【Unity】Shader编辑器扩展_vs中unity shader编程扩展

目录

一、Shader编辑器扩展——简单介绍

1.1、利用ShaderGUI派生类来重新绘制Shader的Inspector窗口

1.2、利用MaterialPropertyDrawers，即加标签形式扩展

二、介绍Shader编辑器扩展的标签形式——方便好用

一、Shader编辑器扩展——简单介绍

1.1、利用ShaderGUI派生类来重新绘制Shader的Inspector窗口

Shader "Unlit/BaseUnityShader"
{
	Properties
	{
		_MainTex("Texture", 2D) = "white" {}
	//[Toggle(REDIFY_ON)] _Redify("Red?", Int) = 0
	}
	SubShader
	{
		Tags { "RenderType" = "Opaque" }
		LOD 200
 
		CGPROGRAM
		#pragma surface surf Lambert addshadow
		#pragma shader_feature REDIFY_ON
		sampler2D _MainTex;
		struct Input {
			float2 uv_MainTex;
		};
		void surf(Input IN, inout SurfaceOutput o)
		{
			half4 c = tex2D(_MainTex, IN.uv_MainTex);
			o.Albedo = c.rgb;
			o.Alpha = c.a;
 
	#if REDIFY_ON 
			o.Albedo.gb *= 0.5;
	#endif
		}
		ENDCG
	}
	CustomEditor "UnityShaderEditorUI" //指向继承于ShaderGUI的类，进行编辑Shader的Inspector窗口
}

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEditor;
using System;
 
public class UnityShaderEditorUI : ShaderGUI
{
    static string KEY = "REDIFY_ON";
    public override void OnGUI(MaterialEditor materialEditor, MaterialProperty[] properties)
    {
        base.OnGUI(materialEditor, properties);
 
        Material targetMat = materialEditor.target as Material;
 
        bool redify = Array.IndexOf(targetMat.shaderKeywords, KEY) != -1;
        EditorGUI.BeginChangeCheck();
        redify = EditorGUILayout.Toggle("Redify material", redify);
        if (EditorGUI.EndChangeCheck())
        {
            if (redify)
            {
                targetMat.EnableKeyword(KEY);
            }
            else
            {
                targetMat.DisableKeyword(KEY);
            }
        }
    }
}

1.2、利用MaterialPropertyDrawers，即加标签形式扩展

Shader "Unlit/BaseUnityShader"
{
	Properties
	{
		_MainTex("Texture", 2D) = "white" {}
                //Toggle标签，REDIFY_ON是Shader变体，设置该属性会直接赋值到变体上（控制开关）
		[Toggle(REDIFY_ON)] _Redify("Red?", Int) = 0
	}
	SubShader
	{
		Tags { "RenderType" = "Opaque" }
		LOD 200
 
		CGPROGRAM
		#pragma surface surf Lambert addshadow
                //Shader变体 REDIFY_ON
		#pragma shader_feature REDIFY_ON
		sampler2D _MainTex;
		struct Input {
			float2 uv_MainTex;
		};
		void surf(Input IN, inout SurfaceOutput o)
		{
			half4 c = tex2D(_MainTex, IN.uv_MainTex);
			o.Albedo = c.rgb;
			o.Alpha = c.a;
 
	#if REDIFY_ON 
			o.Albedo.gb *= 0.5;
	#endif
		}
		ENDCG
	}
	//CustomEditor "UnityShaderEditorUI" //指向继承于ShaderGUI的类，进行编辑Shader的Inspector窗口
}

二、介绍Shader编辑器扩展的标签形式——方便好用

Shader "Unlit/DrawerUnityShader"
{
	Properties
	{
		_MainTex ("Texture", 2D) = "white" {}
		//Toggle
		[Toggle] _Toggle("Tog?", Float) = 0
		[Toggle(ENABLE_FANCY)] _Fancy("Fancy", Float) = 0
 
		[Enum(UnityEngine.ShaderMilk.ShaderEnum)] _ShaderEnum("ShaderEnum", Float) = 1
		[Enum(Apple, 1, Banana, 2)] _Flood("Flood", Float) = 1
 
		//三个变种key名称为：属性名+_+枚举名（全大写) 如:_OVERLAY_NONE
		[KeywordEnum(None, Add, Multiply)] _Overlay("Overlay", Float) = 0//疑问：如何不选择任意一个变体 为空
 
		//非线性滑动条
		[PowerSlider(3.0)] _Shininess("Shininess", Range(0.01, 1)) = 0.08
 
		[IntRange] _Alpha ("Alpha", Range(0, 255)) = 100
 
		[Space] _Prop1 ("Prop1", Float) = 0
		[Space(50)] _Prop2 ("Prop2", Float) = 0
 
		[Header(Test)] _Header1("Header1" , Float) = 0
	}
	SubShader
	{
		Tags { "RenderType"="Opaque" }
		LOD 100
 
		Pass
		{
			CGPROGRAM
			#pragma vertex vert
			#pragma fragment frag
			// make fog work
			#pragma multi_compile_fog
			#pragma multi_compile _OVERLAY_NONE _OVERLAY_ADD _OVERLAY_MULTIPLY
			#pragma multi_compile _ ENABLE_FANCY
			//#pragma shader_feature ENABLE_FANCY
			
			#include "UnityCG.cginc"
 
			struct appdata
			{
				float4 vertex : POSITION;
				float2 uv : TEXCOORD0;
			};
 
			struct v2f
			{
				float2 uv : TEXCOORD0;
				UNITY_FOG_COORDS(1)
				float4 vertex : SV_POSITION;
			};
 
			sampler2D _MainTex;
			float4 _MainTex_ST;
			float _ShaderEnum;
			
			v2f vert (appdata v)
			{
				v2f o;
				o.vertex = UnityObjectToClipPos(v.vertex);
				o.uv = TRANSFORM_TEX(v.uv, _MainTex);
				UNITY_TRANSFER_FOG(o,o.vertex);
				return o;
			}
			
			fixed4 frag (v2f i) : SV_Target
			{
				// sample the texture
				fixed4 col = tex2D(_MainTex, i.uv);
				// apply fog
				UNITY_APPLY_FOG(i.fogCoord, col);
				if (_ShaderEnum == 1) {
					col = fixed4(1, 0, 0, 1);
				}else if (_ShaderEnum == 4) {
					col = fixed4(0, 1, 0, 1);
				}
#if _OVERLAY_NONE 
				col = fixed4(1, 1, 0, 1);
#elif _OVERLAY_ADD
				col = fixed4(1, 0, 1, 1);
#elif _OVERLAY_MULTIPLY
				col = fixed4(1, 0.5, 1, 1);
#else
				col = fixed4(0, 0, 0, 1);
#endif
				
				return col;
			}
			ENDCG
		}
	}
}

 更多知识可参考Unity官方手册Custom Shader GUI、MaterialPropertyDrawers等