vooga.physicsEngine.geometry.shapes
Class JavaShape

java.lang.Object
  vooga.physicsEngine.geometry.shapes.JavaShape

All Implemented Interfaces:

Shape

public class JavaShape
extends java.lang.Object
implements Shape

Shape implementation that uses the java.awt.Shape framework as the back-end. This allows support for arbitrary closed shapes.

Author:

Peng Shi

Field Summary

java.awt.Shape	javaShape
(package private) double	r2IntegralRatio

Constructor Summary

JavaShape(java.awt.Shape shape)
Creates a JavaShape from a java.awt.Shape object.

Method Summary

java.awt.image.BufferedImage	createBufferedImage(double angularPosition) Creates a BufferedImage representing the given Shape.
BoundingBox	getBoundingBox() Returns the bounding box of a shape.
Vector2f	getCentroid()
double	getR2IntegralEstimate() Obtain an estimate of the integral of R^2 over the whole shape, where R is the distance between each point and the centroid.
Vector2f	getSmallestCorner()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

javaShape

public final java.awt.Shape javaShape

r2IntegralRatio

final double r2IntegralRatio

Constructor Detail

JavaShape

public JavaShape(java.awt.Shape shape)

Creates a JavaShape from a java.awt.Shape object.

Parameters:

shape -

Method Detail

createBufferedImage

public java.awt.image.BufferedImage createBufferedImage(double angularPosition)

Description copied from interface: Shape

Creates a BufferedImage representing the given Shape. This image will have the same bounding box as the given shape. The image will have black outline and white interior. This is mostly for simple games and internal testing.

Specified by:

createBufferedImage in interface Shape

Returns:

getBoundingBox

public BoundingBox getBoundingBox()

Description copied from interface: Shape

Returns the bounding box of a shape. The bounding box always contains the shape until all rotations.

Specified by:

getBoundingBox in interface Shape

Returns:

getR2IntegralEstimate

public double getR2IntegralEstimate()

Description copied from interface: Shape

Obtain an estimate of the integral of R^2 over the whole shape, where R is the distance between each point and the centroid. This is used to compute a reasonable estimate for the moment of inertia.

Specified by:

getR2IntegralEstimate in interface Shape

Returns:

getCentroid

public Vector2f getCentroid()

Specified by:

getCentroid in interface Shape

Returns:

the relative Shape coordinate of the centroid

getSmallestCorner

public Vector2f getSmallestCorner()

Specified by:

getSmallestCorner in interface Shape

Returns:

the relative Shape coordinate of the top left corner of the tightest bounding box (this is needed for translating the game position coordinate--based on the smallest corner--to the physics engine coordinate--based on the centroid.