[osg-users] Rendering a Depthmap

[Lucas Amparo]

Hi, everyone

I'm trying to render a depthmap using shaders. Very simple, just using the distance from an arbitrary point P to the camera's eye. That map will be deprojected into a pointcloud.

The problem is an unexpected (by me lol) behavior from the deprojection. Using a tutorial (can't post links yet), I've done the work but the result seems weird.

For example, if I had a perfect wall on the scene, the depthmap is projected similar to a "rinnegan" (do you remember naruto? Is the best way to represent the problem kkkk)

Someone already did something similar to that? What's the best way to make a depthmap on OSG? Tutorials, examples, books are very welcomed.

Thank you!

Cheers,
Lucas

------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=76186#76186





_______________________________________________
osg-users mailing list
osg-...@lists.openscenegraph.org
http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org

[Glenn Waldron]

Lucas,

Just guessing, but it sounds like you are experiencing a problem knows as "shadow acne." There's a good explanation of it here along with some possible mitigation ideas. Very common problem when projecting a depth map back onto the main camera.

http://www.opengl-tutorial.org/intermediate-tutorials/tutorial-16-shadow-mapping/ 

 

Glenn Waldron

[Trajce Nikolov NICK]

Hi Lucas,

I have this working (Lidar scans simulation). If you post snippets I might be able to help you. You can private msg me too

Cheers

Nick

--

trajce nikolov nick

[Tom Pollok]

Is there a way to do this directly with osg or does it need a custom implementation? If no, is anybody able to share code for how to render a depthmap with intrinsic camera parameters as a 3d pointcloud using shaders?