Unity-Shader-边缘色

边缘着色。代码控制改变颜色和控制开关

先看代码

Shader 代码

Shader "Custom/bianyuancolor" 
{
	Properties
	{
		_MainTex("【文理】Texture" , 2D) = "white"{}
		_BumpMap("【凹凸文理】Bumpmap" , 2D) = "bump"{}
		_RimColor("【边缘颜色】Rim Color",Color) = (0.17, 0.36 , 0.81 ,0.0)
		_RimPower("【边缘颜色强度】Rim Power" , Range(0.6 , 9.0)) = 1.0
		_ShowRimColor("【是否显示边缘颜色】,Show Rim Color" , Int) = 1
	}

	SubShader
	{
		Tags{"RanderType"="Opaque"}
		CGPROGRAM

		#pragma surface surf Lambert

		struct Input
		{
			float2 uv_MainTex;
			float2 uv_BumpMap;
			float3 viewDir; //观察方向

		};

		sampler2D _MainTex;
		sampler2D _BumpMap;
		float4 _RimColor;
		float _RimPower;
		int _ShowRimColor;

		void surf(Input IN , inout SurfaceOutput o)
		{
			//2D 文理查询
			o.Albedo = tex2D(_MainTex , IN.uv_MainTex).rgb;

			o.Normal = UnpackNormal(tex2D(_BumpMap , IN.uv_BumpMap));
			half rim = 1.0 - saturate(dot(normalize(IN.viewDir) , o.Normal));
			if(_ShowRimColor == 1)
				o.Emission = _RimColor.rgb * pow(rim , _RimPower);
		}
		ENDCG
	}

	Fallback "Diffuse"
}

saturate函数（saturate(x)的作用是如果x取值小于0，则返回值为0。如果x取值大于1，则返回值为1。若x在0到1之间，则直接返回x的值

C# 代码

void Update()
  {
      if (Input.GetKeyDown(KeyCode.K)) {
          obj.GetComponent<MeshRenderer>().material.SetInt("_ShowRimColor", 0);
      }
      if (Input.GetKeyUp(KeyCode.K))
      {
          obj.GetComponent<MeshRenderer>().material.SetInt("_ShowRimColor", 1);
      }
      if (Input.GetKeyDown(KeyCode.R))
      {
          obj.GetComponent<MeshRenderer>().material.SetColor("_RimColor", Color.red);
      }
      if (Input.GetKeyDown(KeyCode.Y))
      {
          obj.GetComponent<MeshRenderer>().material.SetColor("_RimColor", Color.yellow);
      }
      if (Input.GetKeyDown(KeyCode.B))
      {
          obj.GetComponent<MeshRenderer>().material.SetColor("_RimColor", Color.blue);
      }
      if (Input.GetKeyDown(KeyCode.G))
      {
          obj.GetComponent<MeshRenderer>().material.SetColor("_RimColor", Color.green);
      }
  }

先看一下关闭打开效果图

代码控制颜色