protected Shape(Phys2DTransform transform)
{
Debug.Assert(transform != null);
this.Transform = transform;
this.Transform.OnMove += this.HandleTransformMove;
}
public static Phys2DTransform Lerp(Phys2DTransform a, Phys2DTransform b, float t)
{
var position = Vector2.Lerp(a.Position, b.Position, t);
var rotation = Mathf.Lerp(a.Rotation, b.Rotation, t);
return(new Phys2DTransform(position, rotation));
}
public Circle(Phys2DTransform transform, float radius)
: base(transform)
{
Debug.Assert(radius > 0f);
this.Radius = radius;
this.HandleTransformMove();
}
public Body(Shape shape, float mass)
{
Debug.Assert(shape != null);
Debug.Assert(mass > 0f);
this.initialTransform = shape.Transform.Clone();
this.Shape = shape;
this.Mass = mass;
this.Reset();
}
public Polyline(Phys2DTransform transform, PointSet localPoints)
: base(transform)
{
Debug.Assert(localPoints != null && localPoints.Count >= 2);
this.localPoints = localPoints;
this.localSegments = new List <LineSegment>();
FillMultiEdgeSegments(this.localPoints, this.localSegments);
this.worldPoints = new PointSet();
this.worldSegments = new List <LineSegment>();
this.HandleTransformMove();
}
public Polygon(Phys2DTransform transform, PointSet localPoints)
: base(transform)
{
Debug.Assert(localPoints != null && localPoints.Count >= 3);
this.localPoints = localPoints;
this.localEdges = new List <LineSegment>();
FillPolygonEdges(this.localPoints, this.localEdges);
// TODO: Assert whether any edges intersect
this.worldPoints = new PointSet();
this.worldEdges = new List <LineSegment>();
this.HandleTransformMove();
}
public void Transform(Phys2DTransform transform)
{
Debug.Assert(transform != null);
var shouldRotate = !Mathf.Approximately(transform.Rotation, 0f);
var shouldOffset = transform.Position != Vector2.zero;
for (var i = 0; i < this.points.Count; i++)
{
var newP = this.points[i];
if (shouldRotate)
{
newP = newP.Rotate(transform.Rotation);
}
if (shouldOffset)
{
newP += transform.Position;
}
this.points[i] = newP;
}
}
public Phys2DTransform LerpedTransform(float t)
{
return(Phys2DTransform.Lerp(this.lastTransform, this.Shape.Transform, t));
}
public void Reset()
{
this.Shape.Transform.Set(this.initialTransform);
this.lastTransform = this.Shape.Transform.Clone();
}
public Polygon(Phys2DTransform transform, List <Vector2> localPoints)
: this(transform, new PointSet(localPoints))
{
}
public void Set(Phys2DTransform transform)
{
this.Set(transform.Position, transform.Rotation);
}
