[osg-users] 32bit DEPTH for RTT

[Trajce Nikolov NICK]

Hi Glenn,

vec3 vVertex = vec3(gl_ModelViewMatrix * VertexMODEL);
worldSpaceVertex = osg_ViewMatrixInverse * vec4( vVertex, 1.0 );

Part of VP

On Thu, Oct 20, 2016 at 3:52 PM, Glenn Waldron <gwaldron at gmail.com> wrote:

> Nick, how did you calculate "worldSpaceVertex"?
>
> Glenn Waldron
>
> On Thu, Oct 20, 2016 at 9:13 AM, Trajce Nikolov NICK <
> trajce.nikolov.nick at gmail.com> wrote:
>
>> hehe .. ok :-) .. Maybe you give me a hint.
>>
>> I have F+ lighting (written by a friend of mine) and I have extended it
>> so local lights cast shadows (a bit of complex code - relatively actually,
>> but for me it is ;-) ). Works well for flat terrains with reasonable sizes.
>> I am trying to make it work with ECEF terrain (for testing I use osgearth).
>> The debug code works just fine, I am seeing the renderings from the local
>> lights are correct, so the light view matrix passed to the shader is
>> correct, but getting z-fights with setInternalFormat(GL_DEPTH_COMPONENT);
>> only. Here is my setup for the RTT (it is texturearray):
>>
>> http://pastebin.com/Nnc2iA1F
>>
>> With DEPTH32bit (really naive approach, I "was" thinking fast the
>> increase of the DEPTH precision will solve this issue, just recently
>> started with reading papers and I must admit I am not a "shadowing expert").
>>
>> Further, I am calculating the Light View Matrix and passing it to the
>> shader - this one is correct as well, since I am seeing the light in the
>> scene with the z artifacts as I mentioned .... and this is my GLSL snippet:
>>
>> http://pastebin.com/r2W0gh0L
>>
>> I am trying to get it done as simple as is ... meanwhile found this:
>>
>> http://developer.download.nvidia.com/SDK/10/direct3d/Source/
>> VarianceShadowMapping/Doc/VarianceShadowMapping.pdf
>>
>> that looks promising and apparently should help with the Z issues.
>>
>> This is my story for now, any hints are highly appreciated !!!!!
>>
>> And thanks a bunch for so far!
>>
>> Cheers,
>>
>> On Thu, Oct 20, 2016 at 2:56 PM, Voerman, L. <l.voerman at rug.nl> wrote:
>>
>>> yes?
>>> we use a variation on OpenSceneGraph\src\osgShadow\P
>>> arallelSplitShadowMap.cpp
>>> regards, Laurens.
>>>
>>> On Thu, Oct 20, 2016 at 2:35 PM, Trajce Nikolov NICK <
>>> trajce.nikolov.nick at gmail.com> wrote:
>>>
>>>> Hi Laurens,
>>>>
>>>> do you have experience with DEPTH32bit and shadowcomparation set to
>>>> true - for shadow mapping?
>>>>
>>>> On Thu, Oct 20, 2016 at 12:08 PM, Trajce Nikolov NICK <
>>>> trajce.nikolov.nick at gmail.com> wrote:
>>>>
>>>>> Hi Voerman,
>>>>>
>>>>> Yes, GL_DEPTH_COMPONENT32 was what I was missing ... Thanks a lot!
>>>>>
>>>>> Trajce
>>>>>
>>>>> On Thu, Oct 20, 2016 at 9:25 AM, Voerman, L. <l.voerman at rug.nl> wrote:
>>>>>
>>>>>> Hi Trajce,
>>>>>> maybe this sniplet helps?
>>>>>> _textureDepthBuffer = new osg::Texture2D;
>>>>>> _textureDepthBuffer->setTextureSize(_width+2.0f*_width*_guardBandPercentage,
>>>>>> _height+2.0f*_height*_guardBandPercentage);
>>>>>> _textureDepthBuffer->setSourceFormat(GL_DEPTH_COMPONENT);
>>>>>> _textureDepthBuffer->setInternalFormat(GL_DEPTH_COMPONENT32);
>>>>>> _textureDepthBuffer->setFilter(osg::Texture2D::MIN_FILTER,os
>>>>>> g::Texture2D::NEAREST);
>>>>>> _textureDepthBuffer->setFilter(osg::Texture2D::MAG_FILTER,os
>>>>>> g::Texture2D::NEAREST);
>>>>>> _textureDepthBuffer->setShadowComparison(false);
>>>>>> _textureDepthBuffer->setWrap(osg::Texture::WRAP_R,osg::Textu
>>>>>> re::CLAMP_TO_EDGE);
>>>>>> _textureDepthBuffer->setWrap(osg::Texture::WRAP_S,osg::Textu
>>>>>> re::CLAMP_TO_EDGE);
>>>>>>
>>>>>> // camera
>>>>>> _colorDepthCamera = new osg::Camera;
>>>>>> _colorDepthCamera->setStats(new osg::Stats("Camera"));
>>>>>> _colorDepthCamera->setName("colorDepth");
>>>>>> _colorDepthCamera->setClearMask(GL_COLOR_BUFFER_BIT |
>>>>>> GL_DEPTH_BUFFER_BIT);
>>>>>> _colorDepthCamera->setReferenceFrame(osg::Transform::RELATIVE_RF);
>>>>>> // set viewport
>>>>>> _colorDepthCamera->setViewport(0,0,_width+2.0f*_width*_guard
>>>>>> BandPercentage,_height+2.0f*_height*_guardBandPercentage);
>>>>>> _colorDepthCamera->setRenderOrder(osg::Camera::PRE_RENDER,0);
>>>>>> _colorDepthCamera->setRenderTargetImplementation(osg::Camera
>>>>>> ::FRAME_BUFFER_OBJECT);
>>>>>> _colorDepthCamera->attach(osg::Camera::DEPTH_BUFFER,
>>>>>> _textureDepthBuffer.get(),0,0,false,0,0); // depth
>>>>>> _colorDepthCamera->attach(osg::Camera::COLOR_BUFFER,
>>>>>> _textureColorBuffer.get(),0,0,false,_msaa,_msaa); // color
>>>>>> regards, Laurens.
>>>>>>
>>>>>> On Wed, Oct 19, 2016 at 11:15 PM, Trajce Nikolov NICK <
>>>>>> trajce.nikolov.nick at gmail.com> wrote:
>>>>>>
>>>>>>> Hi Community,
>>>>>>>
>>>>>>> anyone with clue how to set RTT osg::Texture with 32bit DEPTH?
>>>>>>>
>>>>>>> Thanks a bunch as always!
>>>>>>> Cheers,
>>>>>>> Nick
>>>>>>>
>>>>>>> --
>>>>>>> trajce nikolov nick
>>>>>>>
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>>>>>>>
>>>>>>>
>>>>>>
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>>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> trajce nikolov nick
>>>>>
>>>>
>>>>
>>>>
>>>> --
>>>> trajce nikolov nick
>>>>
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>> --
>> trajce nikolov nick
>>
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trajce nikolov nick
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