trail_customized_quest.shader

/*
 Original file :
 Storage for distribution - Lyuma
 https://gist.github.com/lyuma
 rounded_trail for quest
 LICENSE : CC0
*/

// 2019-09-30 customized for quest.

Shader "Unlit/trail_customized_quest"
{
	Properties
	{
		_Color ("Solid Color", Color) = (1,1,1,1)
		_InvisibleDistance ("Invisible Distance from Camera", Float) = 500.0
	}
	SubShader
	{
		Tags { "Queue"="AlphaTest" "RenderType"="Opaque" }
		LOD 100
		Cull Back
		Blend One Zero
		ZWrite On

		Pass
		{
			CGPROGRAM
			#pragma vertex vert
			#pragma fragment frag
			#pragma multi_compile_fog
			#pragma target 3.0
			
			#include "UnityCG.cginc"

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

			struct v2f
			{
				float4 vertex : SV_POSITION;
				float2 uv : TEXCOORD0;
			};

			sampler2D _MainTex;
			float4 _Color;
			float _InvisibleDistance;

			#ifdef USING_STEREO_MATRICES
			static float3 centerEyePos = 0.5 * (unity_StereoWorldSpaceCameraPos[0] +  unity_StereoWorldSpaceCameraPos[1]);
			#else
			static float3 centerEyePos = _WorldSpaceCameraPos;
			#endif

			v2f vert (appdata v)
			{
				v2f o;
				o.vertex = UnityObjectToClipPos(v.vertex);
				if (distance(mul(unity_ObjectToWorld, v.vertex).xyz, centerEyePos.xyz) > _InvisibleDistance) {
					o.vertex = 0./0.;
				}
				o.uv = v.uv;
				return o;
			}
			
			fixed4 frag (v2f i) : SV_Target
			{
				float l = length(i.uv);
				return float4(_Color.xyz,1);
			}
			ENDCG
		}
	}
}