Re: [osg-users] Transforming nodes
Dear Brendan, That was absolutely the problem!! Thanks so much for your help. Sincerely, Oren p.s. I wish there was some kind of heads-up in the header file for DOFTransform!! -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=21786#21786 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Transforming nodes
Hi, but for some reason the default scale for an osgSim::DOFTransform is (0,0,0) To me that seems a rather bad default to have for scaling on a DOF, I would have assumed the default would be 1,1,1 not 0,0,0 Is there a reason why its 0,0,0, and not 1,1,1 and should we change it BTW the default for MPI FLT DOF node is 1,1,1 Thank you! Cheers, GordonTomlinson -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=21788#21788 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Transforming nodes
Hi Gordon,
To me that seems a rather bad default to have for scaling on a DOF, I would
have assumed the default would be 1,1,1 not 0,0,0
That's bitten me a few times too. Specifically when I create DOFs
programmatically instead of reading an FLT file.
Is there a reason why its 0,0,0, and not 1,1,1 and should we change it
I think we could change it. Just need to beat the inertia of making such
a simple change and sending the whole modified file...
U...
Ok! Did it!
Uh, there are lots more uninitialized variables there... What should
_minScale, _maxScale, _minHPR, _maxHPR, _minTranslate, _maxTranslate be
set to? Fine, _currentTranslate and _currentHPR can be left at (0,0,0),
but are there better defaults for the min and max? Does the OpenFlight
spec give some appropriate defaults? And now that _currentScale is set
to (1,1,1), does it bother that it's not between _minScale and _maxScale
- which are both still at the default-constructed value of (0,0,0)?
I knew I shouldn't have opened the file to do the modification... :-)
J-S
--
__
Jean-Sebastien Guayjean-sebastien.g...@cm-labs.com
http://www.cm-labs.com/
http://whitestar02.webhop.org/
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
*
* This library is open source and may be redistributed and/or modified under
* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
* (at your option) any later version. The full license is in LICENSE file
* included with this distribution, and on the openscenegraph.org website.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* OpenSceneGraph Public License for more details.
*/
#include osgSim/DOFTransform
using namespace osgSim;
using namespace osg;
static const unsigned int TRANSLATION_X_LIMIT_BIT = 0x8000u 0;
static const unsigned int TRANSLATION_Y_LIMIT_BIT = 0x8000u 1;
static const unsigned int TRANSLATION_Z_LIMIT_BIT = 0x8000u 2;
static const unsigned int ROTATION_PITCH_LIMIT_BIT = 0x8000u 3;
static const unsigned int ROTATION_ROLL_LIMIT_BIT = 0x8000u 4;
static const unsigned int ROTATION_YAW_LIMIT_BIT = 0x8000u 5;
static const unsigned int SCALE_X_LIMIT_BIT= 0x8000u 6;
static const unsigned int SCALE_Y_LIMIT_BIT= 0x8000u 7;
static const unsigned int SCALE_Z_LIMIT_BIT= 0x8000u 8;
DOFTransform::DOFTransform():
_previousTraversalNumber(-1),
_previousTime(0.0),
_limitationFlags(0),
_animationOn(false),
_increasingFlags(0x),
_multOrder(PRH),
_currentScale(1.0f,1.0f,1.0f)
{
}
DOFTransform::DOFTransform(const DOFTransform dof, const osg::CopyOp copyop):
osg::Transform(dof, copyop),
_previousTraversalNumber(dof._previousTraversalNumber),
_previousTime(dof._previousTime),
_minHPR(dof._minHPR),
_maxHPR(dof._maxHPR),
_currentHPR(dof._currentHPR),
_incrementHPR(dof._incrementHPR),
_minTranslate(dof._minTranslate),
_maxTranslate(dof._maxTranslate),
_currentTranslate(dof._currentTranslate),
_incrementTranslate(dof._incrementTranslate),
_minScale(dof._minScale),
_maxScale(dof._maxScale),
_currentScale(dof._currentScale),
_incrementScale(dof._incrementScale),
_Put(dof._Put),
_inversePut(dof._inversePut),
_limitationFlags(dof._limitationFlags),
_animationOn(dof._animationOn),
_increasingFlags(dof._increasingFlags),
_multOrder(dof._multOrder)
{
if (_animationOn)
setNumChildrenRequiringUpdateTraversal(getNumChildrenRequiringUpdateTraversal()+1);
}
void DOFTransform::traverse(osg::NodeVisitor nv)
{
if (nv.getVisitorType()==osg::NodeVisitor::UPDATE_VISITOR)
{
// ensure that we do not operate on this node more than
// once during this traversal. This is an issue since node
// can be shared between multiple parents.
