一、效果示意图
二、透视的过程
要看的效果：【相机】借助【球体】，透过【圆柱】看到【红色的方块】
三、实现原理-Shader
借助shader，两个挂有特殊shader的物体，当他们在视线里重叠的时候，重叠的部分变成透明。
shder清单见附录部分
（1）透镜的shader设置
（2）障碍物的shader设置
四、附录-shader清单
（1）透镜挂在的shader
Shader "Custom/MaskShader4"
{Properties{_MainTex ("Texture", 2D) = "white" {}_Color ("Color", Color) = (1,1,1,1) // 添加颜色属性}SubShader{Tags { "RenderType"="Opaque" "Queue"="Geometry-1" }ColorMask 0ZWrite OffStencil{Ref 1Comp AlwaysPass Replace}CGPROGRAM#pragma surface surf Lambert alphasampler2D _MainTex;fixed4 _Color; // 声明颜色变量struct Input{float2 uv_MainTex;};void surf (Input IN, inout SurfaceOutput o){fixed4 c = tex2D (_MainTex, IN.uv_MainTex) * _Color; // 应用颜色o.Albedo = c.rgb;o.Alpha = c.a;}ENDCG}FallBack "Diffuse"
}
（2）障碍物挂在的shader
Shader "Custom/MaskedObjectShader4"
{Properties{_MainTex ("Texture", 2D) = "white" {}_Color ("Color", Color) = (1,1,1,1) // 添加颜色属性}SubShader{Tags { "RenderType"="Opaque" "Queue"="Geometry" }Stencil{Ref 1Comp NotEqualPass Keep}CGPROGRAM#pragma surface surf Lambertsampler2D _MainTex;fixed4 _Color; // 声明颜色变量struct Input{float2 uv_MainTex;};void surf (Input IN, inout SurfaceOutput o){fixed4 c = tex2D (_MainTex, IN.uv_MainTex) * _Color; // 应用颜色o.Albedo = c.rgb;o.Alpha = c.a;}ENDCG}FallBack "Diffuse"
}
五、鸣谢
感谢chatGpt公公和Claude婆婆的慷慨大方
