X-Git-Url: https://git.ctpug.org.za/?a=blobdiff_plain;f=tabakrolletjie%2Fobstacles.py;h=b368626431994464b7f7650ea60971ac471ecce0;hb=403f74bb5689f3231a1e23b500a09aee35259b57;hp=e69de29bb2d1d6434b8b29ae775ad8c2e48c5391;hpb=f3600c28cd6e96abe7c0916860b0cc56b444545f;p=tabakrolletjie.git

diff --git a/tabakrolletjie/obstacles.py b/tabakrolletjie/obstacles.py
index e69de29..b368626 100644
--- a/tabakrolletjie/obstacles.py
+++ b/tabakrolletjie/obstacles.py
@@ -0,0 +1,63 @@
+""" Obstacles for light and space mould. """
+
+import pymunk
+import pymunk.pygame_util
+import pygame.draw
+
+from .constants import OBSTACLE_CATEGORY
+
+OBSTACLE_FILTER = pymunk.ShapeFilter(categories=OBSTACLE_CATEGORY)
+
+
+class ObstacleManager(object):
+    """ Manages a set of obstacles. """
+
+    def __init__(self, space, gamestate):
+        self._space = space
+        self._obstacles = [
+            BaseObstacle.load(cfg) for cfg in gamestate.station["obstacles"]]
+        for obs in self._obstacles:
+            obs.add(self._space)
+
+    def render(self, surface):
+        for obs in self._obstacles:
+            obs.render(surface)
+
+
+class BaseObstacle(object):
+    def __init__(self):
+        self.body = pymunk.Body(0, 0, pymunk.body.Body.STATIC)
+        self.shapes = []
+
+    def add(self, space):
+        if self.body.space is not None:
+            space.remove(self.body, *self.body.shapes)
+        for shape in self.shapes:
+            shape.filter = OBSTACLE_FILTER
+        space.add(self.body, *self.shapes)
+
+    def render(self, surface):
+        raise NotImplementedError("Obstacles should implement .render().")
+
+    @classmethod
+    def load(cls, config):
+        kw = config.copy()
+        obstacle_type = kw.pop("type")
+        [obstacle_class] = [
+            c for c in cls.__subclasses__()
+            if c.__name__.lower() == obstacle_type]
+        return obstacle_class(**kw)
+
+
+class Wall(BaseObstacle):
+
+    def __init__(self, vertices):
+        super(Wall, self).__init__()
+        self.shapes.append(pymunk.Poly(self.body, vertices))
+
+    def render(self, surface):
+        for shape in self.shapes:
+            pygame_poly = [
+                pymunk.pygame_util.to_pygame(v, surface) for v in
+                shape.get_vertices()]
+            pygame.draw.polygon(surface, (0, 0, 0), pygame_poly)