Comments on: Cartesian Creatures http://www.sanchtv.com/?p=49 generative | interactive | visual Tue, 10 Aug 2010 20:15:11 +0000 hourly 1 http://wordpress.org/?v=3.0.1 By: Faggot25 http://www.sanchtv.com/?p=49&cpage=1#comment-79324 Faggot25 Tue, 13 Oct 2009 06:07:35 +0000 http://www.sanchtv.com/?p=49#comment-79324 Think blues, country, funk, jazz, reggae, rock here. , Think blues, country, funk, jazz, reggae, rock here. ,

]]> By: thyo http://www.sanchtv.com/?p=49&cpage=1#comment-13646 thyo Thu, 29 May 2008 22:12:05 +0000 http://www.sanchtv.com/?p=49#comment-13646 starts with a black screen for me :-( got a nvidia card and a working isight, but somehow it doesnt detect any marker ids can somebody help a noob out plz? greetings thyo starts with a black screen for me :-(
got a nvidia card and a working isight,
but somehow it doesnt detect any marker ids
can somebody help a noob out plz?
greetings thyo

]]> By: alx http://www.sanchtv.com/?p=49&cpage=1#comment-11080 alx Wed, 02 Apr 2008 14:57:16 +0000 http://www.sanchtv.com/?p=49#comment-11080 Just wondering, Sanch; did you ever manage to generate reliable normals for lighting this one? I've been working on something similar. I've managed to create a tangent-space normal map from the heightmap/displacement image, as Angelo Pesce suggests above, but I'm not sure how to use this for lighting the distorted mesh. Any tips? alx http://machinesdontcare.wordpress.com Just wondering, Sanch; did you ever manage to generate reliable normals for lighting this one?

I’ve been working on something similar. I’ve managed to create a tangent-space normal map from the heightmap/displacement image, as Angelo Pesce suggests above, but I’m not sure how to use this for lighting the distorted mesh.

Any tips?

alx
http://machinesdontcare.wordpress.com

]]> By: Rob McDougall http://www.sanchtv.com/?p=49&cpage=1#comment-11009 Rob McDougall Mon, 31 Mar 2008 00:29:37 +0000 http://www.sanchtv.com/?p=49#comment-11009 Holy moly, I really like those objects. Love the way you've got multiple colours going on! Holy moly, I really like those objects. Love the way you’ve got multiple colours going on!

]]> By: alx http://www.sanchtv.com/?p=49&cpage=1#comment-10931 alx Fri, 28 Mar 2008 13:08:22 +0000 http://www.sanchtv.com/?p=49#comment-10931 Please note: the code in the post above is specific to Apple's Quartz Composer software and is written in a language that is a subset of GLSL, so may not be of interest to HLSL shader coders. Or it may... ;) alx Please note:

the code in the post above is specific to Apple’s Quartz Composer software and is written in a language that is a subset of GLSL, so may not be of interest to HLSL shader coders.

Or it may… ;)

alx

]]> By: Normal Map « machines don’t care http://www.sanchtv.com/?p=49&cpage=1#comment-10929 Normal Map « machines don’t care Fri, 28 Mar 2008 12:59:21 +0000 http://www.sanchtv.com/?p=49#comment-10929 [...] post info By toneburst Categories: GLSL and Quartz Composer Tags: GLSL, Heightmap, Normal Maps, Quartz Composer 3.0, Vertex Displacement Mapping Inspired by Angelo Pesce’s comment here, I decided this morning I’d have a go at generating a Normal Map from a live video input, using a CIFilter patch. The code is surprisingly simple. [...] [...] post info By toneburst Categories: GLSL and Quartz Composer Tags: GLSL, Heightmap, Normal Maps, Quartz Composer 3.0, Vertex Displacement Mapping Inspired by Angelo Pesce’s comment here, I decided this morning I’d have a go at generating a Normal Map from a live video input, using a CIFilter patch. The code is surprisingly simple. [...]

]]> By: alx http://www.sanchtv.com/?p=49&cpage=1#comment-10883 alx Wed, 26 Mar 2008 15:28:09 +0000 http://www.sanchtv.com/?p=49#comment-10883 Hi, this is really impressive stuff. I've been trying to do something similar in GLSL, using a program called Quartz Composer on the Mac. I've got somewhere near (see screenshots at http:machinesdontcare.wordpress.com ), but I'm having a few problems with the mesh ending up with big holes in it. I've also found it impossible to create symmetrical distortions, even though I've mirrored the displacement map textureso that the edges are identical. Do you mind if I ask what equation you're using to turn the mesh into a sphere? I think my problem is that the mesh is being distorted into a sphere in the wrong way... Sorry to bug you, alx Hi,

this is really impressive stuff.
I’ve been trying to do something similar in GLSL, using a program called Quartz Composer on the Mac. I’ve got somewhere near
(see screenshots at http:machinesdontcare.wordpress.com ),
but I’m having a few problems with the mesh ending up with big holes in it. I’ve also found it impossible to create symmetrical distortions, even though I’ve mirrored the displacement map textureso that the edges are identical.

