LengthSquared() public méthode

Get the length squared. For performance, use this instead of Length (if possible).
public LengthSquared ( ) : float
Résultat float
Vec2 Class Documentation
Exemple #1
0
		internal override void SolveVelocityConstraints(TimeStep step)
		{
			Body b = _body2;

			Vec2 r = Common.Math.Mul(b.GetXForm().R, _localAnchor - b.GetLocalCenter());

			// Cdot = v + cross(w, r)
			Vec2 Cdot = b._linearVelocity + Vec2.Cross(b._angularVelocity, r);
			Vec2 impulse = Box2DX.Common.Math.Mul(_mass, -(Cdot + _beta * _C + _gamma * _impulse));

			Vec2 oldImpulse = _impulse;
			_impulse += impulse;
			float maxImpulse = step.Dt * _maxForce;
			if (_impulse.LengthSquared() > maxImpulse * maxImpulse)
			{
				_impulse *= maxImpulse / _impulse.Length();
			}
			impulse = _impulse - oldImpulse;

			b._linearVelocity += b._invMass * impulse;
			b._angularVelocity += b._invI * Vec2.Cross(r, impulse);
		}