1
我需要计算线的方向矢量的笛卡尔方程。用户可以像这样自由旋转视角。来看旋转后的线位置 - 旋转
点
来看
点2
这将是容易,如果我知道两点的线,但我无法检索点的旋转后正确的位置,似乎线的位置保持不变,我不太了解Graphics2D如何旋转works.Here是一块代码。
g3.rotate(Math.toRadians(Double.valueOf(getJtfRotationAngle().getText()))
,eye.getEyePos().getX_pos()
,eye.getEyePos().getY_pos());
g3.setColor(Color.BLACK);
g3.draw(new Line2D.Double(eye.getEyePos().getX_pos(),eye.getEyePos().getY_pos()
,eye.getEyePos().getX_pos()+25,eye.getEyePos().getY_pos()));
g3.draw(new Line2D.Double(eye.getEyePos().getX_pos(),eye.getEyePos().getY_pos()
,eye.getEyePos().getX_pos(),eye.getEyePos().getY_pos()+25));
//This line is the orientation vector
g3.draw(new Line2D.Double(eye.getEyePos().getX_pos()
,eye.getEyePos().getY_pos()
,eye.getEyePos().getX_pos()+25
,eye.getEyePos().getY_pos()+25));
g3.drawOval((int)eye.getEyePos().getX_pos(),(int)eye.getEyePos().getY_pos(),10,10);
g3.fillOval((int)eye.getEyePos().getX_pos(),(int)eye.getEyePos().getY_pos(),10,10);
eye.setEyeTruePos(new Point(eye.getEyePos().getX_pos()-x_pos/2,eye.getEyePos().getY_pos()-y_pos/2));
在此先感谢您的答复/解释。