[osg-users] How to properly transfer texture coordinates in geometric shaders in Shader #130 version?

[Trajce Nikolov NICK]

Hi,

have a look here MuseOpenIG/Plugin-GPUVegetation at master ·
CCSI-CSSI/MuseOpenIG · GitHub
<https://github.com/CCSI-CSSI/MuseOpenIG/tree/master/Plugin-GPUVegetation> ...
This is code for generating forests with geometry shaders. It might give
you better clue

On Sun, Dec 13, 2020 at 7:08 AM mirr... at gmail.com <mirro187 at gmail.com>
wrote:

> sorry, the screenshot is wrong. It should be  samplerU.
> I'm basically not sure how to get texture coordinates into
> Shader::FRAGMENT  in Geometric shaders.
>
>
> 在2020年12月10日星期四 UTC+8 下午11:13:21<gwal... at gmail.com> 写道：
>
>> What error are you getting?
>> I do see an undefined "samplerY" in there.
>>
>> On Wednesday, December 9, 2020 at 9:03:47 PM UTC-5 mirr... at gmail.com
>> wrote:
>>
>>> env is win10 osg3.6.4 GTX1660
>>> [image: QQ图片20201210095944.jpg]
>>>
>>> osg::ref_ptr<osg::Program> createProgram()
>>> {
>>>     osg::Program *program = new osg::Program();
>>>     program->addShader(new osg::Shader(osg::Shader::VERTEX,vertSource));
>>>     program->addShader(new
>>> osg::Shader(osg::Shader::GEOMETRY,geomSource));
>>>     program->addShader(new
>>> osg::Shader(osg::Shader::FRAGMENT,fragSource));
>>>     program->setParameter(GL_GEOMETRY_VERTICES_OUT_EXT, 3);
>>>     program->setParameter(GL_GEOMETRY_INPUT_TYPE_EXT, GL_TRIANGLES);
>>>     program->setParameter(GL_GEOMETRY_OUTPUT_TYPE_EXT,  GL_TRIANGLES  );
>>>     return program;
>>> }
>>>
>> --
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trajce nikolov nick

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