ECM2410: Graphics and Animation

Java 2D

Java 2D 1/17

Java 2D Basics

Device

Output is to a FrameFrame is the ‘window’ of window managers andMicrosoft.Output can also be drawn to a Component, JComponent,etc or an image.

paint()

Each object to be drawn has a paint() method, which iscalled to draw the object.

Simple

In simple programs all work is done by a single paint().

Basics Java 2D 2/17

Java 2D Basics

Device

Output is to a FrameFrame is the ‘window’ of window managers andMicrosoft.Output can also be drawn to a Component, JComponent,etc or an image.

paint()

Each object to be drawn has a paint() method, which iscalled to draw the object.

Simple

In simple programs all work is done by a single paint().

Basics Java 2D 2/17

Java 2D Basics

Device

Output is to a FrameFrame is the ‘window’ of window managers andMicrosoft.Output can also be drawn to a Component, JComponent,etc or an image.

paint()

Each object to be drawn has a paint() method, which iscalled to draw the object.

Simple

In simple programs all work is done by a single paint().

Basics Java 2D 2/17

Java 2D Basics

Device

Output is to a FrameFrame is the ‘window’ of window managers andMicrosoft.Output can also be drawn to a Component, JComponent,etc or an image.

paint()

Each object to be drawn has a paint() method, which iscalled to draw the object.

Simple

In simple programs all work is done by a single paint().

Basics Java 2D 2/17

Java 2D Basics

Device

Output is to a FrameFrame is the ‘window’ of window managers andMicrosoft.Output can also be drawn to a Component, JComponent,etc or an image.

paint()

Each object to be drawn has a paint() method, which iscalled to draw the object.

Simple

In simple programs all work is done by a single paint().

Basics Java 2D 2/17

Java 2D Basics

Device

Output is to a FrameFrame is the ‘window’ of window managers andMicrosoft.Output can also be drawn to a Component, JComponent,etc or an image.

paint()

Each object to be drawn has a paint() method, which iscalled to draw the object.

Simple

In simple programs all work is done by a single paint().

Basics Java 2D 2/17

Java 2D Basics

Device

Output is to a FrameFrame is the ‘window’ of window managers andMicrosoft.Output can also be drawn to a Component, JComponent,etc or an image.

paint()

Each object to be drawn has a paint() method, which iscalled to draw the object.

Simple

In simple programs all work is done by a single paint().

Basics Java 2D 2/17

Java 2D Basics

Device

Output is to a FrameFrame is the ‘window’ of window managers andMicrosoft.Output can also be drawn to a Component, JComponent,etc or an image.

paint()

Each object to be drawn has a paint() method, which iscalled to draw the object.

Simple

In simple programs all work is done by a single paint().

Basics Java 2D 2/17

Java 2D Basics

Device

Output is to a FrameFrame is the ‘window’ of window managers andMicrosoft.Output can also be drawn to a Component, JComponent,etc or an image.

paint()

Each object to be drawn has a paint() method, which iscalled to draw the object.

Simple

In simple programs all work is done by a single paint().

Basics Java 2D 2/17

Object Hierarchy

java.lang.Object.Object

java.lang.awt.Component Abstract super-class – implementedby buttons, scrollbars, canvases etc

java.lang.awt.Container Holds Components

java.lang.awt.Window No borders, menubars.Also JComponent

java.lang.awt.Frame Title and borderjava.lang.awt.Frame.paint()

Invoked to redraw Component

Components/Containers receive events from window manager

Sub-class paint() methods invoked to redraw Component

Basics Java 2D 3/17

Object Hierarchy

java.lang.Object.Object

java.lang.awt.Component Abstract super-class – implementedby buttons, scrollbars, canvases etc

java.lang.awt.Container Holds Components

java.lang.awt.Window No borders, menubars.Also JComponent

java.lang.awt.Frame Title and borderjava.lang.awt.Frame.paint()

Invoked to redraw Component

Components/Containers receive events from window manager

Sub-class paint() methods invoked to redraw Component

Basics Java 2D 3/17

Object Hierarchy

java.lang.Object.Object

java.lang.awt.Component Abstract super-class – implementedby buttons, scrollbars, canvases etc

java.lang.awt.Container Holds Components

java.lang.awt.Window No borders, menubars.Also JComponent

java.lang.awt.Frame Title and borderjava.lang.awt.Frame.paint()

Invoked to redraw Component

Components/Containers receive events from window manager

Sub-class paint() methods invoked to redraw Component

Basics Java 2D 3/17

Object Hierarchy

java.lang.Object.Object

java.lang.awt.Component Abstract super-class – implementedby buttons, scrollbars, canvases etc

java.lang.awt.Container Holds Components

java.lang.awt.Window No borders, menubars.Also JComponent

java.lang.awt.Frame Title and borderjava.lang.awt.Frame.paint()

Invoked to redraw Component

Components/Containers receive events from window manager

Sub-class paint() methods invoked to redraw Component

Basics Java 2D 3/17

Object Hierarchy

java.lang.Object.Object

java.lang.awt.Component Abstract super-class – implementedby buttons, scrollbars, canvases etc

java.lang.awt.Container Holds Components

java.lang.awt.Window No borders, menubars.Also JComponent

java.lang.awt.Frame Title and borderjava.lang.awt.Frame.paint()

Invoked to redraw Component

Components/Containers receive events from window manager

Sub-class paint() methods invoked to redraw Component

Basics Java 2D 3/17

Object Hierarchy

java.lang.Object.Object

java.lang.awt.Component Abstract super-class – implementedby buttons, scrollbars, canvases etc

java.lang.awt.Container Holds Components

java.lang.awt.Window No borders, menubars.Also JComponent

java.lang.awt.Frame Title and borderjava.lang.awt.Frame.paint()

Invoked to redraw Component

Components/Containers receive events from window manager

Sub-class paint() methods invoked to redraw Component

Basics Java 2D 3/17

Object Hierarchy

java.lang.Object.Object

java.lang.awt.Component Abstract super-class – implementedby buttons, scrollbars, canvases etc

java.lang.awt.Container Holds Components

java.lang.awt.Window No borders, menubars.Also JComponent

java.lang.awt.Frame Title and borderjava.lang.awt.Frame.paint()

Invoked to redraw Component

Components/Containers receive events from window manager

Sub-class paint() methods invoked to redraw Component

Basics Java 2D 3/17

Object Hierarchy

java.lang.Object.Object

java.lang.awt.Component Abstract super-class – implementedby buttons, scrollbars, canvases etc

java.lang.awt.Container Holds Components

java.lang.awt.Window No borders, menubars.Also JComponent

java.lang.awt.Frame Title and borderjava.lang.awt.Frame.paint()

Invoked to redraw Component

Components/Containers receive events from window manager

Sub-class paint() methods invoked to redraw Component

Basics Java 2D 3/17

Object Hierarchy

java.lang.Object.Object

java.lang.awt.Component Abstract super-class – implementedby buttons, scrollbars, canvases etc

java.lang.awt.Container Holds Components

java.lang.awt.Window No borders, menubars.Also JComponent

java.lang.awt.Frame Title and borderjava.lang.awt.Frame.paint()

Invoked to redraw Component

Components/Containers receive events from window manager

Sub-class paint() methods invoked to redraw Component

Basics Java 2D 3/17

Object Hierarchy

java.lang.Object.Object

java.lang.awt.Component Abstract super-class – implementedby buttons, scrollbars, canvases etc

java.lang.awt.Container Holds Components

java.lang.awt.Window No borders, menubars.Also JComponent

java.lang.awt.Frame Title and borderjava.lang.awt.Frame.paint()

