Unity Shader 闪烁的光晕 Glow 亮瞎你的眼

效果图 :

Shader006.shader

Shader "Custom/Shader006" {

	Properties {
		_Color ("Color", Color) = (1,0.6,0,1)
		_GlowColor("Glow Color", Color) = (1,1,0,1)
		_Strength("Glow Strength", Range(5.0, 1.0)) = 2.0
		_GlowRange("Glow Range", Range(0.1,1)) = 0.6
		// _MainTex ("Albedo (RGB)", 2D) = "white" {}
		// _Glossiness ("Smoothness", Range(0,1)) = 0.5
		// _Metallic ("Metallic", Range(0,1)) = 0.0
	}

	SubShader {

		Pass {
			Tags { "LightMode"="ForwardBase" }

			CGPROGRAM

			#pragma vertex vert
			#pragma fragment frag

			float4 _Color;

			float4 vert(float4 vertexPos : POSITION) : SV_POSITION {
				return mul(UNITY_MATRIX_MVP, vertexPos);
			}

			float4 frag(void) : COLOR {
				return _Color;
			}

			ENDCG
		}

		Pass {
			Tags { "LightMode"="ForwardBase" "Queue"="Transparent" "RenderType"="Transparent" }
			// Cull Front
			ZWrite Off
			Blend SrcAlpha OneMinusSrcAlpha

			CGPROGRAM

			#pragma vertex vert
			#pragma fragment frag
			#include "UnityCG.cginc"

			float4 _GlowColor;
			float _Strength;
			float _GlowRange;

			struct a2v {
				float4 vertex : POSITION;
				float4 normal : NORMAL;
			};

			struct v2f {
				float4 position : SV_POSITION;
				float4 col : COLOR;
			};

			v2f vert(a2v a) {
				v2f o;
				float4x4 modelMatrix = unity_ObjectToWorld;
				float4x4 modelMatrixInverse = unity_WorldToObject;
				float3 normalDirection = normalize(mul(a.normal, modelMatrixInverse)).xyz;
				float3 viewDirection = normalize(_WorldSpaceCameraPos - mul(modelMatrix, a.vertex).xyz);
				float4 pos = a.vertex + (a.normal * _GlowRange);
				o.position = mul(UNITY_MATRIX_MVP, pos);
				float3 normalDirectionT = normalize(normalDirection);
				float3 viewDirectionT = normalize(viewDirection);
				float strength = abs(dot(viewDirectionT, normalDirectionT));
				float opacity = pow(strength, _Strength);
				float4 col = float4(_GlowColor.xyz, opacity);
				o.col = col;
				return o;
			}

			float4 frag(v2f i) : COLOR {
				return i.col;
			}

			ENDCG
		}

	}
	FallBack "Diffuse"
}

ScriptShader006.cs

using UnityEngine;
using System.Collections;

public class ScriptShader006 : MonoBehaviour
{

	private Material mat;
	private float value;
	float speed = 2.5f;

	void Start ()
	{
		mat = GetComponent<MeshRenderer> ().sharedMaterial;
	}

	void Update ()
	{
		value = Mathf.PingPong (Time.time * speed, 5);
		mat.SetFloat ("_Strength", value);
		Debug.Log (value);
	}
}

End.

→ 源码 GitHub