[vtkusers] Error in vtkOpenGLGPUVolumeRayCastMapper.cxx, continued

[Aashish Chaudhary]

Yes please. If you can checkout the latest master, this should not happen.

Thanks,
Aashish

On Mon, Apr 4, 2016 at 11:48 AM, Richard Frank <rickfrank at me.com> wrote:

> No I'm using 7.0.0 release not a git clone.
>
> I guess I should get the latest?
>
> Rick
>
>
> On Apr 04, 2016, at 10:53 AM, Aashish Chaudhary <
> aashish.chaudhary at kitware.com> wrote:
>
> Thanks, and are you using VTK master as of last week since we had this
> problem and got fixed recently.
>
> - Aashish
>
> On Mon, Apr 4, 2016 at 10:47 AM, Richard Frank <rickfrank at me.com> wrote:
>
>> Hi,
>>
>> Here is a portion of code:
>>
>>
>> volumeProperty->SetColor(0, colorTransferFunction);
>> volumeProperty->SetColor(1, maskColorTransferFunction);
>> volumeProperty->SetScalarOpacity(opacityTransferFunction);
>> volumeProperty->SetGradientOpacity(volumeGradientOpacityFunction);
>> volumeProperty->SetInterpolationTypeToLinear();
>> volumeProperty->ShadeOn();
>> volumeProperty->SetAmbient(0.4);
>> volumeProperty->SetDiffuse(0.8);
>> volumeProperty->SetSpecular(0.2);
>> volumeProperty->SetSpecularPower(105.0);
>> volumeProperty->SetScalarOpacityUnitDistance(0.7);
>> volume->SetProperty(volumeProperty);
>>
>> The hard coded numbers are just picked empirically by viewing our most
>> common inputs.
>>
>> On Apr 03, 2016, at 10:26 PM, Aashish Chaudhary <
>> aashish.chaudhary at kitware.com> wrote:
>>
>> Rick,
>>
>> Can you send me information on what you are turning on in volume property
>> and in mapper that leads to this crash? Also, is your data is single or 2
>> or 4 component?
>>
>> Thanks,
>>
>>
>> On Sun, Apr 3, 2016 at 9:25 PM, Richard Frank <rickfrank at me.com> wrote:
>>
>>> Further investigation seems to point the GradientOpacity section of
>>> shader  raycasterfs.glsl, code which seems to be inserted at runtime: I
>>> guess gl_aspect is not defined in this scenario?
>>>
>>> Any suggestions welcome!
>>>
>>> Rick
>>>
>>> vec4 computeGradient()
>>> 145: {
>>> 146: vec3 g1;
>>> 147: vec4 g2;
>>> 148: g1.x = texture3D(in_volume, vec3(g_dataPos + g_xvec)).x;
>>> 149: g1.y = texture3D(in_volume, vec3(g_dataPos + g_yvec)).x;
>>> 150: g1.z = texture3D(in_volume, vec3(g_dataPos + g_zvec)).x;
>>> 151: g2.x = texture3D(in_volume, vec3(g_dataPos - g_xvec)).x;
>>> 152: g2.y = texture3D(in_volume, vec3(g_dataPos - g_yvec)).x;
>>> 153: g2.z = texture3D(in_volume, vec3(g_dataPos - g_zvec)).x;
>>> 154: g1 = g1*in_volume_scale.r + in_volume_bias.r;
>>> 155: g2 = g2*in_volume_scale.r + in_volume_bias.r;
>>> 156: g1.x = in_scalarsRange[0] + (
>>> 157: in_scalarsRange[1] - in_scalarsRange[0]) * g1.x;
>>> 158: g1.y = in_scalarsRange[0] + (
>>> 159: in_scalarsRange[1] - in_scalarsRange[0]) * g1.y;
>>> 160: g1.z = in_scalarsRange[0] + (
>>> 161: in_scalarsRange[1] - in_scalarsRange[0]) * g1.z;
>>> 162: g2.x = in_scalarsRange[0] + (
>>> 163: in_scalarsRange[1] - in_scalarsRange[0]) * g2.x;
>>> 164: g2.y = in_scalarsRange[0] + (
>>> 165: in_scalarsRange[1] - in_scalarsRange[0]) * g2.y;
>>> 166: g2.z = in_scalarsRange[0] + (
>>> 167: in_scalarsRange[1] - in_scalarsRange[0]) * g2.z;
>>> 168: g2.xyz = g1 - g2.xyz;
>>> 169: g2.x /= g_aspect.x;
>>> 170: g2.y /= g_aspect.y;
>>> 171: g2.z /= g_aspect.z;
>>> 172: float grad_mag = sqrt(g2.x * g2.x +
>>> 173: g2.y * g2.y +
>>> 174: g2.z * g2.z);
>>> 175: if (grad_mag > 0.0)
>>> 176: {
>>> 177: g2.x /= grad_mag;
>>> 178: g2.y /= grad_mag;
>>> 179: g2.z /= grad_mag;
>>> 180: }
>>> 181: else
>>> 182: {
>>> 183: g2.xyz = vec3(0.0, 0.0, 0.0);
>>> 184: }
>>> 185: grad_mag = grad_mag * 1.0 / (0.25 * (in_scalarsRange[1] -
>>> 186: (in_scalarsRange[0])));
>>> 187: grad_mag = clamp(grad_mag, 0.0, 1.0);
>>> 188: g2.w = grad_mag;
>>> 189: return g2;
>>> 190: }
>>>
>>>
>>>
>>>
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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>*
>
>


-- 



*| 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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