Ball

extends OvalShape

java.lang.Object
↳	sofia.graphics.Shape
	↳	sofia.graphics.StrokedShape
		↳	sofia.graphics.FillableShape
			↳	sofia.graphics.OvalShape
				↳	sofia.demos.pong.Ball

Class Overview

The ball in the Pong game.

Summary

Public Constructors
	Ball() Creates a new Ball.

Public Methods
void	onCollisionWith(ViewEdges on) Called when the ball collides with one or more of the edges of the view.
void	onCollisionWith(Paddle paddle) Called when the ball has collided with a paddle to cause it to bounce off (by inverting its horizontal velocity) and restarting the animation.
void	reset() Resets the ball: centers it on the screen, gives it a random initial velocity, and after 0.5 seconds, starts it moving.

[Expand]

Inherited Methods

From class sofia.graphics.OvalShape

From class sofia.graphics.FillableShape

Animator<?>	animate(long duration) Gets an animator object that lets the user animate properties of the receiving shape.
void	drawBitmap(Canvas canvas)
int	getAlpha() A convenience method that gets the alpha (opacity) component of the shape's color.
Color	getFillColor() Gets the color used to fill the shape.
Paint	getFillPaint() Gets a `Paint` used to fill the shape.
Image	getImage()
Paint	getImagePaint()
boolean	isFilled() Gets a value indicating whether the shape will be filled when it is drawn.
void	setAlpha(int newAlpha) A convenience method that sets the alpha (opacity) component of the shape's color and fill color without changing the other color components.
void	setFillColor(Color newFillColor) Sets the color used to fill the shape.
void	setFilled(boolean newFilled) Sets a value indicating whether the shape will be filled when it is drawn.
void	setImage(Image newImage)
void	setImage(String imageName)

From class sofia.graphics.StrokedShape

Animator<?>	animate(long duration) Gets an animator object that lets the user animate properties of the receiving shape.
Paint	getPaint() Gets the `Paint` object that describes how this shape should be drawn.
Paint.Cap	getStrokeCap() Gets the stroke's cap, which determines how to treat the beginning and end of the stroke.
Paint.Join	getStrokeJoin() Gets the stroke's join type.
double	getStrokeMiter() Gets the stroke's miter value, which is used to control the behavior of miter joins when the join angle is sharp.
double	getStrokeWidth() Gets the width of the stroke.
void	setStrokeCap(Paint.Cap newStrokeCap) Sets the stroke's cap, which determines how to treat the beginning and end of the stroke.
void	setStrokeJoin(Paint.Join newStrokeJoin) Sets the stroke's join type.
void	setStrokeMiter(double newStrokeMiter) Sets the stroke's miter value, which is used to control the behavior of miter joins when the join angle is sharp.
void	setStrokeWidth(double newStrokeWidth) Sets the width of the stroke.

