///<summary>
/// Constructs a wrapped shape.
/// A constructor is also available which takes a list of objects rather than just a pair.
/// The shape will be recentered.
///</summary>
///<param name="firstShape">First shape in the wrapped shape.</param>
///<param name="secondShape">Second shape in the wrapped shape.</param>
///<param name="center">Center of the shape before recentering..</param>
public WrappedShape(ConvexShapeEntry firstShape, ConvexShapeEntry secondShape, out Vector3 center)
{
shapes.Add(firstShape);
shapes.Add(secondShape);
UpdateConvexShapeInfo(out center);
shapes.Changed += ShapesChanged;
}
///<summary>
/// Constructs a wrapped shape.
/// A constructor is also available which takes a list of objects rather than just a pair.
/// The shape will be recentered.
///</summary>
///<param name="firstShape">First shape in the wrapped shape.</param>
///<param name="secondShape">Second shape in the wrapped shape.</param>
///<param name="center">Center of the shape before recentering..</param>
public WrappedShape(ConvexShapeEntry firstShape, ConvexShapeEntry secondShape, out Vector3 center)
{
shapes.Add(firstShape);
shapes.Add(secondShape);
OnShapeChanged();
Recenter(out center);
shapes.Changed += ShapesChanged;
}
///<summary>
/// Constructs a wrapped shape.
/// A constructor is also available which takes a list of objects rather than just a pair.
/// The shape will be recentered. If the center is needed, use the other constructor.
///</summary>
///<param name="firstShape">First shape in the wrapped shape.</param>
///<param name="secondShape">Second shape in the wrapped shape.</param>
public WrappedShape(ConvexShapeEntry firstShape, ConvexShapeEntry secondShape)
{
shapes.Add(firstShape);
shapes.Add(secondShape);
Vector3 v;
Recenter(out v);
shapes.Changed += ShapesChanged;
}
///<summary>
/// Constructs a wrapped shape.
/// A constructor is also available which takes a list of objects rather than just a pair.
/// The shape will be recentered.
///</summary>
///<param name="firstShape">First shape in the wrapped shape.</param>
///<param name="secondShape">Second shape in the wrapped shape.</param>
///<param name="center">Center of the shape before recentering..</param>
public WrappedShape(ConvexShapeEntry firstShape, ConvexShapeEntry secondShape, out Vector3 center)
{
shapes.Add(firstShape);
shapes.Add(secondShape);
UpdateConvexShapeInfo(out center);
shapes.Changed += ShapesChanged;
}
///<summary>
/// Constructs a wrapped shape.
/// A constructor is also available which takes a list of objects rather than just a pair.
/// The shape will be recentered.
///</summary>
///<param name="firstShape">First shape in the wrapped shape.</param>
///<param name="secondShape">Second shape in the wrapped shape.</param>
///<param name="center">Center of the shape before recentering..</param>
public WrappedShape(ConvexShapeEntry firstShape, ConvexShapeEntry secondShape, out Vector3 center)
{
shapes.Add(firstShape);
shapes.Add(secondShape);
OnShapeChanged();
Recenter(out center);
shapes.Changed += ShapesChanged;
}
/// <summary>
/// Constructs a new demo.
/// </summary>
/// <param name="game">Game owning this demo.</param>
public FancyShapesDemo(DemosGame game)
: base(game)
{
var points = new List<Vector3>();
//Setup a random distribution in a cube and compute a convex hull.
var random = new Random(0);
for (int k = 0; k < 40; k++)
{
points.Add(new Vector3(3 * (float)random.NextDouble(), 5 * (float)random.NextDouble(), 3 * (float)random.NextDouble()));
}
var convexHull = new ConvexHull(new Vector3(0, 7, 0), points, 10);
Space.Add(convexHull);
points.Clear();
//Create another random distribution, but this time with more points.
points.Clear();
for (int k = 0; k < 400; k++)
{
points.Add(new Vector3(1 * (float)random.NextDouble(), 3 * (float)random.NextDouble(), 1 * (float)random.NextDouble()));
}
convexHull = new ConvexHull(new Vector3(4, 7, 0), points, 10);
Space.Add(convexHull);
//Minkowski Sums are fancy 'combinations' of objects, where the result is the sum of the individual points making up shapes.
