[jitter] lua questions

thanks wes, lua is so flexible

i'm still having difficulties with the placement of
  gl.Enable("BLEND")
  gl.BlendFunc(1,6)
  gl.ClearColor(0,0,0,0.5)
my intuition tells me it should be in the init function, but no go.

On Jan 2, 2008 5:26 AM, Wesley Smith <wesley.hoke at gmail.com> wrote:

> Sorry, there was a slight typo in my script in the last post.  Here's
> a fixed version:
>
>
> autowatch = 1
> print("compiled")
> render_context = this.drawto
> angle=0
> mouseXY={0,0}
> dir=1
>
>
>
> function BuildLists()
>
>    box = gl.GenLists(2)
>    gl.NewList(box    ,"COMPILE");
>        gl.Begin("QUADS")
>            gl.Vertex (-0.5 , 0.5 , 0. )                -- Top Left
>            gl.Vertex ( 0.5 , 0.5 , 0. )                -- Top Right
>            gl.Vertex ( 0.5 ,-0.5 , 0. )            -- Bottom Right
>            gl.Vertex (-0.5 ,-0.5 , 0. )
>        gl.End();
>    gl.EndList()
> end
> function init()
> --initialize the dispaly list
>        if(this.context ~= 0) then
>            BuildLists()
>        end
> end
>
>
> -- functions as variables!
> function setOnReloadOrDestChanged(func)
>        script_load = func
>        dest_changed = func
> end
> setOnReloadOrDestChanged(init)
>
> --[[
> This section is equivalent to the above
>
> function script_load()
>        init()
> end
>
> function dest_changed()
>        init()
> end
> --]]
>
> function draw()
>    gl.Clear("COLOR_BUFFER_BIT" , "DEPTH_BUFFER_BIT")
>    --gl.LoadIdentity()
>    --gl.Enable("BLEND")
>    --gl.BlendFunc(1,6)
>    --gl.ClearColor(1,1,0,1)
>    rot()
>    for i=0,1000 do
>    gl.Translate(mouseXY[1],mouseXY[2],(i/1000)-1);
>    gl.Rotate (angle,0,0,1)
>    gl.Color(i/1000, math.random(), 1, i/1000)
>    gl.CallList(box)
>    end
>
> end
>
> function rot()
>    angle = angle+dir
>    if angle==15 then dir= -0.5
>    elseif angle==0 then dir= 0.5
>    end
> end
>
> --create the listener callback function
> function callback(event)
>    if(event.eventname == "mouseidle") then
>        local _glXmouse = event.args[1]
>        local _glYmouse = event.args[2]
>        --need to transform mouse ccordinates to world domain
>        --dono why, but 0.95 needed
>        mouseXY=jit.gl.screentoworld({_glXmouse,_glYmouse, 0.95})
>    end
> end
>
> --create a listener object
> listener = jit.listener(render_context, "callback")
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>
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