From class sofia.graphics.Shape

void	addFixtureForShape(Shape b2Shape) This method should only be called internally from within #createFixtures(Body) in order to create fixtures for the shape and add them to the shape's internal list of fixtures.
void	addOther(Shape newShape) Add another shape to the same view (or composite shape) containing this shape.
Animator<?>	animate(long duration) Gets an animator object that lets the user animate properties of the receiving shape.
void	applyLinearImpulse(float x, float y) TODO document
void	conditionallyRepaint() Called to indicate that the shape needs to be repainted on the screen.
boolean	contains(PointF point) Gets a value indicating whether the specified pixel location is contained in the receiver.
boolean	contains(float x, float y) Gets a value indicating whether the specified pixel location is contained in the receiver.
abstract void	createFixtures() This method is intended for internal use only, or by advanced users subclassing one of the abstract shape types.
void	destroyFixtures() Destroys the fixtures associated with this shape.
abstract void	draw(Canvas canvas) Subclasses must implement this method to define how the shape is to be drawn on the canvas.
ViewEdges	extendsOutside(RectF bounds) Determine whether any part of this shape extends outside the given rectangle.
int	getAlpha() A convenience method that gets the alpha (opacity) component of the shape's color.
float	getAngularDamping() Gets the angular damping of the shape, which is used to reduce the angular velocity of the shape.
float	getAngularVelocity() Gets the angular velocity of the shape, in degrees per second.
Body	getB2Body() For advanced usage only.
BodyDef	getB2BodyDef() For advanced usage only.
abstract RectF	getBounds() Gets the bounding rectangle of the shape.
Color	getColor() Gets the color of the receiver.
float	getDensity() Gets the density of the shape.
float	getFriction() Gets the coefficient of friction for the shape.
float	getGravityScale() Gets the gravity scaling factory for this shape.
float	getHeight() Gets the height of the shape, in pixels.
float	getLeft() Gets the x-coordinate of the anchor point of the shape's bounding box (the top-left corner, by default).
float	getLinearDamping() Gets the linear damping of the shape, which is used to reduce the linear velocity of the shape.
PointF	getLinearVelocity() Gets the linear velocity of the center of mass of the shape, in units per second.
float	getMass() Gets the mass of this shape (which is the density of the shape multiplied by its surface area).
Paint	getPaint() Gets the `Paint` object that describes how this shape should be drawn.
final ShapeView	getParentView() Gets the parent of the receiver.
PointF	getPosition() Gets the location of the centroid of the shape.
PointF	getPositionAnchor() Get the current position anchor, which is an offset relative to the upper left corner of the shape that is used as the shape's "origin" for the purposes of getting/setting x-y positions.
float	getRestitution() Gets the coefficient of restitution, which controls the "bounciness" of the shape (or in more precise terms, the relationship between the velocity of the shape before and after a collision).
float	getRotation() Gets the current angle of rotation of the shape, in degrees clockwise.
final ShapeField	getShapeField() Gets the ShapeField that contains this shape.
ShapeMotion	getShapeMotion() Gets a value indicating how this shape acts with regard to motion in the physical world.
float	getTop() Gets the y-coordinate of the anchor point of the shape's bounding box (the top-left corner, by default).
Matrix	getTransform() Gets the current linear transformation that will be applied to the shape when it is drawn.
float	getWidth() Gets the width of the shape, in pixels.
float	getX()
float	getY()
int	getZIndex() Gets the z-index of the receiver.
boolean	intersects(Shape otherShape) Determine whether this shape intersects another, based on their bounding boxes.
float[]	inverseTransformPoint(float x, float y) Transforms a point on the screen into the original bounds of a shape, pre-rotation.
boolean	isActive() Gets a value indicating whether or not the shape is active.
boolean	isAwake() Gets a value indicating whether or not the shape is awake.
boolean	isBullet() Gets a value indicating whether this shape is a "bullet." Bullets are very fast moving objects that require more precise contact/collision handling than ordinary objects, and they require more processing power as a result.
boolean	isFixedRotation() Gets a value indicating whether this shape's rotation is fixed -- that is, even under a physical load, the shape will never rotate.
boolean	isInFrontOf(Shape other) Returns true if this shape is drawn in front of (later than) the other shape.
boolean	isSensor() Gets a value indicating whether or not the shape is a sensor.
boolean	isVisible() Gets a value indicating whether the receiver is visible (drawn on the screen).
void	moveBy(float dx, float dy) Sets the position of the receiver based on the specified point and anchor, leaving its size unchanged.
