Module org.dyn4j

Package org.dyn4j.geometry

This package contains geometric and mathematical constructs.

The main focus of this package are Convex Shapes. The classes implementing the Convex interface can be used in collision detection.

Current supported convex shapes:

• Circle
• Polygon an arbitrary convex polygon
• Rectangle
• Triangle
• Slice a piece of a circle
• Ellipse
• HalfEllipse
• Segment special case shape; take care when using this class

Some Shapes, particularly Ellipse and HalfEllipse are not compatible with all collision detection algorithms.

To create more Shape types extend the AbstractShape class and implement the Convex interface to allow participation in collision detection.

All shapes can be constructed using their respective constructors or via the Geometry class. The Shape constructors do not duplicate the input information whereas the Geometry class methods do. The Geometry class methods can also place the newly created shape at the origin for easier manipulation.

While the Shape classes allow for some manipulation, but it's not recommend to do so after creation, except for the rotate and translate methods.

Vectors, points and vertices are all represented by the Vector2 class.

Since:

1.0.0

Version:

3.2.0

Author:

William Bittle

Interface Summary

Interface	Description
Convex	Represents a Convex Shape.
Rotatable	Interface representing an object that can be rotated.
Shape	Represents a geometric Shape.
Shiftable	Represents an object that can be shifted in the x and y plane.
Transformable	Represents an object that is both Rotatable and Translatable.
Translatable	Represents an object that can be translated or moved in the x-y plane.
Wound	Represents a shape that is defined by vertices with line segment connections with counter-clockwise winding.

Class Summary

Class	Description
AABB	Implementation of an Axis-Align Bounding Box.
AbstractShape	Base implementation of the Shape interface.
Capsule	Implementation of a Capsule Convex Shape.
Circle	Implementation of a Circle Convex Shape.
EdgeFeature	Implementation of an edge Feature of a Shape.
Ellipse	Implementation of an Ellipse Convex Shape.
Feature	Represents an indexed feature of a Shape.
Geometry	Contains static methods to perform standard geometric operations.
HalfEllipse	Implementation of an Half-Ellipse Convex Shape.
Interval	Represents a one dimensional numeric Interval.
Link	This class is a specialization of the Segment class that provides smooth sliding across a chain of line segments.
Mass	Represents Mass data for an object about a given point.
Matrix22	Represents a 2x2 Matrix.
Matrix33	Represents a 3x3 Matrix.
PointFeature	Implementation of a point Feature of a Shape.
Polygon	Implementation of an arbitrary polygon Convex Shape.
Ray	Implementation of a ray.
Rectangle	Implementation of a Rectangle Convex Shape.
RobustGeometry	This class provides geometric routines that have guarantees about some properties of their floating point results and operations.
Rotation	This class represents a rotation (in 2D space).
Segment	Implementation of a Line Segment Convex Shape.
Slice	Implementation of a Slice Convex Shape.
Transform	Represents a transformation matrix.
Triangle	Implementation of a Triangle Convex Shape.
Vector2	This class represents a vector or point in 2D space.
Vector3	This class represents a vector or point in 3D space.

Enum Summary

Enum	Description
MassType	Enumeration for special Mass types.