View Issue Details [ Jump to Notes ] | [ Print ] | ||||||||
ID | Project | Category | View Status | Date Submitted | Last Update | ||||
0001432 | VTK | (No Category) | public | 2004-12-15 11:22 | 2016-08-12 09:54 | ||||
Reporter | Katharina.Quintus | ||||||||
Assigned To | Kitware Robot | ||||||||
Priority | low | Severity | minor | Reproducibility | always | ||||
Status | closed | Resolution | moved | ||||||
Platform | OS | OS Version | |||||||
Product Version | |||||||||
Target Version | Fixed in Version | ||||||||
Summary | 0001432: documentation of method SetParallelScale of vtkCamera not correct? | ||||||||
Description | The documentation of the method SetParallelScale/ GetParallelScale in vtkCamera tells "Set/Get the scaling used for a parallel projection, i.e. the height of the viewport in world-coordinate distances." I tried several times and I think it should say "... the half of the height of the viewport." | ||||||||
Tags | No tags attached. | ||||||||
Project | |||||||||
Type | |||||||||
Attached Files | |||||||||
Relationships | |
Relationships |
Notes | |
(0016856) Paul Melis (reporter) 2009-07-14 04:25 |
I ran into this as well. The relevant code in vtkCamera::ComputePerspectiveTransform is if (this->ParallelProjection) { // set up a rectangular parallelipiped double width = this->ParallelScale*aspect; double height = this->ParallelScale; double xmin = (this->WindowCenter[0]-1.0)*width; double xmax = (this->WindowCenter[0]+1.0)*width; double ymin = (this->WindowCenter[1]-1.0)*height; double ymax = (this->WindowCenter[1]+1.0)*height; this->PerspectiveTransform->Ortho(xmin,xmax,ymin,ymax, this->ClippingRange[0], this->ClippingRange[1]); Note that this leads to an orthographic view with height ymax - ymin = (WC[1]+1)*PS - (WC[1]-1)*PS = PS*WC[1] + PS - PS*WC[1] + PS = 2 * ParallelScale So even though the parallel scale value is indeed taken as viewport height the computed orthographic projection results in a view twice as high. |
(0021501) jjinnsoft (reporter) 2010-07-27 15:56 |
I also ran into this. I'm trying to capture 2D images with a specific dots per inch (the 3D model is in real-world millimeters). It seemed like my calculations to pass into this parameter were wrong by a factor of 2 and this explains why. |
(0036758) Kitware Robot (administrator) 2016-08-12 09:54 |
Resolving issue as `moved`. This issue tracker is no longer used. Further discussion of this issue may take place in the current VTK Issues page linked in the banner at the top of this page. |
Notes |
Issue History | |||
Date Modified | Username | Field | Change |
2008-11-30 09:20 | Mathieu Malaterre | Assigned To | Mathieu Malaterre => François Bertel |
2008-11-30 20:17 | François Bertel | Assigned To | François Bertel => |
2009-07-14 04:25 | Paul Melis | Note Added: 0016856 | |
2010-07-27 15:56 | jjinnsoft | Note Added: 0021501 | |
2011-06-16 13:11 | Zack Galbreath | Category | => (No Category) |
2016-08-12 09:54 | Kitware Robot | Note Added: 0036758 | |
2016-08-12 09:54 | Kitware Robot | Status | expired => closed |
2016-08-12 09:54 | Kitware Robot | Resolution | open => moved |
2016-08-12 09:54 | Kitware Robot | Assigned To | => Kitware Robot |
Issue History |
Copyright © 2000 - 2018 MantisBT Team |