Add isTouching() method

slither/__init__.py

@@ -73,6 +73,7 @@ def costumeNumber(self):
     def costumeNumber(self, val):
         val = val % len(self.costumes)
         self.costumeName = list(self.costumes.keys())[val]
+        self.currentCostume = self.costumes[self.costumeName]
         self._costumeNumber = val
 
     @property
@@ -83,10 +84,7 @@ def costumeName(self):
     @costumeName.setter
     def costumeName(self, val):
         if val in self.costumes:
-            self.recalculateCostumeDataFromName(val)
-
-    def recalculateCostumeDataFromName(self, name):
-            self._costumeName = name
+            self._costumeName = val
             self.currentCostume = self.costumes[self.costumeName]
 
 
@@ -136,6 +134,14 @@ def delete(self):
         '''Remove the sprite from the global sprites list, causing it not to be drawn.'''
         sprites.remove(self)
 
+    def isTouching(self, collideSprite):
+        '''Detects if one sprite is touching another.'''
+        ourRect = self.currentCostume.get_rect()
+        theirRect = collideSprite.currentCostume.get_rect()
+        ourRect.center = (self.xpos, self.ypos)
+        theirRect.center = (collideSprite.xpos, collideSprite.ypos)
+        return ourRect.colliderect(theirRect)
+
 pygame.mixer.init(44100, -16, 2, 2048)
 
 class Sound():

slither/tests/isTouchingTest.py

@@ -0,0 +1,20 @@
+# isTouchingTest.py
+import slither
+
+toucher = slither.Sprite()
+toucher.addCostume("assets/arrow.png", "arrow")
+toucher.costumeName = "arrow"
+toucher.goto(0, 100)
+
+snakey = slither.Sprite()
+snakey.goto(slither.WIDTH // 2, 100)
+
+def run_a_frame():
+    toucher.moveSteps(3)
+    if toucher.isTouching(snakey):
+        print("Touching!")
+    else:
+        print("Not touching.")
+
+slither.setup()
+slither.runMainLoop(run_a_frame)

slither/tests/moveStepsTest.py

@@ -12,4 +12,4 @@ def run_a_frame():
 
 slither.setup()
 slither.setFPS(30) # Slow slither down
-slither.runMainLoop(run_a_frame)
+slither.runMainLoop(run_a_frame)