cocos2d for iPhone

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

1. 

   dnsolo
   Member

   Hi all,

   I need to draw a hollow rectangle around each sprites borders on the screen.

   This will help me to set up the correct collision detection areas.

   Does anyone know a simple way of doing this?

   Thanks,

   Dan

   Posted 2 years ago #
2. 

   pabloruiz55
   Member

   Hi!
   There is a test which comes with cocos2d that explains how to draw lines, rectangles, etc with opengl. Sorry i can't remember its name but it is there...

   Posted 2 years ago #
3. 

   dnsolo
   Member

   Thanks pabloruiz55,

   I've looked at the 'drawPrimitivesTest.m' example code and created the following code from it:

   -(void) draw
   {
   glEnable(GL_LINE_SMOOTH);
   glColor4ub(255, 0, 255, 255);
   glLineWidth(2);
   CGPoint vertices2[] = { ccp(79,299), ccp(134,299), ccp(134,229), ccp(79,229) };
   drawPoly(vertices2, 4, YES);
   }

   This code works fine and draws a hollow, anti-aliased rectangle on the screen.

   I also have a problem with the layering. Basically, anything I draw in this method appears behind
   all other sprite and background layers.

   Is there any way I can draw 'on top' of all layers and also use transparency?

   thanks,

   dan

   Posted 2 years ago #
4. 

   pabloruiz55
   Member

   For transparencies try looking at this:
   http://www.cocos2d-iphone.org/forum/topic/639

   for the layering... i would also like to know, i hope somebody else does

   Posted 2 years ago #
5. 

   dnsolo
   Member

   Yes, I tried that but cannot prove it works due to the layering issue!

   Anyone else got this working?

   Posted 2 years ago #
6. 

   dnsolo
   Member

   Yes, I tried that but cannot prove it works due to the layering issue!

   Anyone else got this working?

   Posted 2 years ago #
7. 

   SpaceHunter
   Member

   You could create a class derive it from CocosNode then add your primitive draw commands to the draw method. Instantiate the class and add the object to your game layer.

   Posted 2 years ago #
8. 

   PhilM
   Member

   As SpaceHunter said, you can add the draw method to a custom CocosNode/Layer class, and add it above your other contents z level. That should get it displaying above everything else.

   Posted 2 years ago #
9. 

   dnsolo
   Member

   Thanks guys, that worked.

   Posted 2 years ago #
10. 

    matsekberg
    Member

    When I try drawPoly I get a linking error saying that architecture i386 is not supported (or something like that), what is wrong?

    Posted 1 year ago #
11. 

    tudorizer
    Member

    @matsekberg are you on 1.0.0 ? If so. drawPoly is ccDrawPoly.

    Posted 11 months ago #

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