Hi folks. I posted this question in <a href="http://stackoverflow.com/questions/7810632/how-to-use-and-set-axes-in-a-3d-scene">stackoverflow</a> more than 3 weeks ago, unsuccessfully.<div>----------<div><div>I'm creating a simulator coded in python and based on ODE (Open Dynamics Engine). For visualization I chose VTK.</div>
<div><br></div><div>For every object in the simulation, I create a corresponding source (e.g. vtkCubeSource), mapper and actor. I am able to show objects correctly and update them as the simulation runs.</div><div><br></div>
<div>I want to add axes to have a point of reference and to show the direction of each axis. Doing that I realized that, by default, X and Z are in the plane of the screen and Y points outwards. In my program I have a different convention.</div>
<div><br></div><div>I've been able to display axes in 2 ways:</div><div><br></div><div>1) <a href="http://imagepaste.nullnetwork.net/viewimage.php?id=2610">Image 1</a></div><div><br></div><div> axes = vtk.vtkAxes()</div>
<div> axesMapper = vtk.vtkPolyDataMapper()</div><div> axesMapper.SetInputConnection(axes.GetOutputPort())</div><div> axesActor = vtk.vtkActor()</div><div> axesActor.SetMapper(axesMapper)</div><div> axesActor.GetProperty().SetLineWidth(4)</div>
<div><br></div><div>2) <a href="http://imagepaste.nullnetwork.net/viewimage.php?id=2611">Image 2</a> (colors do not match with the first case)</div><div><br></div><div> axesActor = vtk.vtkAxesActor()</div><div> axesActor.AxisLabelsOn()</div>
<div> axesActor.SetShaftTypeToCylinder()</div><div> axesActor.SetCylinderRadius(0.05)</div><div><br></div><div>In the second one, the user is allowed to set many parameters related to how the axis are displayed. In the first one, I only managed to set the line width but nothing else.</div>
<div><br></div><div>So, my questions are:</div><div><br></div><div> - Which is the correct way to define and display axes in a 3D scene? I just want them in a fixed position and orientation.</div><div> - How can I set a different convention for the axes orientation, both for their display and the general visualization?</div>
<div><br></div><div>Thanks,</div><div>Germán</div><div><br></div>-- <br>Germán Larrain<br>
</div></div>