void	notifyParentOfPositionChange() Called to recalculate the layout of the shape on the screen.
void	onBoundsResolved() Called when the bounds of the shape have been resolved.
void	recreateFixtures() Destroys and recreates the shape's fixtures.
void	remove() Remove this shape from its view (or parent).
void	rotateBy(float angleDelta) Increments the shape's rotation by the specified number of degrees, around the same pivot point that was used previously (or the center of the shape if no other pivot has been previously used).
void	setActive(boolean isActive) Sets a value indicating whether or not the shape is active.
void	setAlpha(int newAlpha) A convenience method that sets the alpha (opacity) component of the shape's color without changing the other color components.
void	setAngularDamping(float newDamping) Sets the angular damping of the shape, which is used to reduce the angular velocity of the shape.
void	setAngularVelocity(float newVelocity) Sets the angular velocity of the shape, in degrees per second.
abstract void	setBounds(RectF newBounds) Sets the bounding rectangle of the shape.
void	setBullet(boolean bullet) Sets a value indicating whether this shape is a "bullet." Bullets are very fast moving objects that require more precise contact/collision handling than ordinary objects, and they require more processing power as a result.
void	setColor(Color newColor) Sets the color of the receiver.
void	setDensity(float newDensity) Sets the density of the shape.
void	setFixedRotation(boolean fixedRotation) Sets a value indicating whether this shape's rotation is fixed -- that is, even under a physical load, the shape will never rotate.
void	setFriction(float newFriction) Set the coefficient of friction for the shape.
void	setGravityScale(float gravityScale) Sets the gravity scaling factor for the shape.
void	setLeft(float x) Sets the x-coordinate of the anchor point of the shape's bounding box (the top-left corner, by default).
void	setLinearDamping(float newDamping) Sets the linear damping of the shape, which is used to reduce the linear velocity of the shape.
void	setLinearVelocity(PointF newVelocity) Sets the linear velocity of the center of mass of the shape, in units per second.
void	setLinearVelocity(float xVelocity, float yVelocity) Sets the linear velocity of the center of mass of the shape, in units per second.
void	setPosition(PointF position) Sets the location of the centroid of the shape.
void	setPosition(float x, float y) Sets the location of the centroid of the shape.
void	setPositionAnchor(Anchor anchor) Set the position anchor, which is an offset relative to the upper left corner of the shape that is used as the shape's "origin" for the purposes of getting/setting x-y positions.
void	setPositionAnchor(PointF anchor) Set the position anchor, which is an offset relative to the upper left corner of the shape that is used as the shape's "origin" for the purposes of getting/setting x-y positions.
void	setRestitution(float newRestitution) Sets the coefficient of restitution, which controls the "bounciness" of the shape (or in more precise terms, the relationship between the velocity of the shape before and after a collision).
void	setRotation(float newRotation) Sets the angle of rotation of the shape in degrees clockwise, using the center of the shape's bounding box as the pivot point.
void	setSensor(boolean isSensor) Gets a value indicating whether or not the shape is a sensor.
void	setShapeMotion(ShapeMotion motion) Sets a value indicating how this shape acts with regard to motion in the physical world.
void	setTop(float y) Sets the y-coordinate of the anchor point of the shape's bounding box (the top-left corner, by default).
void	setVisible(boolean newVisible) Sets a value indicating whether the receiver is visible (drawn on the screen).
void	setZIndex(int newZIndex) Sets the z-index of the receiver.
void	stopAnimation() Stops the current animation for this shape, if there is one.
String	toString() Returns a human-readable string representation of the shape.
void	updateTransform(float x, float y, float angle) TODO document
void	updateTransform(float x, float y) TODO document
void	updateTransform(float angle) TODO document

From class java.lang.Object

Public Constructors

public Ball ()

Creates a new Ball.

Public Methods

public void onCollisionWith (ViewEdges on)

Called when the ball collides with one or more of the edges of the view.

Parameters

on	The edges "on" which the ball has touched.

public void onCollisionWith (Paddle paddle)

Called when the ball has collided with a paddle to cause it to bounce off (by inverting its horizontal velocity) and restarting the animation.

Parameters

paddle	The object we collided with.

public void reset ()

Resets the ball: centers it on the screen, gives it a random initial velocity, and after 0.5 seconds, starts it moving.

Classes

Ball

Class Overview

Summary

Public Constructors

public Ball ()

Public Methods

public void onCollisionWith (ViewEdges on)

Parameters

public void onCollisionWith (Paddle paddle)

Parameters

public void reset ()