Files
manigraph/example/riemman.c
2024-12-03 22:18:48 -06:00

51 lines
962 B
C

#include <complex.h>
#include <math.h>
#include <stdio.h>
#define KLEIN_IMPLEMENT
#include <klein/klein.h>
#include <klein/norm.h>
#include <klein/parm.h>
#ifndef CMPLX
#define CMPLX(a, b) (a + I * b)
#endif
complex float f(complex float z) { return csqrt(z); }
void riemman(float *d_surface, int *coords, unsigned char *grid)
{
complex float eq;
float u = 2 * ((float)coords[0] / grid[0]) - 1;
float v = 2 * ((float)coords[1] / grid[1]) - 1;
eq = f(CMPLX(u, v));
d_surface[0] = u;
d_surface[1] = v;
d_surface[2] = creal(eq);
d_surface[3] = cimag(eq);
}
int main(void)
{
const char *file_name = "riemman.klein";
struct klein klein;
struct parm parametrization = {
.grid = (unsigned char[]){16, 4},
.m = 2,
.n = 4,
.f = riemman,
};
printf("writing %s\n", file_name);
klein_parametrize(&klein, parametrization);
klein_normalize(&klein);
klein_export_file(klein, file_name);
free(klein.vertex);
free(klein.normals);
return 0;
}