org.mini2Dx.core.geom

Class Triangle

java.lang.Object

org.mini2Dx.core.geom.Shape

org.mini2Dx.core.geom.Triangle

public class Triangle
extends Shape

Implements a triangle. Backed by a Polygon.

Constructor Summary

Constructors

Constructor and Description
Triangle(float x1, float y1, float x2, float y2, float x3, float y3) Constructor
Triangle(Triangle triangle) Constructs a Triangle as a copy of another
Triangle(com.badlogic.gdx.math.Vector2 v1, com.badlogic.gdx.math.Vector2 v2, com.badlogic.gdx.math.Vector2 v3) Constructor

Method Summary

Modifier and Type	Method and Description
boolean	contains(float x, float y) Returns if a set of coordinates are contained inside this Shape
boolean	contains(Shape shape) Returns if a Shape is contained inside this Shape
boolean	contains(com.badlogic.gdx.math.Vector2 vector2) Returns if a Vector2 is contained inside this Shape
Shape	copy() Returns an exact copy of this Shape
void	draw(Graphics g) Draws this shape using a Graphics instance
EdgeIterator	edgeIterator() Returns an EdgeIterator for looping over the edges of this Shape
void	fill(Graphics g) Fills this shape using a Graphics instance
float	getCenterX() Returns the center x coordinate of this object.
float	getCenterY() Returns the center y coordinate of this object.
float	getDistanceTo(float x, float y) Returns the distance from this Shape to a set of coordinates
float	getMaxX() Returns the right-most x coordinate
float	getMaxY() Returns the bottom-most y coordinate
float	getMinX() Returns the left-most x coordinate
float	getMinY() Returns the top-most y coordinate
int	getNumberOfSides() Returns the number of edges of this object
Polygon	getPolygon() Returns the Polygon representing this Shape
float	getRotation() Returns the rotation of this Shape
float	getX() Returns the x coordinate of this object
float	getY() Returns the y coordinate of this object
boolean	intersects(LineSegment lineSegment) Returns if this Shape intersects the specified LineSegment
boolean	intersects(Polygon polygon) Returns if this Triangle intersects a Polygon
boolean	intersects(Rectangle rectangle) Returns if the specified Rectangle intersects this Triangle
boolean	intersects(Shape shape) Returns if this Shape intersects another Shape
boolean	intersects(Triangle triangle) Returns if this Triangle intersects another Triangle
boolean	intersectsLineSegment(float x1, float y1, float x2, float y2) Returns if this Shape intersects a line segment
boolean	intersectsLineSegment(com.badlogic.gdx.math.Vector2 pointA, com.badlogic.gdx.math.Vector2 pointB) Returns if this Shape intersects a line segment
boolean	isCircle() Returns if this Shape is a Circle
void	rotate(float degrees) Rotates this Shape by a specified amount of degrees with its first point as the origin
void	rotateAround(float centerX, float centerY, float degrees) Rotates this Shape by a specified amount of degrees around a specified point
void	scale(float scale) Scales the radius of this shape.
void	set(float x, float y) Sets the x and y coordinate of this object
void	setPosition(float x1, float y1, float x2, float y2, float x3, float y3)
void	setRadius(float radius) Sets the radius of this shape.
void	setRotation(float degrees) Sets the rotation of this Shape with its first point as the origin
void	setRotationAround(float centerX, float centerY, float degrees) Sets the rotation of this Shape with a specified point as the origin
void	setX(float x) Sets the x coordinate of this object
void	setY(float y) Sets the y coordinate of this object
void	translate(float translateX, float translateY) Translates the x and y coordinate of this object

Methods inherited from class org.mini2Dx.core.geom.Shape

add, getDistanceTo, subtract

Methods inherited from class java.lang.Object

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

Constructor Detail

Triangle

public Triangle(com.badlogic.gdx.math.Vector2 v1,
                com.badlogic.gdx.math.Vector2 v2,
                com.badlogic.gdx.math.Vector2 v3)

Constructor

Parameters:

v1 - The first point in the Triangle

v2 - The second point in the Triangle

v3 - The third point in the Triangle

Triangle

public Triangle(float x1,
                float y1,
                float x2,
                float y2,
                float x3,
                float y3)

Constructor

Parameters:

x1 - The first x coordinate in the Triangle

y1 - The first y coordinate in the Triangle

x2 - The second x coordinate in the Triangle

y2 - The second y coordinate in the Triangle

x3 - The third x coordinate in the Triangle

y3 - The third y coordinate in the Triangle

Triangle

public Triangle(Triangle triangle)

