CAD中怎么用lisp语言得到直线的倾斜角度

CAD

在CAD设计中，有时候会需要得到直线的倾斜角度。通常情况下，我们可以通过计算两条直线的斜率和截距来得到倾斜角度。首先，在CAD软件中选择要测试倾斜角度的直线，在命令行输入“LISP程序”，然后输入以下LISP程序代码：(defun line-slope-test (line) "测试直线倾斜角度" (setq x1 (line-x1 line)) (setq y1 (line-y1 line)) (setq x2 (line-x2 line)) (setq y2 (line-y2 line)) (setq slope (sqrt (+ (* x2 x2) (* -1 y2 y2)) / (+ * x1 x1) (* -1 y1 y1))) (condition-case nil (format t "斜率为~A,截距为~A" slope 0) (format t "斜率为~A,截距为~A,倾斜角度为~A" slope 0 slope (arctan2 (ABS slope) (sqrt (-1 (* slope slope) (+ (* x2 x2) (* -1 y2 y2))))))))(defun line-slope-test-2 (line) "测试直线倾斜角度" (setq x1 (line-x1 line)) (setq y1 (line-y1 line)) (setq x2 (line-x2 line)) (setq y2 (line-y2 line)) (setq slope (sqrt (+ (* x2 x2) (* -1 y2 y2)) / (+ * x1 x1) (* -1 y1 y1))) (if (= slope 0) (format t "该直线是水平的") (format t "该直线是垂直的") (+ (* slope slope) (+ (* x2 x2) (* -1 y2 y2)))/(* (1 + (* slope slope)) (ABS slope)))))在命令行输入以上代码后，按回车键即可。然后，在CAD软件中选择要测试倾斜角度的直线，在命令行输入“LISP程序”，然后输入以下LISP程序代码：(defun line-intercept-test (line) "测试直线截距" (setq x1 (line-x1 line)) (setq y1 (line-y1 line)) (setq x2 (line-x2 line)) (setq y2 (line-y2 line)) (setq a (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 / (1 /