[vtkusers] Error in vtkOpenGLGPUVolumeRayCastMapper.cxx, continued

[Aashish Chaudhary]

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>*
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