本文介绍了蟒蛇 - 2个数学题的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

嘿,我正在使用pyGame,我想:

A)创建一个返回两点之间角度的函数。我试着用math.atan2来做这件事,我得到了非常奇怪的回报。我试了这两个(三角洲X,deltaY)和(deltaY,deltaX)。有什么建议吗?B
$ b B)给出一个长度和一个角度,使用这两个从0返回一个点。
例如,LengthDir(2,45)使用(长度,角度)将返回(2,2)。



感谢您的帮助。我在互联网上搜索了所有东西,找不到任何东西来帮助我......

返回。如果您需要学位,请将结果乘以180 /π。

  def A(dx,dy):
return math.atan2(dy,dx)* 180 / math.pi

类似地,所有三角函数 math 以弧度操作。如果你输入一个学位,你需要先乘以π/ 180。

  def LengthDir(length,angle):
radian_angle = angle * math.pi / 180
return(length * math.cos(radian_angle),length * math.sin(radian_angle))

Python提供了方便的函数和所以你不需要记住180 /π的常数。

 def A(dx,dy):
返回math.degrees(math.atan2(dy,dx))

定义长度(长度,角度):
radian_angle = math.radians(angle)
return(length * math.cos(radian_angle),length * math.sin(radian_angle))


Hey, I'm using pyGame and I want to:

A) make a function that returns the angle between two points. I've tried doing this with math.atan2 and I'm getting really wierd returns. I tried this with both (delta X, deltaY) and (deltaY, deltaX). Any suggestions?

B) given a length and an angle, return a point using those two from 0.For example, LengthDir(2,45) using (length,angle) would return (2,2).

Thanks for the help. I've searched all over the internet and I couldn't find anything to help me...

解决方案

math.atan2 returns radians. If you need degree, multiply the result by 180/π.

def A(dx, dy):
  return math.atan2(dy, dx) * 180 / math.pi

Similarly, all trigonometric functions in math operate in radians. If you input a degree, you need to multiply by π/180 first.

def LengthDir(length, angle):
  radian_angle = angle * math.pi / 180
  return (length * math.cos(radian_angle), length * math.sin(radian_angle))

Python provides the convenient functions math.degrees and math.radians so you don't need to memorize the constant 180/π.

def A(dx, dy):
  return math.degrees( math.atan2(dy, dx) )

def LengthDir(length, angle):
  radian_angle = math.radians(angle)
  return (length * math.cos(radian_angle), length * math.sin(radian_angle))

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10-29 13:49