AutoLISP绘制三维螺旋楼梯..doc

AutoLISP 绘制三维螺旋楼梯 　　一、〖说明〗 　　本例程能够绘制建筑中的三维螺旋楼梯。根据指定的参数：圆心点、梯级高、最窄梯级宽、楼梯宽度、扶手高、底板厚度和层高，程序将自动计算并绘制出以3dface和tabsurf组成的三维螺旋楼梯模型。程序能在R12至R14版的AutoCAD中运行。 二、〖安装〗 　　将程序代码一节的文本裁剪下来，保存成名为3DSP.LSP的文本文件；将这个文件拷贝到AutoCAD的系统目录中。 三、〖使用〗 　　在AutoCAD命令行键入：(load 3dsp)然后执行：3dsp，按程序中的提示操作即可。(程序中的提示已改为中文，若需要英文提示可自行修改提示字符串或跟我联系） 四、〖程序代码〗 ;;;begain 3dsp.lsp (defun dtr (r) (* r (/ pi 180.0))) (defun rtd (r) (* r (/ 180.0 pi))) (defun 3dsp_err (s) (if (not (member s (list console break Function cancelled quit/exit abort))) (princ (strcat \n3DSP Error: s)) ) (if cmd (setvar cmdecho cmd)) (if bli (setvar blipmode bli)) (if cla (setvar clayer cla)) (if os1 (setvar osmode os1)) (princ) ) (defun spinfo (/ ht) ; staircase parameter (setq cp (getpoint \n螺旋梯圆心点: ) lp (getpoint cp \n首级内圆起始点: ) riser (getdist \n梯级高: ) step (getdist \n内圆最窄梯级宽: ) wide (getdist \n楼梯宽度: ) hrl (getdist \n扶手高: ) thi (getdist \n底板厚度: ) ht (getdist \n层高: ) case (fix (/ ht riser)) riser (/ ht case) ls (sqrt (+ (expt riser 2) (expt step 2))) a (/ riser ls) ; sin A b (/ step ls) ; cos A c lp ) ); end SPINFO (defun spcalc (/ os1) (setq os1 (getvar osmode)) (initget L R B N) (setq ans (getkword \n选择扶手(L)左/(R)右/(B)双边/(N)无: )) (if (not ans)(setq ans N)) (setq blksp (open blksp.lst r)) (if (not (equal blksp nil)) (setq blk (read-line blksp)) ) (if (equal blk nil) (setq blk sp1) (setq blk (strcat sp (itoa (1+ (atoi (substr blk 3))))) ) ) (setq r (distance cp lp)) (setq ang (/ step r)) ; determines the angle of the step (setq ac (angle cp lp)) (setq rp (polar lp ac wide) lp1 (list (car lp) (cadr lp) riser) lp4 (list (car rp) (cadr rp) riser) count 0 el riser al ang ) (setq diag (+ ac ang)) (setq lp2 (list (car (polar cp diag r)) (cadr (polar cp diag r)) riser) lp3 (list (car (polar cp diag (+ r wide))) (cadr (polar cp diag (+ r wide))) riser) lh (polar cp (+ ac (/ ang 2)) (+ r (/ wide 15))) ; left bottom hrl lh1 (list (car lh) (cadr lh) (+ (caddr lh) riser)) lh2 (list (car lh1) (cadr lh1) (+ (caddr lh1) hrl)); left top hrl sht (polar