public TargetList GetEnemiesInArcDirection(Vector3D center, Vector3D direction, float radius, float lengthDegrees)
{
Vector2F arcCenter2D = PowerMath.VectorWithoutZ(center);
Vector2F arcDirection2D = PowerMath.VectorWithoutZ(direction);
float arcLength = lengthDegrees * PowerMath.DegreesToRadians;
float fixedActorRadius = 1.5f; // TODO: calculate based on actor.ActorData.Cylinder.Ax2 ?
return(_GetTargetsInRadiusHelper(center, radius, -1,
actor => PowerMath.ArcCircleCollides(arcCenter2D, arcDirection2D, radius, arcLength,
new Circle(actor.Position.X, actor.Position.Y, fixedActorRadius)),
_EnemyActorFilter));
}
private void _CheckCollisions()
{
if (OnCollision == null)
{
return;
}
// check if we collided with anything since last update
float radius = this.ActorData.Cylinder.Ax2;
Circle startCircle = new Circle(_prevUpdatePosition.X, _prevUpdatePosition.Y, radius);
// make a velocity representing the change to the current position
Vector2F velocity = PowerMath.VectorWithoutZ(this.Position - _prevUpdatePosition);
Actor hit = null;
TargetList targets = this.Context.GetEnemiesInRadius(this.Position, radius + 25f);
if (CollisionFilter != null)
{
targets.Actors.RemoveAll(actor => !CollisionFilter(actor));
}
targets.SortByDistanceFrom(_prevUpdatePosition);
foreach (Actor target in targets.Actors)
{
float targetRadius = 1.5f; // TODO: use target.ActorData.Cylinder.Ax2 ?
if (PowerMath.MovingCircleCollides(startCircle, velocity, new Circle(target.Position.X, target.Position.Y, targetRadius)))
{
hit = target;
break;
}
}
if (hit != null)
{
OnCollision(hit);
}
}