java line2d坐标转换怎么进行

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筋斗云
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在Java中,Line2D类表示二维空间中的直线。如果你需要将Line2D对象的坐标进行转换,可以使用以下方法:

  1. 平移(Translation):

要将Line2D对象沿x轴和y轴移动到新的位置,可以使用以下代码:

import java.awt.geom.Line2D;  public class Main {     public static void main(String[] args) {         Line2D line = new Line2D.Double(1, 2, 3, 4);          // 平移向量         double dx = 5;         double dy = -3;          // 计算新的起点和终点         double newStartX = line.getX1() + dx;         double newStartY = line.getY1() + dy;         double newEndX = line.getX2() + dx;         double newEndY = line.getY2() + dy;          // 创建新的Line2D对象         Line2D newLine = new Line2D.Double(newStartX, newStartY, newEndX, newEndY);          System.out.println("原始直线: (" + line.getX1() + ", " + line.getY1() + ") - (" + line.getX2() + ", " + line.getY2() + ")");         System.out.println("平移后的直线: (" + newLine.getX1() + ", " + newLine.getY1() + ") - (" + newLine.getX2() + ", " + newLine.getY2() + ")");     } } 
  1. 缩放(Scaling):

要将Line2D对象沿x轴和y轴进行缩放,可以使用以下代码:

import java.awt.geom.Line2D;  public class Main {     public static void main(String[] args) {         Line2D line = new Line2D.Double(1, 2, 3, 4);          // 缩放因子         double scaleX = 2;         double scaleY = 0.5;          // 计算新的起点和终点         double newStartX = line.getX1() * scaleX;         double newStartY = line.getY1() * scaleY;         double newEndX = line.getX2() * scaleX;         double newEndY = line.getY2() * scaleY;          // 创建新的Line2D对象         Line2D newLine = new Line2D.Double(newStartX, newStartY, newEndX, newEndY);          System.out.println("原始直线: (" + line.getX1() + ", " + line.getY1() + ") - (" + line.getX2() + ", " + line.getY2() + ")");         System.out.println("缩放后的直线: (" + newLine.getX1() + ", " + newLine.getY1() + ") - (" + newLine.getX2() +

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