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unity-shader-example-sceneDisplay

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SceneDisplay.shader

SceneDisplay.shader
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Shader "HHF/Example/SceneDisplay"
{
    Properties
    {
        _MainTex ("MainTex", 2D) = "white" {}
        _FadeRange("FadeRange", Float) = 2
        _OutlineColor("OutlineColor", Color) = (0,0.7479331,1,0)
    }
    
    SubShader 
    {
        Tags
        {
            "RenderPipeline"="UniversalPipeline"
            "RenderType"="Opaque"
        }

        Pass
        {
            HLSLPROGRAM
            #pragma prefer_hlslcc gles
            #pragma exclude_renderers d3d11_9x
            #pragma multi_compile _ DISAPPEARENABLED_ON
            #pragma vertex vert
            #pragma fragment frag
            
            #include "Packages/com.unity.render-pipelines.core/ShaderLibrary/Color.hlsl"
            #include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Core.hlsl"

            struct appdata
            {
                float4 vertex:POSITION;
                float2 uv:TEXCOORD0;
                float3 normal:NORMAL;
            };

            struct v2f 
            {
                float2 uv : TEXCOORD0;
                float4 positionCS:SV_POSITION;
                float3 positionWS : TEXCOORD2;
            };

            CBUFFER_START(UnityPerMaterial)
            float4 _MainTex_ST;
            float _FadeRange;
            float4 _OutlineColor;
            float3 _FadeStartPos;
            float _Radius;
            CBUFFER_END

            TEXTURE2D (_MainTex);SAMPLER(sampler_MainTex);

            v2f vert (appdata v) 
            {
                v2f o = (v2f)0;

                o.positionWS = TransformObjectToWorld(v.vertex.xyz);
                o.positionCS = TransformWorldToHClip(o.positionWS);
                o.uv = TRANSFORM_TEX(v.uv, _MainTex);
                return o;
            }

            half4 frag (v2f i) : SV_Target 
            {
                half4 c = 0;

                // 主纹理
                half4 mainTex = SAMPLE_TEXTURE2D(_MainTex, sampler_MainTex, i.uv);
                c = mainTex;

                #ifdef DISAPPEARENABLED_ON
                    // 显示处理
                    float fadeMin = _Radius - _FadeRange;
                    float fadeMax = _Radius;
                    // saturate((x - min)/(max - min))
                    // float fade = smoothstep( fadeMin , fadeMax , distance( startPos , i.worldPos));
                    float fade = saturate((distance( _FadeStartPos , i.positionWS) - fadeMin)/(fadeMax-fadeMin));
                
                    clip( 0.999 - fade);
                    c +=  fade * _OutlineColor ;
                #endif

                return c;
            }

            ENDHLSL
        }   
    }

    SubShader
    {
        Tags{ "RenderType" = "Opaque"  "Queue" = "Geometry"  }
        
        Pass 
        {
            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag
            #pragma multi_compile _ DISAPPEARENABLED_ON
            #include "UnityCG.cginc"

            struct appdata
            {
                float4 vertex:POSITION;
                float2 uv:TEXCOORD0;
                float3 normal:NORMAL;
            };

            struct v2f 
            {
                float2 uv : TEXCOORD0;
                float4 positionCS:SV_POSITION;
                float3 positionWS : TEXCOORD2;
            };

            sampler2D _MainTex;
            float4 _MainTex_ST;
            float _FadeRange;
            float4 _OutlineColor;

            float3 _FadeStartPos;
            float _Radius;

            v2f vert (appdata v) 
            {
                v2f o = (v2f)0;
                
                o.positionCS = UnityObjectToClipPos(v.vertex);
                o.positionWS.xyz = mul(unity_ObjectToWorld, v.vertex).xyz;
                o.uv = TRANSFORM_TEX(v.uv, _MainTex);
                return o;
            }

            half4 frag (v2f i) : SV_Target 
            {
                half4 c = 0;

                // 主纹理
                half4 mainTex = tex2D(_MainTex, i.uv);
                c = mainTex;

                #ifdef DISAPPEARENABLED_ON
                    // 显示处理
                    float fadeMin = _Radius - _FadeRange;
                    float fadeMax = _Radius;
                    // saturate((x - min)/(max - min))
                    // float fade = smoothstep( fadeMin , fadeMax , distance( startPos , i.worldPos));
                    float fade = saturate((distance( _FadeStartPos , i.positionWS) - fadeMin)/(fadeMax-fadeMin));
                
                    clip( 0.999 - fade);
                    c +=  fade * _OutlineColor ;
                #endif

                return c;
            }

            ENDCG

        }

    }
}

SceneDisplayController.cs

SceneDisplayController.cs
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using UnityEngine;

public class SceneDisplayController : MonoBehaviour
{
    public Vector3 FadeStartPos;
    public float Range;
    public bool EnableKey;

    void Update()
    {
        if (EnableKey)
        {
            Shader.EnableKeyword("DISAPPEARENABLED_ON");
        }
        else
        {
            Shader.DisableKeyword("DISAPPEARENABLED_ON");
        }
        
        Shader.SetGlobalVector("_FadeStartPos", FadeStartPos);
        Shader.SetGlobalFloat("_Radius", Range);
    }
}