Package physics.collision.shape

Class Circle

java.lang.Object

physics.collision.shape.PrimitiveShape

physics.collision.shape.Circle

public class Circle
extends PrimitiveShape

The shape implementation of a circle.

Since:

19.06.2021

Author:

Juyas

Field Summary

Fields inherited from class physics.collision.shape.PrimitiveShape

absoluteCentroid, absolutes, boundingSphere, faces, relativeCentroid, relatives, vertices

Constructor Summary

Constructors

Constructor	Description
Circle(org.joml.Vector2f relativeCenter, float radius)

Method Summary

Modifier and Type	Method	Description
void	adjust()	Will be called by PrimitiveShape.setPosition(Vector2f) after the new position was set.
boolean	intersection(Circle circle)	Check intersection between two circles efficiently without using square roots.
RayCastResult	rayCast(org.joml.Vector2f start, org.joml.Vector2f rayDirection, float maxLength)	Calculate a raycast against this circle using absolute coordinates.
org.joml.Vector2f	supportPoint(org.joml.Vector2f v)	According to GJKSM this method is supposed to calculate the point of the shape, that is most in direction of v.

Methods inherited from class physics.collision.shape.PrimitiveShape

boundingSphere, centroid, faces, getAbsolutePoints, init, initSphere, position, rotateShape, setPosition, setPosition, type, vertices

Methods inherited from class java.lang.Object

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

Constructor Details

Circle

public Circle(org.joml.Vector2f relativeCenter,
 float radius)

Method Details

adjust

public void adjust()

Description copied from class: PrimitiveShape

Will be called by PrimitiveShape.setPosition(Vector2f) after the new position was set. Used to recalculate the absolute coordinates.

Overrides:

adjust in class PrimitiveShape

supportPoint

public org.joml.Vector2f supportPoint(org.joml.Vector2f v)

Description copied from class: PrimitiveShape

According to GJKSM this method is supposed to calculate the point of the shape, that is most in direction of v. The general rule is, the more primitive the shape is, the more efficient this method can be. This method may be described as max{v*x,x element of Shape} for any complex shape.

Overrides:

supportPoint in class PrimitiveShape

Parameters:

v - the direction

Returns:

the point of the shape that is most in the direction of v

intersection

public boolean intersection(Circle circle)

Check intersection between two circles efficiently without using square roots. Will only produce wrong results originated in missing precision in floating point numbers.

Parameters:

circle - the circle to compare to

Returns:

true if the given circle intersects with this one

rayCast

public RayCastResult rayCast(org.joml.Vector2f start,
 org.joml.Vector2f rayDirection,
 float maxLength)

Calculate a raycast against this circle using absolute coordinates.

Parameters:

start - the starting point of the raycast

rayDirection - the direction of the ray, it doesnt have to be normalized, it will be by the method

maxLength - the max length of ray, if it can't hit within this range, it doesnt hit

Returns:

the result of the raycast