why am i get strange results with this shader

Unity Engine
1

i am testing a shader,
i know it can be done with

  • this.renderer.material.mainTexture.wrapMode = TextureWrapMode.Repeat;

but i wanted to try this an expand on it

this i my shader

{
    Properties
    {
        _Color("_Color", Color) = (1,1,1,1)
        _MainTex("_MainTex", 2D) = "white" {}
        _Vertical("_Vertical", float) = 0
        _Horizontal("_Horizontal", float) = 0 


    }
 
    SubShader
    {
        ZWrite Off
        Tags
        {
            "Queue"="Transparent"
            "IgnoreProjector"="False"
            "RenderType"="Transparent"
        }
     
        Pass
        {
            Blend SrcAlpha OneMinusSrcAlpha
            CGPROGRAM
                #pragma vertex vert
                #pragma fragment frag
 
                #include "UnityCG.cginc"
             
                float4 _Color;
                sampler2D _MainTex;
                float _Vertical;
                float _Horizontal;
             
                struct v2f
                {
                    float4 vertex : SV_POSITION;
                    float2 uv : TEXCOORD0;
                };
                     
               v2f vert(appdata_full v)
               {
                  v2f output;

                   output.vertex = mul(UNITY_MATRIX_MVP, v.vertex);
                   output.uv = v.texcoord;
                   output.uv = float4( v.texcoord.xy, 0, 0 );
                   output.uv.y -= _Vertical;
                   output.uv.x -= _Horizontal;
                   output.uv = frac(output.uv);
                                 
                   return output;
               }  
 
                float4 frag(v2f i) : COLOR
                {
                    float4 lColor = tex2D(_MainTex, i.uv)*_Color;
                    lColor.a *= _Color.a;
                    return lColor;
                }
            ENDCG
        }
    }
}

but with this i am getting some kind of reverse cramped image as well , and i dont know why,
any ideas ???

the idea is that i can wrap/ repeat when i move the image on the plane , not using TextureWrapMode.Repeat;

2136890--140842--zero.PNG

2

Please edit your post and put the code in [ CODE] [ /CODE] tags (without the spaces) and format/indent correctly - it’s just too difficult to read otherwise.

1 Like
3

thank you