if ((nv.getTraversalNumber()!=_previousTraversalNumber)
nv.getFrameStamp())
{
double newTime = nv.getFrameStamp()-getSimulationTime();
animate((float)(newTime-_previousTime));
_previousTraversalNumber = nv.getTraversalNumber();
_previousTime = newTime;
}
}
Transform::traverse(nv);
}
bool DOFTransform::computeLocalToWorldMatrix(osg::Matrix
matrix,osg::NodeVisitor*) const
{
//put the PUT matrix first:
osg::Matrix l2w(getPutMatrix());
//now the current matrix:
osg::Matrix current;
current.makeTranslate(getCurrentTranslate());
//now create the local rotation:
if(_multOrder == PRH)
{
current.preMult(osg::Matrix::rotate(getCurrentHPR()[1], 1.0, 0.0,
0.0));//pitch
current.preMult(osg::Matrix::rotate(getCurrentHPR()[2], 0.0, 1.0,
Re: [osg-users] Transforming nodes
HI J-S In Creator/OpenFlight, the defaults for all the DOF min's and max's are all 0's and the step values are all 0's and of course the scale current is set to 1,1,1 Creator has a DOF Viewer and when min, max are zero its ignores them it only animates if you have a (Min or Max) and Step set to something other than zero __ Gordon Tomlinson gor...@gordontomlinson.com IM: gordon3db...@3dscenegraph.com www.vis-sim.com www.gordontomlinson.com www.PhotographyByGordon.com __ -Original Message- From: osg-users-boun...@lists.openscenegraph.org [mailto:osg-users-boun...@lists.openscenegraph.org] On Behalf Of Jean-Sébastien Guay Sent: Tuesday, December 22, 2009 6:09 PM To: osg-users@lists.openscenegraph.org Cc: OpenSceneGraph Submissions Subject: Re: [osg-users] Transforming nodes Hi Gordon, To me that seems a rather bad default to have for scaling on a DOF, I would have assumed the default would be 1,1,1 not 0,0,0 That's bitten me a few times too. Specifically when I create DOFs programmatically instead of reading an FLT file. Is there a reason why its 0,0,0, and not 1,1,1 and should we change it I think we could change it. Just need to beat the inertia of making such a simple change and sending the whole modified file... U... Ok! Did it! Uh, there are lots more uninitialized variables there... What should _minScale, _maxScale, _minHPR, _maxHPR, _minTranslate, _maxTranslate be set to? Fine, _currentTranslate and _currentHPR can be left at (0,0,0), but are there better defaults for the min and max? Does the OpenFlight spec give some appropriate defaults? And now that _currentScale is set to (1,1,1), does it bother that it's not between _minScale and _maxScale - which are both still at the default-constructed value of (0,0,0)? I knew I shouldn't have opened the file to do the modification... :-) J-S -- __ Jean-Sebastien Guayjean-sebastien.g...@cm-labs.com http://www.cm-labs.com/ http://whitestar02.webhop.org/ ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Transforming nodes
Hi Gordon, In Creator/OpenFlight, the defaults for all the DOF min's and max's are all 0's and the step values are all 0's and of course the scale current is set to 1,1,1 OK then the values that are now set should be correct (since the default ctor for Vec3 sets it to (0,0,0) ). J-S -- __ Jean-Sebastien Guayjean-sebastien.g...@cm-labs.com http://www.cm-labs.com/ http://whitestar02.webhop.org/ ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Transforming nodes
bump... I've managed to insert DOFTransform nodes into my model but the geometry under these nodes are not being drawn even though the drawable update callbacks are definitely being called... The weird thing is, if I replace the DOFTransform with a simple MatrixTransform, the geometry renders just fine. :? If I just leave the put and inverse put matrices as identity matrices, it should still render, right? what am I doing wrong?? -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=21732#21732 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Transforming nodes
Hi Oren, This mightn't be your problem, but for some reason the default scale for an osgSim::DOFTransform is (0,0,0). This is what I usually forget when using it. Cheers, Brendan -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=21757#21757 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Transforming nodes
wow, thank you guys for the great help... DOFTransform seems to be right on the money. Oren -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=21053#21053 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] Transforming nodes
