-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 03/22/2010 09:04 PM, Garrett Cope wrote: > Hi, > > To Cedric - or anyone else well versed with MorphGeometry in > osgAnimation: > > I'm attempting to implement a coordinate interpolator. Basically, > animating a mesh with vertex-independent transforms. It seems to me > that MorphGeometry should accomplish this, but after digging > through the functionality either I am misunderstanding it or maybe > trying to use it in an unintended way. > > It's easy enough to set up an initial MorphGeometry 'A' and a > single morph target 'B'. But now let's say we want to morph from > the new target 'B' to another target 'C'. I see how to set multiple > morph targets for a single transition like A to .5B+.5C but how > would I set it up to go from A to B to C? > > Thanks in advance, Jamie > > ------------------ Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=25984#25984 > > > > > > _______________________________________________ osg-users mailing > list [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > Hi > Jamie,
Looking in the source code seems that morph geometry is able to do
multiple target. I think you can add multiple shape then control the
contribution of each shape to the final result. I am not the original
author, so i let him to adjust my answer.
from MorphGeometry.cpp:
/ bool initialized = false;
if (_method == NORMALIZED)
{
// base * 1 - (sum of weights) + sum of (weight * target)
float baseWeight = 0;
for (unsigned int i=0; i < _morphTargets.size(); i++)
{
baseWeight += _morphTargets[i].getWeight();
}
baseWeight = 1 - baseWeight;
if (baseWeight != 0)
{
initialized = true;
for (unsigned int i=0; i < pos->size(); i++)
{
(*pos)[i] = _positionSource[i] * baseWeight;
}
if (_morphNormals)
{
for (unsigned int i=0; i < normal->size(); i++)
{
(*normal)[i] = _normalSource[i] * baseWeight;
}
}
}
}
else //if (_method == RELATIVE)
{
// base + sum of (weight * target)
initialized = true;
for (unsigned int i=0; i < pos->size(); i++)
{
(*pos)[i] = _positionSource[i];
}
if (_morphNormals)
{
for (unsigned int i=0; i < normal->size(); i++)
{
(*normal)[i] = _normalSource[i];
}
}
}
/
Cheers,
Cedric
- --
Provide OpenGL services around OpenSceneGraph and more
+33 659 598 614 Cedric Pinson mailto:[email protected]
http://www.plopbyte.net
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