private void AddWheels()
{
PhysicsGameBase pg = Game.Instance as PhysicsGameBase;
if (pg == null)
{
throw new InvalidOperationException("Cannot have a tank in non-physics game");
}
const int wheelCount = 6;
double r = this.Width / (2 * wheelCount);
double left = this.X - this.Width / 2 + r;
double[] wheelYPositions = new double[wheelCount];
for (int i = 0; i < wheelYPositions.Length; i++)
{
wheelYPositions[i] = this.Y - this.Height / 2;
}
wheelYPositions[0] = wheelYPositions[wheelCount - 1] = this.Position.Y - (this.Height * 3 / 8);
for (int i = 0; i < wheelCount; i++)
{
PhysicsObject wheel = new PhysicsObject(2 * r, 2 * r, Shape.Circle);
wheel.Color = Color.Gray;
wheel.CollisionIgnorer = this.CollisionIgnorer;
wheels.Add(wheel);
pg.Add(wheel);
Vector axlePos = new Vector(left + i * (this.Width / wheelCount), wheelYPositions[i]);
wheel.Position = axlePos;
wheel.Mass = this.Mass / 20;
wheel.KineticFriction = 1.0;
wheel.AngularDamping = 0.8;
IMotorJoint joint = (IMotorJoint)pg.Engine.CreateJoint(this, wheel, JointTypes.WheelJoint);
joint.Softness = Mass * 10;
joint.MaxMotorTorque = Mass * 50;
joint.MotorEnabled = false;
joint.Axis = Vector.UnitY;
joints.Add(joint);
pg.Add(joint);
}
}
private void AddCollisionHelpers()
{
PhysicsGameBase physicsGame = Game.Instance as PhysicsGameBase;
if (physicsGame == null)
{
throw new InvalidOperationException("Cannot have a platform character in non-physics game");
}
for (int i = 0; i < collisionHelpers.Length; i++)
{
physicsGame.Add(collisionHelpers[i].Object);
}
physicsGame.AddProtectedCollisionHandler <PhysicsObject, PhysicsObject>(this, OnCollision);
for (int i = 0; i < collisionHelpers.Length; i++)
{
physicsGame.AddProtectedCollisionHandler <PhysicsObject, PhysicsObject>(collisionHelpers[i].Object, collisionHelpers[i].SetObjectBeingHit);
}
}