I followed the example of osgkeyboardmouse to replace a picked node with
a Scribe node and the picked object as a child.
The problem I'm having is that the picked object disappears for a frame
after I pick it. In other other words after the scene is drawn once
then the picked object appears as it should.
I'm using:
wxWidgets (2.6.) as a gui
OSG 1.2 (downloaded from web, but compiled by me)
Producer::RenderSurface as the drawing surface
Windows XP Pro
MS VS 8 Express Edition
Inside my "render" function I have something like this:
{
sceneView->setViewport(0,0,renderSurface->getWindowWidth(),
renderSurface->getWindowHeight());
// Update view and projection matrices
sceneView->setProjectionMatrixAsOrtho(-ortho_zoom_factor*aspectRatio,
ortho_zoom_factor*aspectRatio,
-ortho_zoom_factor,
ortho_zoom_factor,
-200, 200);
sceneView->setViewMatrix(viewMatrix);
renderSurface->makeCurrent();
// do the update traversal the scene graph - such as updating
// animations
sceneView->update();
sceneView->cull();
sceneView->draw();
renderSurface->sync();
// Swap Buffers
renderSurface->swapBuffers();
}
My pick function does the picking, modifies the geometry shared by the
sceneView's root node, and calls the wxWidgets function Refresh() which
causes my "render" function to get called (which it is).
Again, after I render the scene once, the picked object disappears, and
then subsequent frame renderings the object appears with the scribe
look. If I unpick an object (remove the scribe node) the unpicked node
appears right away (after only a single frame draw).
Thanks,
James
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