<div dir="ltr"><span style="font-family:Arial,'Helvetica Neue',Helvetica,sans-serif;font-size:15px;line-height:19.5px">An error on setting an OpenGL attribute in VTK can be due to the attribute not being used by the shader program or I believe trying to set the attribute with no data. Maybe other reasons as well. Seeing the shader code at the time the error occurs is the first step. You can uncomment vtkOpenGL2PolyDataMapper.cxx in ReplaceShaderValues to print out the shaders. </span><br></div><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Nov 18, 2015 at 6:01 AM, Lonni Besançon <span dir="ltr"><<a href="mailto:lonni.besancon@gmail.com" target="_blank">lonni.besancon@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hello,<br>
<br>
I am trying to write my own InteractorStyle for android. So far I was<br>
successful in changing what I wanted to change and creating it. Now I wanted<br>
to add a function that could handle a given rotation/translation given as a<br>
parameter. Here goes the function:<br>
<br>
<br>
/void myfunction(double* rotation, double* translation){<br>
vtkProp3D* prop3D = actor ; // Actor is a variable of the class<br>
vtkTransform* t = vtkTransform::New();<br>
t->Identity();<br>
t->RotateX(rotation[0]);<br>
t->RotateY(rotation[1]);<br>
t->RotateZ(rotation[2]);<br>
<br>
prop3D->SetUserMatrix(t->GetMatrix());<br>
<br>
vtkRenderWindowInteractor *rwi = this->Interactor;<br>
rwi->Render();<br>
}/<br>
<br>
My previous code was working just fine, but now when I call this function I<br>
get the following errors:<br>
/<br>
E/VTK ( 6271): ERROR: In<br>
/Users/....../Rendering/OpenGL2/vtkOpenGLPolyDataMapper.cxx, line 1413<br>
E/VTK ( 6271): vtkOpenGLPolyDataMapper (0x4b8e6e90): Error setting<br>
'vertexMC' in shader VAO.<br>
E/VTK ( 6271): ERROR: In<br>
/Users/....../Rendering/OpenGL2/vtkOpenGLPolyDataMapper.cxx, line 1421<br>
E/VTK ( 6271): vtkOpenGLPolyDataMapper (0x4b8e6e90): Error setting<br>
'normalMC' in shader VAO.<br>
E/VTK ( 6271): ERROR: In<br>
/Users/....../Rendering/OpenGL2/vtkOpenGLPolyDataMapper.cxx, line 1413<br>
E/VTK ( 6271): vtkOpenGLPolyDataMapper (0x4b8e6e90): Error setting<br>
'vertexMC' in shader VAO.<br>
E/VTK ( 6271): ERROR: In<br>
/Users/....../Rendering/OpenGL2/vtkOpenGLPolyDataMapper.cxx, line 1421<br>
E/VTK ( 6271): vtkOpenGLPolyDataMapper (0x4b8e6e90): Error setting<br>
'normalMC' in shader VAO.<br>
E/libEGL ( 6271): validate_display:254 error 3008 (EGL_BAD_DISPLAY)<br>
E/VTK ( 6271): ERROR: In<br>
/Users/....../Rendering/OpenGL2/vtkOpenGLPolyDataMapper.cxx, line 1413<br>
E/VTK ( 6271): vtkOpenGLPolyDataMapper (0x4b8e6e90): Error setting<br>
'vertexMC' in shader VAO.<br>
E/VTK ( 6271): ERROR: In<br>
/Users/....../Rendering/OpenGL2/vtkOpenGLPolyDataMapper.cxx, line 142<br>
/<br>
<br>
Note that the application does not crash and that my actor is rotated (by a<br>
fixed rotation even if I change the values) and that if I start a normal<br>
interaction with the actor again the application works just fine.<br>
<br>
I was therefore wondering what I am doing wrong here.<br>
<br>
I have created a post on StackOverflow for a more readable version of the<br>
code and the errors.<br>
StackOverflow Post<br>
<<a href="http://stackoverflow.com/questions/33778197/vtk-error-setting-vertexmc-in-shader-vao-and-egl-bad-display" rel="noreferrer" target="_blank">http://stackoverflow.com/questions/33778197/vtk-error-setting-vertexmc-in-shader-vao-and-egl-bad-display</a>><br>
<br>
<br>
<br>
--<br>
View this message in context: <a href="http://vtk.1045678.n5.nabble.com/Error-setting-vertexMC-in-shader-VAO-and-EGL-BAD-DISPLAY-tp5735057.html" rel="noreferrer" target="_blank">http://vtk.1045678.n5.nabble.com/Error-setting-vertexMC-in-shader-VAO-and-EGL-BAD-DISPLAY-tp5735057.html</a><br>
Sent from the VTK - Users mailing list archive at Nabble.com.<br>
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</blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature">Ken Martin PhD<div>Chairman & CFO<br>Kitware Inc.<br>28 Corporate Drive<br>Clifton Park NY 12065<br>518 371 3971<div><br></div><div><span style="font-size:10pt;font-family:Tahoma,sans-serif">This communication,
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