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unsigned int secant_fractal(double x, double y, unsigned int escape, unsigned int iterations) {
for(unsigned int iter = 0; iter < iterations; iter++) {
double next_x;
next_x = x / cos(y);
y = y / cos(x);
x = next_x;
if((pow(x, 2) + pow(y, 2)) >= escape) return iter;
}
}
unsigned int cosecant_fractal(double x, double y, unsigned int escape, unsigned int iterations) {
for(unsigned int iter = 0; iter < iterations; iter++) {
double next_x;
next_x = x / sin(y);
y = y / sin(x);
x = next_x;
if((pow(x, 2) + pow(y, 2)) >= escape) return iter;
}
}
double cosecant_single(double a, double b) { return a / sin(b); }
double secant_single(double a, double b) { return a / tan(b); }
__kernel void render_frame(__global unsigned int *frame_output, __global double *mask,
double x_step, double y_step,
double x_start, double y_start,
unsigned int iterations, unsigned int escape, double ratio) {
unsigned int result;
double x = (get_global_id(0) * x_step) + x_start;
double y = (get_global_id(1) * y_step) + y_start;
size_t img_index = (get_global_id(1) * get_global_size(1)) + get_global_id(0);
unsigned int iter;
for(iter = 0; iter < iterations; iter++) {
double next_x;
double r = mask[img_index];
next_x = (r * cosecant_single(x, y)) + ((1 - r) * secant_single(x, y));
y = (r * cosecant_single(y, x)) + ((1 - r) * secant_single(y, x));
x = next_x;
if((pow(x, 2) + pow(y, 2)) >= escape) break;
}
frame_output[img_index] = iter;
//frame_output[img_index] = mask[img_index] * 255;
}
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