в 17:44, 31 мая 2010

2010-05-31T17:44:26Z

Admin: 1 версия

2010-05-31T15:25:33Z

1 версия

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== CubicCurve2D.Float ==



<source lang="java">
import java.awt.Frame;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.geom.CubicCurve2D;
public class MainClass extends Frame {
public static void main(String[] args) {
(new MainClass()).setVisible(true);
}
public MainClass() {
super("Shape Sampler");
setSize(400, 550);
}
public void paint(Graphics g) {
Graphics2D g2d = (Graphics2D) g;
CubicCurve2D cubcurve = new CubicCurve2D.Float(30, 400, 150, 400, 200, 500, 350, 450);
g2d.draw(cubcurve);
}
}</source>



== QuadCurve2D.Float ==



<source lang="java">
import java.awt.Frame;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.geom.QuadCurve2D;
public class ShapeSampler extends Frame {
public static void main(String[] args) {
(new ShapeSampler()).setVisible(true);
}
public ShapeSampler() {
super("Shape Sampler");
setSize(400, 550);
}
public void paint(Graphics g) {
Graphics2D g2d = (Graphics2D) g;
QuadCurve2D quadcurve = new QuadCurve2D.Float(50, 300, 320, 300, 350, 400);
g2d.draw(quadcurve);
}
}</source>



== Select a Curve To Display Its Points and Flatness Index ==



<source lang="java">
import java.awt.Canvas;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Rectangle;
import java.awt.geom.QuadCurve2D;
import java.awt.geom.Rectangle2D;
import java.util.Vector;
import javax.swing.JFrame;
public class QuadCurveControlPoint extends JFrame {
DrawingCanvas canvas = new DrawingCanvas();
public QuadCurveControlPoint() {
getContentPane().add(canvas);
setSize(500, 500);
setVisible(true);
}
public static void main(String arg[]) {
new QuadCurveControlPoint();
}
class DrawingCanvas extends Canvas {
Vector quadCurves = new Vector();
QuadCurve2D selectedCurve = null;
Rectangle2D boundingRec = null;
public DrawingCanvas() {
setSize(400, 200);
quadCurves.addElement(new QuadCurve2D.Float(20, 20, 80, 160, 120, 20));
quadCurves.addElement(new QuadCurve2D.Float(120, 100, 160, 40, 200, 180));
for (int i = 0; i < quadCurves.size(); i++) {
QuadCurve2D curve = (QuadCurve2D) quadCurves.elementAt(i);
selectedCurve = curve;
boundingRec = curve.getBounds2D();
System.out.println(selectedCurve.getX1());
System.out.println(selectedCurve.getY1());
System.out.println(selectedCurve.getCtrlX());
System.out.println(selectedCurve.getCtrlY());
System.out.println(selectedCurve.getX2());
System.out.println(selectedCurve.getY2());
double flatness = selectedCurve.getFlatness();
System.out.println(flatness);
}
}
public void paint(Graphics g) {
Graphics2D g2D = (Graphics2D) g;
for (int i = 0; i < quadCurves.size(); i++) {
g2D.draw((QuadCurve2D) quadCurves.elementAt(i));
}
if (boundingRec != null) {
drawHighlightSquares(g2D, boundingRec);
}
}
public void drawHighlightSquares(Graphics2D g2D, Rectangle2D r) {
double x = r.getX();
double y = r.getY();
double w = r.getWidth();
double h = r.getHeight();
g2D.setColor(Color.black);
g2D.fill(new Rectangle.Double(x - 3.0, y - 3.0, 6.0, 6.0));
g2D.fill(new Rectangle.Double(x + w * 0.5 - 3.0, y - 3.0, 6.0, 6.0));
}
}
}</source>

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Java Tutorial/2D Graphics/Curve - История изменений

в 17:44, 31 мая 2010

Admin: 1 версия