bool Hit(SVector3 position, SVector3 direction, SVector3 enemyPosition)
{
if ((enemyPosition - position).Length() <= 3f)
{
var enDirection = (enemyPosition - position).Normalized();
var dot = SVector3.Dot(direction, enDirection);
if (dot >= Math.Sin(180 * 60 / Math.PI))
{
return(true);
}
}
return(false);
}
public Vector2[] GetPath(Vector2 start, Vector2 end)
{
NavPoint startPt = navMeshQuery.FindNearestPoly(new SVector3(-start.X, 0, start.Y), new SharpNav.Geometry.Vector3(2f, 2f, 2f));
NavPoint endPt = navMeshQuery.FindNearestPoly(new SVector3(-end.X, 0, end.Y), new SharpNav.Geometry.Vector3(2f, 2f, 2f));
Path path = new Path();
navMeshQuery.FindPath(ref startPt, ref endPt, new NavQueryFilter(), path);
List <SVector3> smoothPath;
//find a smooth path over the mesh surface
int npolys = path.Count;
SVector3 iterPos = new SVector3();
SVector3 targetPos = new SVector3();
navMeshQuery.ClosestPointOnPoly(startPt.Polygon, startPt.Position, ref iterPos);
navMeshQuery.ClosestPointOnPoly(path[npolys - 1], endPt.Position, ref targetPos);
smoothPath = new List <SVector3>(2048);
smoothPath.Add(iterPos);
float STEP_SIZE = 0.5f;
float SLOP = 0.01f;
while (npolys > 0 && smoothPath.Count < smoothPath.Capacity)
{
//find location to steer towards
SVector3 steerPos = new SVector3();
StraightPathFlags steerPosFlag = 0;
NavPolyId steerPosRef = NavPolyId.Null;
if (!GetSteerTarget(navMeshQuery, iterPos, targetPos, SLOP, path, ref steerPos, ref steerPosFlag, ref steerPosRef))
{
break;
}
bool endOfPath = (steerPosFlag & StraightPathFlags.End) != 0 ? true : false;
bool offMeshConnection = (steerPosFlag & StraightPathFlags.OffMeshConnection) != 0 ? true : false;
//find movement delta
SVector3 delta = steerPos - iterPos;
float len = (float)Math.Sqrt(SVector3.Dot(delta, delta));
//if steer target is at end of path or off-mesh link
//don't move past location
if ((endOfPath || offMeshConnection) && len < STEP_SIZE)
{
len = 1;
}
else
{
len = STEP_SIZE / len;
}
SVector3 moveTgt = new SVector3();
VMad(ref moveTgt, iterPos, delta, len);
//move
SVector3 result = new SVector3();
List <NavPolyId> visited = new List <NavPolyId>(16);
NavPoint startPoint = new NavPoint(path[0], iterPos);
navMeshQuery.MoveAlongSurface(ref startPoint, ref moveTgt, out result, visited);
path.FixupCorridor(visited);
npolys = path.Count;
float h = 0;
navMeshQuery.GetPolyHeight(path[0], result, ref h);
result.Y = h;
iterPos = result;
//handle end of path when close enough
if (endOfPath && InRange(iterPos, steerPos, SLOP, 1.0f))
{
//reached end of path
iterPos = targetPos;
if (smoothPath.Count < smoothPath.Capacity)
{
smoothPath.Add(iterPos);
}
break;
}
//store results
if (smoothPath.Count < smoothPath.Capacity)
{
smoothPath.Add(iterPos);
}
}
return(smoothPath.Select(x => new Vector2(-x.X, x.Z)).ToArray());
}