Function Map_ChangeSpiceAmount

src/map.c:771–803

* Change amount of spice at \a packed position. * @param packed Position in the world to modify. * @param dir Direction of change, > 0 means add spice, < 0 means remove spice. */

 * @param dir Direction of change, > 0 means add spice, < 0 means remove spice.
 */
void Map_ChangeSpiceAmount(uint16 packed, int16 dir)
{
	uint16 type;
	uint16 spriteID;

	if (dir == 0) return;

	type = Map_GetLandscapeType(packed);

	if (type == LST_THICK_SPICE && dir > 0) return;
	if (type != LST_SPICE && type != LST_THICK_SPICE && dir < 0) return;
	if (type != LST_NORMAL_SAND && type != LST_ENTIRELY_DUNE && type != LST_SPICE && dir > 0) return;

	if (dir > 0) {
		type = (type == LST_SPICE) ? LST_THICK_SPICE : LST_SPICE;
	} else {
		type = (type == LST_THICK_SPICE) ? LST_SPICE : LST_NORMAL_SAND;
	}

	spriteID = 0;
	if (type == LST_SPICE) spriteID = 49;
	if (type == LST_THICK_SPICE) spriteID = 65;

	spriteID = g_iconMap[g_iconMap[ICM_ICONGROUP_LANDSCAPE] + spriteID] & 0x1FF;
	g_mapTileID[packed] = 0x8000 | spriteID;
	g_map[packed].groundTileID = spriteID;

	Map_FixupSpiceEdges(packed);
	Map_FixupSpiceEdges(packed + 1);
	Map_FixupSpiceEdges(packed - 1);
	Map_FixupSpiceEdges(packed - 64);
	Map_FixupSpiceEdges(packed + 64);
}

/**
 * Sets the viewport position.