Invoked to redraw Component

Components/Containers receive events from window manager

Sub-class paint() methods invoked to redraw Component

Basics Java 2D 3/17

String Art Exeter.java

import java.awt.*;import java.awt.geom.*;

public class StringArtExeter extends ApplicationFrame {public StringArtExeter () {

super("StringArtExeter"); // Name in titlebarsetSize(600, 600); // Frame size, in pixelscenter(); // Centre of desktopsetVisible(true);

}

public void paint(Graphics g) {// Work done here

}

public static void main(String[] args) {new StringArtExeter();

}}

Basics Java 2D 4/17

String Art Exeter.java

import java.awt.*;import java.awt.geom.*;

public class StringArtExeter extends ApplicationFrame {public StringArtExeter () {

super("StringArtExeter"); // Name in titlebarsetSize(600, 600); // Frame size, in pixelscenter(); // Centre of desktopsetVisible(true);

}

public void paint(Graphics g) {// Work done here

}

public static void main(String[] args) {new StringArtExeter();

}}

Basics Java 2D 4/17

String Art Exeter.java

import java.awt.*;import java.awt.geom.*;

public class StringArtExeter extends ApplicationFrame {public StringArtExeter () {

super("StringArtExeter"); // Name in titlebarsetSize(600, 600); // Frame size, in pixelscenter(); // Centre of desktopsetVisible(true);

}

public void paint(Graphics g) {// Work done here

}

public static void main(String[] args) {new StringArtExeter();

}}

Basics Java 2D 4/17

String Art Exeter.java

import java.awt.*;import java.awt.geom.*;

public class StringArtExeter extends ApplicationFrame {public StringArtExeter () {

super("StringArtExeter"); // Name in titlebarsetSize(600, 600); // Frame size, in pixelscenter(); // Centre of desktopsetVisible(true);

}

public void paint(Graphics g) {// Work done here

}

public static void main(String[] args) {new StringArtExeter();

}}

Basics Java 2D 4/17

String Art Exeter.java

import java.awt.*;import java.awt.geom.*;

public class StringArtExeter extends ApplicationFrame {public StringArtExeter () {

super("StringArtExeter"); // Name in titlebarsetSize(600, 600); // Frame size, in pixelscenter(); // Centre of desktopsetVisible(true);

}

public void paint(Graphics g) {// Work done here

}

public static void main(String[] args) {new StringArtExeter();

}}

Basics Java 2D 4/17

String Art Exeter.java

import java.awt.*;import java.awt.geom.*;

public class StringArtExeter extends ApplicationFrame {public StringArtExeter () {

super("StringArtExeter"); // Name in titlebarsetSize(600, 600); // Frame size, in pixelscenter(); // Centre of desktopsetVisible(true);

}

public void paint(Graphics g) {// Work done here

}

public static void main(String[] args) {new StringArtExeter();

}}

Basics Java 2D 4/17

Application Frame.java

Extends FrameSets up an application with user interface

Methodspublic ApplicationFrame(String title)Constructor, putting “title” in frame title-bar

public void center()Centre frame on desktop

System.exit() when frame closed.

Code under “Example Files” on ELE pageApplicationFramePrint – with printing interface

Basics Java 2D 5/17

Application Frame.java

Extends FrameSets up an application with user interface

Methodspublic ApplicationFrame(String title)Constructor, putting “title” in frame title-bar

public void center()Centre frame on desktop

System.exit() when frame closed.

Code under “Example Files” on ELE pageApplicationFramePrint – with printing interface

Basics Java 2D 5/17

Application Frame.java

Extends FrameSets up an application with user interface

Methodspublic ApplicationFrame(String title)Constructor, putting “title” in frame title-bar

public void center()Centre frame on desktop

System.exit() when frame closed.

Code under “Example Files” on ELE pageApplicationFramePrint – with printing interface

Basics Java 2D 5/17

Application Frame.java

Extends FrameSets up an application with user interface

Methodspublic ApplicationFrame(String title)Constructor, putting “title” in frame title-bar

public void center()Centre frame on desktop

System.exit() when frame closed.

Code under “Example Files” on ELE pageApplicationFramePrint – with printing interface

Basics Java 2D 5/17

Application Frame.java

Extends FrameSets up an application with user interface

Methodspublic ApplicationFrame(String title)Constructor, putting “title” in frame title-bar

public void center()Centre frame on desktop

System.exit() when frame closed.

Code under “Example Files” on ELE pageApplicationFramePrint – with printing interface

Basics Java 2D 5/17

Application Frame.java

Extends FrameSets up an application with user interface

Methodspublic ApplicationFrame(String title)Constructor, putting “title” in frame title-bar

public void center()Centre frame on desktop

System.exit() when frame closed.

Code under “Example Files” on ELE pageApplicationFramePrint – with printing interface

Basics Java 2D 5/17

Application Frame.java

Extends FrameSets up an application with user interface

Methodspublic ApplicationFrame(String title)Constructor, putting “title” in frame title-bar

public void center()Centre frame on desktop

System.exit() when frame closed.

Code under “Example Files” on ELE pageApplicationFramePrint – with printing interface

Basics Java 2D 5/17

Application Frame.java

Extends FrameSets up an application with user interface

Methodspublic ApplicationFrame(String title)Constructor, putting “title” in frame title-bar

public void center()Centre frame on desktop

System.exit() when frame closed.

Code under “Example Files” on ELE pageApplicationFramePrint – with printing interface

Basics Java 2D 5/17

Application Frame.java

Extends FrameSets up an application with user interface

Methodspublic ApplicationFrame(String title)Constructor, putting “title” in frame title-bar

public void center()Centre frame on desktop

System.exit() when frame closed.

Code under “Example Files” on ELE pageApplicationFramePrint – with printing interface

Basics Java 2D 5/17

Application Frame.java

Extends FrameSets up an application with user interface

Methodspublic ApplicationFrame(String title)Constructor, putting “title” in frame title-bar

public void center()Centre frame on desktop

System.exit() when frame closed.

Code under “Example Files” on ELE pageApplicationFramePrint – with printing interface

Basics Java 2D 5/17

Application Frame.java

Extends FrameSets up an application with user interface

Methodspublic ApplicationFrame(String title)Constructor, putting “title” in frame title-bar

public void center()Centre frame on desktop

System.exit() when frame closed.

Code under “Example Files” on ELE pageApplicationFramePrint – with printing interface

Basics Java 2D 5/17

String Art Exeter.java

private int mNumberOfLines = 25;private Color[] mColors = { Color.red, Color.green, Color.blue };

public void paint(Graphics g) {Graphics2D g2 = (Graphics2D)g; // Promote to Graphics2D context

System.out.println("Paint");Dimension d = getSize(); // Defined by Frame

for (int i = 0; i < mNumberOfLines; i++) {double ratio = (double)i / (double)mNumberOfLines;Line2D line = new Line2D.Double(

0, ratio * d.height,ratio * d.width, d.height);

g2.setPaint(mColors[i % mColors.length]);g2.draw(line);

}}

Basics Java 2D 6/17

String Art Exeter.java

private int mNumberOfLines = 25;private Color[] mColors = { Color.red, Color.green, Color.blue };

public void paint(Graphics g) {Graphics2D g2 = (Graphics2D)g; // Promote to Graphics2D context

System.out.println("Paint");Dimension d = getSize(); // Defined by Frame

for (int i = 0; i < mNumberOfLines; i++) {double ratio = (double)i / (double)mNumberOfLines;Line2D line = new Line2D.Double(

0, ratio * d.height,ratio * d.width, d.height);

g2.setPaint(mColors[i % mColors.length]);g2.draw(line);

}}

Basics Java 2D 6/17

String Art Exeter.java

private int mNumberOfLines = 25;private Color[] mColors = { Color.red, Color.green, Color.blue };

public void paint(Graphics g) {Graphics2D g2 = (Graphics2D)g; // Promote to Graphics2D context

