/*--------------------------------------------------------------------------------------------
-- FUNCTION: validateSpawns
--
-- DATE: April 7th, 2016
--
-- DESIGNERS: Jaegar Sarauer
--
-- REVISIONS: NONE
--
-- PROGRAMMERS: Jaegar Sarauer
--
-- INTERFACE: bool Map::validateSpawns (int ** map, int ** spawnPoints, int teams)
-- int ** map = The map to check for walls and free space.
-- int ** spawnPoints = A list of x and y points indicating spawn points.
-- int teams = The amount of teams to check.
--
--
-- RETURNS: bool = Are all spawns valid?
--
-- NOTES: This function will attempt to caluclate if the passed in spawn points are able to
-- access eachother determined using A* pathfinding to ensure this is a playable map.
-- All untested paths from one spawn point to another is tested with A*, if the
-- A* path has nodes in it, then the path was successful and this function will
-- return true.
------------------------------------------------------------------------------------------*/
bool Map::validateSpawns (int ** map, int ** spawnPoints, int teams) {
const int moveCost = 10;
const int diagonalMoveCost = 14;
//for each team that exists
for (int i = 0; i < teams; i++) {
//the x and y position of the team currently path finding from
int thisTeamX = spawnPoints[0][i];
int thisTeamY = spawnPoints[1][i];
//for the team that is testing, find a path to all of the other teams
for (int j = i + 1; j < teams; j++) {
//the x and y position of the team currently path finding to
int goalTeamX = spawnPoints[0][j];
int goalTeamY = spawnPoints[1][j];
//find the heuristic values for all points on the map to the goal
if (aStarPath (thisTeamX, thisTeamY, goalTeamX, goalTeamY).size () == 0)
return false;
}
}
return true;
}
void Pathfinding::calculate(BattleUnit *unit, Position endPosition)
{
Position startPosition = unit->getPosition();
_movementType = unit->getArmor()->getMovementType();
_unit = unit;
Tile *destinationTile = _save->getTile(endPosition);
// check if destination is not blocked
if (isBlocked(destinationTile, MapData::O_FLOOR) || isBlocked(destinationTile, MapData::O_OBJECT)) return;
// the following check avoids that the unit walks behind the stairs if we click behind the stairs to make it go up the stairs.
// it only works if the unit is on one of the 2 tiles on the stairs, or on the tile right in front of the stairs.
if (isOnStairs(startPosition, endPosition))
{
endPosition.z++;
destinationTile = _save->getTile(endPosition);
}
// check if we have floor, else lower destination (for non flying units only, because otherwise they never reached this place)
while (canFallDown(destinationTile) && _movementType != MT_FLY)
{
endPosition.z--;
destinationTile = _save->getTile(endPosition);
}
_path.clear();
// look for a possible fast and accurate bresenham path and skip A*
if (startPosition.z == endPosition.z && bresenhamPath(startPosition,endPosition))
{
std::reverse(_path.begin(), _path.end()); //paths are stored in reverse order
return;
}
// Now try through A*.
aStarPath(startPosition, endPosition);
}
