_1024_Perspective QCplugin
It is about time to release our Perspective correct QCplugin, known as Homography.
It will allow you QClovers to corner pin a quad in a perspective-correct manner.
Useful for video mapping projects. I’ve been abusing it in the past year.
The plug is just transforming the openGL matrix, so it should be rather light on your GPU.
Download from the box on the right side of this site. Enjoy.
1024 Architecture Blog / MadMapper, Video Mapping, Quartz Composer plugins, whatever ... 
November 9, 2010 at 15:14
Couldn’t you get the same effect by just using a standard Sprite patch, and rotating it on the X-axis?
a|x
November 9, 2010 at 15:57
you could, but it would be lots of tinkering. Here you “pin” the corners of the quad, which is faster.
November 9, 2010 at 22:29
do you know memo and his ‘4 point quad warper’?
http://www.memo.tv/projection_mapping_quad_warping_with_quartz_composer_vdmx
which one is faster?
November 9, 2010 at 23:28
memo’s is on the GPU (it is a shader). Mine on the CPU but the calculation is “rather” fast.
So Memo’s should be a bit faster.
However, AFAIK, memo’s is not perspective-correct, whereas mine is.
It depends on your usage. If you don’t map very precise objects or building with important perspective effect, you won’t see the difference, so memo’s will be better.
You should try both and make your opinion.
November 10, 2010 at 01:09
thanks, thats clearifying!!
November 10, 2010 at 18:47
first of all you are doing really outstanding stuff.. thanks for this.. you got my deepest respect..
but one question.. am i right that this plugin doesn’t work in an iterator?
greetz from munich..
pls
November 10, 2010 at 20:41
It should work but the incoming image has to come from a structure of images. Thanks for noting this, I’ll change that in the next version so that the plug works out of the box.
November 10, 2010 at 22:24
ok.. you are right.. it works now.. even with ordinary single images.. but i’ll try the suggested structure concept.. i have to admit that i had a system restart in between..
anyway.. thanks for your quick reply..
November 15, 2010 at 11:42
i tried to feed an image structure in but didn’t get the expected results.. maybe i’m on the wrong way but it seems that just the first image is loaded.. and also just after restarting the composition.. maybe you could post a quick example?
anyway.. the plugin without iterator works just fine.. never before noticed the huge difference to memo’s quad shader..
greetz
pls
November 20, 2010 at 00:50
Let me echo that I find your work really interesting…
I’ve run into some strange behavior with the _1024_perspective patch and I’m hoping that you can explain to me what is happening. I’ve added a patch in QC that allows me to control the corners using the mouse. In order to help debug some weird behavior I display circles at the corner coordinates that are input to _1024_perspective. After doing this I notice that the corner coordinates that I input to the patch initally match, but after some changes to the quad they no longer match the corner positions of the homography mapped image plane. Is there something that is being done in _1024_perspective that I am missing? Thanks in advance.
November 20, 2010 at 02:12
You must be missing something I guess… Please re-download version 1.01 from the box, it contains a new sample file with circular-handles that you can drag, to verify that is is working correctly. (You’ll need 10.6 for the example btw, it uses the Interaction patch)
November 20, 2010 at 02:37
Thanks… I redownloaded and now there is much more going on in the .qtz file and the dragging works.
November 22, 2010 at 19:33
LOVE IT!!!! LOVE IT!!!!!! LOVE IT!!!!
Any chance of more blend modes???? pretty please??
thanks!
jd
November 22, 2010 at 21:06
Which ones ?
November 22, 2010 at 23:19
oooooops mispoke, was thinking a Mask image input would be verra cool.
have been jumping back and forth into After FX all day,
“Body like stone, mind like meatloaf.”
thanks
jd
November 22, 2010 at 23:25
just to clarify, the mask image would also be “Perspectified” using the same coordinates…
May 5, 2011 at 23:59
Just great, can’t say how much I appreciate this patch.
With this patch and in combination with the polygon mask I have been able to map some great shapes.
I was curious to hear if there was a way to add more handles (i.e. starting with a pentagon or hexagon?). I am not sure if there would be a simple way, or if your work is fairly proprietary.
Keep up the good work!
June 14, 2011 at 00:08
Sorry for my stupidity, but where is the download box?¿?¿?¿?¿?¿?
June 14, 2011 at 07:25
i´ve found it! thanks!
June 14, 2011 at 20:18
Hi guys,
I need some help here.
I use the _1024_Perspective.qtz because it’s easyer with the mouse to set everything. But every time I sace it it and reopen it evertything is gone? Isn’t there a save option or something like that?
I know that the plugin saves. but not in _1024_Perspective.qtz
any help?
Thanks.
Lucas
June 15, 2011 at 09:17
you have to make your own saver with QC.
June 15, 2011 at 11:49
How do you do this?
August 31, 2011 at 20:06
Hi! I have a really stupid question. I´ve installed Quartz Composer, i run the patch and do the needed distortion, but when i loaded it in q-lab as render engine it dont plays my video cue, instead i see the keystone grid whithout distortion nor posibbility to disort it!
Thanks for any help!!!!
September 2, 2011 at 08:24
sorry I don’t know Q-Lab.
Did you try the Q-Lab forum ?
September 9, 2011 at 17:35
is there a 10.5 version, for QC 3.x?
November 29, 2011 at 23:53
Will there be a version that has anti-aliased edges at any point?
Keep it up!
August 18, 2012 at 15:14
Hi! I used 1024_perspective for a long time in a Mac book pro with Snow leopard installed, and it was a very good time! Now i´ve changed to a graet mac book pro but with OSX Lion, and i can not find the handels!! and if i try it manully in the parameters i appears “NA”?!?!? Any idea what is happening!? Thanks
Eugenio
August 27, 2012 at 16:56
the AAPL built-in interaction patch is bugged under Lion.
The perspective patch is still working correctly tho’
July 13, 2013 at 07:03
I’m starting a new online blog directory and was wondering if I can submit your website? I’m trying to mature my directory slowly by hand so that it retains quality.
I will make sure and put your blog in the appropriate category and I’ll additionally use, “_1024_Perspective QCplugin | 1024 Architecture Blog / MadMapper, Video Mapping, Quartz Composer plugins, whatever …” as your anchor text. Make sure you let me know if this is ok with you by mailing me at: emorypearl@gmail.com. Thanks alot :)
July 30, 2013 at 20:08
no problem
March 24, 2014 at 14:07
sorry but I could not find the box?
April 7, 2014 at 12:13
click on the QC plugins repository