[jitter] drawraw in jit.gl.lua

use jit.gl.bindtexture(texturename, textureunit)

example

tex = jit.new("jit.gl.texture", this.drawto)

jit.gl.bindtexture(tex.name, 0)
drawobject()
jit.gl.unbindtexture(tex.name, 0)


wes

On 7/14/07, Alexandre Quessy <alexandre at quessy.net> wrote:
>
> Hi all,
> Drawing multiple gridshapes without the drawraw seems pretty slow, since it resets the openGL stack everytime it draws one. (as in position, color, rotation, etc.) Regarding this, I can say that a program closer to a scene graph (such as Gem, which I am used to) is easier on the CPU/GPU bus since it doesn't reset the OpenGL stack so open, and it is also easier to position and rotate elements relatively to each other.
>
> Anyways : now I want to drawraw some shapes using Lua. Here is a piece of code. There is the "BindTexture" that doesn't work (expects an integer, id of a texture ??) and some other stuff. Anyone has suggestions on how I could improve this and make it work ? With that, I will be able to create a little Lua library for creating gridshapes and such. Thanks a lot for any input.
>
>
> test = {}
> test.videoplane = jit.new("jit.gl.videoplane", "output")
> test.videoplane.automatic=0
> test.texture_number = 1 -- how can i get the texture number ?
>
> function draw()
>   gl.Enable("BLEND")
>   gl.BlendFunc(6,1)
>   gl.Disable("DEPTH_TEST")
>   gl.Color(1,1,1,0.3)
>   gl.Scale(0.1,0.1,1)
>   gl.BindTexture("TEXTURE_2D", test.texture_number)
>
>   for i=1,100 do
>         gl.PushMatrix()
>           gl.Translate(i/150.0,0,0)
>       gl.Rotate(i,0,0,1)
>       test.videoplane:drawraw()
>     gl.PopMatrix()
>   end
> end
>
>
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