void DaisyWheelTool::frame(void)
{
if(active)
{
/* Update the selection ray: */
selectionRay=calcInteractionRay();
/* Calculate the intersection point of selection ray and daisy wheel: */
Ray wheelRay=selectionRay;
wheelRay.inverseTransform(wheelTransform);
if(wheelRay.getDirection()[1]!=Scalar(0))
{
Scalar lambda=(Scalar(0)-wheelRay.getOrigin()[1])/wheelRay.getDirection()[1];
if(lambda>=Scalar(0))
{
Point wheelPoint=wheelRay(lambda);
/* Calculate the zoom angle and zoom strength: */
zoomStrength=(Geometry::mag(wheelPoint)-factory->innerRadius)*Scalar(0.5)/(factory->outerRadius-factory->innerRadius);
if(zoomStrength<Scalar(0))
zoomStrength=Scalar(0);
else if(zoomStrength>Scalar(0.75))
zoomStrength=Scalar(0.75);
if(zoomStrength>Scalar(0))
{
zoomAngle=Math::atan2(wheelPoint[0],wheelPoint[2]);
if(zoomAngle<Scalar(0))
zoomAngle=Scalar(2)*Math::Constants<Scalar>::pi+zoomAngle;
}
}
}
}
}
void PlaneSnapInputDeviceTool::buttonCallback(int,InputDevice::ButtonCallbackData* cbData)
{
if(cbData->newButtonState) // Button has just been pressed
{
/* Try activating the tool: */
if(interactionDevice->isRayDevice())
{
/* Pick a virtual input device using ray selection: */
activate(calcInteractionRay());
}
else
{
/* Pick a virtual input device using point selection: */
activate(getInteractionPosition());
}
/* Check if the tool was activated: */
if(isActive())
{
/* Check if there are currently three selected points: */
if(numSelectedPoints==3)
{
/* Snap the selected virtual input device to the plane defined by the three selected points: */
Vector y=Geometry::cross(selectedPoints[1]-selectedPoints[0],selectedPoints[2]-selectedPoints[0]);
Scalar offset=(selectedPoints[0]*y+selectedPoints[1]*y+selectedPoints[2]*y)/Scalar(3);
Vector x=Geometry::normal(y);
Point devicePos=getInverseNavigationTransformation().transform(getGrabbedDevice()->getPosition());
Scalar lambda=(offset-devicePos*y)/Geometry::sqr(y);
devicePos+=y*lambda;
NavTransform dt=NavTransform(devicePos-Point::origin,NavTransform::Rotation::fromBaseVectors(x,y),Scalar(1));
dt.leftMultiply(getNavigationTransformation());
getGrabbedDevice()->setTransformation(TrackerState(dt.getTranslation(),dt.getRotation()));
}
/* Deactivate the tool again: */
deactivate();
}
else
{
/* Start dragging another selection point: */
if(numSelectedPoints==3)
numSelectedPoints=0;
draggingPoint=true;
++numSelectedPoints;
}
}
else // Button has just been released
{
/* Stop dragging a selection point: */
draggingPoint=false;
}
}
void RayInputDeviceTool::frame(void)
{
if(isActive())
{
/* Update the interaction ray: */
interactionRay=calcInteractionRay();
/* Drag the box dragger: */
dragger.drag(interactionRay);
/* Set the grabbed device's position and orientation: */
getGrabbedDevice()->setTransformation(dragger.getCurrentTransformation());
}
}
