/// <summary>
/// Initializes a new instance of the <see cref="TouchablePanel"/> class.
/// </summary>
public TouchablePanel()
{
elementToBody = new Dictionary<FrameworkElement, Body>();
shouldCreateBody = new List<FrameworkElement>();
shouldRemoveBody = new List<FrameworkElement>();
contactJoints = new Dictionary<int, FixedHingeJoint>();
elementToScale = new Dictionary<FrameworkElement, ScaleState>();
ignorer = new ObjectIgnorer();
engine = new PhysicsEngine();
engine.BroadPhase = new SweepAndPruneDetector();
engine.Solver = new SequentialImpulsesSolver();
timer = new PhysicsTimer(PhysicsTimerCallback, 0.01);
Loaded += TouchablePanel_Loaded;
}
public static DisposeCallback CreateTank(DemoOpenInfo info, Vector2D position,List<Body> result)
{
Lifespan avatarLifespan = new Lifespan();
IShape shape = ShapeFactory.CreateSprite(Cache<SurfacePolygons>.GetItem("tank.png"), 4, 18, 2);
ObjectIgnorer ignorer = new ObjectIgnorer();
Body tankBody = new Body(new PhysicsState(new ALVector2D(0, 0, 0)),
shape,
300,//new MassInfo(40, Scalar.PositiveInfinity),
new Coefficients(0, 1),
avatarLifespan);
result.Add(tankBody);
tankBody.State.Position.Linear += position;
tankBody.ApplyPosition();
tankBody.CollisionIgnorer = ignorer;
BodyGraphic graphic = CreateGraphic(tankBody);
graphic.ZOrder = 2;
info.Scene.AddGraphic(graphic);
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(shape.Vertexes);
Ray ray2 = new Ray(new Vector2D(rect.Max.X, y), -Vector2D.YAxis);
Scalar y3 = y - polygon.Intersects(ray2);
Vector2D avatarBarrelOffset = new Vector2D(rect.Max.X + 10, y3);
CircleShape wheelShape = ShapeFactory.CreateColoredCircle(wheelSize, 30);
Scalar force = 0;
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 + position)),
wheelShape,
10,
new Coefficients(0, 3),// coefficients.Duplicate(),
avatarLifespan);
result.Add(wheel);
wheel.CollisionIgnorer = ignorer;
wheel.AngularDamping = .9f;
wheel.Updated += delegate(object sender, UpdatedEventArgs e)
{
wheel.State.ForceAccumulator.Angular += force;
};
info.Scene.AddGraphic(CreateGraphic(wheel));
HingeJoint joint = new HingeJoint(tankBody, wheel, offset + position, avatarLifespan);
joint.Softness = .1f;
info.Scene.Engine.AddJoint(joint);
if (lastWheel != null)
{
AngleJoint joint2 = new AngleJoint(lastWheel, wheel, avatarLifespan);
info.Scene.Engine.AddJoint(joint2);
}
lastWheel = wheel;
}
CircleShape weaponShape = ShapeFactory.CreateColoredCircle(5, 8);
//now begins the abuse of anominous delegates (BIG TIME)
EventHandler<KeyboardEventArgs> keyDownHandler = delegate(object sender, KeyboardEventArgs e)
{
switch (e.Key)
{
case Key.LeftArrow:
force = -1500000;
break;
case Key.RightArrow:
force = 1500000;
break;
case Key.Space:
Scalar velocity = 2000;
Matrix2x3 toWorld = tankBody.Matrices.ToWorld;
Matrix2x2 toWorldNormal = tankBody.Matrices.ToWorldNormal;
// Matrix2D mat = avatarBodies[0].Matrices.ToWorld;
Vector2D direction = toWorldNormal * Vector2D.XAxis;
PhysicsState state = new PhysicsState();
state.Position.Linear = toWorld * (avatarBarrelOffset);
state.Velocity.Linear = velocity * direction + tankBody.State.Velocity.Linear;
Body weapon = new Body(state,
weaponShape,
5,
new Coefficients(1, 1),
new Lifespan(10));
//weapon.CollisionIgnorer = tankBody.CollisionIgnorer;
weapon.Collided += delegate(object sender2, CollisionEventArgs e2)
{
if (!weapon.Lifetime.IsExpired)
{
weapon.Lifetime.IsExpired = true;
AddParticles(info, weapon.State.Position.Linear, weapon.State.Velocity.Linear * .5f, 50);
}
};
// weapon.Collided += weapon_Collided;
tankBody.State.Velocity.Linear -= (velocity * weapon.Mass.Mass * tankBody.Mass.MassInv) * direction;
info.Scene.AddGraphic(CreateGraphic(weapon));
break;
}
};
EventHandler<KeyboardEventArgs> keyUpHandler = delegate(object sender, KeyboardEventArgs e)
{
switch (e.Key)
{
case Key.LeftArrow:
force = 0;
break;
case Key.RightArrow:
force = 0;
break;
}
};
Events.KeyboardDown += keyDownHandler;
Events.KeyboardUp += keyUpHandler;
return delegate()
{
Events.KeyboardDown -= keyDownHandler;
Events.KeyboardUp -= keyUpHandler;
};
}
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;
}
}
