static MissileNode()
{
template = UnarchiveNode("missile", "sks");
// use a local variable to avoid multiple virtual call to the `PhysicsBody` property
var body = SKPhysicsBody.BodyWithCircleOfRadius(defaultSize);
body.CategoryBitMask = Category.Missile;
body.ContactTestBitMask = Category.Ship | Category.Asteroid | Category.Planet | Category.Edge;
body.CollisionBitMask = 0;
template.PhysicsBody = body;
}
public PlanetNode(PointF initialPosition, float size = defaultSize)
{
var path = new CGPath();
path.AddArc(0, 0, size, 0, (float)Math.PI * 2f, true);
Path = path;
StrokeColor = UIColor.Clear;
FillColor = UIColor.Green;
Position = initialPosition;
// use a local variable to avoid multiple virtual call to the `PhysicsBody` property
var body = SKPhysicsBody.BodyWithCircleOfRadius(size);
body.CategoryBitMask = Category.Planet;
body.CollisionBitMask = Category.Planet | Category.Edge;
body.ContactTestBitMask = 0;
PhysicsBody = body;
}
void Explode()
{
for (int i = 0; i < numberOfChunks; i++)
{
float angle = myRand(0, (float)Math.PI * 2);
float speed = myRand(shipChunkMinimumSpeed, shipChunkMaximumSpeed);
var position = new PointF(myRand(Position.X - shipChunkDispersion, Position.Y + shipChunkDispersion),
myRand(Position.Y - shipChunkDispersion, Position.Y + shipChunkDispersion));
var explosion = new ExplosionNode(Scene, position);
var body = SKPhysicsBody.BodyWithCircleOfRadius(0.25f);
body.CollisionBitMask = 0;
body.ContactTestBitMask = 0;
body.CategoryBitMask = 0;
body.Velocity = new CGVector((float)Math.Cos(angle) * speed, (float)Math.Sin(angle) * speed);
explosion.PhysicsBody = body;
Scene.AddChild(explosion);
}
RunAction(SKAction.Sequence(
SKAction.WaitForDuration(removeShipTime),
SKAction.RemoveFromParent()
));
}