cocos2d for iPhone

A fast, easy to use, free, and community supported 2D game engine

1. 

   hamstachasa
   Member

   I am using CGRectIntersectsRect to detect collisions in my game. It is a scrolling game, and I can't get my bounding box to match up with where it is supposed to be. What i am looking for is a way to make these CGRects (bounding boxes) visible. I tried doing the following:

   -(void) drawBoundingBox: (CGRect) rect;
   {
       CGPoint vertices[4]={
           ccp(rect.origin.x,rect.origin.y),
           ccp(rect.origin.x+rect.size.width,rect.origin.y),
           ccp(rect.origin.x+rect.size.width,rect.origin.y+rect.size.height),
           ccp(rect.origin.x,rect.origin.y+rect.size.height),
       };
       ccDrawPoly(vertices, 4, YES);
   }

   But it isn't showing up. What am I doing wrong? Cheers!

   Posted 8 months ago #
2. 

   toadkick
   Member

   If you just set CC_SPRITE_DEBUG_DRAW and/or CC_SPRITEBATCHNODE_DEBUG_DRAW to 1 in ccConfig.h it will draw the bounding boxes for all of your sprites

   Posted 8 months ago #
3. 

   zaaroth
   Member

   You arent doing tutorials nor manuals. That's plain wrong.

   Posted 8 months ago #
4. 

   hamstachasa
   Member

   Thanks toadkick, that shows me the actual bounding boxes for the CCSprites. However, I am creating CGRects to check for the collision- is there any way to draw these? Cheers!

   Posted 8 months ago #
5. 

   siddharthshekar
   Member

   hey hamstachasa if you are still looking for the solution... he is what I did which worked

   paste below in HelloWorldLayer.h

   create 2 variables as below
   CGRect ballrect, basketrect;

   and
   -(void) drawBoundingBox: (CGRect) rect

   then in HelloWorldLayer.mm or HelloWorldLayer.m

   -(void) drawBoundingBox: (CGRect) rect
   {
   CGPoint vertices[4]={
   ccp(rect.origin.x,rect.origin.y),
   ccp(rect.origin.x+rect.size.width,rect.origin.y),
   ccp(rect.origin.x+rect.size.width,rect.origin.y+rect.size.height),
   ccp(rect.origin.x,rect.origin.y+rect.size.height),
   };
   ccDrawPoly(vertices, 4, YES);
   }

   -(void) draw
   {
   glDisable(GL_TEXTURE_2D);
   glDisableClientState(GL_COLOR_ARRAY);
   glDisableClientState(GL_TEXTURE_COORD_ARRAY);

   _world->DrawDebugData();

   glColor4f(1.0, 0, 0, 1.0);
   glLineWidth(1.0f);

   [self drawBoundingBox: basketrect];
   [self drawBoundingBox: ballrect];

   glEnable(GL_TEXTURE_2D);
   glEnableClientState(GL_COLOR_ARRAY);
   glEnableClientState(GL_TEXTURE_COORD_ARRAY);

   [super draw];
   }

   Posted 6 months ago #

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