System.out.println("Paint");Dimension d = getSize(); // Defined by Frame

for (int i = 0; i < mNumberOfLines; i++) {double ratio = (double)i / (double)mNumberOfLines;Line2D line = new Line2D.Double(

0, ratio * d.height,ratio * d.width, d.height);

g2.setPaint(mColors[i % mColors.length]);g2.draw(line);

}}

Basics Java 2D 6/17

String Art Exeter.java

private int mNumberOfLines = 25;private Color[] mColors = { Color.red, Color.green, Color.blue };

public void paint(Graphics g) {Graphics2D g2 = (Graphics2D)g; // Promote to Graphics2D context

System.out.println("Paint");Dimension d = getSize(); // Defined by Frame

for (int i = 0; i < mNumberOfLines; i++) {double ratio = (double)i / (double)mNumberOfLines;Line2D line = new Line2D.Double(

0, ratio * d.height,ratio * d.width, d.height);

g2.setPaint(mColors[i % mColors.length]);g2.draw(line);

}}

Basics Java 2D 6/17

String Art Exeter.java

private int mNumberOfLines = 25;private Color[] mColors = { Color.red, Color.green, Color.blue };

public void paint(Graphics g) {Graphics2D g2 = (Graphics2D)g; // Promote to Graphics2D context

System.out.println("Paint");Dimension d = getSize(); // Defined by Frame

for (int i = 0; i < mNumberOfLines; i++) {double ratio = (double)i / (double)mNumberOfLines;Line2D line = new Line2D.Double(

0, ratio * d.height,ratio * d.width, d.height);

g2.setPaint(mColors[i % mColors.length]);g2.draw(line);

}}

Basics Java 2D 6/17

String Art Exeter.java

private int mNumberOfLines = 25;private Color[] mColors = { Color.red, Color.green, Color.blue };

public void paint(Graphics g) {Graphics2D g2 = (Graphics2D)g; // Promote to Graphics2D context

System.out.println("Paint");Dimension d = getSize(); // Defined by Frame

for (int i = 0; i < mNumberOfLines; i++) {double ratio = (double)i / (double)mNumberOfLines;Line2D line = new Line2D.Double(

0, ratio * d.height,ratio * d.width, d.height);

g2.setPaint(mColors[i % mColors.length]);g2.draw(line);

}}

Basics Java 2D 6/17

String Art Exeter.java

private int mNumberOfLines = 25;private Color[] mColors = { Color.red, Color.green, Color.blue };

public void paint(Graphics g) {Graphics2D g2 = (Graphics2D)g; // Promote to Graphics2D context

System.out.println("Paint");Dimension d = getSize(); // Defined by Frame

for (int i = 0; i < mNumberOfLines; i++) {double ratio = (double)i / (double)mNumberOfLines;Line2D line = new Line2D.Double(

0, ratio * d.height,ratio * d.width, d.height);

g2.setPaint(mColors[i % mColors.length]);g2.draw(line);

}}

Basics Java 2D 6/17

The paint() Method

paint() is invoked whenever the Frame needs redrawingResize, redraw, expose eventsOccasionally invoked unnecessarily.

paint(Graphics g)

g is old graphics context; cast toGraphics2D

Device coordinate origin is at thetop left hand corner.X-axis horizontally.Y-axis vertically downwards.Frame is also occupied bywindow manager borders etcDefault transformation fromworld to device coordinates isthe identity

Basics Java 2D 7/17

The paint() Method

paint() is invoked whenever the Frame needs redrawingResize, redraw, expose eventsOccasionally invoked unnecessarily.

paint(Graphics g)

g is old graphics context; cast toGraphics2D

Device coordinate origin is at thetop left hand corner.X-axis horizontally.Y-axis vertically downwards.Frame is also occupied bywindow manager borders etcDefault transformation fromworld to device coordinates isthe identity

Basics Java 2D 7/17

The paint() Method

paint() is invoked whenever the Frame needs redrawingResize, redraw, expose eventsOccasionally invoked unnecessarily.

paint(Graphics g)

g is old graphics context; cast toGraphics2D

Device coordinate origin is at thetop left hand corner.X-axis horizontally.Y-axis vertically downwards.Frame is also occupied bywindow manager borders etcDefault transformation fromworld to device coordinates isthe identity

Basics Java 2D 7/17

The paint() Method

paint() is invoked whenever the Frame needs redrawingResize, redraw, expose eventsOccasionally invoked unnecessarily.

paint(Graphics g)

g is old graphics context; cast toGraphics2D

Device coordinate origin is at thetop left hand corner.X-axis horizontally.Y-axis vertically downwards.Frame is also occupied bywindow manager borders etcDefault transformation fromworld to device coordinates isthe identity

Basics Java 2D 7/17

The paint() Method

paint() is invoked whenever the Frame needs redrawingResize, redraw, expose eventsOccasionally invoked unnecessarily.

paint(Graphics g)

g is old graphics context; cast toGraphics2D

Device coordinate origin is at thetop left hand corner.X-axis horizontally.Y-axis vertically downwards.Frame is also occupied bywindow manager borders etcDefault transformation fromworld to device coordinates isthe identity

Basics Java 2D 7/17

The paint() Method

paint() is invoked whenever the Frame needs redrawingResize, redraw, expose eventsOccasionally invoked unnecessarily.

paint(Graphics g)

g is old graphics context; cast toGraphics2D

Device coordinate origin is at thetop left hand corner.X-axis horizontally.Y-axis vertically downwards.Frame is also occupied bywindow manager borders etcDefault transformation fromworld to device coordinates isthe identity

Basics Java 2D 7/17

The paint() Method

paint() is invoked whenever the Frame needs redrawingResize, redraw, expose eventsOccasionally invoked unnecessarily.

paint(Graphics g)

g is old graphics context; cast toGraphics2D

Device coordinate origin is at thetop left hand corner.X-axis horizontally.Y-axis vertically downwards.Frame is also occupied bywindow manager borders etcDefault transformation fromworld to device coordinates isthe identity

Basics Java 2D 7/17

The paint() Method

paint() is invoked whenever the Frame needs redrawingResize, redraw, expose eventsOccasionally invoked unnecessarily.

paint(Graphics g)

g is old graphics context; cast toGraphics2D

Device coordinate origin is at thetop left hand corner.X-axis horizontally.Y-axis vertically downwards.Frame is also occupied bywindow manager borders etcDefault transformation fromworld to device coordinates isthe identity

Basics Java 2D 7/17

The paint() Method

paint() is invoked whenever the Frame needs redrawingResize, redraw, expose eventsOccasionally invoked unnecessarily.

paint(Graphics g)

g is old graphics context; cast toGraphics2D

Device coordinate origin is at thetop left hand corner.X-axis horizontally.Y-axis vertically downwards.Frame is also occupied bywindow manager borders etcDefault transformation fromworld to device coordinates isthe identity

Basics Java 2D 7/17

The paint() Method

paint() is invoked whenever the Frame needs redrawingResize, redraw, expose eventsOccasionally invoked unnecessarily.

paint(Graphics g)

g is old graphics context; cast toGraphics2D

Device coordinate origin is at thetop left hand corner.X-axis horizontally.Y-axis vertically downwards.Frame is also occupied bywindow manager borders etcDefault transformation fromworld to device coordinates isthe identity

Basics Java 2D 7/17

Coordinates

Local Coordinates

Specify locations of primitives in objectArbitrary units (chosen by the modeller).

World Coordinates or User Coordinates.Specify locations of objects in sceneSpecify location of clipping windowUnits dependent on graphics API.Java2D: pixels.

Device Coordinates or Screen CoordinatesMeasured in pixels.

Single viewportOccupies the entire device space.

Basics Java 2D 8/17

Coordinates

Local Coordinates

Specify locations of primitives in objectArbitrary units (chosen by the modeller).

