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Listing 27 . Source code for the program named GM01test02.
/*GM01test02.java
Copyright 2008, R.G.BaldwinRevised 02/18/08
This program tests many 2D aspects of the GM01 libraryusing both text and graphics.
Tested using JDK 1.6 under WinXP.*********************************************************/
import java.awt.*;import javax.swing.*;
import java.awt.geom.*;class GM01test02{
public static void main(String[]args){
GUI guiObj = new GUI();}//end main
}//end controlling class GM01test02//======================================================//
class GUI extends JFrame{//Specify the horizontal and vertical size of a JFrame
// object.int hSize = 400;
int vSize = 400;Image osi;//an off-screen image
int osiWidth;//off-screen image widthint osiHeight;//off-screen image height
MyCanvas myCanvas;//a subclass of CanvasGUI(){//constructor//Set JFrame size, title, and close operation.
setSize(hSize,vSize);setTitle("Copyright 2008,R.G.Baldwin");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//Create a new drawing canvas and add it to the// center of the JFrame.
myCanvas = new MyCanvas();this.getContentPane().add(myCanvas);//This object must be visible before you can get an
// off-screen image. It must also be visible before// you can compute the size of the canvas.
setVisible(true);osiWidth = myCanvas.getWidth();
osiHeight = myCanvas.getHeight();//Create an off-screen image and get a graphics
// context on it.osi = createImage(osiWidth,osiHeight);
Graphics2D g2D = (Graphics2D)(osi.getGraphics());//Perform tests using text.testUsingText();//Perform tests using graphics.
drawOffScreen(g2D);//Cause the overridden paint method belonging to
// myCanvas to be executed.myCanvas.repaint();
}//end constructor//----------------------------------------------------////The purpose of this method is to test various
// 2D aspects of the library using text.public void testUsingText(){
System.out.println("Test overridden toString of ColMatrix2D");
GM01.ColMatrix2D tempA =new GM01.ColMatrix2D(1.5,2.5);
System.out.println(tempA);System.out.println();System.out.println(
"Test setData and getData of ColMatrix2D");tempA.setData(0,4.5);
System.out.println(tempA.getData(0));tempA.setData(1,5.5);
System.out.println(tempA.getData(1));System.out.println();System.out.println(
"Test equals method of ColMatrix2D");GM01.ColMatrix2D tempB =
new GM01.ColMatrix2D(1.5,2.5);System.out.println(tempA.equals(tempB));
tempB.setData(0,4.5);tempB.setData(1,5.5);
System.out.println(tempA.equals(tempB));System.out.println();System.out.println("Test add method of ColMatrix2D");
System.out.println(tempA.add(tempB));System.out.println();System.out.println(
"Test subtract method of ColMatrix2D");System.out.println(tempA.subtract(tempB));
System.out.println();System.out.println("Test toString method of Point2D");GM01.Point2D pointA = new GM01.Point2D(tempA);
System.out.println(pointA);System.out.println();System.out.println(
"Test setData and getData of Point2D");pointA.setData(0,1.1);
System.out.println(pointA.getData(0));pointA.setData(1,2.2);
System.out.println(pointA.getData(1));System.out.println();System.out.println(
"Test getColMatrix method of Point2D");System.out.println(pointA.getColMatrix());
System.out.println();System.out.println("Test equals method of Point2D");GM01.Point2D pointB = new GM01.Point2D(tempB);
System.out.println(pointA.equals(pointB));pointA = new GM01.Point2D(tempB);
System.out.println(pointA.equals(pointB));System.out.println();System.out.println(
"Test getDisplacementVector method of Point2D");pointA =
new GM01.Point2D(new GM01.ColMatrix2D(1.5,2.5));System.out.println(pointA);
System.out.println(pointB);System.out.println(
pointA.getDisplacementVector(pointB));System.out.println();System.out.println(
"Test addVectorToPoint method of Point2D");System.out.println(pointA);
System.out.println(pointA.addVectorToPoint(new GM01.Vector2D(new GM01.ColMatrix2D(5.5,6.5))));
System.out.println();//See the method named drawOffScreen for a test of// the draw method of the Point2D class.System.out.println(
"Test toString method of Vector2D");GM01.Vector2D vecA =
new GM01.Vector2D(new GM01.ColMatrix2D(1.5,2.5));System.out.println(vecA);
