Created
June 23, 2017 17:24
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#include <stdio.h> | |
#include <math.h> | |
#include <glib/gtypes.h> // srsly guys? | |
#include <gts.h> | |
void mandelbulb(gdouble **a, GtsCartesianGrid g, guint i, gpointer data) | |
{ | |
guint j, k, n; | |
gdouble x, y, z = g.z; | |
gdouble xi, yi, zi; | |
gdouble r, theta, phi, power = 8; | |
gdouble *row; | |
for(k = 0, y = g.y; k < g.ny; k++, y += g.dy) | |
{ | |
row = a[k]; | |
for(j = 0, x = g.x; j < g.nx; j++, x += g.dx) | |
{ | |
xi = 0; | |
yi = 0; | |
zi = 0; | |
for(n = 0; n < 6; n++) | |
{ | |
r = sqrt(xi * xi + yi * yi + zi * zi); | |
theta = atan2(sqrt(xi * xi + yi * yi), zi); | |
phi = atan2(yi, xi); | |
xi = pow(r, power) * sin(theta * power) * cos(phi * power) + x; | |
yi = pow(r, power) * sin(theta * power) * sin(phi * power) + y; | |
zi = pow(r, power) * cos(theta * power) + z; | |
} | |
row[j] = sqrt(xi * xi + yi * yi + zi * zi); | |
if(!isfinite(row[j])) | |
row[j] = G_MAXDOUBLE; | |
} | |
} | |
} | |
int main(int argc, char **argv) | |
{ | |
GtsCartesianGrid grid; | |
GtsSurface *s; | |
grid.nx = 1000; | |
grid.ny = 1000; | |
grid.nz = 1000; | |
grid.x = -1.2; | |
grid.y = -1.2; | |
grid.z = -1.2; | |
grid.dx = 2.4 / grid.nx; | |
grid.dy = 2.4 / grid.ny; | |
grid.dz = 2.4 / grid.nz; | |
s = gts_surface_new(gts_surface_class(), gts_face_class(), | |
gts_edge_class(), gts_vertex_class()); | |
gts_isosurface_tetra(s, grid, (GtsIsoCartesianFunc)mandelbulb, NULL, 1e308); | |
fprintf(stderr, "Origional surface:\n"); | |
gts_surface_print_stats(s, stderr); | |
gts_surface_write(s, stdout); | |
return 0; | |
} |
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