World Coordinates or User Coordinates.Specify locations of objects in sceneSpecify location of clipping windowUnits dependent on graphics API.Java2D: pixels.

Device Coordinates or Screen CoordinatesMeasured in pixels.

Single viewportOccupies the entire device space.

Basics Java 2D 8/17

Coordinates

Local Coordinates

Specify locations of primitives in objectArbitrary units (chosen by the modeller).

World Coordinates or User Coordinates.Specify locations of objects in sceneSpecify location of clipping windowUnits dependent on graphics API.Java2D: pixels.

Device Coordinates or Screen CoordinatesMeasured in pixels.

Single viewportOccupies the entire device space.

Basics Java 2D 8/17

Coordinates

Local Coordinates

Specify locations of primitives in objectArbitrary units (chosen by the modeller).

World Coordinates or User Coordinates.Specify locations of objects in sceneSpecify location of clipping windowUnits dependent on graphics API.Java2D: pixels.

Device Coordinates or Screen CoordinatesMeasured in pixels.

Single viewportOccupies the entire device space.

Basics Java 2D 8/17

Coordinates

Local Coordinates

Specify locations of primitives in objectArbitrary units (chosen by the modeller).

World Coordinates or User Coordinates.Specify locations of objects in sceneSpecify location of clipping windowUnits dependent on graphics API.Java2D: pixels.

Device Coordinates or Screen CoordinatesMeasured in pixels.

Single viewportOccupies the entire device space.

Basics Java 2D 8/17

Coordinates

Local Coordinates

Specify locations of primitives in objectArbitrary units (chosen by the modeller).

World Coordinates or User Coordinates.Specify locations of objects in sceneSpecify location of clipping windowUnits dependent on graphics API.Java2D: pixels.

Device Coordinates or Screen CoordinatesMeasured in pixels.

Single viewportOccupies the entire device space.

Basics Java 2D 8/17

Coordinates

Local Coordinates

Specify locations of primitives in objectArbitrary units (chosen by the modeller).

World Coordinates or User Coordinates.Specify locations of objects in sceneSpecify location of clipping windowUnits dependent on graphics API.Java2D: pixels.

Device Coordinates or Screen CoordinatesMeasured in pixels.

Single viewportOccupies the entire device space.

Basics Java 2D 8/17

Coordinates

Local Coordinates

Specify locations of primitives in objectArbitrary units (chosen by the modeller).

World Coordinates or User Coordinates.Specify locations of objects in sceneSpecify location of clipping windowUnits dependent on graphics API.Java2D: pixels.

Device Coordinates or Screen CoordinatesMeasured in pixels.

Single viewportOccupies the entire device space.

Basics Java 2D 8/17

Coordinates

Local Coordinates

Specify locations of primitives in objectArbitrary units (chosen by the modeller).

World Coordinates or User Coordinates.Specify locations of objects in sceneSpecify location of clipping windowUnits dependent on graphics API.Java2D: pixels.

Device Coordinates or Screen CoordinatesMeasured in pixels.

Single viewportOccupies the entire device space.

Basics Java 2D 8/17

Coordinates

Local Coordinates

Specify locations of primitives in objectArbitrary units (chosen by the modeller).

World Coordinates or User Coordinates.Specify locations of objects in sceneSpecify location of clipping windowUnits dependent on graphics API.Java2D: pixels.

Device Coordinates or Screen CoordinatesMeasured in pixels.

Single viewportOccupies the entire device space.

Basics Java 2D 8/17

Coordinates

Local Coordinates

Specify locations of primitives in objectArbitrary units (chosen by the modeller).

World Coordinates or User Coordinates.Specify locations of objects in sceneSpecify location of clipping windowUnits dependent on graphics API.Java2D: pixels.

Device Coordinates or Screen CoordinatesMeasured in pixels.

Single viewportOccupies the entire device space.

Basics Java 2D 8/17

Coordinates

Local Coordinates

Specify locations of primitives in objectArbitrary units (chosen by the modeller).

World Coordinates or User Coordinates.Specify locations of objects in sceneSpecify location of clipping windowUnits dependent on graphics API.Java2D: pixels.

Device Coordinates or Screen CoordinatesMeasured in pixels.

Single viewportOccupies the entire device space.

Basics Java 2D 8/17

Coordinates

Local Coordinates

Specify locations of primitives in objectArbitrary units (chosen by the modeller).

World Coordinates or User Coordinates.Specify locations of objects in sceneSpecify location of clipping windowUnits dependent on graphics API.Java2D: pixels.

Device Coordinates or Screen CoordinatesMeasured in pixels.

Single viewportOccupies the entire device space.

Basics Java 2D 8/17

String Art Exeter Add.java

import java.awt.*;import java.awt.geom.*;import javax.swing.*;

public class StringArtExeterAdd extends JComponent {public void paint(Graphics g) { . . . }

public static void main(String[] args) {ApplicationFrame f =

new ApplicationFrame("StringArtExeterAdd");

f.add(new StringArtExeterAdd()); // Add to the JComponentf.setSize(600, 600);f.center();f.setVisible(true);

}}

Basics Java 2D 9/17

String Art Exeter Add.java

import java.awt.*;import java.awt.geom.*;import javax.swing.*;

public class StringArtExeterAdd extends JComponent {public void paint(Graphics g) { . . . }

public static void main(String[] args) {ApplicationFrame f =

new ApplicationFrame("StringArtExeterAdd");

f.add(new StringArtExeterAdd()); // Add to the JComponentf.setSize(600, 600);f.center();f.setVisible(true);

}}

Basics Java 2D 9/17

String Art Exeter Add.java

import java.awt.*;import java.awt.geom.*;import javax.swing.*;

public class StringArtExeterAdd extends JComponent {public void paint(Graphics g) { . . . }

public static void main(String[] args) {ApplicationFrame f =

new ApplicationFrame("StringArtExeterAdd");

f.add(new StringArtExeterAdd()); // Add to the JComponentf.setSize(600, 600);f.center();f.setVisible(true);

}}

Basics Java 2D 9/17

String Art Exeter Add.java

import java.awt.*;import java.awt.geom.*;import javax.swing.*;

public class StringArtExeterAdd extends JComponent {public void paint(Graphics g) { . . . }

public static void main(String[] args) {ApplicationFrame f =

new ApplicationFrame("StringArtExeterAdd");

f.add(new StringArtExeterAdd()); // Add to the JComponentf.setSize(600, 600);f.center();f.setVisible(true);

}}

Basics Java 2D 9/17

String Art Exeter Add.java

import java.awt.*;import java.awt.geom.*;import javax.swing.*;

public class StringArtExeterAdd extends JComponent {public void paint(Graphics g) { . . . }

public static void main(String[] args) {ApplicationFrame f =

new ApplicationFrame("StringArtExeterAdd");

f.add(new StringArtExeterAdd()); // Add to the JComponentf.setSize(600, 600);f.center();f.setVisible(true);

}}

Basics Java 2D 9/17

String Art Exeter Add.java

import java.awt.*;import java.awt.geom.*;import javax.swing.*;

public class StringArtExeterAdd extends JComponent {public void paint(Graphics g) { . . . }

public static void main(String[] args) {ApplicationFrame f =

new ApplicationFrame("StringArtExeterAdd");

f.add(new StringArtExeterAdd()); // Add to the JComponentf.setSize(600, 600);f.center();f.setVisible(true);

}}

Basics Java 2D 9/17

Modelling and Transformations

Modelling

Build objects in their own, natural coordinates.Standard size and orientation.Make objects as flexible as possible.

Transformations

Place objects in scene with transformations.Set the size, orientation with transformations.

Java

One graphics object per class.Constructor Instantiate shapes from primitives.paint() Draw the instantiated objects.

