CAD中快速绘制复杂曲线
CAD中快速绘制复杂嵊髭驰亘曲线
!其实很简单，举个例子，如画机翼。
原理很简单，模拟手动输入命令，如果肯花心思，一定能很快明白的。
1，打开CAD在命令行粘贴下面数据，
2，复制从spl到最后一行1,0
spl
1,0
0.95,0.0147
0.9,0.0271
0.8,0.0489
0.7,0.0669
0.6,0.0814
0.5,0.0919
0.4,0.098
0.3,0.0976
0.25,0.0941
0.2,0.088
0.15,0.0789
0.1,0.0659
0.075,0.0576
0.05,0.0473
0.025,0.0339
0.0125,0.0244
0,0
0.0125,-0.0143
0.025,-0.0195
0.05,-0.0249
0.075,-0.0274
0.1,-0.0286
0.15,-0.0288
0.2,-0.0274
0.25,-0.025
0.3,-0.0226
0.4,-0.018
0.5,-0.014
0.6,-0.01
0.7,-0.0065
0.8,-0.0039
0.9,-0.0022
0.95,-0.0016
1,0
3，空格
指定起点切向:方向为x轴正向，空格
指定端点切向: 方向为x轴正向，空格
4，F2则会看到下面的数据
命令: spl
SPLINE
指定第一个点或[对象(O)]: 1,0
指定下一点: 0.95,0.0147
指定下一点或[闭合(C)/拟合公差(F)] <起点切向>: 0.9,0.0271
指定下一点或[闭合(C)/拟合公差(F)] <起点切向>: 0.8,0.0489
指定下一点或[闭合(C)/拟合公差(F)] <起点切向>: 0.7,0.0669
指定下一点或[闭合(C)/拟合公差(F)] <起点切向>: 0.6,0.0814
指定下一点或[闭合(C)/拟合公差(F)] <起点切向>: 0.5,0.0919
指定下一点或[闭合(C)/拟合公差(F)] <起点切向>: 0.4,0.098
指定下一点或[闭合(C)/拟合公差(F)] <起点切向>: 0.3,0.0976
指定下一点或[闭合(C)/拟合公差(F)] <起点切向>: 0.25,0.0941
指定下一点或[闭合(C)/拟合公差(F)] <起点切向>: 0.2,0.088
指定下一点或[闭合(C)/拟合公差(F)] <起点切向>: 0.15,0.0789
指定下一点或[闭合(C)/拟合公差(F)] <起点切向>: 0.1,0.0659
指定下一点或[闭合(C)/拟合公差(F)] <起点切向>: 0.075,0.0576
指定下一点或[闭合(C)/拟合公差(F)] <起点切向>: 0.05,0.0473
指定下一点或[闭合(C)/拟合公差(F)] <起点切向>: 0.025,0.0339
指定下一点或[闭合(C)/拟合公差(F)] <起点切向>: 0.0125,0.0244
指定下一点或[闭合(C)/拟合公差(F)] <起点切向>: 0,0
指定下一点或[闭合(C)/拟合公差(F)] <起点切向>: 0.0125,-0.0143
指定下一点或[闭合(C)/拟合公差(F)] <起点切向>: 0.025,-0.0195
指定下一点或[闭合(C)/拟合公差(F)] <起点切向>: 0.05,-0.0249
指定下一点或[闭合(C)/拟合公差(F)] <起点切向>: 0.075,-0.0274
指定下一点或[闭合(C)/拟合公差(F)] <起点切向>: 0.1,-0.0286
指定下一点或[闭合(C)/拟合公差(F)] <起点切向>: 0.15,-0.0288
指定下一点或[闭合(C)/拟合公差(F)] <起点切向>: 0.2,-0.0274
指定下一点或[闭合(C)/拟合公差(F)] <起点切向>: 0.25,-0.025
指定下一点或[闭合(C)/拟合公差(F)] <起点切向>: 0.3,-0.0226
指定下一点或[闭合(C)/拟合公差(F)] <起点切向>: 0.4,-0.018
指定下一点或[闭合(C)/拟合公差(F)] <起点切向>: 0.5,-0.014
指定下一点或[闭合(C)/拟合公差(F)] <起点切向>: 0.6,-0.01
指定下一点或[闭合(C)/拟合公差(F)] <起点切向>: 0.7,-0.0065
指定下一点或[闭合(C)/拟合公差(F)] <起点切向>: 0.8,-0.0039
指定下一点或[闭合(C)/拟合公差(F)] <起点切向>: 0.9,-0.0022
指定下一点或[闭合(C)/拟合公差(F)] <起点切向>: 0.95,-0.0016
指定下一点或[闭合(C)/拟合公差(F)] <起点切向>: 1,0
指定下一点或[闭合(C)/拟合公差(F)] <起点切向>:
指定起点切向:
指定端点切向:
4，可能会失败多试几次。第一次画时，粘贴完后。连按三次空格，按z----空格----e-----空格
则的到第一次画出来的机翼，一般会画错。删掉从新画。