org.skia.jetskidemo.VSphereAnimator Class Reference

Public Member Functions
	VSphereAnimator (float x, float y, float r)
void	animate (float dt)
Matrix	getMatrix ()
void	fling (float dx, float dy)
void	startDrag (MotionEvent e)
void	drag (MotionEvent e)

Detailed Description

Definition at line 82 of file CubeActivity.java.

Constructor & Destructor Documentation

VSphereAnimator()

org.skia.jetskidemo.VSphereAnimator.VSphereAnimator ( float  x, float  y, float  r  )

inline

Definition at line 91 of file CubeActivity.java.

                                                      {
        mCenterX = x;
        mCenterY = y;
        mRadius  = r;
    }

Member Function Documentation

animate()

void org.skia.jetskidemo.VSphereAnimator.animate ( float  dt )

inline

Definition at line 97 of file CubeActivity.java.

                                  {
        final float kDecay = 0.99f;
 
        rotate(mRotAxis, mRotSpeed * dt);
 
        mRotSpeed *= kDecay;
    }

drag()

void org.skia.jetskidemo.VSphereAnimator.drag ( MotionEvent  e )

inline

Definition at line 123 of file CubeActivity.java.

                                    {
        Vec3 u = mCurrentDrag,                  // previous drag position
             v = normalVec(e.getX(), e.getY()); // new drag position
 
        float angle = (float)Math.acos(Math.max(-1, Math.min(1, u.dot(v)/u.length()/v.length())));
        Vec3   axis = u.cross(v).normalize();
 
        rotate(axis, angle);
 
        mCurrentDrag = v;
    }

fling()

void org.skia.jetskidemo.VSphereAnimator.fling ( float  dx, float  dy  )

inline

Definition at line 109 of file CubeActivity.java.

                                          {
        Vec3 u = normalVec(mCenterX, mCenterY),
             v = normalVec(mCenterX + dx, mCenterY + dy);
        mRotAxis = u.cross(v).normalize();
 
        double flingSpeed = Math.sqrt(dx*dx + dy*dy)/mRadius;
        mRotSpeed = (float)(flingSpeed*Math.PI);
    }

getMatrix()

Matrix org.skia.jetskidemo.VSphereAnimator.getMatrix ( )

inline

Definition at line 105 of file CubeActivity.java.

                              {
        return mRotMatrix;
    }

startDrag()

void org.skia.jetskidemo.VSphereAnimator.startDrag ( MotionEvent  e )

inline

Definition at line 118 of file CubeActivity.java.

                                         {
        mCurrentDrag = normalVec(e.getX(), e.getY());
        mRotSpeed = 0;
    }

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

• third_party/skia/platform_tools/android/apps/jetskidemo/src/main/java/org/skia/jetskidemo/CubeActivity.java