I'm trying the Javier's "CappingEffect" example and it seems to work fine...but
only when I look at the scene from one side...if I move the camera to the
opposite side I still see the cappings that are drawn over my geometry (they
should be hidden instead)...please refer to the attachments to se
ClipNode is positional state (like lights). It just needs to be somewhere in
your scene graph, and it it in effect at *any* part of your scene graph that
enables GL_CLIP_PLANEn. So the placement of ClipNode relative to the cow is
irrelevant.
Don't know about Javier's "CappingEffect"; I'd just
Hi
just an example of what can be done with ogs in this respect
http://forum.openscenegraph.org/viewtopic.php?t=8512 ( also some hints )
Regards
Sergey
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Javier,
Thanks so much for the link. I haven't seen this thread before.
I'm looking at your code and I'm not exactly sure how the CappingEffect
node fits into the scene graph.
Say I want to cut the cow in half and cap it. I am going to need a
ClipNode / ClipPlane and the CappingEffect node, corr
Hi Cory,
Sorry I came a bit late to this thread, but just in case you sill
find it useful, I sent some code to the list about a year ago, that
implements the stencil technique described in the red book. It is in
this message:
http://lists.openscenegraph.org/pipermail/osg-users-openscenegraph.
On 7/20/2011 3:16 PM, Chris 'Xenon' Hanson wrote:
I think everyone should own the Red Book, period (and Orange book while
you're at it).
But I think Distilled and SuperBible are much better for learning.
Can I hire you as my PR man? :-)
--
-Paul Martz Skew Matrix Software
On 7/20/2011 2:42 PM, Cory Riddell wrote:
I'm curious, why didn't you suggest your own book?
_OpenGL Distilled_ was intended for people that already knew 3D graphics
concepts and just wanted an introduction to the OpenGL API. I assumed the reader
already knew what a stencil buffer was, for ex
On 7/20/2011 2:42 PM, Cory Riddell wrote:
> I'm curious, why didn't you suggest your own book?
Modesty?
I'll recommend Paul's book for LEARNING.
The Red Book is fine, for reference. But having a Toyota Service manual
doesn't help you
understand how to drive a Camry.
> Because it isn't fo
On 7/20/2011 3:34 PM, Paul Martz wrote:
> :-) There are a lot of people that try to write OSG code without
> knowing what's going on under the hood. I strongly recommend the
> OpenGL red book:
>
> http://www.amazon.com/OpenGL-Programming-Guide-Official-Learning/dp/0321552628/ref=sr_1_1?s=books&ie=U
On 7/20/2011 12:27 PM, Cory Riddell wrote:
Paul, thanks for the opinion. I think I'm getting close to the limits of
what I can do with OSG without knowing a thing about OpenGL (and I'm
pretty stoked about how much I was able to accomplish without really
knowing what I'm doing).
Time to buckle do
Hi Robert,
The osgreflect example is the one I was using as a guide along with the
article I linked to in my first post. I didn't get it working, but I
have an inkling of how it should work. I really need to step back though
and learn some fundamentals first.
Cory
On 7/20/2011 3:14 PM, Robert O
Hi Cory,
Have a look at the osgreflect example to see how you can set up
stencil buffer usage in the OSG.
Robert.
On Wed, Jul 20, 2011 at 7:27 PM, Cory Riddell wrote:
> Paul, thanks for the opinion. I think I'm getting close to the limits of
> what I can do with OSG without knowing a thing abou
Paul, thanks for the opinion. I think I'm getting close to the limits of
what I can do with OSG without knowing a thing about OpenGL (and I'm
pretty stoked about how much I was able to accomplish without really
knowing what I'm doing).
Time to buckle down and learn some (modern) OpenGL. I'm going
Using stencil for capping is an old trick and works well. I don't know of any
example code for it, and it's been years, more than a decade, since I've done it
myself. Your only other option would be some type of CSG approach, which would
be computationally expensive, especially if the clip plane
I've been thinking about using a ClipNode to cut my model in two to
expose the inside details like a cutaway drawing. Just sticking a
ClipNode at the root of my model graph does remove half of it, but the
model ends up looking hollow rather than solid. I want to cap the open
side. For example, if a
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