Mattijs

When I put a texture on a videoplane, the texture resolution appears to be higher than a texture on a gridshape.

Is there a way to increase the resolution of a texture on a gridshape?

When I put a texture on a videoplane, the texture resolution appears to be higher than a texture on a gridshape. 

gridshape-texture-resolution

change the dim attribute of the gridshape object itself.

As far as I can see, the dim message changes the resolution of the gridshape itsself, not of the -texture- of the gridshape.

I have narrowed down my problem. In case of a videoplane you can either send the texture to the renderobject or to the videoplane object. A gridshape hasn't got the last option.

When I use the method of sending the texture to the render, the resolution is half of when I send the texture to the videoplane. The patch below illustrates this.

For the texture I use this jpg, it contains clear edges and high contrast:

http://www.oli.tudelft.nl/avdl1064/Eboman-Logo.png

For the texture I use this jpg, it contains clear edges and high contrast:
http://www.oli.tudelft.nl/avdl1064/Eboman-Logo.png

As of Jitter 1.5, the preferred method of texturing objects is to use 

jit.gl.texture or jit.gl.slab. This will give you many more quality 

As of Jitter 1.5, the preferred method of texturing objects is to use 
jit.gl.texture or jit.gl.slab.  This will give you many more quality 
options, and is more reliable.

I've always wondered what the real difference is between a plane shaped

gridshape and a videoplane. Only thing I can think of is that

jit.gl.videoplane is capable of texture interpolation. Maybe this is the

reason why your texture appears to have a higher resolution on a videoplane?

I've always wondered what the real difference is between a plane shaped
gridshape  and a videoplane. Only thing I can think of is that
jit.gl.videoplane is capable of texture interpolation. Maybe this is the
reason why your texture appears to have a higher resolution on a videoplane?

Hi Andrew, thanks for the tip, checking it out right now. Maybe in that case it's time for the jit.gl.gridshape help to be updated? ;)

Hee Thijs! I thought about that too. I compared the output of my patch with the image in an image viewing app. The texture-to-render method definitly down-grades the resolution of the texture. Btw in the patch I set the jit.qt.movie to the exact dimensions of the image.

To clarify, jit.gl.render uses power-of-two textures by default. This 

means that your 400x400 image is getting resampled to some power of two 

without interpolation. Using jit.gl.texture provides a more friendly 

interface for managing textures, and will use rectangular textures by 

default (as opposed to power of two), so you will not run into the 

aliasing issues. Note also that interpolation can be turned on and off 

with jit.gl.texture by using the @filter attribute.

jit.gl.render can create rectangular textures by sending the message 

You can also turn off the @rectangle attribute of jit.gl.texture if you 

need to use power-of-two textures (as some video cards have limitations 

Hi Mattijs,
To clarify, jit.gl.render uses power-of-two textures by default.  This 
means that your 400x400 image is getting resampled to some power of two 
without interpolation.  Using jit.gl.texture provides a more friendly 
interface for managing textures, and will use rectangular textures by 
default (as opposed to power of two), so you will not run into the 
aliasing issues.  Note also that interpolation can be turned on and off 
with jit.gl.texture by using the @filter attribute.

jit.gl.render can create rectangular textures by sending the message 
sequence:

texture name  ,
usetexture name,
sendtexture rectangle 1

You can also turn off the @rectangle attribute of jit.gl.texture if you 
need to use power-of-two textures (as some video cards have limitations 
with rectangular textures).

I understand, so render auto-resampled my texture to 256 x 256, videoplane didn't, which caused my confusion. Thanks again.

I believe it would be good to introduce jit.gl.texture in the various helpfiles. If you don't know what you're doing it is better to copy a setup that works by default. At least consider placing jit.gl.texture under 'see also'.

Gridshape texture resolution