forked from enlightenment/efl
ecore/animator: simpler code
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2e1032e28f
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@ -317,9 +317,15 @@ _pos_map_cubic_bezier(double pos,
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if (x1 == y1 && x2 == y2) return pos;
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/* Bezier Cubic formula:
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y(t) = (1 - t)^3 + 3t(1 - t)^2 + 3t^2(1 - t) + t^3 */
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return (pow((1 - pos), 3) * 0) + (3 * pos * pow((1 - pos), 2) * y1) +
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(3 * pow(pos, 2) * (1 - pos) * y2) + (pow(pos, 3) * 1);
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y(t) = (1 - t)^3 + 3t(1 - t)^2 + 3t^2(1 - t) + t^3 */
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/* orignal */
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// return (pow((1 - pos), 3) * 0) + (3 * pos * pow((1 - pos), 2) * y1) +
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// (3 * pow(pos, 2) * (1 - pos) * y2) + (pow(pos, 3) * 1);
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/* simpler one */
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return (3 * pos * pow((1 - pos), 2) * y1) +
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(3 * pow(pos, 2) * (1 - pos) * y2) + (pow(pos, 3) * 1);
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}
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#define DBL_TO(Fp) eina_f32p32_double_to(Fp)
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