Function GetViewportY

src/viewport.cpp:1201–1205

* Returns the y coordinate in the viewport coordinate system where the given * tile is painted. * @param tile Any tile. * @return The viewport y coordinate where the tile is painted. */

 * @return The viewport y coordinate where the tile is painted.
 */
static int GetViewportY(Point tile)
{
	/* Each increment in X or Y direction moves down by half a tile, i.e. TILE_PIXELS / 2. */
	return (tile.y * (int)(TILE_PIXELS / 2) + tile.x * (int)(TILE_PIXELS / 2) - TilePixelHeightOutsideMap(tile.x, tile.y)) << ZOOM_BASE_SHIFT;
}

/**
 * Add the landscape to the viewport, i.e. all ground tiles and buildings.