Add turnips to the space and check for collisions when planting them

[tabakrolletjie.git] / tabakrolletjie / turnip.py

diff --git a/tabakrolletjie/turnip.py b/tabakrolletjie/turnip.py
index b53d451f3705a707a5ceec55bab04eb551bd4f43..27cb4de9b20c3f3af8da42fe24b347c051fcb8ec 100644 (file)
--- a/tabakrolletjie/turnip.py
+++ b/tabakrolletjie/turnip.py
@@ -1,14 +1,37 @@
 # Brassica rapa extraterrestrialus, the common space turnip
 
+import pymunk
+import pymunk.pygame_util
+import pygame.display
+
 from .loader import loader
+from .constants import TURNIP_CATEGORY, LIGHT_CATEGORY
 import random
 
+TURNIP_FILTER = pymunk.ShapeFilter(
+    mask=pymunk.ShapeFilter.ALL_MASKS ^ LIGHT_CATEGORY,
+    categories=TURNIP_CATEGORY)
+
+
+class TurnipInvalidPosition(Exception):
+    pass
+
+
 class Turnip(object):
 
     def __init__(self, **kwargs):
         self._age = kwargs.get('age', 0)
         self._pos = kwargs.get('pos', (0, 0))
+        space = kwargs.get('space', None)
         self._update_image()
+        self._body = pymunk.Body(0, 0, pymunk.Body.STATIC)
+        self._shape = pymunk.Circle(self._body, 16)
+        self._shape.filter = TURNIP_FILTER
+        self._body.position = pymunk.pygame_util.from_pygame(
+            self._pos, pygame.display.get_surface())
+        if space.shape_query(self._shape):
+            raise TurnipInvalidPosition()
+        space.add(self._body, self._shape)
 
     def _update_image(self):
         self._image = loader.load_image('32', 'turnip%d.png' % (self._age + 1))
@@ -19,6 +42,10 @@ class Turnip(object):
     def serialize(self):
         return {'age': self._age, 'pos': self._pos}
 
+    def remove(self):
+        # FIXME: Remove body from the space
+        pass
+
     def grow(self):
         self._age += 1
         if self._age >= 3: