python - 如何将 pybox2d 中的物体角度保持在 -pi 和 pi 之间？

Question

在 pybox2d manual它指出以下内容:

pybox2d uses radians for angles. The body rotation is stored in radians and may grow unbounded. Consider normalizing the angle of your bodies if the magnitude of the angle becomes too large (use b2Body.SetAngle).

但是，当我尝试实现一些东西来“标准化”角度时，我收到以下错误:

AttributeError: 'b2Body' object has no attribute 'SetAngle'

代码片段:

def update_outputs(self):

    # This is necessary to prevent the angle
    # from getting too large or small
    self.body.SetAngle(self.body.angle % 2*pi)

Answer 1

看起来自从这些文档编写以来，该库已经被 Python 化了。角度是 Body 的一个属性:

@angle.setter
def angle(self, angle):
    self._xf.angle=angle
    self._transform_updated()

您应该能够简单地设置它，例如:

def update_outputs(self):

    # This is necessary to prevent the angle
    # from getting too large or small
    self.body.angle %= 2*pi