通过缩放绕 X 轴垂直旋转形状
问题：
您有一个带有 x 和 y 轴的 2D 图形，并且希望在合并缩放功能的同时绕轴旋转形状。
解决方案：
要实现此目的，您可以使用旋转和缩放等变换来操纵形状的点。下面是一个示例，首先将形状旋转固定角度，然后按不同的比例因子对其进行缩放：
<code class="java">import java.awt.*;
import java.awt.event.*;
import java.awt.geom.AffineTransform;
import javax.swing.*;
public class ShapeRotationScaling extends JPanel implements ActionListener {
private static final int ANGLE_INCREMENT = 1; // in degrees
private static final double SCALE_INCREMENT = 0.1;
private int[] shapeXPoints = {200, 200, 240, 240, 220, 220, 200};
private int[] shapeYPoints = {200, 260, 260, 240, 240, 200, 200};
private AffineTransform transform = new AffineTransform();
private double rotationAngle = 0;
private double scaleFactor = 1;
private Timer timer = new Timer(100, this);
public ShapeRotationScaling() {
this.setPreferredSize(new Dimension(700, 700));
this.setBackground(Color.white);
timer.start();
}
@Override
public void actionPerformed(ActionEvent event) {
// Rotate the shape around the x-axis
transform.rotate(Math.toRadians(rotationAngle), this.getWidth() / 2, 0);
// Scale the shape
transform.scale(scaleFactor, scaleFactor);
// Increment the rotation angle and scale factor
rotationAngle += ANGLE_INCREMENT;
scaleFactor += SCALE_INCREMENT;
repaint();
}
@Override
public void paintComponent(Graphics g) {
super.paintComponent(g);
Graphics2D g2d = (Graphics2D) g;
g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
// Draw the x and y axes
g2d.drawLine(this.getWidth() / 2, 0, this.getWidth() / 2, this.getHeight());
g2d.drawLine(0, this.getHeight() / 2, this.getWidth(), this.getHeight() / 2);
// Apply the transformation to the shape and draw it
Shape rotatedAndScaledShape = transform.createTransformedShape(new Polygon(shapeXPoints, shapeYPoints, shapeXPoints.length));
g2d.draw(rotatedAndScaledShape);
}
public static void main(String[] args) {
JFrame frame = new JFrame("Shape Rotation and Scaling");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
ShapeRotationScaling sr = new ShapeRotationScaling();
frame.add(sr);
frame.pack();
frame.setVisible(true);
}
}</code>以上是如何在 Java 中绕 X 轴旋转和缩放 2D 形状？的详细内容。更多信息请关注PHP中文网其他相关文章！
