render in wireframe...

[epotash]

hey, ive been playing around with the gears demo a bit.  i was wondering how i can render in wireframe... i tried adding:

gl.glPolygonMode(GL.GL_LINES, GL.GL_FRONT_AND_BACK);

to the end of the GearRenderer.init() method, but it doesnt change anything.  I appreciate any comments, thanks.

[kaffiene]

find where it says
 
     gl.glBegin(GL.GL_QUAD_STRIP);

and
   
     gl.glBegin(GL.GL_QUADS);

And change them to line primitives (say, GL_LINE_STRIP and GL_LINES)

Only problem is that they won't draw quite right because the ording of the verticies are slightly different.  Still, it might work well enough.

[pepijnve]

You have the parameters for glPolygonMode in the wrong order.

1	gl.glPolygonMode( GL.GL_FRONT_AND_BACK, GL.GL_LINE );

does the trick.

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[epotash]

yep, that fixed it... thanks for your help

[GKW]

Is changing the polygon mode the fastest way to do wireframe or is drawing lines the fastest?

[kevglass]

I suspect that would depend on the card you have and how they decided to build their driver.

Kev

[kaffiene]

Is changing the polygon mode the fastest way to do wireframe or is drawing lines the fastest?

Regardless which is faster, changing the polygon mode is a better idea since the order of the vertex indexing changes with my suggestion (GL_QUAD_STRIP -> GL_LINE_STRIP etc)  So that's defintely a better way to go