def draw(self):
"""Draws the planet and its orbit
OpenGL-only function. Override the Ball draw function, as the orbit
also has to be drawn.
"""
# Draws orbit
glColor3f(*steel_blue)
glPolygonMode(GL_FRONT_AND_BACK, GL_LINE)
glBegin(GL_POLYGON)
time = 0
while time <= self.period:
pos, _ = self.getPos(time)
coords = self.getGUICoords(pos)
glVertex3f(*coords)
time += self.period / 50
glEnd()
# Draws the planet
Ball.draw(self)