Modelling and transformation Java 2D 10/17

Modelling and Transformations

Modelling

Build objects in their own, natural coordinates.Standard size and orientation.Make objects as flexible as possible.

Transformations

Place objects in scene with transformations.Set the size, orientation with transformations.

Java

One graphics object per class.Constructor Instantiate shapes from primitives.paint() Draw the instantiated objects.

Modelling and transformation Java 2D 10/17

Modelling and Transformations

Modelling

Build objects in their own, natural coordinates.Standard size and orientation.Make objects as flexible as possible.

Transformations

Place objects in scene with transformations.Set the size, orientation with transformations.

Java

One graphics object per class.Constructor Instantiate shapes from primitives.paint() Draw the instantiated objects.

Modelling and transformation Java 2D 10/17

Modelling and Transformations

Modelling

Build objects in their own, natural coordinates.Standard size and orientation.Make objects as flexible as possible.

Transformations

Place objects in scene with transformations.Set the size, orientation with transformations.

Java

One graphics object per class.Constructor Instantiate shapes from primitives.paint() Draw the instantiated objects.

Modelling and transformation Java 2D 10/17

Modelling and Transformations

Modelling

Build objects in their own, natural coordinates.Standard size and orientation.Make objects as flexible as possible.

Transformations

Place objects in scene with transformations.Set the size, orientation with transformations.

Java

One graphics object per class.Constructor Instantiate shapes from primitives.paint() Draw the instantiated objects.

Modelling and transformation Java 2D 10/17

Modelling and Transformations

Modelling

Build objects in their own, natural coordinates.Standard size and orientation.Make objects as flexible as possible.

Transformations

Place objects in scene with transformations.Set the size, orientation with transformations.

Java

One graphics object per class.Constructor Instantiate shapes from primitives.paint() Draw the instantiated objects.

Modelling and transformation Java 2D 10/17

Modelling and Transformations

Modelling

Build objects in their own, natural coordinates.Standard size and orientation.Make objects as flexible as possible.

Transformations

Place objects in scene with transformations.Set the size, orientation with transformations.

Java

One graphics object per class.Constructor Instantiate shapes from primitives.paint() Draw the instantiated objects.

Modelling and transformation Java 2D 10/17

Modelling and Transformations

Modelling

Build objects in their own, natural coordinates.Standard size and orientation.Make objects as flexible as possible.

Transformations

Place objects in scene with transformations.Set the size, orientation with transformations.

Java

One graphics object per class.Constructor Instantiate shapes from primitives.paint() Draw the instantiated objects.

Modelling and transformation Java 2D 10/17

Modelling and Transformations

Modelling

Build objects in their own, natural coordinates.Standard size and orientation.Make objects as flexible as possible.

Transformations

Place objects in scene with transformations.Set the size, orientation with transformations.

Java

One graphics object per class.Constructor Instantiate shapes from primitives.paint() Draw the instantiated objects.

Modelling and transformation Java 2D 10/17

Modelling and Transformations

Modelling

Build objects in their own, natural coordinates.Standard size and orientation.Make objects as flexible as possible.

Transformations

Place objects in scene with transformations.Set the size, orientation with transformations.

Java

One graphics object per class.Constructor Instantiate shapes from primitives.paint() Draw the instantiated objects.

Modelling and transformation Java 2D 10/17

Modelling and Transformations

Modelling

Build objects in their own, natural coordinates.Standard size and orientation.Make objects as flexible as possible.

Transformations

Place objects in scene with transformations.Set the size, orientation with transformations.

Java

One graphics object per class.Constructor Instantiate shapes from primitives.paint() Draw the instantiated objects.

Modelling and transformation Java 2D 10/17

Modelling and Transformations

Modelling

Build objects in their own, natural coordinates.Standard size and orientation.Make objects as flexible as possible.

Transformations

Place objects in scene with transformations.Set the size, orientation with transformations.

Java

One graphics object per class.Constructor Instantiate shapes from primitives.paint() Draw the instantiated objects.

Modelling and transformation Java 2D 10/17

House.java – Primitives

body RectangleBottom left corner at (0,0)Width 150, Height 150

door RectangleBottom left corner at (50, 0)Width 50, Height 75.

roof Two lines( 0, 150) → (75, 250)(150, 150) → (75, 250)

(0,150)

(150,150)

(50,75) (100, 75)

(75,250)

(0,0)

(0,150)

Modelling and transformation Java 2D 11/17

House.java – Primitives

body RectangleBottom left corner at (0,0)Width 150, Height 150

door RectangleBottom left corner at (50, 0)Width 50, Height 75.

roof Two lines( 0, 150) → (75, 250)(150, 150) → (75, 250)

(0,150)

(150,150)

(50,75) (100, 75)

(75,250)

(0,0)

(0,150)

Modelling and transformation Java 2D 11/17

House.java – Primitives

body RectangleBottom left corner at (0,0)Width 150, Height 150

door RectangleBottom left corner at (50, 0)Width 50, Height 75.

roof Two lines( 0, 150) → (75, 250)(150, 150) → (75, 250)

(0,150)

(150,150)

(50,75) (100, 75)

(75,250)

(0,0)

(0,150)

Modelling and transformation Java 2D 11/17

House.java – Primitives

body RectangleBottom left corner at (0,0)Width 150, Height 150

door RectangleBottom left corner at (50, 0)Width 50, Height 75.

roof Two lines( 0, 150) → (75, 250)(150, 150) → (75, 250)

(0,150)

(150,150)

(50,75) (100, 75)

(75,250)

(0,0)

(0,150)

Modelling and transformation Java 2D 11/17

House.java – Primitives

body RectangleBottom left corner at (0,0)Width 150, Height 150

door RectangleBottom left corner at (50, 0)Width 50, Height 75.

roof Two lines( 0, 150) → (75, 250)(150, 150) → (75, 250)

(0,150)

(150,150)

(50,75) (100, 75)

(75,250)

(0,0)

(0,150)

Modelling and transformation Java 2D 11/17

House.java – Primitives

body RectangleBottom left corner at (0,0)Width 150, Height 150

door RectangleBottom left corner at (50, 0)Width 50, Height 75.

roof Two lines( 0, 150) → (75, 250)(150, 150) → (75, 250)

(0,150)

(150,150)

(50,75) (100, 75)

(75,250)

(0,0)

(0,150)

Modelling and transformation Java 2D 11/17

House.java – Primitives

body RectangleBottom left corner at (0,0)Width 150, Height 150

door RectangleBottom left corner at (50, 0)Width 50, Height 75.

roof Two lines( 0, 150) → (75, 250)(150, 150) → (75, 250)

(0,150)

(150,150)

(50,75) (100, 75)

(75,250)

(0,0)

(0,150)

Modelling and transformation Java 2D 11/17

House.java – Primitives

body RectangleBottom left corner at (0,0)Width 150, Height 150

door RectangleBottom left corner at (50, 0)Width 50, Height 75.

roof Two lines( 0, 150) → (75, 250)(150, 150) → (75, 250)

(0,150)

(150,150)

(50,75) (100, 75)

(75,250)

(0,0)

(0,150)

Modelling and transformation Java 2D 11/17

House.java – Primitives

body RectangleBottom left corner at (0,0)Width 150, Height 150

door RectangleBottom left corner at (50, 0)Width 50, Height 75.

roof Two lines( 0, 150) → (75, 250)(150, 150) → (75, 250)

(0,150)

(150,150)

(50,75) (100, 75)

(75,250)

(0,0)

(0,150)

Modelling and transformation Java 2D 11/17

House.java – Primitives

body RectangleBottom left corner at (0,0)Width 150, Height 150

door RectangleBottom left corner at (50, 0)Width 50, Height 75.

roof Two lines( 0, 150) → (75, 250)(150, 150) → (75, 250)

(0,150)

(150,150)

(50,75) (100, 75)

(75,250)

(0,0)

(0,150)

Modelling and transformation Java 2D 11/17

House.java – Primitives

body RectangleBottom left corner at (0,0)Width 150, Height 150

door RectangleBottom left corner at (50, 0)Width 50, Height 75.

roof Two lines( 0, 150) → (75, 250)(150, 150) → (75, 250)

(0,150)

(150,150)

(50,75) (100, 75)

(75,250)

(0,0)

(0,150)

Modelling and transformation Java 2D 11/17

House.java – Constructor

import java.awt.*;import java.awt.geom.*;

public class House {private Rectangle2D body;private Rectangle2D door;private GeneralPath roof = new GeneralPath();

public House() {// Setup the shapesbody = new Rectangle2D.Double(0.0, 0.0, 150.0, 150.0);door = new Rectangle2D.Double(50.0, 0.0, 50.0, 75.0);roof.append(new Line2D.Double(0.0, 150., 75., 250.), false);roof.append(new Line2D.Double(150., 150., 75., 250.), false);

}

public paint(Graphics g) {. . .

