File	Doc	Category	Size	Date	Package
Transforms.java	API Doc	Example	3547	Sat Jan 24 10:44:36 GMT 2004	je3.graphics

Transforms

• java.lang.Object

Fields Summary
Shape	shape
AffineTransform[]	transforms
String[]	transformLabels

Constructors Summary

public Transforms() This constructor sets up the Shape and AffineTransform objects we need GeneralPath path = new GeneralPath(); // Create a shape to draw path.append(new Line2D.Float(0.0f, 0.0f, 0.0f, 100.0f), false); path.append(new Line2D.Float(-10.0f, 50.0f, 10.0f, 50.0f), false); path.append(new Polygon(new int[] { -5, 0, 5 }, new int[] { 5, 0, 5 }, 3), false); this.shape = path; // Remember this shape // Set up some transforms to alter the shape this.transforms = new AffineTransform[6]; // 1) the identity transform transforms[0] = new AffineTransform(); // 2) A scale tranform: 3/4 size transforms[1] = AffineTransform.getScaleInstance(0.75, 0.75); // 3) A shearing transform transforms[2] = AffineTransform.getShearInstance(-0.4, 0.0); // 4) A 30 degree clockwise rotation about the origin of the shape transforms[3] = AffineTransform.getRotateInstance(Math.PI*2/12); // 5) A 180 degree rotation about the midpoint of the shape transforms[4] = AffineTransform.getRotateInstance(Math.PI, 0.0, 50.0); // 6) A combination transform transforms[5] = AffineTransform.getScaleInstance(0.5, 1.5); transforms[5].shear(0.0, 0.4); transforms[5].rotate(Math.PI/2, 0.0, 50.0); // 90 degrees // Define names for the transforms transformLabels = new String[] { "identity", "scale", "shear", "rotate", "rotate", "combo" };

Methods Summary
public void	draw(java.awt.Graphics2D g, java.awt.Component c) Draw the defined shape and label, using each transform // Define basic drawing attributes g.setColor(Color.black); // black g.setStroke(new BasicStroke(2.0f, BasicStroke.CAP_SQUARE, // 2-pixel BasicStroke.JOIN_BEVEL)); g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, // antialias RenderingHints.VALUE_ANTIALIAS_ON); // Now draw the shape once using each of the transforms we've defined for(int i = 0; i < transforms.length; i++) { AffineTransform save = g.getTransform(); // save current state g.translate(i*125 + 50, 50); // move origin g.transform(transforms[i]); // apply transform g.draw(shape); // draw shape g.drawString(transformLabels[i], -25, 125); // draw label g.drawRect(-40, -10, 80, 150); // draw box g.setTransform(save); // restore transform }
public int	getHeight() return 250;
public java.lang.String	getName() return "Transforms";
public int	getWidth() return 750;