Do you mind if I ask what equation you’re using to turn the mesh into a sphere? I think my problem is that the mesh is being distorted into a sphere in the wrong way…

Sorry to bug you,

alx

]]> By: /blog » Blog Archive » Sanch Rocks http://www.sanchtv.com/?p=49&cpage=1#comment-7441 /blog » Blog Archive » Sanch Rocks Thu, 20 Dec 2007 21:50:42 +0000 http://www.sanchtv.com/?p=49#comment-7441 [...] I saw a few of these images a while back on fffffound and couldn’t get enough. They’re by an artist called Sanch (David Dessens) in a study he calls, Cartesian Creatures. So rad. Reading more about this guy now - cross-linked from Generator.X. Evidently he uses a software called vvvv, a by meso.net. Looking into that now… [...] [...] I saw a few of these images a while back on fffffound and couldn’t get enough. They’re by an artist called Sanch (David Dessens) in a study he calls, Cartesian Creatures. So rad. Reading more about this guy now – cross-linked from Generator.X. Evidently he uses a software called vvvv, a by meso.net. Looking into that now… [...]

]]> By: mintfresh http://www.sanchtv.com/?p=49&cpage=1#comment-3937 mintfresh Tue, 18 Sep 2007 14:41:50 +0000 http://www.sanchtv.com/?p=49#comment-3937 omg this is amazing, visual appeal with mathematics?! i thought it was out there somewhere and here it is wow.. what and how do you do this?? i am really, reaaaallly interested! thanks omg this is amazing, visual appeal with mathematics?!

i thought it was out there somewhere and here it is wow..

what and how do you do this?? i am really, reaaaallly interested!

thanks

]]> By: sanch http://www.sanchtv.com/?p=49&cpage=1#comment-1848 sanch Thu, 05 Jul 2007 14:07:17 +0000 http://www.sanchtv.com/?p=49#comment-1848 hey thanks Angelo , the normal maps work quite good but the problem is that the map doesn´t fit with the mesh... It works for simple mesh , but as sonn as the mesh is getting more complex , the normal are getting unprecise and doesn´t fit with the mesh anymore ... i don´t really understand why hey thanks Angelo , the normal maps work quite good but the problem is that the map doesn´t fit with the mesh…
It works for simple mesh , but as sonn as the mesh is getting more complex , the normal are getting unprecise and doesn´t fit with the mesh anymore … i don´t really understand why

]]> By: Angelo Pesce http://www.sanchtv.com/?p=49&cpage=1#comment-1803 Angelo Pesce Thu, 28 Jun 2007 09:47:20 +0000 http://www.sanchtv.com/?p=49#comment-1803 Computing the normal should be quite easy. You have a texture map that is an heightfield. You can compute the derivative of this heightfield: dx@pixel(x,y)=pixel(x,y)-pixel(x+1,y) and the same for dy. Now you got a normal for each pixel of the texturemap (the z coord of the normal is easy z^2=x^2+y^2), and you can use it as a displacement of the normal at the sphere vertex (beware of the space you're working on). And if you precompute the map normals then what you have is simply a normalmap, and this is not surprising after all ;) Computing the normal should be quite easy. You have a texture map that is an heightfield. You can compute the derivative of this heightfield: dx@pixel(x,y)=pixel(x,y)-pixel(x+1,y) and the same for dy. Now you got a normal for each pixel of the texturemap (the z coord of the normal is easy z^2=x^2+y^2), and you can use it as a displacement of the normal at the sphere vertex (beware of the space you’re working on). And if you precompute the map normals then what you have is simply a normalmap, and this is not surprising after all ;)

]]> By: sanch http://www.sanchtv.com/?p=49&cpage=1#comment-1224 sanch Fri, 04 May 2007 17:54:40 +0000 http://www.sanchtv.com/?p=49#comment-1224 thanks guys @ u7angel http://vvvv.org/tiki-view_forum_thread.php?forumId=10&comments_parentId=13668 thanks guys
@ u7angel http://vvvv.org/tiki-view_forum_thread.php?forumId=10&comments_parentId=13668

]]> By: lenny http://www.sanchtv.com/?p=49&cpage=1#comment-1218 lenny Fri, 04 May 2007 09:07:13 +0000 http://www.sanchtv.com/?p=49#comment-1218 wow, wonderful wow, wonderful

]]> By: u7angel http://www.sanchtv.com/?p=49&cpage=1#comment-1207 u7angel Wed, 02 May 2007 16:41:16 +0000 http://www.sanchtv.com/?p=49#comment-1207 oh man, i wish i had a nvidia card to see this live in action. any way to make it work for ati cards too ? what's the reason that ati cards don't like this kind of stuff ? oh man, i wish i had a nvidia card to see this live in action. any way to make it work for ati cards too ? what’s the reason that ati cards don’t like this kind of stuff ?

]]> By: sanch http://www.sanchtv.com/?p=49&cpage=1#comment-1202 sanch Tue, 01 May 2007 17:10:03 +0000 http://www.sanchtv.com/?p=49#comment-1202 If you speak about the zip file with the shader it work for me !? If you speak about the zip file with the shader it work for me !?

]]> By: pensone http://www.sanchtv.com/?p=49&cpage=1#comment-1201 pensone Tue, 01 May 2007 16:32:07 +0000 http://www.sanchtv.com/?p=49#comment-1201 excuse me..... is it a broken link??? your stuff is great!! excuse me….. is it a broken link???

your stuff is great!!

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