[vtk-developers] GLSL Shader on a vtkActor (VTK 6.1 and Qt 5.2.1)

[Aashish Chaudhary]

I can reply in detail layer bu*t on this note, you may want to use the new
VTK rendering code for it. Marcus or Ken hopefully reply to you on that.*

- Aashish


On Tue, Jul 8, 2014 at 2:14 PM, Carlos Martinez <carlinhosmp87 at gmail.com>
wrote:

> Thanks for your answer, i thought it wasn't the right way!
>
> What do you mean when you say i have to load the shaders manually? The
> steps i'm doing are:
>
> 1- Create a vtkShaderProgram2
> 2- Create the vtkShader2 (VertexShader) and load it from the file with
> SetSourceCode.
> 3- Add my VertexShader to the vtkShaderProgram2 with
> "GetShaders()->AddItem()".
> 4- Repeat 2 and 3 with the FragmentShader.
> 5- Build the vtkShaderProgram and check the Build Status (to check if
> everything is ok).
> 6- Create a vtkActor and obtain his property(with GetProperty()).
> 7- Put ShadingOn to the property and SetPropProgram with the
> vtkShaderProgram2 build before (The vtkShaderProgram on debug has only the
> 2 shaders I put in).
>
> When the actors are going to display into the screen, the warning window
> shows up and tells me that the main is defined twice (and shows me the
> Default shaders and mine).
>
> Thanks again!!
>
>
> 2014-07-08 18:25 GMT+02:00 Aashish Chaudhary <
> aashish.chaudhary at kitware.com>:
>
> vtkOpenGLProperty::SetPropProgram is the right function but you have load your shaders manually now. I believe the error you are getting is because it is still trying to use the last shader code.
>>
>> - Aashish
>>
>>
>>
>> On Tue, Jul 8, 2014 at 3:15 AM, carlinhos <carlinhosmp87 at gmail.com>
>> wrote:
>>
>>> Hi all,
>>>
>>> I'm using Vtk 6.1.0 and Qt 5.2.1 (C++) to develop my app.
>>>
>>> I have an assembly with different actors into a vtkRenderWindow.
>>>
>>> I load a shader with the class vtkShader2, and create the program with
>>> vtkShaderProgram2, all ok with this. After that, i wanted to attach the
>>> shader to the actors (i'm going to use different shaders, depending on
>>> the
>>> actors). The problem is i didn't find examples or documentation to do
>>> this
>>> and i'm not capable to use the classes for the shaders correctly.
>>>
>>> I searched into the class vtkOpenGLProperty to set the vtkShaderProgram2
>>> with the method "SetPropProgram" and i set the property of the actors
>>> with
>>> that one, but vtk shows me a warning window with a conflict between the
>>> default shaders and mine (total 4 shaders, 2 vertex and 2 fragment).
>>>
>>> Can someone help me? Thanks in advance!!
>>>
>>>
>>>
>>> --
>>> View this message in context:
>>> http://vtk.1045678.n5.nabble.com/GLSL-Shader-on-a-vtkActor-VTK-6-1-and-Qt-5-2-1-tp5727788.html
>>> Sent from the VTK - Dev mailing list archive at Nabble.com.
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>>
>>
>> --
>>
>>
>>
>> *| Aashish Chaudhary | Technical Leader          | Kitware Inc.
>>   *
>> *| http://www.kitware.com/company/team/chaudhary.html
>> <http://www.kitware.com/company/team/chaudhary.html>*
>>
>
>


-- 



*| Aashish Chaudhary | Technical Leader         | Kitware Inc.            *
*| http://www.kitware.com/company/team/chaudhary.html
<http://www.kitware.com/company/team/chaudhary.html>*
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