Code:
Shader"Effect/RotateEffect"
{
Properties
{
_MainTex ("MainTex",2D) ="white"{}
_Rotate ("Rotation",float) =0
}
SubShader
{
Tags{"Queue"="Geometry"}
Pass
{
Tags{"LightMode"="ForwardBase"}
ZWriteOff
CGPROGRAM
#pragmavertexvert
#pragmafragmentfrag
#include"UnityCG.cginc"
#define PI3.14159265358979
sampler2D_MainTex;
float_Rot;
structa2v
{
float4vertex: POSITION;
float3texcoord:TEXCOORD0;
};
structv2f
{
float4pos : SV_POSITION;
float2uv :TEXCOORD0;
};
v2f vert (a2v v)
{
v2f o;
o.pos =mul(UNITY_MATRIX_MVP, v.vertex);
o.uv = v.texcoord;
returno;
}
fixed4frag (v2f i) : SV_Target
{
floatdistance=sqrt((i.uv.x -0.5)*(i.uv.x -0.5) +(i.uv.y -0.5)*(i.uv.y -0.5));
_Rot *=distance;
floatangle =step(i.uv.x,0.5)*PI+atan((i.uv.y -0.5)/(i.uv.x -0.5)) + _Rot;
i.uv.x =0.5+distance*cos(angle);
i.uv.y =0.5+distance*sin(angle);
fixed4c =tex2D(_MainTex, i.uv);
returnc;
}
ENDCG
}
}
FallBack"Default"
}
