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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:
- 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() + ")"); } }
- 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() +