//Think of it as sweeping one shape around and through another; a sphere and a box would produce a rounded-edge box.
var minkowskiSum = new MinkowskiSum(new Vector3(4, -3, 0),
new OrientedConvexShapeEntry(new BoxShape(2, 2, 2)),
new OrientedConvexShapeEntry(new ConeShape(2, 2)), 10);
Space.Add(minkowskiSum);
minkowskiSum = new MinkowskiSum(new Vector3(0, 3, 0),
new OrientedConvexShapeEntry(Quaternion.CreateFromYawPitchRoll(1, 2, 3), new ConeShape(1, 1)),
new OrientedConvexShapeEntry(new TriangleShape(Vector3.Zero, Vector3.Right, Vector3.Forward)), 1);
Space.Add(minkowskiSum);
//Note how this minkowski sum is composed of a cylinder, and another minkowski sum shape.
minkowskiSum = new MinkowskiSum(new Vector3(-4, 10, 0),
new OrientedConvexShapeEntry(new CylinderShape(1, 2)),
new OrientedConvexShapeEntry(new MinkowskiSumShape(
new OrientedConvexShapeEntry(new TriangleShape(new Vector3(1, 1, 1), new Vector3(-2, 0, 0), new Vector3(0, -1, 0))),
new OrientedConvexShapeEntry(new BoxShape(.3f, 1, .3f)))), 10);
Space.Add(minkowskiSum);
//Minkowski sums can also be used on more than two shapes at once. The two-shape constructor is just a convenience wrapper.
//Wrapped objects use an implicit convex hull around a set of shapes.
//Oblique cone:
var cone = new List<ConvexShapeEntry>
{
new ConvexShapeEntry(new CylinderShape(0, 1)),
new ConvexShapeEntry(new RigidTransform(new Vector3(1f, 2, 0)), new SphereShape(0))
};
Space.Add(new WrappedBody(new Vector3(-5, 0, 0), cone, 10));
//Rather odd shape:
var oddShape = new List<ConvexShapeEntry>();
var bottom = new ConvexShapeEntry(new Vector3(-2, 2, 0), new SphereShape(2));
var middle = new ConvexShapeEntry(
new RigidTransform(
new Vector3(-2, 3, 0),
Quaternion.CreateFromAxisAngle(Vector3.Right, (float)Math.PI / 6)),
new CylinderShape(0, 3));
var top = new ConvexShapeEntry(new Vector3(-2, 4, 0), new SphereShape(1f));
oddShape.Add(bottom);
oddShape.Add(middle);
oddShape.Add(top);
Space.Add(new WrappedBody(new Vector3(-3, 4, 0), oddShape, 10));
//Transformable shapes can be any other kind of convex primitive transformed by any affine transformation.
Matrix3x3 transform;
transform = Matrix3x3.Identity;
transform.M23 = .5f;
transform.M13 = .5f;
var transformable = new TransformableEntity(new Vector3(0, 0, 4), new BoxShape(1, 1, 1), transform, 10);
Space.Add(transformable);
Space.Add(new Box(new Vector3(0, -10, 0), 70, 5, 70));
game.Camera.Position = new Vector3(0, 0, 30);
}
///<summary>
/// Constructs a wrapped shape.
/// A constructor is also available which takes a list of objects rather than just a pair.
/// The shape will be recentered. If the center is needed, use the other constructor.
///</summary>
///<param name="firstShape">First shape in the wrapped shape.</param>
///<param name="secondShape">Second shape in the wrapped shape.</param>
public WrappedShape(ConvexShapeEntry firstShape, ConvexShapeEntry secondShape)
{
shapes.Add(firstShape);
shapes.Add(secondShape);
Vector3 v;
Recenter(out v);
shapes.Changed += ShapesChanged;
}