023-12-21 13:37:03 发布 · 779 阅读

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CC 4.0 BY-SA版权

本文详细探讨了如何使用Shader技术创建模糊背景效果，从理论到实践，解释了关键的数学原理和图形学概念，包括高斯模糊、径向模糊等方法，并提供了实际代码示例，帮助开发者理解并应用于自己的项目。

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Shader "Custom/SimpleGrabPassBlur" {
	Properties{
		_Color("Main Color", Color) = (1,1,1,1)
		_BumpAmt("Distortion", Range(0,128)) = 10
		_MainTex("Tint Color (RGB)", 2D) = "white" {}
		_BumpMap("Normalmap", 2D) = "bump" {}
		_Size("Size", Range(0, 200)) = 1
	}

		Category{

		// We must be transparent, so other objects are drawn before this one.
		Tags{ "Queue" = "Transparent" "IgnoreProjector" = "True" "RenderType" = "Opaque" }


		SubShader{

		// Horizontal blur
		GrabPass{
		Tags{ "LightMode" = "Always" }
	}
		Pass{
		Tags{ "LightMode" = "Always" }

		CGPROGRAM
#pragma vertex vert
#pragma fragment frag
#pragma fragmentoption ARB_precision_hint_fastest
#include "UnityCG.cginc"

		struct appdata_t {
		float4 vertex : POSITION;
		float2 texcoord: TEXCOORD0;
	};

	struct v2f {
		float4 vertex : POSITION;
		float4 uvgrab : TEXCOORD0;
	};

	v2f vert(appdata_t v) {
		v2f o;
		o.vertex = mul(UNITY_MATRIX_MVP, v.vertex);
#if UNITY_UV_STARTS_AT_TOP
		float scale = -1.