bool
RotateScreen::adjustVelocity (int size, int invert)
{
float xrot;
if (mMoving)
xrot = mMoveTo + (mXrot + mBaseXrot);
else
{
xrot = mXrot;
if (mXrot < -180.0f / size)
xrot = 360.0f / size + mXrot;
else if (mXrot > 180.0f / size)
xrot = mXrot - 360.0f / size;
}
float adjust = -xrot * 0.05f * optionGetAcceleration ();
float amount = fabs (xrot);
if (amount < 10.0f)
amount = 10.0f;
else if (amount > 30.0f)
amount = 30.0f;
if (mSlow)
adjust *= 0.05f;
mXVelocity = (amount * mXVelocity + adjust) / (amount + 2.0f);
float yrot = mYrot;
/* Only snap if more than 2 viewports */
if (size > 2)
{
if (mYrot > 50.0f && ((mSnapTop && invert == 1) ||
(mSnapBottom && invert != 1)))
yrot -= 90.f;
else if (mYrot < -50.0f && ((mSnapTop && invert != 1) ||
(mSnapBottom && invert == 1)))
yrot += 90.f;
}
adjust = -yrot * 0.05f * optionGetAcceleration ();
amount = fabs (mYrot);
if (amount < 10.0f)
amount = 10.0f;
else if (amount > 30.0f)
amount = 30.0f;
mYVelocity = (amount * mYVelocity + adjust) / (amount + 2.0f);
return (fabs (xrot) < 0.1f && fabs (mXVelocity) < 0.2f &&
fabs (yrot) < 0.1f && fabs (mYVelocity) < 0.2f);
}
bool
PrivateCubeScreen::adjustVelocity ()
{
float unfold, adjust, amount;
if (mUnfolded)
unfold = 1.0f - mUnfold;
else
unfold = 0.0f - mUnfold;
adjust = unfold * 0.02f * optionGetAcceleration ();
amount = fabs (unfold);
if (amount < 1.0f)
amount = 1.0f;
else if (amount > 3.0f)
amount = 3.0f;
mUnfoldVelocity = (amount * mUnfoldVelocity + adjust) /
(amount + 2.0f);
return (fabs (unfold) < 0.002f && fabs (mUnfoldVelocity) < 0.01f);
}