Question

我试图通过设置x并找到y，然后通过设置x来简单地按y {{1}}进行扩展。如何用Python表达这个公式（为了便于阅读）。我试图将这个盒子放在一个更大的盒子里面，这样内盒子总能放在更大的盒子里面。

Answer 1

new_y = (float(new_x) / x) * y

或

new_x = (float(new_y) / y) * x

Answer 2

注意：我不是真的做Python，所以这是伪代码。

你需要的是两个盒子的相对宽高比，因为它确定哪个新轴必须与新盒子的大小相同：

r_old = old_w / old_h
r_new = new_w / new_h

if (r_old > r_new) then
   w = new_w              // width of mapped rect
   h = w / r_old          // height of mapped rect
   x = 0                  // x-coord of mapped rect
   y = (new_h - h) / 2    // y-coord of centered mapped rect
else
   h = new_h
   w = h * r_old
   y = 0
   x = (new_w - w) / 2
endif

Answer 3

>>> import fractions
>>> x, y = 10, 10
>>> fix_rat = fractions.Fraction(x, y)
>>> fix_rat
Fraction(1, 1)
>>> x = 8
>>> if fractions.Fraction(x, y) != fix_rat:
    y = x / fix_rat #well instead of y you should put the last one that has been changed
                    #but this is just an example


>>> y
Fraction(8, 1)
>>>

如何按比例（尊重纵横比）缩放矩形？

3 个答案: