From 233d543dab3f0a656d1e34ed306a08ffcee85c73 Mon Sep 17 00:00:00 2001
From: Daniel Drake <dsd@laptop.org>
Date: Sat, 30 Aug 2008 22:49:32 +0000
Subject: destroy joints when excess force is applied

---
diff --git a/bridge.py b/bridge.py
index 6dac4c7..62a0f76 100644
--- a/bridge.py
+++ b/bridge.py
@@ -5,6 +5,7 @@ class Bridge:
         self.game = game
         self.screen = game.screen
         self.world = game.world
+        self.joints = []
 
     def create_world(self):
         rect = pygame.Rect((0,800), (350, -250))
@@ -20,4 +21,13 @@ class Bridge:
 
     def joint_added(self, joint):
         print "joint added!"
+        self.joints.append(joint)
+
+    def for_each_frame(self):
+        for joint in self.joints:
+            force = joint.GetReactionForce().Length()
+            if force > 500:
+                print "destroy joint!"
+                self.world.world.DestroyJoint(joint)
+                self.joints.remove(joint)
 
diff --git a/physics.py b/physics.py
index b76db14..b2ca2cb 100644
--- a/physics.py
+++ b/physics.py
@@ -59,6 +59,9 @@ class PhysicsGame:
                 self.currentTool.handleEvents(event)
             # Clear Display
             self.screen.fill((255,255,255)) #255 for white
+
+            if self.world.run_physics:
+                self.bridge.for_each_frame()
         
             # Update & Draw World
             self.world.update()
@@ -71,6 +74,7 @@ class PhysicsGame:
             text = self.font.render("Current Tool: "+self.currentTool.name, True, (255,255,255))
             textpos = text.get_rect(left=700,top=7)
             self.screen.blit(text,textpos)  
+
             
             # Flip Display
             pygame.display.flip()  
diff --git a/tools.py b/tools.py
index 1302d8c..0bb4c90 100644
--- a/tools.py
+++ b/tools.py
@@ -451,13 +451,11 @@ class BridgeJointTool(Tool):
         if event.type != MOUSEBUTTONUP or event.button != 1:
             return
 
-        print "mouse button up"
-        bodies = self.game.world.get_bodies_at_pos(event.pos)
+        bodies = self.game.world.get_bodies_at_pos(event.pos,
+            include_static=True)
         if not bodies or len(bodies) != 2:
             return
         
-        print bodies[0]
-        print bodies[1]
         jointDef = box2d.b2RevoluteJointDef()
         jointDef.Initialize(bodies[0], bodies[1], self.to_b2vec(event.pos))
         joint = self.game.world.world.CreateJoint(jointDef)
--
cgit v0.9.1