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// gcc test.c -lmgl
#include <mgl2/mgl_cf.h>
int main()
{
HMDT dat = mgl_create_data_size(30,40,1); // data to for plotting
for(long i=0;i<30;i++) for(long j=0;j<40;j++)
mgl_data_set_value(dat, 1/(1+(i-15)*(i-15)/9.+(j-20)*(j-20)/16.),i,j,0);
HMGL gr = mgl_create_graph(600, 400); // class for plot drawing
mgl_set_ranges(gr,0,2,0,2,0,1); // ranges of coordinates
mgl_rotate(gr,50,60,0); // rotate axis
mgl_set_light(gr,1); // enable lighting
mgl_surf(gr,dat,"",""); // plot surface
mgl_cont(gr,dat,"y",""); // plot yellow contour lines
mgl_axis(gr,"xyzt","",""); // draw axis
mgl_puts(gr,1,1,1.2,"\\i f = \\dfrac{1}{1+(5x-5)^2+(5y-5)^2}","",-1);
mgl_write_frame(gr,"sample.png",""); // save it
mgl_delete_data(dat); // free used memory
mgl_delete_graph(gr);
}
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