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2016-07-31 07:22:27 +08:00
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CustomView/Advance/[9]Matrix_Basic.md
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@@ -188,6 +188,43 @@ $$)
![](http://ww4.sinaimg.cn/large/005Xtdi2jw1f6cnkwyksij308c0dwq3f.jpg) ![](http://ww4.sinaimg.cn/large/005Xtdi2jw1f6cnkwyksij308c0dwq3f.jpg)
#### 复合错切
> 水平错切和垂直错切的复合。
![](http://latex.codecogs.com/png.latex?$$ x = x_0 + k_1 y_0 $$)
![](http://latex.codecogs.com/png.latex?$$ y = k_2 x_0 + y_0 $$)
用矩阵表示:
![](http://latex.codecogs.com/png.latex?
$$
\\left [
\\begin{matrix}
x\\\\
y\\\\
1
\\end{1}
\\right ]
=
\\left [
\\begin{matrix}
1 & k_1 & 0 \\\\
k_2 & 1 & 0 \\\\
0 & 0 & 1
\\end{1}
\\right ]
\\left [
\\begin{matrix}
x_0\\\\
y_0\\\\
1
\\end{1}
\\right ]
$$)
### 3.旋转 ### 3.旋转
假定一个点 A(x<sub>0</sub>, y<sub>0</sub>) ,距离原点距离为 r, 与水平轴夹角为 α 度, 绕原点旋转 θ 度, 旋转后为点 B(x, y) 如下: 假定一个点 A(x<sub>0</sub>, y<sub>0</sub>) ,距离原点距离为 r, 与水平轴夹角为 α 度, 绕原点旋转 θ 度, 旋转后为点 B(x, y) 如下: