<div dir="ltr">Joachim,<div><br></div><div>Thank you so much for the explanation, I tried something similar but building the shaders instead of not doing it (if I remember well). </div><div>Tomorrow i will try it and I will tell you the results!! </div>
<div><br></div><div>Carlos.<br><br><br></div></div><div class="gmail_extra"><br><br><div class="gmail_quote">2014-07-29 15:14 GMT+02:00 Joachim Pouderoux [via VTK] <span dir="ltr"><<a href="/user/SendEmail.jtp?type=node&node=5728009&i=0" target="_top" rel="nofollow" link="external">[hidden email]</a>></span>:<br>
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<div dir="ltr"><div><div><div><div><div><div>Carlos<br><br>Ok actually I was wrong. My patch works but it is not how this is supposed to happen.<br></div>Basically, VTK will merge 2 different shader source code to define each type of shader (vertex, fragment etc.).<br>
</div>A first source will come from the shader code that can be attached to the renderer shaders.<br></div>If it not exist, the default is a main function that will call propFuncVS()/propFuncFS() etc - depending the shader type.<br>
</div>The second source will come from the shader code that can be attached to the actor's property.<br></div>If it not exist, the default behaviour is to define that propFuncVS/FS functions.<br>Both source codes will be appended before being compiled by the openGlProperty.<br>
<br>So basically if you do not define a renderer shader program, you simply have to provide a shader codes to your property that defines propFuncVS/FS functions instead of usual main() functions.<br>Also do not build your shader program (program->Build()) in your code as it will fail because the main() functions are not provided. Remember they will be added later automatically before compilation by OpenGLProperty.<br>
<br></div><div>Hope it is clear and it helps!<br><br></div>Best,<br><div><br><br></div></div></div><div class="gmail_extra"><div class=""><br clear="all"><div><div dir="ltr"><b>Joachim Pouderoux</b><br><blockquote style='border-left:2px solid #CCCCCC;padding:0 1em' style="border-left:2px solid #cccccc;padding:0 1em">
<font size="1"><i>PhD, Technical Expert</i></font><br><b><font size="1"><a href="http://www.kitware.fr" rel="nofollow" link="external" target="_blank">Kitware SAS</a></font></b><br></blockquote>
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<br><br></div><div class="gmail_quote">2014-07-29 14:55 GMT+02:00 Joachim Pouderoux <span dir="ltr"><<a href="http://user/SendEmail.jtp?type=node&node=5728004&i=0" rel="nofollow" link="external" target="_blank">[hidden email]</a>></span>:<br>
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<div dir="ltr"><div>Actually it seems like there is a bug in vtkOpenGLProperty.cxx that I might have fixed. I will make a patch soon.<br></div>In the meanwhile try to change those lines:<br><pre style="font-family:Consolas;color:gainsboro;background:none repeat scroll 0% 0% rgb(30,30,30)">
<span style="color:rgb(200,200,200)">needDefaultMainVS</span> <span style="color:rgb(180,180,180)">=</span> <span style="color:rgb(180,180,180)">!</span><span style="color:rgb(200,200,200)">progHasVertex</span>
<span style="color:rgb(180,180,180)">&&</span> <span style="color:rgb(180,180,180)"></span><span style="color:rgb(200,200,200)">propProg</span><span style="color:rgb(180,180,180)">-></span><span style="color:rgb(200,200,200)">HasVertexShaders</span><span style="color:rgb(180,180,180)">();</span>
<span style="color:rgb(200,200,200)">needDefaultMainFS</span> <span style="color:rgb(180,180,180)">=</span> <span style="color:rgb(180,180,180)">!</span><span style="color:rgb(200,200,200)">progHasFragment</span>
<span style="color:rgb(180,180,180)">&&</span> <span style="color:rgb(180,180,180)"></span><span style="color:rgb(200,200,200)">propProg</span><span style="color:rgb(180,180,180)">-></span><span style="color:rgb(200,200,200)">HasFragmentShaders</span><span style="color:rgb(180,180,180)">();</span>
</pre>by<br><pre style="font-family:Consolas;color:gainsboro;background:none repeat scroll 0% 0% rgb(30,30,30)"> <span style="color:rgb(200,200,200)">needDefaultMainVS</span> <span style="color:rgb(180,180,180)">=</span> <span style="color:rgb(180,180,180)">!</span><span style="color:rgb(200,200,200)">progHasVertex</span>
<span style="color:rgb(180,180,180)">&&</span> <span style="color:rgb(180,180,180)">!</span><span style="color:rgb(200,200,200)">propProg</span><span style="color:rgb(180,180,180)">-></span><span style="color:rgb(200,200,200)">HasVertexShaders</span><span style="color:rgb(180,180,180)">();</span>
<span style="color:rgb(200,200,200)">needDefaultMainFS</span> <span style="color:rgb(180,180,180)">=</span> <span style="color:rgb(180,180,180)">!</span><span style="color:rgb(200,200,200)">progHasFragment</span>
<span style="color:rgb(180,180,180)">&&</span> <span style="color:rgb(180,180,180)">!</span><span style="color:rgb(200,200,200)">propProg</span><span style="color:rgb(180,180,180)">-></span><span style="color:rgb(200,200,200)">HasFragmentShaders</span><span style="color:rgb(180,180,180)">();</span>
</pre>With that fixed, the steps you defined should now work as no second main() will be added to both shader code.<br><div><br><div><div>Joachim<br></div></div></div></div></div><div class="gmail_extra"><div class=""><br clear="all">
<div><div dir="ltr">
<b>Joachim Pouderoux</b><br><blockquote style='border-left:2px solid #CCCCCC;padding:0 1em' style="border-left:2px solid #cccccc;padding:0 1em"><font size="1"><i>PhD, Technical Expert</i></font><br><b><font size="1"><a href="http://www.kitware.fr" rel="nofollow" link="external" target="_blank">Kitware SAS</a></font></b><br>
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<br><br></div><div class="gmail_quote">2014-07-18 11:03 GMT+02:00 carlinhos <span dir="ltr"><<a href="http://user/SendEmail.jtp?type=node&node=5728004&i=1" rel="nofollow" link="external" target="_blank">[hidden email]</a>></span>:<div>
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<div><div>
<div dir="ltr">Hello Xiaoming,<div><br></div><div>I created a new vtkOpenGLProperty and set it to the actor, anyways i tried to cast the vtkProperty obtained by the a <span style="font-family:arial,sans-serif;font-size:13px">vtkActor::GetProperty(), because vtkProperty is an abstract class. I tried so many things to make it work but i didn't manage to do it. Also i tried to use vtkOpenGLActors instead of vtkActors but it also didn't work.</span></div>
<div><span style="font-family:arial,sans-serif;font-size:13px"><br></span></div><div>Carlos.</div></div><div class="gmail_extra"><br><br><div class="gmail_quote">2014-07-18 9:46 GMT+02:00 xiaoming [via VTK] <span dir="ltr"><<a href="http://user/SendEmail.jtp?type=node&node=5727905&i=0" rel="nofollow" link="external" target="_blank">[hidden email]</a>></span>:<br>
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i'm sorry but i see that vtkActor::GetProperty() returns a pointer to the vtkProperty not vtkOpenGLProperty,which has a member of SetPropProgram,i 'm just confused with the 7th step,would you bother to tell me sth about that ,thanks in advance.
<br>Quote:
<br><div><div>< 7- Put ShadingOn to the property and SetPropProgram with the
<br>vtkShaderProgram2 build before (The vtkShaderProgram on debug has only the
<br>2 shaders I put in).>
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