Function DrawHouseInGUI

src/town_gui.cpp:1370–1417

* Draw a house that does not exist. * @param x Position x of image. * @param y Position y of image. * @param house_id House ID to draw. * @param view The house's 'view'. */

 * @param view The house's 'view'.
 */
void DrawHouseInGUI(int x, int y, HouseID house_id, int view)
{
	auto draw = [](int x, int y, HouseID house_id, int view) {
		if (house_id >= NEW_HOUSE_OFFSET) {
			/* Houses don't necessarily need new graphics. If they don't have a
			 * spritegroup associated with them, then the sprite for the substitute
			 * house id is drawn instead. */
			const HouseSpec *spec = HouseSpec::Get(house_id);
			if (spec->grf_prop.HasSpriteGroups()) {
				DrawNewHouseTileInGUI(x, y, spec, house_id, view);
				return;
			} else {
				house_id = HouseSpec::Get(house_id)->grf_prop.subst_id;
			}
		}

		/* Retrieve data from the draw town tile struct */
		const DrawBuildingsTileStruct &dcts = GetTownDrawTileData()[house_id << 4 | view << 2 | TOWN_HOUSE_COMPLETED];
		DrawSprite(dcts.ground.sprite, dcts.ground.pal, x, y);

		/* Add a house on top of the ground? */
		if (dcts.building.sprite != 0) {
			Point pt = RemapCoords(dcts.origin.x, dcts.origin.y, dcts.origin.z);
			DrawSprite(dcts.building.sprite, dcts.building.pal, x + UnScaleGUI(pt.x), y + UnScaleGUI(pt.y));
		}
	};

	/* Houses can have 1x1, 1x2, 2x1 and 2x2 layouts which are individual HouseIDs. For the GUI we need
	 * draw all of the tiles with appropriate positions. */
	int x_delta = ScaleSpriteTrad(TILE_PIXELS);
	int y_delta = ScaleSpriteTrad(TILE_PIXELS / 2);

	const HouseSpec *hs = HouseSpec::Get(house_id);
	if (hs->building_flags.Test(BuildingFlag::Size2x2)) {
		draw(x, y - y_delta - y_delta, house_id, view); // North corner.
		draw(x + x_delta, y - y_delta, house_id + 1, view); // West corner.
		draw(x - x_delta, y - y_delta, house_id + 2, view); // East corner.
		draw(x, y, house_id + 3, view); // South corner.
	} else if (hs->building_flags.Test(BuildingFlag::Size2x1)) {
		draw(x + x_delta / 2, y - y_delta, house_id, view); // North east tile.
		draw(x - x_delta / 2, y, house_id + 1, view); // South west tile.
	} else if (hs->building_flags.Test(BuildingFlag::Size1x2)) {
		draw(x - x_delta / 2, y - y_delta, house_id, view); // North west tile.
		draw(x + x_delta / 2, y, house_id + 1, view); // South east tile.
	} else {
		draw(x, y, house_id, view);
	}
}

/**
 * Get name for a prototype house.