Constructs a Triangle as a copy of another

Parameters:

triangle - The Triangle to copy

Method Detail

copy

public Shape copy()

Description copied from class: Shape

Returns an exact copy of this Shape

Specified by:

copy in class Shape

Returns:

A copy (new) instance of this Shape

contains

public boolean contains(float x,
                        float y)

Description copied from class: Shape

Returns if a set of coordinates are contained inside this Shape

Specified by:

contains in class Shape

Parameters:

x - The x coordinate to check

y - The y coordinate to check

Returns:

True if this Shape contains the specified coordinates

contains

public boolean contains(com.badlogic.gdx.math.Vector2 vector2)

Description copied from class: Shape

Returns if a Vector2 is contained inside this Shape

Specified by:

contains in class Shape

Parameters:

vector2 - The Vector2 to check

Returns:

True if this Shape contains the specified Vector2

contains

public boolean contains(Shape shape)

Description copied from class: Shape

Returns if a Shape is contained inside this Shape

Specified by:

contains in class Shape

Parameters:

shape - The Shape to check

Returns:

True if this Shape contains the specified Shape

intersects

public boolean intersects(Shape shape)

Description copied from class: Shape

Returns if this Shape intersects another Shape

Specified by:

intersects in class Shape

Parameters:

shape - The Shape to check

Returns:

True if this Shape intersects the specified Shape

intersects

public boolean intersects(LineSegment lineSegment)

Description copied from class: Shape

Returns if this Shape intersects the specified LineSegment

Overrides:

intersects in class Shape

Parameters:

lineSegment - The LineSegment to check

Returns:

True if this Shape intersects the LineSegment

intersectsLineSegment

public boolean intersectsLineSegment(com.badlogic.gdx.math.Vector2 pointA,
                                     com.badlogic.gdx.math.Vector2 pointB)

Description copied from class: Shape

Returns if this Shape intersects a line segment

Specified by:

intersectsLineSegment in class Shape

Parameters:

pointA - The first point in the line segment

pointB - The second point in the line segment

Returns:

True if this Shape intersects the line segment

intersectsLineSegment

public boolean intersectsLineSegment(float x1,
                                     float y1,
                                     float x2,
                                     float y2)

Description copied from class: Shape

Returns if this Shape intersects a line segment

Specified by:

intersectsLineSegment in class Shape

Parameters:

x1 - The x coordinate of the first point

y1 - The y coordinate of the first point

x2 - The x coordinate of the second point

y2 - The y coordinate of the second point

Returns:

True if this Shape intersects the line segment

intersects

public boolean intersects(Polygon polygon)

Returns if this Triangle intersects a Polygon

Parameters:

polygon - The Polygon to check

Returns:

True if this Triangle and Polygon intersect

intersects

public boolean intersects(Triangle triangle)

Returns if this Triangle intersects another Triangle

Parameters:

triangle - The Triangle to check

Returns:

True if both Triangles intersect

intersects

public boolean intersects(Rectangle rectangle)

Returns if the specified Rectangle intersects this Triangle

Parameters:

rectangle - The Rectangle to check

Returns:

True if this Triangle and Rectangle intersect

translate

public void translate(float translateX,
                      float translateY)

Description copied from class: Shape

Translates the x and y coordinate of this object

Specified by:

translate in class Shape

Parameters:

translateX - The x translation amount

translateY - The y translation amount

setRotation

public void setRotation(float degrees)

Description copied from class: Shape

Sets the rotation of this Shape with its first point as the origin

Specified by:

setRotation in class Shape

Parameters:

degrees - The rotation in degrees

rotate

public void rotate(float degrees)

Description copied from class: Shape

Rotates this Shape by a specified amount of degrees with its first point as the origin

Specified by:

rotate in class Shape

Parameters:

degrees - The rotation in degrees

getNumberOfSides

public int getNumberOfSides()

Description copied from class: Shape

Returns the number of edges of this object

Specified by:

getNumberOfSides in class Shape

Returns:

The number of sides/edges

draw

public void draw(Graphics g)

Description copied from class: Shape

Draws this shape using a Graphics instance

Specified by:

draw in class Shape

Parameters:

g - The Graphics context to render with

fill

public void fill(Graphics g)

