void CreateAvatar()
{
Lifespan avatarLifespan = new Lifespan();
Sprite sprite = GetSprite("tank.png");
Vector2D[][] polygons = sprite.Polygons;
MultiPolygonShape shape = new MultiPolygonShape(polygons, 4);
shape.Tag = sprite;
ObjectIgnorer ignorer = new ObjectIgnorer();
Body a = new Body(new PhysicsState(new ALVector2D(0, 0, 0)),
shape,
300,//new MassInfo(40, Scalar.PositiveInfinity),
coefficients.Duplicate(),
avatarLifespan);
a.Updated += new EventHandler<UpdatedEventArgs>(avatar_Updated);
avatarBodies = new List<Body>();
avatarOffsets = new List<Vector2D>();
avatarJoints = new List<Joint>();
avatarBodies.Add(a);
a.CollisionIgnorer = ignorer;
Scalar wheelSize = 18;
Scalar wheelSpacing = -9;
Scalar lenghtPercent = .84f;
Matrix2x3 ident = Matrix2x3.Identity;
BoundingRectangle rect;
shape.CalcBoundingRectangle(ref ident, out rect);
Scalar y = (rect.Max.Y +4) ;
Body lastWheel = null ;
BoundingPolygon polygon = new BoundingPolygon(polygons[0]);
Ray ray2 = new Ray(new Vector2D(rect.Max.X, y), -Vector2D.YAxis);
Scalar y3 = y - polygon.Intersects(ray2);
avatarBarrelOffset = new Vector2D(rect.Max.X, y3);
for (Scalar x = rect.Min.X + wheelSize ; x < (rect.Max.X - wheelSize ) * lenghtPercent; x += (wheelSize*2 + wheelSpacing))
{
Ray ray = new Ray(new Vector2D(x, y), -Vector2D.YAxis);
Scalar y2 = y- polygon.Intersects(ray);
Vector2D offset = new Vector2D(x, y2);
Body wheel = new Body(
new PhysicsState(new ALVector2D(0, offset)),
new CircleShape(wheelSize, 30),
10,
new Coefficients(0,3),// coefficients.Duplicate(),
avatarLifespan);
HingeJoint joint = new HingeJoint(a, wheel, offset, avatarLifespan);
joint.Softness = .1f;
wheel.CollisionIgnorer = ignorer;
if (lastWheel != null)
{
AngleJoint joint2 = new AngleJoint(lastWheel, wheel, avatarLifespan);
avatarJoints.Add(joint2);
}
avatarJoints.Add(joint);
avatarOffsets.Add(offset);
avatarBodies.Add(wheel);
lastWheel = wheel;
}
}
