Hi,
On Mon, 2008-12-01 at 15:38 +0800, Gerrit Voss wrote:
> Hi,
>
> On Sun, 2008-11-30 at 22:47 +0100, Christoph Schäfer wrote:
> > Hi Marcus,
> >
> > thanks for your suggestion! Unfortunatly something else must be missing.
> > I've set the pointers of "trans" and "scene" to MTRectPrt. Now the torus
> > is not turning any more.. but this time even not if the
> > ...->getChangeList()->applyAndClear(); are commented in. Attached is the
> > code. So I'm still stuck with this ;)
>
> hmm interesting. I'll have a version running on linux, but it does not
> seem too work on Windows. I'll have a look.
>
the following works.
kind regards,
gerrit
// all needed include files
#include <OpenSG/OSGGLUT.h>
#include <OpenSG/OSGConfig.h>
#include <OpenSG/OSGSimpleGeometry.h>
#include <OpenSG/OSGGLUTWindow.h>
#include <OpenSG/OSGSimpleSceneManager.h>
#include <OpenSG/OSGThreadManager.h>
OSG_USING_NAMESPACE
SimpleSceneManager *mgr;
//NodeRecPtr scene;
NodeMTRecPtr scene;
//we will store the transformation globally - this
//is not necessary, but comfortable
//TransformRecPtr trans;
TransformMTRecPtr trans;
Thread *animationThread;
Thread *applicationThread;
Barrier *syncBarrier;
int setupGLUT(int *argc, char *argv[]);
NodeTransitPtr createScenegraph(void)
{
// the scene must be created here
NodeRecPtr n = makeTorus(.5,2,16,16);
//add a simple Transformation
trans = Transform::create();
Matrix m;
m.setIdentity();
trans->setMatrix(m);
NodeRecPtr transNode = Node::create();
transNode->setCore(trans);
transNode->addChild(n);
return NodeTransitPtr(transNode);
}
//this function will run in a thread and simply will
//rotate the cube by setting a new transformation matrix
void rotate(void *args)
{
// sync this thread to the main thread, i.e. pull in all changes
done
// during scene construction
syncBarrier->enter(2);
applicationThread->getChangeList()->applyNoClear();
syncBarrier->enter(2);
commitChangesAndClear();
// we won't stop calculating new matrices....
while(true)
{
Real32 time = glutGet(GLUT_ELAPSED_TIME);
Matrix m;
m.setIdentity();
m.setRotate(Quaternion(Vec3f(0,1,0), time/1000));
trans->setMatrix(m);
// nothing unusual until here
commitChanges();
//well that's new...
//wait until two threads are cought in the
//same barrier
syncBarrier->enter(2); // barrier (1)
//just the same again
syncBarrier->enter(2); // barrier (2)
}
}
int main(int argc, char **argv)
{
osgInit(argc,argv);
{
int winid = setupGLUT(&argc, argv);
GLUTWindowMTRecPtr gwin = GLUTWindow::create();
gwin->setGlutId(winid);
gwin->init();
scene = createScenegraph();
//create the barrier, that will be used to
//synchronize threads
//instead of NULL you could provide a name
syncBarrier = Barrier::get(NULL);
mgr = new SimpleSceneManager;
mgr->setWindow(gwin );
mgr->setRoot (scene);
mgr->showAll();
commitChanges();
// store a pointer to the application thread
applicationThread = dynamic_cast<Thread
*>(ThreadManager::getAppThread());
//create the thread that will run generation of new
matrices
animationThread = dynamic_cast<Thread
*>(ThreadManager::the()->getThread("anim"));
//do it...
animationThread->runFunction(rotate, 1, NULL);
// wait for animationThread to complete its sync
syncBarrier->enter(2);
syncBarrier->enter(2);
commitChanges();
}
glutMainLoop();
return 0;
}
void reshape(int w, int h)
{
mgr->resize(w, h);
glutPostRedisplay();
}
void display(void)
{
// we wait here until the animation thread enters
// barrier (1)
syncBarrier->enter(2);
//now we sync data
animationThread->getChangeList()->applyAndClear();
// now wait for animation thread to enter barrier (2)
syncBarrier->enter(2);
commitChanges();
// !!!! Attention
// you will find a more detailed description
// of what's going on here in the documentation
// itself!
// now render...
mgr->redraw();
}
void mouse(int button, int state, int x, int y)
{
if (state)
mgr->mouseButtonRelease(button, x, y);
else
mgr->mouseButtonPress(button, x, y);
glutPostRedisplay();
}
void motion(int x, int y)
{
mgr->mouseMove(x, y);
glutPostRedisplay();
}
int setupGLUT(int *argc, char *argv[])
{
glutInit(argc, argv);
glutInitDisplayMode(GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE);
int winid = glutCreateWindow("OpenSG First Application");
glutDisplayFunc(display);
glutMouseFunc(mouse);
glutMotionFunc(motion);
glutReshapeFunc(reshape);
glutIdleFunc(display);
return winid;
}
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