Shader之ShaderUI使用方法

shader中的宏定义在material中Inspector中打开

Shader "Custom/Redify" {
	Properties{
		_MainTex("Base (RGB)", 2D) = "white" {}
	}
		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//可通过Materal中的Inspetcor面板打开
		o.Albedo.gb *= 0.5;
#endif
	}
	ENDCG
	}
		CustomEditor "CustomShaderGUI"
}

　　

using UnityEngine;
using UnityEditor;
using System;

public class CustomShaderGUI : ShaderGUI
{
    public override void OnGUI(MaterialEditor materialEditor, MaterialProperty[] properties)
    {
        // render the default gui
        base.OnGUI(materialEditor, properties);

        Material targetMat = materialEditor.target as Material;

        // see if redify is set, and show a checkbox
        bool redify = Array.IndexOf(targetMat.shaderKeywords, "REDIFY_ON") != -1;
        EditorGUI.BeginChangeCheck();
        redify = EditorGUILayout.Toggle("Redify material", redify);
        if (EditorGUI.EndChangeCheck())
        {
            // enable or disable the keyword based on checkbox
            if (redify)
                targetMat.EnableKeyword("REDIFY_ON");
            else
                targetMat.DisableKeyword("REDIFY_ON");
        }
    }
}