diff options
Diffstat (limited to 'src/corelib/tools/qeasingcurve.cpp')
| -rw-r--r-- | src/corelib/tools/qeasingcurve.cpp | 16 |
1 files changed, 11 insertions, 5 deletions
diff --git a/src/corelib/tools/qeasingcurve.cpp b/src/corelib/tools/qeasingcurve.cpp index 2708901866..409ebd1de5 100644 --- a/src/corelib/tools/qeasingcurve.cpp +++ b/src/corelib/tools/qeasingcurve.cpp @@ -1232,6 +1232,8 @@ void QEasingCurve::setOvershoot(qreal overshoot) It is only applicable if type() is QEasingCurve::BezierSpline. Note that the spline implicitly starts at (0.0, 0.0) and has to end at (1.0, 1.0) to be a valid easing curve. + \a c1 and \a c2 are the control points used for drawing the curve. + \a endPoint is the endpoint of the curve. */ void QEasingCurve::addCubicBezierSegment(const QPointF & c1, const QPointF & c2, const QPointF & endPoint) { @@ -1290,8 +1292,12 @@ QVector<QPointF> static inline tcbToBezier(const TCBPoints &tcbPoints) It is only applicable if type() is QEasingCurve::TCBSpline. The spline has to start explitly at (0.0, 0.0) and has to end at (1.0, 1.0) to be a valid easing curve. - The three parameters are called tension, continuity and bias. All three parameters are - valid between -1 and 1 and define the tangent of the control point. + The tension \a t changes the length of the tangent vector. + The continuity \a c changes the sharpness in change between the tangents. + The bias \a b changes the direction of the tangent vector. + \a nextPoint is the sample position. + All three parameters are valid between -1 and 1 and define the + tangent of the control point. If all three parameters are 0 the resulting spline is a Catmull-Rom spline. The begin and endpoint always have a bias of -1 and 1, since the outer tangent is not defined. */ @@ -1390,7 +1396,7 @@ void QEasingCurve::setType(Type type) /*! Sets a custom easing curve that is defined by the user in the function \a func. The signature of the function is qreal myEasingFunction(qreal progress), - where \e progress and the return value is considered to be normalized between 0 and 1. + where \e progress and the return value are considered to be normalized between 0 and 1. (In some cases the return value can be outside that range) After calling this function type() will return QEasingCurve::Custom. \a func cannot be zero. @@ -1420,8 +1426,8 @@ QEasingCurve::EasingFunction QEasingCurve::customType() const /*! Return the effective progress for the easing curve at \a progress. - While \a progress must be between 0 and 1, the returned effective progress - can be outside those bounds. For instance, QEasingCurve::InBack will + Whereas \a progress must be between 0 and 1, the returned effective progress + can be outside those bounds. For example, QEasingCurve::InBack will return negative values in the beginning of the function. */ qreal QEasingCurve::valueForProgress(qreal progress) const |