public static Pos GetDirPos(Pos start, Pos finish)
{
int x = 0;
int y = 0;
if (finish.x > start.x)
x = 1;
else if (finish.x < start.x)
x = -1;
if (finish.y > start.y)
y = 1;
else if (finish.y < start.y)
y = -1;
return new Pos(x, y);
}
public static bool IsAdjacentTo(Pos one, Pos two, bool countDiag)
{
int diffX = one.x - two.x;
int diffY = one.y - two.y;
// Out of range
if (Math.Abs(diffX) > 1)
return false;
// Out of range
if (Math.Abs(diffY) > 1)
return false;
// Diagonal
if (Math.Abs(diffX) == 1 && Math.Abs(diffY) == 1 && countDiag == false)
return false;
return true;
}
public bool CanSeeTile(Pos tp, bool useCollisionInsteadOfSight, int radiusToUse)
{
return CanSeeTile(tp.x, tp.y, useCollisionInsteadOfSight, radiusToUse);
}
public PathNode()
{
pos = Pos.Zero;
parent = null;
g = 0;
h = 0;
}
public static Pos ApplyDirPos(Pos coordPos, Pos dirPos)
{
return new Pos(coordPos.x + dirPos.x, coordPos.y + dirPos.y);
}
public bool IsAdjacentTo(Pos other, bool countDiag)
{
return Pos.IsAdjacentTo(this, other, countDiag);
}
public PathNode(Pos p, PathNode par, int curG, int calcH)
{
pos = p;
parent = par;
g = curG;
h = calcH;
}
public int Distance(Pos other)
{
return (int)Math.Sqrt(Math.Pow((other.x - x), 2) + Math.Pow((other.y - y), 2));
}
/// <summary>
/// This version passes by reference to avoid copying the Pos every call--should help with GC and memory
/// </summary>
/// <param name="other"></param>
/// <returns></returns>
public bool CompareRef(ref Pos other)
{
if (x == other.x && y == other.y)
return true;
else
return false;
}
public bool CanSeeTile(int tx, int ty, bool useCollisionInsteadOfSight, int radiusToUse)
{
bool canSee = false;
int radius = radiusToUse;
Pos pos = this;
if (this.x == tx && this.y == ty)
return true;
if (tx < pos.x + radius && tx > pos.x - radius)
{
if (ty < pos.y + radius && ty > pos.y - radius)
{
int distance = pos.Distance(new Pos(tx, ty));
if (distance <= radius)
{
int xdir = 0;
int ydir = 0;
if (tx < pos.x)
xdir = -1;
if (tx > pos.x)
xdir = 1;
if (ty < pos.y)
ydir = -1;
if (ty > pos.y)
ydir = 1;
int xtravel = Math.Abs(pos.x - tx);
int ytravel = Math.Abs(pos.y - ty);
Pos cursor = new Pos(pos.x, pos.y);
for (int i = 0; i < distance; i++)
{
cursor.x += xdir;
cursor.y += ydir;
ytravel--;
xtravel--;
if (ytravel <= 0)
ydir = 0;
if (xtravel <= 0)
xdir = 0;
bool blocked = false;
// TODO: implement this
//if (useCollisionInsteadOfSight)
// blocked = Game.level.CheckCollision(cursor, true);
//else
// blocked = Game.level.CheckBlocksSight(cursor);
if (blocked)
{
if (i == distance - 1)
canSee = true;
else
canSee = false;
break;
}
else
canSee = true;
}
}
}
else
{
canSee = false;
}
}
else
{
canSee = false;
}
return canSee;
}
public WorldCollisionType CheckCollision(Entity mover, int x, int y, bool aiCalc, Pos dest)
{
return WorldCollisionType.None;
}
public WorldCollisionType CheckCollision(Entity mover, Pos p)
{
return CheckCollision(mover, p.x, p.y, false, p);
}