3.1 旋转布置

旋转布置只需要在原脚本中的末尾部分添加一行代码，即可实现旋转布置效果。

旋转布置时，第一次点击鼠标左键为选择布置原点，此时移动鼠标，组件会跟随鼠标发生转动，再次点击鼠标左键时，组件会根据点击位置绕原点旋转相应角度布置。

示例：

from pyp3d import *
class 立方体(Component):
    def __init__(self):
        Component.__init__(self)
        self['长'] = Attr(1000.0, obvious=True)
        self['宽'] = Attr(300.0, obvious=True)
        self['高'] = Attr(500, obvious = True)
        self['立方体'] = Attr(None, show=True)
        self['旋转角度'] = Attr(0,obvious = True)
        self['X'] = Attr(0.0, obvious=True)
        self['Y'] = Attr(0.0, obvious=True)
        self['Z'] = Attr(0.0, obvious=True)
        self.replace()
    @export
    def replace(self):
        L = self['长']
        W = self['宽']
        H = self['高']
        x = self['X']
        y = self['Y']
        z = self['Z']
        Angle = self['旋转角度']
        TestCube = translate(x,y,z) * rotation(math.pi/180 * Angle) * scale(L,W,H) * Cube()
        self['立方体'] = TestCube
if __name__ == "__main__":
    # 只需加上下面两行即可实现旋转布置
    # 第一行 对【立方体】这个class进行装饰
    FinalGeometry = 立方体()
    # 第二行 实现旋转布置 注意最后Place时需要填入的是装饰后的立方体
    RotationPlace.RotationFunction(FinalGeometry)
    place(FinalGeometry)

图4.1-1

图4.1-2

图4.1-3