public static List <Body> AddPyramid(DemoOpenInfo info, IShape shape, Scalar mass, BoundingRectangle rect, Scalar xSpacing, Scalar ySpacing)
{
BoundingRectangle shapeRect;
Matrix2x3 ident = Matrix2x3.Identity;
shape.CalcBoundingRectangle(ref ident, out shapeRect);
Vector2D size = shapeRect.Max - shapeRect.Min;
Vector2D spacing = new Vector2D(xSpacing, ySpacing) + size;
Vector2D end = rect.Max - size * .5f;
Vector2D begin = rect.Min + size * .5f;
Vector2D center = (end + begin) * .5f;
List <Body> result = new List <Body>();
for (int row = 1; begin.Y + row * spacing.Y < end.Y; row++)
{
Scalar start = center.X - ((spacing.X * row - 1) * .5f);
for (int column = 0; column < row; ++column)
{
Vector2D pos = new Vector2D(start + spacing.X * column, row * spacing.Y + begin.Y);
if (pos.X > begin.X && pos.X <= end.X)
{
result.Add(AddShape(info, shape, mass, new ALVector2D(0, pos)));
}
}
}
return(result);
}
/// <summary>
/// Updates all the values caluclated from the State.Position.
/// Re-calculates the Matrices property the re-calculates the Rectangle property
/// from that.
/// </summary>
public void ApplyPosition()
{
MathHelper.ClampAngle(ref state.Position.Angular);
Matrix2x3 matrix;
ALVector2D.ToMatrix2x3(ref state.Position, out matrix);
Matrix2x3.Multiply(ref matrix, ref transformation, out matrix);
matrices.SetToWorld(ref matrix);
shape.CalcBoundingRectangle(ref matrix, out rectangle);
if (engine == null || !engine.inUpdate)
{
OnPositionChanged();
}
}
public static List <Body> AddGrid(DemoOpenInfo info, IShape shape, Scalar mass, BoundingRectangle rect, Scalar xSpacing, Scalar ySpacing)
{
BoundingRectangle shapeRect;
Matrix2x3 ident = Matrix2x3.Identity;
shape.CalcBoundingRectangle(ref ident, out shapeRect);
Vector2D size = shapeRect.Max - shapeRect.Min;
Vector2D spacing = new Vector2D(xSpacing, ySpacing) + size;
Vector2D end = rect.Max - size * .5f;
Vector2D begin = rect.Min + size * .5f;
Vector2D pos;
List <Body> result = new List <Body>();
for (pos.X = begin.X; pos.X <= end.X; pos.X += spacing.X)
{
for (pos.Y = begin.Y; pos.Y <= end.Y; pos.Y += spacing.Y)
{
result.Add(AddShape(info, shape, mass, new ALVector2D(0, pos)));
}
}
return(result);
}
public static List<Body> AddPyramid(DemoOpenInfo info, IShape shape, Scalar mass, BoundingRectangle rect, Scalar xSpacing, Scalar ySpacing)
{
BoundingRectangle shapeRect;
Matrix2x3 ident = Matrix2x3.Identity;
shape.CalcBoundingRectangle(ref ident, out shapeRect);
Vector2D size = shapeRect.Max - shapeRect.Min;
Vector2D spacing = new Vector2D(xSpacing, ySpacing) + size;
Vector2D end = rect.Max - size * .5f;
Vector2D begin = rect.Min + size * .5f;
Vector2D center = (end + begin) * .5f;
List<Body> result = new List<Body>();
for (int row = 1; begin.Y + row * spacing.Y < end.Y; row++)
{
Scalar start = center.X - ((spacing.X * row - 1) * .5f);
for (int column = 0; column < row; ++column)
{
Vector2D pos = new Vector2D(start + spacing.X * column, row * spacing.Y + begin.Y);
if (pos.X > begin.X && pos.X <= end.X)
{
result.Add(AddShape(info, shape, mass, new ALVector2D(0, pos)));
}
}
}
return result;
}
public static List<Body> AddGrid(DemoOpenInfo info, IShape shape, Scalar mass, BoundingRectangle rect, Scalar xSpacing, Scalar ySpacing)
{
BoundingRectangle shapeRect;
Matrix2x3 ident = Matrix2x3.Identity;
shape.CalcBoundingRectangle(ref ident, out shapeRect);
Vector2D size = shapeRect.Max - shapeRect.Min;
Vector2D spacing = new Vector2D(xSpacing, ySpacing) + size;
Vector2D end = rect.Max - size * .5f;
Vector2D begin = rect.Min + size * .5f;
Vector2D pos;
List<Body> result = new List<Body>();
for (pos.X = begin.X; pos.X <= end.X; pos.X += spacing.X)
{
for (pos.Y = begin.Y; pos.Y <= end.Y; pos.Y += spacing.Y)
{
result.Add(AddShape(info, shape, mass, new ALVector2D(0, pos)));
}
}
return result;
}
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;
});
}