Exemple #1
0
        public LimitHingeJoint3D(IWorld world, IBody3D body1, IBody3D body2, TSVector position, TSVector hingeAxis, FP minLimit, FP maxLimit) : base(world, body1, body2, position, hingeAxis)
        {
            TSVector perpDir = TSVector.up;

            if (TSVector.Dot(perpDir, hingeAxis) > 0.1f)
            {
                perpDir = TSVector.right;
            }

            TSVector sideAxis = TSVector.Cross(hingeAxis, perpDir);

            perpDir = TSVector.Cross(sideAxis, hingeAxis);
            perpDir.Normalize();

            FP len = 15;

            TSVector hingeRelAnchorPos0 = perpDir * len;

            FP       angleToMiddle = FP.Half * (minLimit - maxLimit);
            TSMatrix outMatrix;

            TSMatrix.CreateFromAxisAngle(ref hingeAxis, -angleToMiddle * FP.Deg2Rad, out outMatrix);

            TSVector hingeRelAnchorPos1 = TSVector.Transform(hingeRelAnchorPos0, outMatrix);

            FP hingeHalfAngle  = FP.Half * (minLimit + maxLimit);
            FP allowedDistance = len * 2 * FP.Sin(hingeHalfAngle * FP.Half * FP.Deg2Rad);

            TSVector hingePos = body1.TSPosition;
            TSVector relPos0c = hingePos + hingeRelAnchorPos0;
            TSVector relPos1c = hingePos + hingeRelAnchorPos1;


            distance          = new PointPointDistance((RigidBody)body1, (RigidBody)body2, relPos0c, relPos1c);
            distance.Distance = allowedDistance;
            distance.Behavior = PointPointDistance.DistanceBehavior.LimitMaximumDistance;

            StateTracker.AddTracking(distance);
        }