RotateAnimator Class Reference

Public Member Functions
void	update (SkV3 axis, SkScalar angle)
SkM44	rotation ()
void	start ()
void	reset ()
bool	isAnimating () const

Detailed Description

Definition at line 171 of file 3DSlide.cpp.

Member Function Documentation

isAnimating()

bool RotateAnimator::isAnimating ( ) const

inline

Definition at line 231 of file 3DSlide.cpp.

{ return fAngleSpeed != 0; }

reset()

void RotateAnimator::reset ( )

inline

Definition at line 225 of file 3DSlide.cpp.

                 {
        fAngleSpeed = 0;
        fAngle = 0;
        fPrevAngle = 1234567;
    }

rotation()

SkM44 RotateAnimator::rotation ( )

inline

Definition at line 197 of file 3DSlide.cpp.

                     {
        if (fAngleSpeed > 0) {
            double now = SkTime::GetSecs();
            double dtime = now - fPrevNow;
            fPrevNow = now;
            double delta = fAngleSign * fAngleSpeed * dtime;
            fAngle += delta;
            fAngleSpeed -= kSlowDown * dtime;
            if (fAngleSpeed < 0) {
                fAngleSpeed = 0;
            }
        }
        return SkM44::Rotate(fAxis, fAngle);
 
    }

start()

void RotateAnimator::start ( )

inline

Definition at line 213 of file 3DSlide.cpp.

                 {
        if (fPrevNow != fNow) {
            fAngleSpeed = (fAngle - fPrevAngle) / (fNow - fPrevNow);
            fAngleSign = fAngleSpeed < 0 ? -1 : 1;
            fAngleSpeed = std::min(kMaxSpeed, std::abs(fAngleSpeed));
        } else {
            fAngleSpeed = 0;
        }
        fPrevNow = SkTime::GetSecs();
        fAngle = 0;
    }

update()

void RotateAnimator::update ( SkV3  axis, SkScalar  angle  )

inline

Definition at line 185 of file 3DSlide.cpp.

                                           {
        if (angle != fPrevAngle) {
            fPrevAngle = fAngle;
            fAngle = angle;
 
            fPrevNow = fNow;
            fNow = SkTime::GetSecs();
 
            fAxis = axis;
        }
    }

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The documentation for this class was generated from the following file:

• third_party/skia/tools/viewer/3DSlide.cpp