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ecore/animator: simpler code

This commit is contained in:
ChunEon Park 2014-12-05 23:24:16 +09:00
parent 2e1032e28f
commit 44f0f3e170
1 changed files with 9 additions and 3 deletions
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12
src/lib/ecore/ecore_anim.c
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@ -317,9 +317,15 @@ _pos_map_cubic_bezier(double pos,
if (x1 == y1 && x2 == y2) return pos;
/* Bezier Cubic formula:
y(t) = (1 - t)^3 + 3t(1 - t)^2 + 3t^2(1 - t) + t^3 */
return (pow((1 - pos), 3) * 0) + (3 * pos * pow((1 - pos), 2) * y1) +
(3 * pow(pos, 2) * (1 - pos) * y2) + (pow(pos, 3) * 1);
y(t) = (1 - t)^3 + 3t(1 - t)^2 + 3t^2(1 - t) + t^3 */
/* orignal */
// return (pow((1 - pos), 3) * 0) + (3 * pos * pow((1 - pos), 2) * y1) +
// (3 * pow(pos, 2) * (1 - pos) * y2) + (pow(pos, 3) * 1);
/* simpler one */
return (3 * pos * pow((1 - pos), 2) * y1) +
(3 * pow(pos, 2) * (1 - pos) * y2) + (pow(pos, 3) * 1);
}
#define DBL_TO(Fp) eina_f32p32_double_to(Fp)