Unity3D Shader 按百分比裁剪模型

  

Shader

Shader "Unlit/Disappear"
{
    Properties
    {
        _MainTex ("Texture", 2D) = "white" {}
        _Color("Color",Color) = (1,1,1,1)
        _Height("Height",Float) = 0.5
        _ColorRange("Color Range",Float) = 1
    }

    SubShader
    {
        Tags { "RenderType"="Opaque" }
        LOD 100
		Cull Off
        Pass
        {
            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;

                float4 vertex : SV_POSITION;
                float height:TEXCOORD1;
            };

            sampler2D _MainTex;
            float4 _MainTex_ST;
            float4 _Color;
            float _ColorRange;
            float _Height;

            v2f vert (appdata v)
            {
                v2f o;
                o.vertex = mul(UNITY_MATRIX_MVP, v.vertex);
                o.uv = TRANSFORM_TEX(v.uv, _MainTex);

				o.height = v.vertex.y; 

                return o;
            }

            fixed4 frag (v2f i) : SV_Target
            {
                fixed4 col = tex2D(_MainTex, i.uv);

				clip(_Height-i.height);
                float fac = sign(saturate(_Height-_ColorRange-i.height));

				col.rgb = (1-fac)*_Color+col.rgb*fac;

                return col;
            }
            ENDCG
        }
    }
}