Description copied from class: Shape

Fills this shape using a Graphics instance

Specified by:

fill in class Shape

Parameters:

g - The Graphics context to render with

getDistanceTo

public float getDistanceTo(float x,
                           float y)

Description copied from class: Shape

Returns the distance from this Shape to a set of coordinates

Specified by:

getDistanceTo in class Shape

Parameters:

x - The x coordinate

y - The y coordinate

Returns:

The distance

getRotation

public float getRotation()

Description copied from class: Shape

Returns the rotation of this Shape

Specified by:

getRotation in class Shape

Returns:

The rotation in degrees

setRotationAround

public void setRotationAround(float centerX,
                              float centerY,
                              float degrees)

Description copied from class: Shape

Sets the rotation of this Shape with a specified point as the origin

Specified by:

setRotationAround in class Shape

Parameters:

centerX - The origin/center x coordinate

centerY - The origin/center y coordinate

degrees - The rotation in degrees

rotateAround

public void rotateAround(float centerX,
                         float centerY,
                         float degrees)

Description copied from class: Shape

Rotates this Shape by a specified amount of degrees around a specified point

Specified by:

rotateAround in class Shape

Parameters:

centerX - The origin/center x coordinate

centerY - The origin/center y coordinate

degrees - The rotation in degrees

getX

public float getX()

Description copied from class: Shape

Returns the x coordinate of this object

Specified by:

getX in class Shape

Returns:

0 by default

setX

public void setX(float x)

Description copied from class: Shape

Sets the x coordinate of this object

Specified by:

setX in class Shape

Parameters:

x - The x coordinate

getY

public float getY()

Description copied from class: Shape

Returns the y coordinate of this object

Specified by:

getY in class Shape

Returns:

0 by default

setY

public void setY(float y)

Description copied from class: Shape

Sets the y coordinate of this object

Specified by:

setY in class Shape

Parameters:

y - The y coordinate

set

public void set(float x,
                float y)

Description copied from class: Shape

Sets the x and y coordinate of this object

Specified by:

set in class Shape

Parameters:

x - The x coordinate

y - The y coordinate

setPosition

public void setPosition(float x1,
                        float y1,
                        float x2,
                        float y2,
                        float x3,
                        float y3)

getMinX

public float getMinX()

Description copied from class: Shape

Returns the left-most x coordinate

Specified by:

getMinX in class Shape

Returns:

getMinY

public float getMinY()

Description copied from class: Shape

Returns the top-most y coordinate

Specified by:

getMinY in class Shape

Returns:

getMaxX

public float getMaxX()

Description copied from class: Shape

Returns the right-most x coordinate

Specified by:

getMaxX in class Shape

Returns:

getMaxY

public float getMaxY()

Description copied from class: Shape

Returns the bottom-most y coordinate

Specified by:

getMaxY in class Shape

Returns:

getCenterX

public float getCenterX()

Description copied from class: Shape

Returns the center x coordinate of this object. Note for Circle this is the same as x.

Specified by:

getCenterX in class Shape

Returns:

0 by default

getCenterY

public float getCenterY()

Description copied from class: Shape

Returns the center y coordinate of this object. Note for Circle this is the same as y.

Specified by:

getCenterY in class Shape

Returns:

0 by default

setRadius

public void setRadius(float radius)

Description copied from class: Shape

Sets the radius of this shape. For Polygon shapes, this will stretch in/out the shape from its center. Note that Polygons must be equilateral.

Specified by:

setRadius in class Shape

Parameters:

radius - The radius in pixels

edgeIterator

public EdgeIterator edgeIterator()

Description copied from class: Shape

Returns an EdgeIterator for looping over the edges of this Shape

Specified by:

edgeIterator in class Shape

Returns:

The EdgeIterator

isCircle

public boolean isCircle()

Description copied from class: Shape

Returns if this Shape is a Circle

Specified by:

isCircle in class Shape

Returns:

True if this Shape is a Circle

getPolygon

public Polygon getPolygon()

Description copied from class: Shape

Returns the Polygon representing this Shape

Specified by:

getPolygon in class Shape

Returns:

Null if this Shape is a Circle

scale

public void scale(float scale)

Description copied from class: Shape

Scales the radius of this shape. For Polygon shapes, this will stretch in/out the shape from its center. Note that Polygons must be equilateral.

Specified by:

scale in class Shape

Parameters:

scale - The amount to scale by (e.g. 2.0 = double the size)