}}

Modelling and transformation Java 2D 12/17

House.java – Constructor

import java.awt.*;import java.awt.geom.*;

public class House {private Rectangle2D body;private Rectangle2D door;private GeneralPath roof = new GeneralPath();

public House() {// Setup the shapesbody = new Rectangle2D.Double(0.0, 0.0, 150.0, 150.0);door = new Rectangle2D.Double(50.0, 0.0, 50.0, 75.0);roof.append(new Line2D.Double(0.0, 150., 75., 250.), false);roof.append(new Line2D.Double(150., 150., 75., 250.), false);

}

public paint(Graphics g) {. . .

}}

Modelling and transformation Java 2D 12/17

House.java – Constructor

import java.awt.*;import java.awt.geom.*;

public class House {private Rectangle2D body;private Rectangle2D door;private GeneralPath roof = new GeneralPath();

public House() {// Setup the shapesbody = new Rectangle2D.Double(0.0, 0.0, 150.0, 150.0);door = new Rectangle2D.Double(50.0, 0.0, 50.0, 75.0);roof.append(new Line2D.Double(0.0, 150., 75., 250.), false);roof.append(new Line2D.Double(150., 150., 75., 250.), false);

}

public paint(Graphics g) {. . .

}}

Modelling and transformation Java 2D 12/17

House.java – Constructor

import java.awt.*;import java.awt.geom.*;

public class House {private Rectangle2D body;private Rectangle2D door;private GeneralPath roof = new GeneralPath();

public House() {// Setup the shapesbody = new Rectangle2D.Double(0.0, 0.0, 150.0, 150.0);door = new Rectangle2D.Double(50.0, 0.0, 50.0, 75.0);roof.append(new Line2D.Double(0.0, 150., 75., 250.), false);roof.append(new Line2D.Double(150., 150., 75., 250.), false);

}

public paint(Graphics g) {. . .

}}

Modelling and transformation Java 2D 12/17

House.java – Constructor

import java.awt.*;import java.awt.geom.*;

public class House {private Rectangle2D body;private Rectangle2D door;private GeneralPath roof = new GeneralPath();

public House() {// Setup the shapesbody = new Rectangle2D.Double(0.0, 0.0, 150.0, 150.0);door = new Rectangle2D.Double(50.0, 0.0, 50.0, 75.0);roof.append(new Line2D.Double(0.0, 150., 75., 250.), false);roof.append(new Line2D.Double(150., 150., 75., 250.), false);

}

public paint(Graphics g) {. . .

}}

Modelling and transformation Java 2D 12/17

House.java – Constructor

import java.awt.*;import java.awt.geom.*;

public class House {private Rectangle2D body;private Rectangle2D door;private GeneralPath roof = new GeneralPath();

public House() {// Setup the shapesbody = new Rectangle2D.Double(0.0, 0.0, 150.0, 150.0);door = new Rectangle2D.Double(50.0, 0.0, 50.0, 75.0);roof.append(new Line2D.Double(0.0, 150., 75., 250.), false);roof.append(new Line2D.Double(150., 150., 75., 250.), false);

}

public paint(Graphics g) {. . .

}}

Modelling and transformation Java 2D 12/17

House.java – Constructor

import java.awt.*;import java.awt.geom.*;

public class House {private Rectangle2D body;private Rectangle2D door;private GeneralPath roof = new GeneralPath();

public House() {// Setup the shapesbody = new Rectangle2D.Double(0.0, 0.0, 150.0, 150.0);door = new Rectangle2D.Double(50.0, 0.0, 50.0, 75.0);roof.append(new Line2D.Double(0.0, 150., 75., 250.), false);roof.append(new Line2D.Double(150., 150., 75., 250.), false);

}

public paint(Graphics g) {. . .

}}

Modelling and transformation Java 2D 12/17

House.java – Constructor

import java.awt.*;import java.awt.geom.*;

public class House {private Rectangle2D body;private Rectangle2D door;private GeneralPath roof = new GeneralPath();

public House() {// Setup the shapesbody = new Rectangle2D.Double(0.0, 0.0, 150.0, 150.0);door = new Rectangle2D.Double(50.0, 0.0, 50.0, 75.0);roof.append(new Line2D.Double(0.0, 150., 75., 250.), false);roof.append(new Line2D.Double(150., 150., 75., 250.), false);

}

public paint(Graphics g) {. . .

}}

Modelling and transformation Java 2D 12/17

House.java – Constructor

import java.awt.*;import java.awt.geom.*;

public class House {private Rectangle2D body;private Rectangle2D door;private GeneralPath roof = new GeneralPath();

public House() {// Setup the shapesbody = new Rectangle2D.Double(0.0, 0.0, 150.0, 150.0);door = new Rectangle2D.Double(50.0, 0.0, 50.0, 75.0);roof.append(new Line2D.Double(0.0, 150., 75., 250.), false);roof.append(new Line2D.Double(150., 150., 75., 250.), false);

}

public paint(Graphics g) {. . .

}}

Modelling and transformation Java 2D 12/17

House.java – Constructor

import java.awt.*;import java.awt.geom.*;

public class House {private Rectangle2D body;private Rectangle2D door;private GeneralPath roof = new GeneralPath();

public House() {// Setup the shapesbody = new Rectangle2D.Double(0.0, 0.0, 150.0, 150.0);door = new Rectangle2D.Double(50.0, 0.0, 50.0, 75.0);roof.append(new Line2D.Double(0.0, 150., 75., 250.), false);roof.append(new Line2D.Double(150., 150., 75., 250.), false);

}

public paint(Graphics g) {. . .