System.out.println();System.out.println("Test setData and getData methods of Vector2D");
vecA.setData(0,4.5);System.out.println(vecA.getData(0));
vecA.setData(1,5.5);System.out.println(vecA.getData(1));
System.out.println();//See the method named drawOffScreen for a test of// the draw method of the Vector2D class.System.out.println(
"Test getColMatrix method of Vector2D");System.out.println(vecA.getColMatrix());
System.out.println();System.out.println("Test equals method of Vector2D");GM01.Vector2D vecB =
new GM01.Vector2D(new GM01.ColMatrix2D(1.5,2.5));System.out.println(vecA.equals(vecB));
vecB.setData(0,4.5);vecB.setData(1,5.5);
System.out.println(vecA.equals(vecB));System.out.println("Test add method of Vector2D");System.out.println(vecA);
vecB =new GM01.Vector2D(new GM01.ColMatrix2D(-1.5,3.5));System.out.println(vecB);
System.out.println(vecA.add(vecB));System.out.println();System.out.println(
"Test getLength method of Vector2D");vecA =
new GM01.Vector2D(new GM01.ColMatrix2D(3.0,4.0));System.out.println(vecA);
System.out.println(vecA.getLength());System.out.println();
System.out.println("Test toString method of Line2D");GM01.Line2D lineA = new GM01.Line2D(pointA,pointB);
System.out.println(lineA);System.out.println();System.out.println("Test setTail, setHead, getTail, "
+ "\nand getHead methods of Line2D");lineA.setTail(pointB);
lineA.setHead(pointA);System.out.println(lineA.getTail());
System.out.println(lineA.getHead());System.out.println();//See the method named drawOffScreen for a test of
// the draw method of the Line2D class.}//end testUsingText//----------------------------------------------------////The purpose of this method is test various 2D aspects
// of the game-math library using graphics.void drawOffScreen(Graphics2D g2D){//Translate the origin on the off-screen
// image and draw a pair of orthogonal axes on it.setCoordinateFrame(g2D);
//Define the corners of a square in 2D that is// centered on the origin.
GM01.Point2D pointA =new GM01.Point2D(new GM01.ColMatrix2D(75,-75));
GM01.Point2D pointB =new GM01.Point2D(new GM01.ColMatrix2D(-75,-75));
GM01.Point2D pointC =new GM01.Point2D(new GM01.ColMatrix2D(-75,75));
GM01.Point2D pointD =new GM01.Point2D(new GM01.ColMatrix2D(75,75));
//Draw three of the points in BLACK. Draw the fourth// point in RED to identify it.
g2D.setColor(Color.BLACK);pointA.draw(g2D);
pointB.draw(g2D);pointC.draw(g2D);
g2D.setColor(Color.RED);pointD.draw(g2D);
g2D.setColor(Color.BLACK);//Draw four lines connecting the points to produce
// the outline of a square.GM01.Line2D lineAB = new GM01.Line2D(pointA,pointB);
lineAB.draw(g2D);GM01.Line2D lineBC = new GM01.Line2D(pointB,pointC);lineBC.draw(g2D);GM01.Line2D lineCD = new GM01.Line2D(pointC,pointD);
lineCD.draw(g2D);GM01.Line2D lineDA = new GM01.Line2D(pointD,pointA);lineDA.draw(g2D);//Define a vector.
GM01.Vector2D vecA = new GM01.Vector2D(new GM01.ColMatrix2D(75,75));
//Draw the vector with its tail at pointB. The length// and direction of the vector will cause its head
// to be at the origin.g2D.setColor(Color.MAGENTA);
vecA.draw(g2D,pointB);}//end drawOffScreen
//----------------------------------------------------////This method is used to set the origin of the
// off-screen image and to draw orthogonal 2D axes on// the image that intersect at the origin.
private void setCoordinateFrame(Graphics2D g2D){//Translate the origin to the center.
GM01.translate(g2D,0.5*osiWidth,-0.5*osiHeight);//Draw x-axis in RED
g2D.setColor(Color.RED);GM01.drawLine(g2D,-75,0,75,0);//Draw y-axis in GREEN
g2D.setColor(Color.GREEN);GM01.drawLine(g2D,0,75,0,-75);
}//end setCoordinateFrame method//====================================================////This is an inner class of the GUI class.class MyCanvas extends Canvas{
//Override the paint() method. This method will be// called when the JFrame and the Canvas appear on the
// screen or when the repaint method is called on the// Canvas object.
//The purpose of this method is to display the// off-screen image on the screen.
public void paint(Graphics g){g.drawImage(osi,0,0,this);
}//end overridden paint()}//end inner class MyCanvas}//end class GUI//======================================================//
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