Function GetTileFromScreenXY

src/viewport.cpp:445–454

When used for zooming, check area below current coordinates (x,y) * and return the tile of the zoomed out/in position (zoom_x, zoom_y) * when you just want the tile, make x = zoom_x and y = zoom_y */

 * and return the tile of the zoomed out/in position (zoom_x, zoom_y)
 * when you just want the tile, make x = zoom_x and y = zoom_y */
static Point GetTileFromScreenXY(int x, int y, int zoom_x, int zoom_y)
{
	if (Window *w = FindWindowFromPt(x, y); w != nullptr) {
		if (Viewport *vp = IsPtInWindowViewport(w, x, y); vp != nullptr) {
			return TranslateXYToTileCoord(*vp, zoom_x, zoom_y);
		}
	}

	return {-1, -1};
}

Point GetTileBelowCursor()
{