cs1.android

Class Triangle

java.lang.Object

cs1.android.Shape

cs1.android.Triangle

public class Triangle
extends Shape

Representation of a triangle drawn on the canvas.

Field Summary

Fields inherited from class cs1.android.Shape

DEFAULT_COLOR

Constructor Summary

Constructors

Constructor and Description
Triangle(double x1, double y1, double x2, double y2, double x3, double y3) Creates a triangle with the given vertex coordinates.
Triangle(Point p, Point q, Point r) Creates a triangle with the given vertex points..

Method Summary

Methods

Modifier and Type	Method and Description
boolean	contains(Point point) Determines if this triangle contains the given point.
void	draw(android.graphics.Canvas canvas) Draws this triangle on the given canvas.
Point	getCenter() Returns the center of this triangle.
Point	getP1() Returns the first vertex of this triangle.
Point	getP2() Returns the second vertex of this triangle.
Point	getP3() Returns the third vertex of this triangle.
void	move(double dx, double dy) Moves this triangle by the given displacement.

Methods inherited from class cs1.android.Shape

distance_squared, distance, draw, erase, getColor, getLabel, setColor, setColor, setLabel

Methods inherited from class java.lang.Object

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

Constructor Detail

Triangle

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

Creates a triangle with the given vertex coordinates.

Parameters:

x1 - the x-coordinate of the first vertex

y1 - the y-coordinate of the first vertex

x2 - the x-coordinate of the second vertex

y2 - the y-coordinate of the second vertex

x3 - the x-coordinate of the third vertex

y3 - the y-coordinate of the third vertex

Triangle

public Triangle(Point p,
        Point q,
        Point r)

Creates a triangle with the given vertex points..

Parameters:

p - the point of the first vertex

q - the point of the second vertex

r - the point of the third vertex

Method Detail

contains

public boolean contains(Point point)

Determines if this triangle contains the given point.

Specified by:

contains in class Shape

Parameters:

point - the point to check for containment

Returns:

true if this triangle contains the given point

draw

public void draw(android.graphics.Canvas canvas)

Draws this triangle on the given canvas. Should not be used directly.

Specified by:

draw in class Shape

Parameters:

canvas - the canvas in which to draw this triangle

getCenter

public Point getCenter()

Returns the center of this triangle.

Specified by:

getCenter in class Shape

Returns:

the center of this triangle

getP1

public Point getP1()

Returns the first vertex of this triangle.

Returns:

the first vertex of this triangle

getP2

public Point getP2()

Returns the second vertex of this triangle.

Returns:

the second vertex of this triangle

getP3

public Point getP3()

Returns the third vertex of this triangle.

Returns:

the third vertex of this triangle

move

public void move(double dx,
        double dy)

Moves this triangle by the given displacement.

Specified by:

move in class Shape

Parameters:

dx - the displacement in x

dy - the displacement in y