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#include "ManipulationPivot.h"
namespace selection
{
ManipulationPivot::ManipulationPivot() :
_needsRecalculation(true),
_operationActive(false),
_userLocked(false)
{}
// Returns the pivot-to-world transform
const Matrix4& ManipulationPivot::getMatrix4()
{
if (_needsRecalculation && !_operationActive && !_userLocked)
{
updateFromSelection();
}
return _pivot2World;
}
// Returns the position of the pivot point relative to origin
Vector3 ManipulationPivot::getVector3()
{
if (_needsRecalculation && !_operationActive && !_userLocked)
{
updateFromSelection();
}
return _pivot2World.translation();
}
void ManipulationPivot::setFromMatrix(const Matrix4& newPivot2World)
{
_pivot2World = newPivot2World;
}
void ManipulationPivot::setNeedsRecalculation(bool needsRecalculation)
{
_needsRecalculation = needsRecalculation;
}
void ManipulationPivot::setUserLocked(bool locked)
{
_userLocked = locked;
}
// Call this before an operation is started, such that later
// transformations can be applied on top of the correct starting point
void ManipulationPivot::beginOperation()
{
_pivot2WorldStart = _pivot2World;
_operationActive = true;
}
// Reverts the matrix to the state it had at the beginning of the operation
void ManipulationPivot::revertToStart()
{
_pivot2World = _pivot2WorldStart;
}
void ManipulationPivot::endOperation()
{
_pivot2WorldStart = _pivot2World;
_operationActive = false;
}
void ManipulationPivot::cancelOperation()
{
revertToStart();
_operationActive = false;
}
void ManipulationPivot::applyTranslation(const Vector3& translation)
{
// We apply translations on top of the starting point
revertToStart();
_pivot2World.translateBy(translation);
}
}
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