[vtkusers] bug in vtkVolumeTextureMapper3D

[xabi riobe]

Hi,

just to notice a bug in vtkVolumeTextureMapper3D (entered in bugTracker:
5366)

in method UpdateVolume, the VolumeSpacing attribute can take a negative
value (line 1149 in version 1.6):

this->VolumeSpacing[i] = (static_cast<double>(dim[i])-1.01)*(double)spacing[i]
/ static_cast<double>(this->VolumeDimensions[i]-1);

since dim[i] - 1.01 is negative, which causes a bad adress access in method
vtkVolumeTextureMapper3DComputeScalars (line 217 in version 1.6):

inPtr = dataPtr + components * ( z*inputDimensions[0]*inputDimensions[1] +
dy*inputDimensions[0] + x );

because z has value -1.


HTH,

Xabi R.
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