Hi Laurence,
Before i dig into can you give the stacktrace to have an idea where it
crashes ?
Cheers,
Cedric
Laurence Muller wrote:
Hi Cedric,
I tried to create a simple project based on the 'osganimationmorph'
demo as Robert Osfield suggested.
Instead of loading the geometries from a *.osg file, I define two new
geometries (both quads but on a different position). These geometries
are added as a drawable to the MorphGeometry.
However, for some reason OSG doesn't allows me to swap the old geom0
and geom1 geometry objects with the ones I create. The application
crashes when you try to run it.
Any suggestions?
Kind regards,
- Laurence
Cedric Pinson wrote:
<div class="moz-text-flowed" style="font-family: -moz-fixed">Hi
Laurence,
You can easily do it with morphgeometry:
- define two geometry with morphgeometry
- use an custom update callback that use an ease motion to control
the ratio of geometry to use
Would be great to make an example with it, it will help others users.
Cheers,
Cedric
Laurence Muller wrote:
Hi,
In the application I am working on, I am trying to create a smooth
(transition) animation on the vertices inside an object.
Example:
I have included an illustration to make my problem a bit more clear.
The current scene contains one geode with a geometry attached.
The geometry is filled with 7 quads (4 vertices per quad) and is
illustrated as red dots in the picture. (The 'edges' are stored in a
separate geode)
The application allows users to select a specific layout (radial,
force based, etc) for the quads. In the current implementation this
change happens immediately.
(It updates the vertex array with new values and uses the dirty()
call on the vertex array).
On the OSG wiki page I found some information about animating
objects in the scene graph.
http://www.openscenegraph.org/projects/osg/wiki/Community/NodeKits/osgAnimation
http://www.robertpenner.com/easing/easing_demo.html
However, it seems like this will only work on geode level (by
modifying the Matrix or PositionAttitudeTransformation).
Another problem with this method is that it seems that you need to
create a predefined animation.
In my case the new position of a vertex will depend on the current
position (and the animation only needs to be used once).
Question:
- Is there a way to use the osgAnimation functions on the vertex
array and is it possible to use it with the transition methods from
the EaseMotion demo?
Kind regards,
- Laurence
------------------------------------------
Laurence Muller
Website/Blog/Portfolio:
http://www.multigesture.net/
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