Function Unit_StartMovement

src/unit.c:1059–1123

* Initiate the first movement of a Unit when the pathfinder has found a route. * * @param unit The Unit to operate on. * @return True if movement was initiated (not blocked etc). */

 * @return True if movement was initiated (not blocked etc).
 */
bool Unit_StartMovement(Unit *unit)
{
	const UnitInfo *ui;
	int8 orientation;
	uint16 packed;
	uint16 type;
	tile32 position;
	uint16 speed;
	int16 score;

	if (unit == NULL) return false;

	ui = &g_table_unitInfo[unit->o.type];

	orientation = (int8)((unit->orientation[0].current + 16) & 0xE0);

	Unit_SetOrientation(unit, orientation, true, 0);
	Unit_SetOrientation(unit, orientation, false, 1);

	position = Tile_MoveByOrientation(unit->o.position, orientation);

	packed = Tile_PackTile(position);

	unit->distanceToDestination = 0x7FFF;

	score = Unit_GetTileEnterScore(unit, packed, orientation / 32);

	if (score > 255 || score == -1) return false;

	type = Map_GetLandscapeType(packed);
	if (type == LST_STRUCTURE) type = LST_CONCRETE_SLAB;

	speed = g_table_landscapeInfo[type].movementSpeed[ui->movementType];

	if (unit->o.type == UNIT_SABOTEUR && type == LST_WALL) speed = 255;
	unit->o.flags.s.isSmoking = false;

	/* ENHANCEMENT -- the flag is never set to false in original Dune2; in result, once the wobbling starts, it never stops. */
	if (g_dune2_enhanced) {
		unit->o.flags.s.isWobbling = g_table_landscapeInfo[type].letUnitWobble;
	} else {
		if (g_table_landscapeInfo[type].letUnitWobble) unit->o.flags.s.isWobbling = true;
	}

	if ((ui->o.hitpoints / 2) > unit->o.hitpoints && ui->movementType != MOVEMENT_WINGER) speed -= speed / 4;

	Unit_SetSpeed(unit, speed);

	if (ui->movementType != MOVEMENT_SLITHER) {
		tile32 positionOld;

		positionOld = unit->o.position;
		unit->o.position = position;

		Unit_UpdateMap(1, unit);

		unit->o.position = positionOld;
	}