Function Map_CreateLandscape

src/map.c:1439–1673

* Creates the landscape using the given seed. * @param seed The seed. */

 * @param seed The seed.
 */
void Map_CreateLandscape(uint32 seed)
{
	static const int8 around[] = {0, -1, 1, -16, 16, -17, 17, -15, 15, -2, 2, -32, 32, -4, 4, -64, 64, -30, 30, -34, 34};

	uint16 i;
	uint16 j;
	uint16 k;
	uint8  memory[273];
	uint16 currentRow[64];
	uint16 previousRow[64];
	uint16 spriteID1;
	uint16 spriteID2;
	uint16 *iconMap;

	Tools_Random_Seed(seed);

	/* Place random data on a 4x4 grid. */
	for (i = 0; i < 272; i++) {
		memory[i] = Tools_Random_256() & 0xF;
		if (memory[i] > 0xA) memory[i] = 0xA;
	}

	i = (Tools_Random_256() & 0xF) + 1;
	while (i-- != 0) {
		int16 base = Tools_Random_256();

		for (j = 0; j < lengthof(around); j++) {
			int16 index = min(max(0, base + around[j]), 272);

			memory[index] = (memory[index] + (Tools_Random_256() & 0xF)) & 0xF;
		}
	}

	i = (Tools_Random_256() & 0x3) + 1;
	while (i-- != 0) {
		int16 base = Tools_Random_256();

		for (j = 0; j < lengthof(around); j++) {
			int16 index = min(max(0, base + around[j]), 272);

			memory[index] = Tools_Random_256() & 0x3;
		}
	}

	for (j = 0; j < 16; j++) {
		for (i = 0; i < 16; i++) {
			g_map[Tile_PackXY(i * 4, j * 4)].groundTileID = memory[j * 16 + i];
		}
	}

	/* Average around the 4x4 grid. */
	for (j = 0; j < 16; j++) {
		for (i = 0; i < 16; i++) {
			for (k = 0; k < 21; k++) {
				const uint16 *offsets = _offsetTable[(i + 1) % 2][k];
				uint16 packed1;
				uint16 packed2;
				uint16 packed;