Zachary Seldess

I've noticed that many of my patches using multiple viewports with jit.gl.sketch don't work as expected in Max 5. Here's a simple example below. It seems like somehow the glscale command functions differently. Open the patch in Max 4 and 5 to compare. Can anyone explain this? My use of GL commands with jit.gl.sketch has always been a bit weak - need to spend some time on it. I might be missing something...

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gl-viewports-weirdness-in-max5

Thanks Pelado, for confirming. Any ideas what's going on? I'm aware of your jit.gl.sketch proficiency. ;)

thanks for your vote on my proficiency, i wish i felt as confident!

it looks to me as though the modelling transformations are not being cleared from the modelview matrix stack when you reload the identity matrix. this would mean that the scale commands you issue have action on each other and upon subsequent drawing commands. hence the cube appears smaller.

it looks to me as though the modelling transformations are not being cleared from the modelview matrix stack when you reload the identity matrix.  this would mean that the scale commands you issue have action on each other and upon subsequent drawing commands. hence the cube appears smaller.  

On Apr 23, 2008, at 3:57 PM, pelado wrote:

> it looks to me as though the modelling transformations are not being 

> cleared from the modelview matrix stack when you reload the identity 

> matrix. this would mean that the scale commands you issue have 

> action on each other and upon subsequent drawing commands. hence the 

Precisely. Any command without arguments (e.g. glloadidentity, glend, 

etc.) are not getting executed. You can hack this for the time being 

by adding a bogus argument which will be ignored (e.g. "glend 0"), but 

it will be fixed in the next incremental (probably Friday).

On Apr 23, 2008, at 3:57 PM, pelado wrote:
>
> it looks to me as though the modelling transformations are not being  
> cleared from the modelview matrix stack when you reload the identity  
> matrix.  this would mean that the scale commands you issue have  
> action on each other and upon subsequent drawing commands. hence the  
> cube appears smaller.

Precisely. Any command without arguments (e.g. glloadidentity, glend,  
etc.) are not getting executed. You can hack this for the time being  
by adding a bogus argument which will be ignored (e.g. "glend 0"), but  
it will be fixed in the next incremental (probably Friday).

GL viewports weirdness in Max5