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typedef float2 vec2;
typedef float3 vec3;
typedef float4 vec4;
#define sin native_sin
#define cos native_cos
#define tan native_tan
#define normalize fast_normalize
#define length fast_length
#define mod fmod
#define time 10.f
inline vec3 reflect(vec3 I, vec3 N) {
return I - 2.0f * dot(N, I) * N;
}
inline uint pack_fp4(float4 u4) {
uint u;
u = (((uint) u4.x)) |
(((uint) u4.y) << 8) |
(((uint) u4.z) << 16);
return u;
}
#define OUTPUT do {\
const vec4 final = 255.f * max(min(gl_FragColor, (vec4)(1.f)), (vec4)(0.f)); \
dst[get_global_id(0) + get_global_id(1) * w] = pack_fp4(final); \
} while (0)
__kernel void compiler_chocolux(__global uint *dst, float resx, float resy, int w)
{
vec2 gl_FragCoord = (vec2)(get_global_id(0), get_global_id(1));
vec3 s[4];
s[0]=(vec3)(0);
s[3]=(vec3)(sin(time),cos(time),0);
s[1]=s[3].zxy;
s[2]=s[3].zzx;
float t,b,c,h=0.0f;
vec3 m,n;
vec3 p=(vec3)(.2f);
vec3 d=normalize(.001f*(vec3)(gl_FragCoord,.0f)-p);
for(int i=0;i<4;i++)
{
t=2.0f;
for(int i=0;i<4;i++)
{
b=dot(d,n=s[i]-p);
c=b*b+.2f-dot(n,n);
if(b-c<t)
if(c>0.0f)
{
m=s[i];t=b-c;
}
}
p+=t*d;
d=reflect(d,n=normalize(p-m));
h+=pow(n.x*n.x,44.f)+n.x*n.x*.2f;
}
vec4 gl_FragColor=(vec4)(h,h*h,h*h*h*h,1.f);
OUTPUT;
}
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