3.6.7 Belt sample

Function belt draw surface by belts. You can use ‘x’ style for drawing lines in other direction. The sample code is:

int sample(mglGraph *gr)
{
  mglData a;  mgls_prepare2d(&a);
  gr->Title("Belt plot"); gr->Rotate(50,60);
  gr->Box();  gr->Belt(a);
  return 0;
}