Hi,

Initialize opengl in your graft* method, and deallocate any GLU  
resources in ungraft*. In both graft* and ungraft*, make the current  
world's GL context active by calling find-gl-context ( gadget -- )  
before doing anything. This word is defined in libs/canvas; add this  
to your REQUIRES: list.

Slava

On 20-Mar-07, at 12:38 PM, bbrown wrote:

> I was bothering doublec about this on irc yesterday.  It is more a  
> general
> question, not something too specific.  If I want to add opengl  
> inits like
> changing the background color and different types of shading and I  
> only want
> it to effect the newly opened window.   Where should I put those  
> inits?  I
> thought about putting opengl-init in the 'graft' definition, but it  
> looks
> like the opengl parameters effect the main window.
>
> I could put it in draw-gadget, but draw-gadget gets update so it  
> might be
> slopppy to have some kind of sentinel-init-loaded? type of code.   
> Is there
> some other gadget method I could use to place this code?
>
> IN: mechbot
> USING: kernel gadgets opengl math arrays threads interpreter
>               prettyprint io namespaces canvas timers generic inference ;
>                               
> TUPLE: mechbot-gadget loaded? mechbot ticks ;
>
> : width 640 ; inline
> : height 480 ; inline
>
> C: mechbot-gadget ( mechbot -- gadget )
>       [ set-mechbot-gadget-mechbot ] keep     
>       [ f swap set-mechbot-gadget-loaded? ] keep
>       [ 0 swap set-mechbot-gadget-ticks ] keep
>       [ delegate>gadget ] keep ;
>       
> ! ==== Method Declarations ================================
>
> M: mechbot-gadget graft* 120 50 add-timer ;
>
> M: mechbot-gadget ungraft* dup delegate ungraft* remove-timer ;
>       
> M: mechbot-gadget tick relayout-1 ;
>
> M: mechbot-gadget pref-dim* drop width height 2array ;
>
> ! ==== Method Declarations(end) ===========================
>
> : game-tick ( gadget -- )
>       dup mechbot-gadget-ticks 1 + swap
>       set-mechbot-gadget-ticks ;      
>
> M: mechbot-gadget draw-gadget* ( gadget -- )
>       "** in draw-gadget=" print flush
>       [ game-tick ] keep
>       "** tick=" write mechbot-gadget-ticks pprint
>       nl flush        
>       !  where should the init go again?
>       glinit ;
>               
> : run ( -- )  
>       <new-mechbot> <mechbot-gadget> "mechbot" open-window ;
>
>
>
>
> : glinit ( -- )
>       "GL Init, loading opengl game properties..." print flush
>       ! Enable Smooth Shading
>       GL_SMOOTH glShadeModel
>       ! Black Background
>       0.0 0.0 0.0 0.0 glClearColor
>       ! Depth Buffer Setup
>       1.0 glClearDepth
>
>       GL_NORMALIZE glEnable
>       GL_FRONT_AND_BACK GL_FILL glPolygonMode
>       GL_SMOOTH glShadeModel
>
>       ! Enables Depth Testing
>       GL_DEPTH_TEST glEnable
>       ! The Type Of Depth Testing To Do
>       GL_LEQUAL glDepthFunc
>       ! Really Nice Perspective Calculations
>       GL_PERSPECTIVE_CORRECTION_HINT GL_NICEST glHint ;
>
>
> --
> Berlin Brown
>
>
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