u3d xray效果

淡淡的烟草味﹌ 2022-06-17 07:50 255阅读 0赞

类似图中效果  
![这里写图片描述][6c10924999f19185aa42e6c318c328fc.png]  
plane屏幕扫过的部分可以看到球体中的内部结构，相当于透视眼，球体的其他部分正常  
球和球体中的物体加shader

// Upgrade NOTE: replaced '_Object2World' with 'unity_ObjectToWorld'
    // Upgrade NOTE: replaced 'mul(UNITY_MATRIX_MVP,*)' with 'UnityObjectToClipPos(*)'
    
    Shader "Custom/XRayShader"
    {
    	Properties
    	{
    		_MainTex("Texture", 2D) = "white" {}
    	_RayColor("RayColor", COLOR) = (0,0,1,0)
    	}
    		SubShader
    	{
    		Pass
    	{
    		Name "BASE1"
    		Tags{ "RenderType" = "Transparent" "Queue" = "Transparent" }
    		Blend One OneMinusSrcAlpha
    		Cull Back
    		ZTest Greater
    		ZWrite Off
    
    		CGPROGRAM
    #pragma vertex vert
    #pragma fragment frag
    		// make fog work
    #pragma multi_compile_fog
    
    #include "UnityCG.cginc"
    #include "Lighting.cginc"
    
    		struct appdata
    	{
    		float4 vertex : POSITION;
    		float2 uv : TEXCOORD0;
    		float4 normal : NORMAL;
    	};
    
    	struct v2f
    	{
    		UNITY_FOG_COORDS(0)
    			float4 vertex : SV_POSITION;
    		float2 uv : TEXCOORD1;
    		float4 diff : TEXCOORD2;
    	};
    
    	v2f vert(appdata v)
    	{
    		v2f o;
    		o.vertex = UnityObjectToClipPos(v.vertex);
    		o.uv = v.uv;
    
    		float3 worldNormal = normalize(mul(unity_ObjectToWorld, float4(v.normal.xyz,0)).xyz) * -1; //将法线转换到世界空间， * -1 是为了有外轮廓的效果，因此将法线翻转
    		float3 viewDirection = normalize(_WorldSpaceCameraPos); //将视野也转到相同的世界空间
    		o.diff = max(0, dot(viewDirection, worldNormal)); //计算视野和法线的夹角 将垂直的部分不填色
    
    		return o;
    	}
    
    	uniform float4 _RayColor;
    
    	fixed4 frag(v2f i) : SV_Target
    	{
    		_RayColor *= i.diff.x;
    	return _RayColor;
    	}
    		ENDCG
    	}
    
    		Pass
    	{
    		Name "BASE2"
    		Tags{ "RenderType" = "Opaque" }
    		ZWrite On
    		ZTest LEqual
    
    
    		CGPROGRAM
    #pragma vertex vert
    #pragma fragment frag
    		// make fog work
    #pragma multi_compile_fog
    
    #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;
    
    	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);
    	return col;
    	}
    		ENDCG
    	}
    
    	}
    }

[6c10924999f19185aa42e6c318c328fc.png]: /images/20220617/cf690837e6b945eea557c65c6bb0d9c9.png