[osg-users] Rendering a Depthmap

['Tom Pollok' via OpenSceneGraph Users]

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?

Am Mittwoch, 12. Juni 2019 21:18:38 UTC+2 schrieb 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
>
> On Wed, Jun 12, 2019 at 2:25 PM Glenn Waldron <gwal... at gmail.com 
> <javascript:>> wrote:
>
>> 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
>>
>>
>> On Wed, Jun 12, 2019 at 6:47 AM Lucas Amparo <lucas.... at fieb.org.br 
>> <javascript:>> wrote:
>>
>>> 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
>>>
>>>
>>>
>>>
>>>
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>>>
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>
>
> -- 
> trajce nikolov nick
>

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