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self modifying variables made clang unhappy. retooled circular ease methods

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basis: http://gizma.com/easing/#circ1
This commit is contained in:
Azaezel 2016-10-14 13:00:27 -05:00
parent 1131ed15df
commit d50762cbef
1 changed files with 6 additions and 4 deletions
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10
Engine/source/math/mEase.h
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@ -289,13 +289,15 @@ inline F32 mEaseInOutExpo(F32 t, F32 b, F32 c, F32 d)
// t: current time, b: beginning value, c: change in position, d: duration
inline F32 mEaseInCirc (F32 t, F32 b, F32 c, F32 d)
{
return -c * (mSqrt(1 - (t/=d)*t) - 1) + b;
t/=d;
return -c * (mSqrt(1 - (t)*t) - 1) + b;
};
// circular easing out - decelerating to zero velocity
inline F32 mEaseOutCirc (F32 t, F32 b, F32 c, F32 d)
{
return c * mSqrt(1 - (t=t/d-1)*t) + b;
t/=d;
return c * mSqrt(1 - (t-1)*t) + b;
};
// circular easing in/out - acceleration until halfway, then deceleration
@ -303,8 +305,8 @@ inline F32 mEaseInOutCirc(F32 t, F32 b, F32 c, F32 d)
{
if ((t/=d/2) < 1)
return -c/2 * (mSqrt(1 - t*t) - 1) + b;
return c/2 * (mSqrt(1 - (t-=2)*t) + 1) + b;
t-=2;
return c/2 * (mSqrt(1 - (t)*t) + 1) + b;
};