Cycling 74 » Topic: gen extrusion problem http://cycling74.com/forums/topic/gen-extrusion-problem/feed Thu, 20 Jun 2013 00:29:26 +0000 http://bbpress.org/?v=2.2.4 http://cycling74.com/forums/topic/gen-extrusion-problem/#post-64773 <![CDATA[gen extrusion problem]]> http://cycling74.com/forums/topic/gen-extrusion-problem/#post-64773 Mon, 15 Oct 2012 08:19:32 +0000 jirko I’m trying to extrude a matrix from a gridshape with gen. The extrusion is working so far but the result are not as excepted.
The image should influence the z axis of the grid shape, but in my example this is not working correctly.. I cant recognize the image anymore. mapping issue?

Thanks for any help..

– Pasted Max Patch, click to expand. –
]]> http://cycling74.com/forums/topic/gen-extrusion-problem/#post-233586 <![CDATA[Re: gen extrusion problem]]> http://cycling74.com/forums/topic/gen-extrusion-problem/#post-233586 Mon, 15 Oct 2012 08:39:20 +0000 vichug hm, i might be completely off topic, but do you know about @matrixoutput 1 (and 2) attributes for jit.gl objects, which allow for export apparently ?

]]> http://cycling74.com/forums/topic/gen-extrusion-problem/#post-233587 <![CDATA[Re: gen extrusion problem]]> http://cycling74.com/forums/topic/gen-extrusion-problem/#post-233587 Tue, 16 Oct 2012 16:23:00 +0000 jirko yes, I know that. If you look at the patch you will see that I’m using a gridshape with matrixoutput 1.
I’m trying to extrude only a small part of the gridshape. Nobody?

]]> http://cycling74.com/forums/topic/gen-extrusion-problem/#post-233588 <![CDATA[Re: gen extrusion problem]]> http://cycling74.com/forums/topic/gen-extrusion-problem/#post-233588 Tue, 16 Oct 2012 18:26:48 +0000 endziu hi there!
i think that “you can’t recognize the image” cause you map it onto a sphere.
if you use a plane instead it pretty much works fine.
also
you don’t need lighting and shading options in your source gridshape because you’re using it with @matrixoutput 1
and you don’t need [swiz z] after [in2] inside gen because you only got one plane there.
look at this:

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`

]]> http://cycling74.com/forums/topic/gen-extrusion-problem/#post-233589 <![CDATA[Re: gen extrusion problem]]> http://cycling74.com/forums/topic/gen-extrusion-problem/#post-233589 Tue, 16 Oct 2012 18:40:45 +0000 jirko thanks a lot for the help, but I want to use a sphere not a plane. I want to reduce the video size and extrude
on a sphere. Is that possible?

]]> http://cycling74.com/forums/topic/gen-extrusion-problem/#post-233590 <![CDATA[Re: gen extrusion problem]]> http://cycling74.com/forums/topic/gen-extrusion-problem/#post-233590 Tue, 16 Oct 2012 20:57:21 +0000 Wesley Smith When you extrude a shape, you’re pulling the vertices along their surface normal. For a plane, this is the positive Z direction. For a sphere, it’s the same direction as the vertex position (i.e. for a unit sphere, the position and the normal are exactly the same). For other shapes, like a cube, the extrusion direction would change depending on which face of the cube a particular vertex was on.

Here’s a patch that extrudes a sphere and texture maps it with the video image.

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]]> http://cycling74.com/forums/topic/gen-extrusion-problem/#post-233591 <![CDATA[Re: gen extrusion problem]]> http://cycling74.com/forums/topic/gen-extrusion-problem/#post-233591 Tue, 16 Oct 2012 21:14:20 +0000 jirko wesley, you are gorgeous! thanks so much for that!!

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