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jit.gl.videoplane tex_offset_x problem?

February 22, 2006 | 3:41 pm

Hello

I would no pretend it is a bug report, because I am way to insecure
in openGl to do so, but:

if you open jit.gl.videoplane help file, and you play with the
tex_offset_x, tex_scale_x, tex_offset_y, tex_scale_y, and even nudge,
you do not see any effect until you play with the dim…

Is it normal?

pa

btw, would there be a better way than this to use just a part of a
texture T1 on an object, and an other zone of the same texture T1 on
an other object?


February 22, 2006 | 7:59 pm

On Feb 22, 2006, at 7:41 AM, Pierre Alexandre Tremblay wrote:

> if you open jit.gl.videoplane help file, and you play with the
> tex_offset_x, tex_scale_x, tex_offset_y, tex_scale_y, and even
> nudge, you do not see any effect until you play with the dim…
>
> Is it normal?

This is a known issue we hope to resolve soon, but yes for the
meantime, this is the appropriate workaround.

> btw, would there be a better way than this to use just a part of a
> texture T1 on an object, and an other zone of the same texture T1
> on an other object?

You could just use low level OpenGL calls with jit.gl.sketch if you
prefer.


February 22, 2006 | 8:13 pm

Thank you for the quick answer.

>> btw, would there be a better way than this to use just a part of a
>> texture T1 on an object, and an other zone of the same texture T1
>> on an other object?
>
> You could just use low level OpenGL calls with jit.gl.sketch if you
> prefer.

Thank you, I will look into this.

Am I right to think that it is more efficient to read a movie once,
and then to do the reframing by different scope on the same texture,
instead of the movie going into jit.scisors, then sent to several
jit.gl.texture?

pa


February 22, 2006 | 8:47 pm

On Feb 22, 2006, at 12:13 PM, Pierre Alexandre Tremblay wrote:

> Am I right to think that it is more efficient to read a movie once,
> and then to do the reframing by different scope on the same
> texture, instead of the movie going into jit.scisors, then sent to
> several jit.gl.texture?

Yes. Though it might not be much worse as long as you’re not sending
more video data total, if you’re using *lots* of small textures, the
performance difference might be noticeable.

-Joshua


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