Am 01.08.2015 um 08:59 schrieb Elias Tarasov:
Hi!
I have .ac models. One is a quadrocopter and two others are it's engines. Each
engine has propeller, which i want to animate by rotation. To do it, i have to
find propeler's node for the start. What i was able to find that two ways are
exist.
First is to find a node by it's name.
Second is to find a node by it's "unique characteristics".
Here is models:
https://drive.google.com/file/d/0ByDDImhSolf6cnVIN3JIMzJQTGs/view?usp=sharing
So the 1st question:
How to determine, the name of the node or it's other characteristics, to be
able to find it?
Using NodeVisitors is the way to go with scenegraphs.
I developed simple program that searches a node by it's name. Something, that looks like
a node's name i found when open .ac file using notepad and search for the
"name" tag. But im not sure.
Here is code:
https://drive.google.com/file/d/0ByDDImhSolf6U3BmTXpjeE1mRDg/view?usp=sharing
The problem: NodeVisitor finds a node( though im not sure this node is a
propeller), but NodeCallback doesn't rotate it.
So the 2nd question: Why the element, identified by it's name, does not rotate?
The reason, why im sure that these models should be able to rotate anyway, is
that i took them from another app, based on OSG and it works well.
Your sample code isn't what I would consider minimal, so it is hard to
spot an obvious error.
But I don't see how the MatrixTransform is related to your scene graph.
You need to do something like this inside your callback
for (p : node->getParents())
{
p->removeChild(node);
p->addChild(matrixTrans);
}
matrixTrans->addChild(node)
Your code simply adds a new parent, so the propeller is most likely
drawn twice the time you would expect.
Btw. If your visitor is looking for the node-name only you don't have to
implement anything else but the apply(Node) as even the
osg::Geode/osg::Drawables and are osg::Node-derived since version 3.3.0.
Cheers
Sebastian
Thank you!
Cheers,
Elias
------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=64557#64557
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