Referenced[Daily development of Unity3D] The effect of arrow pointing to the target point in Unity3D_51CTO blog_unity looks at the target pointThis article The article created the scene, but when using this drawing directly, there will be a problem of paths overlapping and being covered when turning the camera
I asked my colleague to slightly modify the shader: the code is as follows
Shader "Custom/PathShader"
{
Properties
{
_MainTex("Texture", 2D) = "white" {}
_ScrollYSpeed("Y Scroll Speed", Range(-20, 20)) = 2
}
SubShader
{
Tags { "Queue" = "AlphaTest" "RenderType" = "AlphaTest" }
LOD 100
//双面渲染
Cull Back
//ZWrite On
//Alpha混合
//Blend SrcAlpha OneMinusSrcAlpha
Pass
{
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
#include "UnityCG.cginc"
struct appdata
{
float4 vertex : POSITION;
float2 uv : TEXCOORD0;
};
struct v2f
{
float2 uv : TEXCOORD0;
float4 vertex : SV_POSITION;
};
sampler2D _MainTex;
float4 _MainTex_ST;
fixed _ScrollYSpeed;
v2f vert(appdata v)
{
v2f o;
o.vertex = UnityObjectToClipPos(v.vertex);
o.uv = TRANSFORM_TEX(v.uv, _MainTex);
return o;
}
fixed4 frag(v2f i) : SV_Target
{
fixed2 uv = i.uv;
uv.y += _ScrollYSpeed * _Time;
fixed4 col = tex2D(_MainTex, uv);
clip(col.w-0.1 );
return fixed4(col.xyz,1);
}
ENDCG
}
}
}
The effect is as follows:
However, there are problems such as model cropping and discoloration. It depends on the situation.