Hello everyone! Here is my question: I have a model of a sea faring vessel that has little gadgets on it like radars, turrets, propellors, etc. these gadgets are fully contained in separate named Geodes. That means that the geometry in the geode is specified relative to the origin of the ship and not the point where the gadget is located. what is the best way to make these things transform (mainly rotate)? I was thinking I could parent the gadget Geode with a MatrixTransform node to create some kind of local coordinate system for the geometry of the gadget but then the geometry itself would have to be respecified relative to this geometry. can I somehow put a static transform between the MatrixTransform and the Geode in order to offset the positions of all the vertices so that the point that the gadget transforms around becomes the location of the MatrixTransform? Thanks in advance for your help! :D -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=20846#20846 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Transforming nodes
Have you looked at transform nodes other than MatrixTransform? Either osgSim::DOFTransform or osg::PositionAttitudeTransform lets you set a pivot point. I've seen this in the code but never used it. But it sounds like it would make it easier for you to compose the transformation that you need. Paul Martz Skew Matrix Software LLC _http://www.skew-matrix.com_ http://www.skew-matrix.com/ +1 303 859 9466 Oren Fromberg wrote: Hello everyone! Here is my question: I have a model of a sea faring vessel that has little gadgets on it like radars, turrets, propellors, etc. these gadgets are fully contained in separate named Geodes. That means that the geometry in the geode is specified relative to the origin of the ship and not the point where the gadget is located. what is the best way to make these things transform (mainly rotate)? I was thinking I could parent the gadget Geode with a MatrixTransform node to create some kind of local coordinate system for the geometry of the gadget but then the geometry itself would have to be respecified relative to this geometry. can I somehow put a static transform between the MatrixTransform and the Geode in order to offset the positions of all the vertices so that the point that the gadget transforms around becomes the location of the MatrixTransform? Thanks in advance for your help! :D -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=20846#20846 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Transforming nodes
Thanks for the suggestion... I'll definitely check it out. my other question is how do I modify the geometry on the gadgets to be located around an origin, namely the point around which the gadget transforms? so if my gadget is located at point (x,y,z), I want the point of articulation to be at (0, 0, 0). I was thinking I could put a transform right above the geode that offsets everything by (-x,-y,-z), and somehow use the Optimizer in osgUtils. any suggestions? Thanks again! -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=20848#20848 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Transforming nodes
Oren Fromberg wrote: Thanks for the suggestion... I'll definitely check it out. my other question is how do I modify the geometry on the gadgets to be located around an origin, namely the point around which the gadget transforms? so if my gadget is located at point (x,y,z), I want the point of articulation to be at (0, 0, 0). I was thinking I could put a transform right above the geode that offsets everything by (-x,-y,-z), and somehow use the Optimizer in osgUtils. any suggestions? That's one way to do it. If you're not familiar with the Optimizer, you'd want to use the FLATTEN_STATIC_TRANSFORMS bit. -Paul ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Transforming nodes
Paul Martz wrote: Have you looked at transform nodes other than MatrixTransform? Either osgSim::DOFTransform or osg::PositionAttitudeTransform lets you set a pivot point. I've seen this in the code but never used it. But it sounds like it would make it easier for you to compose the transformation that you need. Hi, Oren, osgSim::DOFTransform is exactly what you need here. What you'll want to do is set the inverse put matrix to the transform that puts the articulated part at the origin, and set the put matrix to the transform that will put it back. The position and orientation of the articulated part itself are specified by Vec3's (heading, pitch, roll for orientation). You can either use the setCurrent* methods to do the animation yourself, or the setIncrement* methods to have the animation done for you during the update traversal. --J ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
