Function ScreenToPt

Main.cpp:52–55

Screen utilities

//Screen utilities
void ScreenToPt(int x, int y, double& px, double& py) {
  px = double(x - window_w / 2) / cam_zoom - cam_x;
  py = double(y - window_h / 2) / cam_zoom - cam_y;
}
void PtToScreen(double px, double py, int& x, int& y) {
  x = int(cam_zoom * (px + cam_x)) + window_w / 2;
  y = int(cam_zoom * (py + cam_y)) + window_h / 2;