}}

Modelling and transformation Java 2D 12/17

House.java – paint()

public void paint(Graphics g) {Graphics2D g2 = (Graphics2D)g; // Promote to 2D context

g2.setStroke(new BasicStroke(5));g2.setPaint(Color.red); // Interiorg2.fill(body);g2.setPaint(Color.black); // Borderg2.draw(body);

g2.setPaint(Color.cyan);g2.draw(roof);

g2.setPaint(Color.green);g2.fill(door);

}

Modelling and transformation Java 2D 13/17

House.java – paint()

public void paint(Graphics g) {Graphics2D g2 = (Graphics2D)g; // Promote to 2D context

g2.setStroke(new BasicStroke(5));g2.setPaint(Color.red); // Interiorg2.fill(body);g2.setPaint(Color.black); // Borderg2.draw(body);

g2.setPaint(Color.cyan);g2.draw(roof);

g2.setPaint(Color.green);g2.fill(door);

}

Modelling and transformation Java 2D 13/17

House.java – paint()

public void paint(Graphics g) {Graphics2D g2 = (Graphics2D)g; // Promote to 2D context

g2.setStroke(new BasicStroke(5));g2.setPaint(Color.red); // Interiorg2.fill(body);g2.setPaint(Color.black); // Borderg2.draw(body);

g2.setPaint(Color.cyan);g2.draw(roof);

g2.setPaint(Color.green);g2.fill(door);

}

Modelling and transformation Java 2D 13/17

House.java – paint()

public void paint(Graphics g) {Graphics2D g2 = (Graphics2D)g; // Promote to 2D context

g2.setStroke(new BasicStroke(5));g2.setPaint(Color.red); // Interiorg2.fill(body);g2.setPaint(Color.black); // Borderg2.draw(body);

g2.setPaint(Color.cyan);g2.draw(roof);

g2.setPaint(Color.green);g2.fill(door);

}

Modelling and transformation Java 2D 13/17

House.java – paint()

public void paint(Graphics g) {Graphics2D g2 = (Graphics2D)g; // Promote to 2D context

g2.setStroke(new BasicStroke(5));g2.setPaint(Color.red); // Interiorg2.fill(body);g2.setPaint(Color.black); // Borderg2.draw(body);

g2.setPaint(Color.cyan);g2.draw(roof);

g2.setPaint(Color.green);g2.fill(door);

}

Modelling and transformation Java 2D 13/17

House.java – paint()

public void paint(Graphics g) {Graphics2D g2 = (Graphics2D)g; // Promote to 2D context

g2.setStroke(new BasicStroke(5));g2.setPaint(Color.red); // Interiorg2.fill(body);g2.setPaint(Color.black); // Borderg2.draw(body);

g2.setPaint(Color.cyan);g2.draw(roof);

g2.setPaint(Color.green);g2.fill(door);

}

Modelling and transformation Java 2D 13/17

House.java – paint()

public void paint(Graphics g) {Graphics2D g2 = (Graphics2D)g; // Promote to 2D context

g2.setStroke(new BasicStroke(5));g2.setPaint(Color.red); // Interiorg2.fill(body);g2.setPaint(Color.black); // Borderg2.draw(body);

g2.setPaint(Color.cyan);g2.draw(roof);

g2.setPaint(Color.green);g2.fill(door);

}

Modelling and transformation Java 2D 13/17

Draw House.java – Constructor / Main

import java.awt.*;import java.awt.geom.*;

public class DrawHouse extends ApplicationFrame {private House house = new House();

public DrawHouse() {super("DrawHouse");setSize(600, 600);center();setVisible(true);

}

public void paint(Graphics g) {. . .

}

public static void main(String[] args) {new DrawHouse();

}}

Modelling and transformation Java 2D 14/17

Draw House.java – Constructor / Main

import java.awt.*;import java.awt.geom.*;

public class DrawHouse extends ApplicationFrame {private House house = new House();

public DrawHouse() {super("DrawHouse");setSize(600, 600);center();setVisible(true);

}

public void paint(Graphics g) {. . .

}

public static void main(String[] args) {new DrawHouse();

}}

Modelling and transformation Java 2D 14/17

Draw House.java – Constructor / Main

import java.awt.*;import java.awt.geom.*;

public class DrawHouse extends ApplicationFrame {private House house = new House();

public DrawHouse() {super("DrawHouse");setSize(600, 600);center();setVisible(true);

}

public void paint(Graphics g) {. . .

}

public static void main(String[] args) {new DrawHouse();

}}

Modelling and transformation Java 2D 14/17

Draw House.java – Constructor / Main

import java.awt.*;import java.awt.geom.*;

public class DrawHouse extends ApplicationFrame {private House house = new House();

public DrawHouse() {super("DrawHouse");setSize(600, 600);center();setVisible(true);

}

public void paint(Graphics g) {. . .

}

public static void main(String[] args) {new DrawHouse();

}}

Modelling and transformation Java 2D 14/17

Draw House.java – Constructor / Main

import java.awt.*;import java.awt.geom.*;

public class DrawHouse extends ApplicationFrame {private House house = new House();

public DrawHouse() {super("DrawHouse");setSize(600, 600);center();setVisible(true);

}

public void paint(Graphics g) {. . .

}

public static void main(String[] args) {new DrawHouse();

}}

Modelling and transformation Java 2D 14/17

Draw House.java – Constructor / Main

import java.awt.*;import java.awt.geom.*;

public class DrawHouse extends ApplicationFrame {private House house = new House();

public DrawHouse() {super("DrawHouse");setSize(600, 600);center();setVisible(true);

}

public void paint(Graphics g) {. . .

}

public static void main(String[] args) {new DrawHouse();

}}

Modelling and transformation Java 2D 14/17

Draw House.java – Constructor / Main

import java.awt.*;import java.awt.geom.*;

public class DrawHouse extends ApplicationFrame {private House house = new House();

public DrawHouse() {super("DrawHouse");setSize(600, 600);center();setVisible(true);

}

public void paint(Graphics g) {. . .

}

public static void main(String[] args) {new DrawHouse();

}}

Modelling and transformation Java 2D 14/17

Draw House.java – Constructor / Main

import java.awt.*;import java.awt.geom.*;

public class DrawHouse extends ApplicationFrame {private House house = new House();

public DrawHouse() {super("DrawHouse");setSize(600, 600);center();setVisible(true);

}

public void paint(Graphics g) {. . .

}

public static void main(String[] args) {new DrawHouse();

}}

Modelling and transformation Java 2D 14/17

Draw House.java – paint()

Simply paint the house

public void paint(Graphics g) {Graphics2D g2 = (Graphics2D)g; // Promote to 2D contexthouse.paint(g); // Get House to paint itself

}

Translate to centre of Frame

public void paint(Graphics g) {Graphics2D g2 = (Graphics2D)g; // Promote to 2D context

// Translate the origin to middle of screenAffineTransform T =

AffineTransform.getTranslateInstance(300.0,300.0);g2.setTransform(T);

house.paint(g); // Get House to paint itself}

Modelling and transformation Java 2D 15/17

Draw House.java – paint()

Simply paint the house

public void paint(Graphics g) {Graphics2D g2 = (Graphics2D)g; // Promote to 2D contexthouse.paint(g); // Get House to paint itself

}

Translate to centre of Frame

public void paint(Graphics g) {Graphics2D g2 = (Graphics2D)g; // Promote to 2D context

// Translate the origin to middle of screenAffineTransform T =

AffineTransform.getTranslateInstance(300.0,300.0);g2.setTransform(T);

house.paint(g); // Get House to paint itself}

Modelling and transformation Java 2D 15/17

Draw House.java – paint()

Simply paint the house

public void paint(Graphics g) {Graphics2D g2 = (Graphics2D)g; // Promote to 2D contexthouse.paint(g); // Get House to paint itself

}

Translate to centre of Frame

public void paint(Graphics g) {Graphics2D g2 = (Graphics2D)g; // Promote to 2D context

// Translate the origin to middle of screenAffineTransform T =

AffineTransform.getTranslateInstance(300.0,300.0);g2.setTransform(T);

house.paint(g); // Get House to paint itself}

Modelling and transformation Java 2D 15/17

Draw House.java – paint()

Simply paint the house

public void paint(Graphics g) {Graphics2D g2 = (Graphics2D)g; // Promote to 2D contexthouse.paint(g); // Get House to paint itself

}

Translate to centre of Frame

public void paint(Graphics g) {Graphics2D g2 = (Graphics2D)g; // Promote to 2D context

// Translate the origin to middle of screenAffineTransform T =

AffineTransform.getTranslateInstance(300.0,300.0);g2.setTransform(T);

house.paint(g); // Get House to paint itself}

Modelling and transformation Java 2D 15/17

Draw House.java – paint()

