Function Map_UpdateMinimapPosition

src/map.c:235–312

* Update the minimap position. * * @param packed The new position. * @param forceUpdate If true force the update even if the position didn't change. */

 * @param forceUpdate If true force the update even if the position didn't change.
 */
void Map_UpdateMinimapPosition(uint16 packed, bool forceUpdate)
{
	/* Border tiles of the viewport relative to the top-left. */
	static const uint16 viewportBorder[] = {
		0x0000, 0x0001, 0x0002, 0x0003, 0x0004, 0x0005, 0x0006, 0x0007, 0x0008, 0x0009, 0x000A, 0x000B, 0x000C, 0x000D, 0x000E,
		0x0040, 0x004E,
		0x0080, 0x008E,
		0x00C0, 0x00CE,
		0x0100, 0x010E,
		0x0140, 0x014E,
		0x0180, 0x018E,
		0x01C0, 0x01CE,
		0x0200, 0x020E,
		0x0240, 0x0241, 0x0242, 0x0243, 0x0244, 0x0245, 0x0246, 0x0247, 0x0248, 0x0249, 0x024A, 0x024B, 0x024C, 0x024D, 0x024E,
		0xFFFF
	};

	static uint16 minimapPreviousPosition = 0;

	bool cleared;
	Screen oldScreenID;

	if (packed != 0xFFFF && packed == minimapPreviousPosition && !forceUpdate) return;
	if (g_selectionType == SELECTIONTYPE_MENTAT) return;

	oldScreenID = GFX_Screen_SetActive(SCREEN_1);

	cleared = false;

	if (minimapPreviousPosition != 0xFFFF && minimapPreviousPosition != packed) {
		const uint16 *m;

		cleared = true;

		for (m = viewportBorder; *m != 0xFFFF; m++) {
			uint16 curPacked;

			curPacked = minimapPreviousPosition + *m;
			BitArray_Clear(g_displayedMinimap, curPacked);

			GUI_Widget_Viewport_DrawTile(curPacked);
		}
	}

	if (packed != 0xFFFF && (packed != minimapPreviousPosition || forceUpdate)) {
		const uint16 *m;
		uint16 mapScale;
		const MapInfo *mapInfo;
		uint16 left, top, right, bottom;

		mapScale = g_scenario.mapScale;
		mapInfo = &g_mapInfos[mapScale];

		left   = (Tile_GetPackedX(packed) - mapInfo->minX) * (mapScale + 1) + 256;
		right  = left + mapScale * 15 + 14;
		top    = (Tile_GetPackedY(packed) - mapInfo->minY) * (mapScale + 1) + 136;
		bottom = top + mapScale * 10 + 9;