/*** HELPER FUNCTIONS ****/
/// <summary>
/// This function will search the cells that the unit can see for the closest enemy Unit.
/// </summary>
/// <param name="unit">The unit doing the searching</param>
/// <param name="gw">The GameWorld to search</param>
/// <returns>The closest enemy Unit or null if none exists</returns>
private static Unit searchCellsForEnemy(Unit unit, GameWorld gw)
{
byte offset = (byte)unit.stats.visibilityRange;
int xStart = (short)unit.x - offset;
int xEnd = (short)unit.x + offset;
int yStart = (short)unit.y - offset;
int yEnd = (short)unit.y + offset;
// Make sure that our bounds are valid. (Assumes that no Unit has a visibility range longer than the map.)
if (xStart < 0)
{
xStart = 0;
}
else if (xEnd >= gw.map.width)
{
xEnd = gw.map.width;
}
if (yStart < 0)
{
yStart = 0;
}
else if (yEnd >= gw.map.height)
{
yEnd = gw.map.height;
}
Unit target = null;
float distance = 10000f;
// Set all cell explored flags to true.
for (int i = xStart; i < xEnd; i++)
{
for (int j = yStart; j < yEnd; j++)
{
Unit temp = gw.map.getCell(i, j).getUnit();
if (temp != null && unit.getOwner().isEnemy(temp.getOwner()))
{
float tDis = EntityLocController.findDistance(unit.x, unit.y, temp.x, temp.y);
if (tDis < distance)
{
target = temp;
distance = tDis;
}
}
}
}
return(target);
}
/// <summary>
/// This method will find the cell closest to 'unit' that 'entity' is currently occupying.
/// </summary>
/// <param name="unit"></param>
/// <param name="entity"></param>
/// <returns></returns>
public static Cell findClosestCell(Unit unit, StaticEntity se, GameWorld gw)
{
Cell cell = null;
float dis = 10000;
short xC = se.orginCell.Xcoord;
short yC = se.orginCell.Ycoord;
short width = se.width;
short height = se.height;
for (int i = 0; i < width; i++)
{
for (int j = 0; j < height; j++)
{
if (EntityLocController.findDistance(unit.x, unit.y, xC + i, yC + j) <= dis)
{
cell = gw.map.getCell(xC + i, yC + j);
dis = EntityLocController.findDistance(unit.x, unit.y, xC + i, yC + j);
}
}
}
return(cell);
}