Optimizations:

 * Allow overrides of sin/cos functions, also makes them locals.
 * Only make one created array per bullet, and don't extend it with empty things.
 * Local cache for action.owner and action.params.

diff --git a/bulletml/impl.py b/bulletml/impl.py
index 8f94d5569e02e5d91b5b3e3f751cf881b96491a7..f3d7e12ca4d9120372f208b6db9c74e74a02e7b7 100644 (file)
--- a/bulletml/impl.py
+++ b/bulletml/impl.py
@@ -61,9 +61,9 @@ class Action(object):
         self.previous_fire_direction = other.previous_fire_direction
         self.previous_fire_speed = other.previous_fire_speed
 
-    def step(self, owner, rank):
+    def step(self, owner, rank, created, sin=math.sin, cos=math.cos):
         """Advance by one frame."""
-        created = []
+        s_params = self.params
 
         if self.speed_frames > 0:
             self.speed_frames -= 1
@@ -86,11 +86,11 @@ class Action(object):
             owner.my += self.my
 
         if self.pc is None:
-            return created
+            return
 
         if self.wait_frames > 0:
             self.wait_frames -= 1
-            return created
+            return
 
         while True:
             self.pc += 1
@@ -111,21 +111,21 @@ class Action(object):
                     action = self.actions[self.pc]
 
             if isinstance(action, parser.Repeat):
-                repeat, (actions, params) = action(self.params, rank)
+                repeat, (actions, params) = action(s_params, rank)
                 child = Action(owner, self, actions, params, rank, repeat)
                 owner.replace(self, child)
-                created.extend(child.step(owner, rank))
+                child.step(owner, rank, created, sin, cos)
                 break
 
             elif isinstance(action, (parser.ActionDef, parser.ActionRef)):
-                actions, params = action(self.params, rank)
+                actions, params = action(s_params, rank)
                 child = Action(owner, self, actions, params, rank)
                 owner.replace(self, child)
-                created.extend(child.step(owner, rank))
+                child.step(owner, rank, created, sin, cos)
                 break
 
             elif isinstance(action, (parser.FireDef, parser.FireRef)):
-                direction, speed, actions, offset = action(self.params, rank)
+                direction, speed, actions, offset = action(s_params, rank)
                 if direction:
                     direction, type = direction
                     if type == "aim" or type is None:
@@ -155,12 +155,12 @@ class Action(object):
 
                 x, y = owner.x, owner.y
                 if offset:
-                    off_x, off_y = offset(self.params, rank)
+                    off_x, off_y = offset(s_params, rank)
                     if offset.type == "relative":
-                        sin = math.sin(direction)
-                        cos = math.cos(direction)
-                        x += cos * off_x + sin * off_y
-                        y += sin * off_x - cos * off_y
+                        s = sin(direction)
+                        c = cos(direction)
+                        x += c * off_x + s * off_y
+                        y += s * off_x - c * off_y
                     else:
                         x += off_x
                         y += off_y
@@ -170,7 +170,7 @@ class Action(object):
                 created.append(bullet)
 
             elif isinstance(action, parser.ChangeSpeed):
-                frames, (speed, type) = action(self.params, rank)
+                frames, (speed, type) = action(s_params, rank)
                 self.speed_frames = frames
                 if type == "sequence":
                     self.speed = speed
@@ -180,32 +180,25 @@ class Action(object):
                     self.speed = (speed - owner.speed) / frames
 
             elif isinstance(action, parser.ChangeDirection):
-                frames, (direction, type) = action(self.params, rank)
+                frames, (direction, type) = action(s_params, rank)
                 self.direction_frames = frames
                 self.aiming = False
                 if type == "sequence":
                     self.direction = direction
                 else:
                     if type == "absolute":
-                        self.direction = (
-                            direction - owner.direction) % PI_2
+                        direction -= owner.direction
                     elif type == "relative":
-                        self.direction = direction
+                        direction = direction
                     else:
                         self.aiming = True
-                        self.direction = (
-                            direction
-                            + owner.aim
-                            - owner.direction) % PI_2
+                        direction += owner.aim - owner.direction
 
-                    if self.direction > math.pi:
-                        self.direction -= PI_2
-                    if self.direction < -math.pi:
-                        self.direction += PI_2
-                    self.direction /= self.direction_frames
+                    self.direction = (
+                        (direction + math.pi) % PI_2 - math.pi) / frames
 
             elif isinstance(action, parser.Accel):
-                frames, horizontal, vertical = action(self.params, rank)
+                frames, horizontal, vertical = action(s_params, rank)
                 self.accel_frames = frames
                 if horizontal:
                     mx, type = horizontal
@@ -234,15 +227,13 @@ class Action(object):
                     pass
 
             elif isinstance(action, parser.Wait):
-                self.wait_frames = action(self.params, rank)
+                self.wait_frames = action(s_params, rank)
                 break
 
             elif isinstance(action, parser.Vanish):
                 owner.vanish()
                 break
 
-        return created
-
 class Bullet(object):
     """Simple bullet implementation.
 
@@ -333,7 +324,7 @@ class Bullet(object):
         else:
             self._actions[idx] = new
 
-    def step(self):
+    def step(self, sin=math.sin, cos=math.cos):
         """Advance by one frame.
 
         This updates the position and velocity, and may also set the
@@ -344,11 +335,11 @@ class Bullet(object):
         created = []
 
         for action in self._actions:
-            created.extend(action.step(self, self.rank))
+            action.step(self, self.rank, created, sin, cos)
 
         self.px = self.x
         self.py = self.y
-        self.x += self.mx + math.sin(self.direction) * self.speed
-        self.y += self.my - math.cos(self.direction) * self.speed
+        self.x += self.mx + sin(self.direction) * self.speed
+        self.y += self.my - cos(self.direction) * self.speed
 
         return created