Hi,
I'm new to OpenSG and I have some questions how to proceed in a Project
I'm working on. We evaluate to use OSG for this Task:
I must read a CAD model file of a digger-arm exported to VRML.
The model has 4 joints which should be steered by the keyboard to move
the arm.
My procedure so far:
* I exported the CAD model from Catia as VRML. The parts of the model,
which should be moved are grouped together.
* I wrote some OSG code:
* Simple GLUT display
* Reading the model with SceneFileHandler
* Finding the nodes which represent the arm-parts with the
NamedNodeFinder class from the examples.
* Adding a OSG::ComponentTransform as core of the nodes which get
modified when the keys are pressed.
* I had a problem with the rotation of the parts, as the pivot-point was
not on the joint of the arm, so I edited the file with Blender, moving
the pivot-points. That worked, the rotation was correct, but the
transformations were in local coordinate system and did not accumulate
from one part to another.
I realized that the VRML file has a Transformation (I assume to move the
part to its position), and then a geometry part inside it. Is the
Transformation automatically added as Core of the Node?
How can I forwarded the transformation of a parent joint to it's child?
I want to avoid reading the parts on its own and applying the
transformations from a 'description file' which tell me how the parts
assemble.
Thanks and regards,
Falco
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