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[英]How do i find the smallest point P(x,y) containing triangle from a bunch of points?
[英]How do I find all points of an isosceles triangle given the vertex point, base midpoint, and base width?
找到B
和C
:
a_mA = (A - a_m)/|A - a_m|
a_mA
正交的向量–我們稱它為a_mA'
a_mA' = (-a_mA.y, a_mA.x)
B
,沿a_mA'
的方向將步長width/2
單位加上a_m
:
B = (width/2)*a_mA' + a_m
C
,在a_mA'
的方向上以步長-width/2
單位並添加a_m
:
C = (-width/2)*a_mA' + a_m
JsFiddle示例: https ://jsfiddle.net/asq7h2jd/
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