Book Image

Python Game Programming By Example

Book Image

Python Game Programming By Example

Overview of this book

Table of Contents (14 chapters)
Python Game Programming By Example
About the Authors
About the Reviewers

Gravitation game

To put into practice what you have learned about steering behaviors, we will build a basic game. The player's objective is to collect some pickup items that rotate around different planets placed in the world, while escaping from enemies. The enemies are non-playable characters that seek the playable character and avoid the planets.

We will represent the characters as particle systems, and the final version of the game will look like this:

Basic game objects

As usual, we will define a base class that wraps the access to the CircleShape attribute with the updated center:

from cocos.cocosnode import CocosNode
from cocos.director import director
import cocos.collision_model as cm

class Actor(CocosNode):
    def __init__(self, x, y, r):
        super(Actor, self).__init__()
        self.position = (x, y)
        self._cshape = cm.CircleShape(self.position, r)

    def cshape(self): = eu.Vector2(self.x, self.y)
        return self._cshape...