Simply paint the house

public void paint(Graphics g) {Graphics2D g2 = (Graphics2D)g; // Promote to 2D contexthouse.paint(g); // Get House to paint itself

}

Translate to centre of Frame

public void paint(Graphics g) {Graphics2D g2 = (Graphics2D)g; // Promote to 2D context

// Translate the origin to middle of screenAffineTransform T =

AffineTransform.getTranslateInstance(300.0,300.0);g2.setTransform(T);

house.paint(g); // Get House to paint itself}

Modelling and transformation Java 2D 15/17

Draw House.java – paint()

Simply paint the house

public void paint(Graphics g) {Graphics2D g2 = (Graphics2D)g; // Promote to 2D contexthouse.paint(g); // Get House to paint itself

}

Translate to centre of Frame

public void paint(Graphics g) {Graphics2D g2 = (Graphics2D)g; // Promote to 2D context

// Translate the origin to middle of screenAffineTransform T =

AffineTransform.getTranslateInstance(300.0,300.0);g2.setTransform(T);

house.paint(g); // Get House to paint itself}

Modelling and transformation Java 2D 15/17

Draw House.java – paint()

Simply paint the house

public void paint(Graphics g) {Graphics2D g2 = (Graphics2D)g; // Promote to 2D contexthouse.paint(g); // Get House to paint itself

}

Translate to centre of Frame

public void paint(Graphics g) {Graphics2D g2 = (Graphics2D)g; // Promote to 2D context

// Translate the origin to middle of screenAffineTransform T =

AffineTransform.getTranslateInstance(300.0,300.0);g2.setTransform(T);

house.paint(g); // Get House to paint itself}

Modelling and transformation Java 2D 15/17

Draw House.java – paint()

Simply paint the house

public void paint(Graphics g) {Graphics2D g2 = (Graphics2D)g; // Promote to 2D contexthouse.paint(g); // Get House to paint itself

}

Translate to centre of Frame

public void paint(Graphics g) {Graphics2D g2 = (Graphics2D)g; // Promote to 2D context

// Translate the origin to middle of screenAffineTransform T =

AffineTransform.getTranslateInstance(300.0,300.0);g2.setTransform(T);

house.paint(g); // Get House to paint itself}

Modelling and transformation Java 2D 15/17

Draw House.java – paint()

Simply paint the house

public void paint(Graphics g) {Graphics2D g2 = (Graphics2D)g; // Promote to 2D contexthouse.paint(g); // Get House to paint itself

}

Translate to centre of Frame

public void paint(Graphics g) {Graphics2D g2 = (Graphics2D)g; // Promote to 2D context

// Translate the origin to middle of screenAffineTransform T =

AffineTransform.getTranslateInstance(300.0,300.0);g2.setTransform(T);

house.paint(g); // Get House to paint itself}

Modelling and transformation Java 2D 15/17

Draw House.java – paint()

Rotate and translate to centre of Frame

public void paint(Graphics g) {Graphics2D g2 = (Graphics2D)g; // Promote to 2D context

// Rotate by 180 degreesAffineTransform R = AffineTransform.getRotateInstance(Math.PI);

// Translate the origin to middle of screenAffineTransform T =

AffineTransform.getTranslateInstance(300.0,300.0);

T.concatenate(R); // Rotate, then translateg2.setTransform(T);

house.paint(g); // Get House to paint itself}

Modelling and transformation Java 2D 16/17

Draw House.java – paint()

Rotate and translate to centre of Frame

public void paint(Graphics g) {Graphics2D g2 = (Graphics2D)g; // Promote to 2D context

// Rotate by 180 degreesAffineTransform R = AffineTransform.getRotateInstance(Math.PI);

// Translate the origin to middle of screenAffineTransform T =

AffineTransform.getTranslateInstance(300.0,300.0);

T.concatenate(R); // Rotate, then translateg2.setTransform(T);

house.paint(g); // Get House to paint itself}

Modelling and transformation Java 2D 16/17

Draw House.java – paint()

Rotate and translate to centre of Frame

public void paint(Graphics g) {Graphics2D g2 = (Graphics2D)g; // Promote to 2D context

// Rotate by 180 degreesAffineTransform R = AffineTransform.getRotateInstance(Math.PI);

// Translate the origin to middle of screenAffineTransform T =

AffineTransform.getTranslateInstance(300.0,300.0);

T.concatenate(R); // Rotate, then translateg2.setTransform(T);

house.paint(g); // Get House to paint itself}

Modelling and transformation Java 2D 16/17

Draw House.java – paint()

Rotate and translate to centre of Frame

public void paint(Graphics g) {Graphics2D g2 = (Graphics2D)g; // Promote to 2D context

// Rotate by 180 degreesAffineTransform R = AffineTransform.getRotateInstance(Math.PI);

// Translate the origin to middle of screenAffineTransform T =

AffineTransform.getTranslateInstance(300.0,300.0);

T.concatenate(R); // Rotate, then translateg2.setTransform(T);

house.paint(g); // Get House to paint itself}

Modelling and transformation Java 2D 16/17

Draw House.java – paint()

Rotate and translate to centre of Frame

public void paint(Graphics g) {Graphics2D g2 = (Graphics2D)g; // Promote to 2D context

// Rotate by 180 degreesAffineTransform R = AffineTransform.getRotateInstance(Math.PI);

// Translate the origin to middle of screenAffineTransform T =

AffineTransform.getTranslateInstance(300.0,300.0);

T.concatenate(R); // Rotate, then translateg2.setTransform(T);

house.paint(g); // Get House to paint itself}

Modelling and transformation Java 2D 16/17

Draw House.java – paint()

Rotate and translate to centre of Frame

public void paint(Graphics g) {Graphics2D g2 = (Graphics2D)g; // Promote to 2D context

// Rotate by 180 degreesAffineTransform R = AffineTransform.getRotateInstance(Math.PI);

// Translate the origin to middle of screenAffineTransform T =

AffineTransform.getTranslateInstance(300.0,300.0);

T.concatenate(R); // Rotate, then translateg2.setTransform(T);

house.paint(g); // Get House to paint itself}

Modelling and transformation Java 2D 16/17

Draw House.java – paint()

Rotate and translate to centre of Frame

public void paint(Graphics g) {Graphics2D g2 = (Graphics2D)g; // Promote to 2D context

// Rotate by 180 degreesAffineTransform R = AffineTransform.getRotateInstance(Math.PI);

// Translate the origin to middle of screenAffineTransform T =

AffineTransform.getTranslateInstance(300.0,300.0);

T.concatenate(R); // Rotate, then translateg2.setTransform(T);

house.paint(g); // Get House to paint itself}

Modelling and transformation Java 2D 16/17

DrawHouse.java

No Transformations Translation Rotate, then translate

Draw objects in their own local coordinate system.

Use affine transformations to place them in the scene.

Modelling and transformation Java 2D 17/17

DrawHouse.java

No Transformations Translation Rotate, then translate

Draw objects in their own local coordinate system.

Use affine transformations to place them in the scene.

Modelling and transformation Java 2D 17/17

DrawHouse.java

No Transformations Translation Rotate, then translate

Draw objects in their own local coordinate system.

Use affine transformations to place them in the scene.

Modelling and transformation Java 2D 17/17

DrawHouse.java

No Transformations Translation Rotate, then translate

Draw objects in their own local coordinate system.

Use affine transformations to place them in the scene.

Modelling and transformation Java 2D 17/17

DrawHouse.java

No Transformations Translation Rotate, then translate

Draw objects in their own local coordinate system.

Use affine transformations to place them in the scene.

Modelling and transformation Java 2D 17/17

DrawHouse.java

No Transformations Translation Rotate, then translate

Draw objects in their own local coordinate system.

Use affine transformations to place them in the scene.

Modelling and transformation Java 2D 17/17