Hi,
I am attaching a screenshot of what I am trying to do. In the screenshot you
can see 2 objects placed on a terrain. The lower one is rotated about Z axis
and I use the keyboard UP and DOWN keys to move the object along the Y-axis in
the terrain.
However even after I have rotated the object, I am not able to figure out how
to get the new vector along which the object is now pointing.
I figured I would find the angle I have rotated the object by using Quat and
then depending on angle value 0-90, 90-180, 180-270 or 270-360, find the
tangent of the angle and move it that way. But I'm sure im complicating things
here.
The code I'm using to move the object and rotate is pasted below: (i've only
copied the cases for Up and rotate right as down and left are identical)
else if ( ea.getKey()==osgGA::GUIEventAdapter::KEY_Up)
{
std::cout << textBox->getText() << std::endl;
positionArray = PATCurrent->getPosition();
//vector = PATCurrent->getAttitude().asVec3();
PATCurrent->getAttitude().getRotate(angle,vector);
angleDegrees = osg::RadiansToDegrees(angle);
y = positionArray.y();
x = positionArray.x();
x += vector.x();
y += 1;
positionArray.y()=y;
positionArray.x()=x;
PATCurrent->setPosition(positionArray);
return true;
}
else if ( ea.getKey()==osgGA::GUIEventAdapter::KEY_Right)
{
//use key right to rotate the object to the right
quat = PATCurrent->getAttitude();
quat.getRotate(angle, vector);
angleDegrees = osg::RadiansToDegrees(angle);
//if angle is 0 make it 360
if(angleDegrees <= 1)
{
angleDegrees = 360;
}
angleDegrees -= 1;
quat.makeRotate(osg::DegreesToRadians(angleDegrees),vector);
PATCurrent->setAttitude(quat);
//PATCurrent->setPosition(vector);
}
If you can tell me what I am missing out here I'd be very thankful.
Also, if there is some literature out there that deals with this, I'd be more
than happy to study it.
Thanks,
Sincerely,
Sanat
------------------
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http://forum.openscenegraph.org/viewtopic.php?p=29505#29505
Attachments:
http://forum.openscenegraph.org//files/test_sc1_368.jpg
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