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Index › Processing Development › Libraries,  Tool Development › New Library: SuperPoint & SuperTri
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New Library: SuperPoint & SuperTri (Read 9176 times)
JohnG
New Library: SuperPoint & SuperTri
Jul 1st, 2008, 11:57pm  
I've wrapped my OpenGL Vertex Buffer points code into a library to make it easier to use.

http://www.hardcorepawn.com/SuperPoint/ contains the library, JavaDoc and a couple of examples.

If people could test this for me I'd be very grateful.

Edit I think this might require a recent version of processing which is built with java 1.5...

Edit 2nd July: Now with SuperTri powers! Speedy triangles for all your needs. Only supports coloured triangles currently, not textured.
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« Last Edit: Jul 2nd, 2008, 12:29pm by N/A »  
 
mflux
Re: New Library: SuperPoint
Reply #1 - Jul 2nd, 2008, 7:02am  
D'oh! Aaron Koblin and I were working on something similar!

Yours is pretty clean. Any way to integrate this with an obj loader type of thing? That way we can import models... Smiley
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splat
Re: New Library: SuperPoint
Reply #2 - Jul 2nd, 2008, 8:42am  
Haha... yes you did beat us to it!

Definitely a great thing for Processing. Yours is cleaner and I like it.

The only thing ours was going to have which is really useful is a VBO version which accepts not only points and colors, but also normals for TRIANGLE rendering in addition to POINTS.

I've got a little something up my sleeve that uses my library coming out in a week. If I have time I'll switch it your lib tho.

Cool stuff, love to see more! Great to have Processing harnessing some of the really powerful OpenGL tools!
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JohnG
Re: New Library: SuperPoint
Reply #3 - Jul 2nd, 2008, 11:25am  
I've added a SuperTri class to a test version, but I'm not getting the performance I'd expect. I'm going to try a slightly different way of building the data internally to see if I can speed it up.

By low performance I mean I'm "only" getting ~600,000 tri/sec out of it, where I'd expect a few million.

Edit a bit quicker now. Also it seems to be quicker drawing the same 5000 tri object 5 times, than one 25,000 tri object. Which better represents real usage I think.
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« Last Edit: Jul 2nd, 2008, 12:30pm by N/A »  
 
splat
Re: New Library: SuperPoint & SuperTri
Reply #4 - Jul 2nd, 2008, 8:21pm  
Yes.

I used the same method for the particles on the New York Talk Exchange project. I just loaded a triangulated sphere into a VBO and drew it hundreds of times. Drawing that many spheres wouldn't have been possible without help, display lists were ok, but w/ VBOs huge improvement.
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HackerLastPip
Re: New Library: SuperPoint & SuperTri
Reply #5 - Jul 7th, 2008, 9:16am  
It seems there's some kind of bug when I try drawing one triangle.  I have to call addTri three times to get a triangle to show up.

I've been over your source several times and I cant find any problems.  Am I doing something wrong?


 t.addPoint(500, 0, 0, 1, 0, 0, 1,0,0,.5);
 t.addPoint(0, 500, 0, 1, 0, 0, 1,0,0,.5);
 t.addPoint(0, 0, 500, 1, 0, 0, 1,0,0,.5);


 t.addTri( 0, 1, 2 );
 t.addTri( 0, 1, 2 ); // <-- Extra needed
 t.addTri( 0, 1, 2 ); // <-- Extra needed
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JohnG
Re: New Library: SuperPoint & SuperTri
Reply #6 - Jul 7th, 2008, 3:08pm  
Looks like I misunderstood one of the OpenGL commands I was using, and I needed to multiply a number by 3. I've updated the library, and now it will draw all triangles.
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HackerLastPip
Re: New Library: SuperPoint & SuperTri
Reply #7 - Jul 7th, 2008, 7:01pm  
It still doesn't seem to work.  Looking for the change I notice that glNormalPointer is only passed 3 values -- could that be part of the problem?

gl.glVertexPointer(3, 5126, 0, v);
gl.glColorPointer(4, 5126, 0, c);
gl.glNormalPointer(5126, 0, n);
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JohnG
Re: New Library: SuperPoint & SuperTri
Reply #8 - Jul 7th, 2008, 7:05pm  
The problem line I fixed was:
gl.glDrawArrays(GL.GL_TRIANGLES,0,numTris);
which should have been
gl.glDrawArrays(GL.GL_TRIANGLES,0,numTris*3);

glNormalPointer only takes 3 parameters, as a normal is always 3 values, whereas colour and vertex can be various number of elements per vertex.
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HackerLastPip
Re: New Library: SuperPoint & SuperTri
Reply #9 - Jul 7th, 2008, 7:15pm  
Yeah, it works great with the change.  Thanks for the library!
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HackerLastPip
Re: New Library: SuperPoint & SuperTri
Reply #10 - Jul 16th, 2008, 10:44pm  
I found the time to make an example that tests super tri:

http://users.design.ucla.edu/~ptierney/kaleidoscope/examples/super_tri/Archive.zip

Mouse looks around, arrows navigate.
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subpixel
Re: New Library: SuperPoint & SuperTri
Reply #11 - Feb 25th, 2009, 8:53pm  
"You're a John G" -- Memento

Hey there,

I was poking around elsewhere in the "Discourse" section and found a mention you made to your SuperPoint library, so came on over to check it out.

I made my own demo with some phat pointy points...

http://subpixels.com/blog/2009/02/spxlspikyball-v10.html

It also has some minimal VJ controls, so put on some music for maximum enjoyment (note: not audio reactive - you need to control it).

-spxl
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Processing: subpixels.com, OpenProcessing.org | VJ portfolio: SPXL.TV
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jeffg
Re: New Library: SuperPoint & SuperTri
Reply #12 - Mar 26th, 2009, 2:24pm  
Any plans for SuperQuad?  As well as textures. Smiley
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JohnG
Re: New Library: SuperPoint & SuperTri
Reply #13 - Mar 26th, 2009, 4:37pm  
The latest objLoader library should do all the VBO stuff for quads and textures and the like. It doesn't let you create shapes programatically, but will draw things fast I think.
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jeffg
Re: New Library: SuperPoint & SuperTri
Reply #14 - Mar 26th, 2009, 10:33am  
addTri doesn't accept 4 arguments, unless your talking about creating two triangles back to back.  What I'm trying to do is use VBO for my 3d points.  Create squares around each point, then apply a texture to it.  So SuperPoint may apply but I'm not sure how to do it.  I'm also not sure how to apply a texture to a VBO.  Normally I would use a glTexCoord4f(x, y, z, w );

This is what I'm currently using for the square.

Code:

  pgl.beginGL();
  squareList = gl.glGenLists(1);
  gl.glNewList(squareList, GL.GL_COMPILE);
  gl.glVertex2f( -1.0f, -1.0f );
  gl.glVertex2f( +1.0f, -1.0f );
  gl.glVertex2f( +1.0f, +1.0f );
  gl.glVertex2f( -1.0f, +1.0f );
  gl.glEndList();
  pgl.endGL();
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