1#version 120
2const int KernelSize = 16;
3uniform float KernelValue1f[KernelSize];
4
5
6float add_two(float a, float b)
7{
8    if (a > b)
9        return a - b;
10    else
11        return a + b;
12}
13
14vec4 myfunc(vec4 x, vec4 mult, vec4 c)
15{
16   if (x.x >= 0.5) {
17      return mult * c;
18   } else {
19      return mult + c;
20   }
21}
22
23vec4 func2(vec4 x)
24{
25    int i;
26    vec4 color = vec4(0);
27       for (i = 0; i < KernelSize; ++i) {
28           vec4 tmp = vec4(1./KernelSize);
29           color += myfunc(x, tmp, gl_Color);
30       }
31    return x * color;
32}
33
34vec4 func(vec4 x)
35{
36    int i;
37    vec4 tmp = gl_Color;
38    vec4 sum = x;
39
40    for (i = 0; i < KernelSize; ++i) {
41        sum = vec4( add_two(sum.x, KernelValue1f[i]) );
42    }
43    sum = func2(sum);
44    return sum;
45}
46
47void main(void)
48{
49    vec4 sum = vec4(0.0);
50
51    sum = func(sum);
52    gl_Position = gl_Vertex;
53    gl_FrontColor = sum;
54}
55