protected override void Open()
{
dispose += DemoHelper.BasicDemoSetup(DemoInfo);
Vector2D gravityCenter = new Vector2D(500, 500);
Scalar gravityPower = 200;
Scene.Engine.AddLogic(new GravityPointField(gravityCenter, gravityPower, new Lifespan()));
DemoHelper.AddRagDoll(DemoInfo, gravityCenter + new Vector2D(0, -20));
Scalar length = 41;
Scalar size = 8
;
bool reverse = false;
for (Scalar distance = 250; distance < 650; length += 10, size *= 2, distance += 60 + length)
{
Scalar da = MathHelper.TwoPi / size;// ((MathHelper.TWO_PI * distance) / size);
Scalar l2 = length / 2;
// da /= 2;
Vector2D[] vertexes = new Vector2D[]
{
Vector2D.FromLengthAndAngle(distance - l2, da / 2),
Vector2D.FromLengthAndAngle(distance - l2, -da / 2),
Vector2D.FromLengthAndAngle(distance + l2, -da / 2),
Vector2D.FromLengthAndAngle(distance + l2, da / 2),
};
//da *= 2;
Vector2D[] vertexes2 = VertexHelper.CenterVertexes(vertexes);
vertexes = VertexHelper.Subdivide(vertexes2, 5);
PolygonShape shape = ShapeFactory.CreateColoredPolygon(vertexes, 1.5f);
for (Scalar angle = 0; angle < MathHelper.TwoPi; angle += da)
{
Vector2D position = Vector2D.FromLengthAndAngle(distance, angle) + gravityCenter;
Body body = DemoHelper.AddShape(DemoInfo, shape, (size * length) / 10, new ALVector2D(angle, position));
body.State.Velocity.Linear = DemoHelper.GetOrbitVelocity(gravityCenter, Vector2D.FromLengthAndAngle(distance - length, angle) + gravityCenter, gravityPower);
body.State.Velocity.Linear *= .5f;
body.State.Velocity.Angular = -(body.State.Velocity.Linear.Magnitude) / (distance);// *(1 / MathHelper.TWO_PI);
if (reverse)
{
body.State.Velocity.Linear = -body.State.Velocity.Linear;
body.State.Velocity.Angular = -body.State.Velocity.Angular;
}
}
reverse = !reverse;
}
}
