90 lines
1.7 KiB
GLSL
90 lines
1.7 KiB
GLSL
Shader "Custom/Oil Paint" {
|
|
Properties
|
|
{
|
|
_MainTex("Texture", 2D) = "white" {}
|
|
_Radius ("Range", Range(0, 10)) = 5
|
|
}
|
|
SubShader
|
|
{
|
|
Pass
|
|
{
|
|
CGPROGRAM
|
|
#pragma vertex vertex_shader
|
|
#pragma fragment pixel_shader
|
|
|
|
sampler2D _MainTex;
|
|
float4 _MainTex_TexelSize;
|
|
int _Radius;
|
|
|
|
struct structure
|
|
{
|
|
float4 vertex:SV_POSITION;
|
|
float2 uv : TEXCOORD0;
|
|
};
|
|
|
|
structure vertex_shader(float4 vertex:POSITION,float2 uv:TEXCOORD0)
|
|
{
|
|
structure vs;
|
|
vs.vertex = UnityObjectToClipPos(vertex);
|
|
vs.uv = uv;
|
|
return vs;
|
|
}
|
|
|
|
struct region
|
|
{
|
|
int x1, y1, x2, y2;
|
|
};
|
|
|
|
float4 pixel_shader(structure ps) : SV_Target
|
|
{
|
|
float2 uv = ps.uv;
|
|
float n = float((_Radius + 1) * (_Radius + 1));
|
|
float4 color = tex2D(_MainTex, uv);
|
|
float3 m[4];
|
|
float3 s[4];
|
|
|
|
int k;
|
|
|
|
for (k = 0; k < 4; ++k)
|
|
{
|
|
m[k] = float3(0, 0, 0);
|
|
s[k] = float3(0, 0, 0);
|
|
}
|
|
region R[4] =
|
|
{
|
|
{-_Radius, -_Radius, 0, 0},
|
|
{ 0, -_Radius, _Radius, 0},
|
|
{ 0, 0, _Radius, _Radius},
|
|
{-_Radius, 0, 0, _Radius}
|
|
};
|
|
for (k = 0; k < 4; ++k)
|
|
{
|
|
for (int j = R[k].y1; j <= R[k].y2; ++j)
|
|
{
|
|
for (int i = R[k].x1; i <= R[k].x2; ++i)
|
|
{
|
|
float3 c = tex2Dlod(_MainTex,float4(uv+(float2(i*_MainTex_TexelSize.x,j*_MainTex_TexelSize.y)),0,0)).rgb;
|
|
m[k] += c;
|
|
s[k] += c * c;
|
|
}
|
|
}
|
|
}
|
|
float min = 1e+2;
|
|
float s2;
|
|
for (k = 0; k < 4; ++k)
|
|
{
|
|
m[k] /= n;
|
|
s[k] = abs(s[k] / n - m[k] * m[k]);
|
|
s2 = s[k].r + s[k].g + s[k].b;
|
|
if (s2 < min)
|
|
{
|
|
min = s2;
|
|
color.rgb = m[k].rgb;
|
|
}
|
|
}
|
|
return color;
|
|
}
|
|
ENDCG
|
|
}
|
|
}
|
|
} |