556 lines
12 KiB
C
556 lines
12 KiB
C
#include "config.h"
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#include "clutter-easing.h"
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#include <math.h>
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double
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clutter_linear (double t,
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double d)
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{
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return t / d;
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}
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double
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clutter_ease_in_quad (double t,
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double d)
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{
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double p = t / d;
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return p * p;
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}
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double
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clutter_ease_out_quad (double t,
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double d)
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{
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double p = t / d;
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return -1.0 * p * (p - 2);
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}
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double
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clutter_ease_in_out_quad (double t,
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double d)
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{
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double p = t / (d / 2);
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if (p < 1)
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return 0.5 * p * p;
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p -= 1;
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return -0.5 * (p * (p - 2) - 1);
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}
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double
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clutter_ease_in_cubic (double t,
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double d)
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{
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double p = t / d;
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return p * p * p;
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}
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double
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clutter_ease_out_cubic (double t,
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double d)
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{
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double p = t / d - 1;
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return p * p * p + 1;
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}
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double
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clutter_ease_in_out_cubic (double t,
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double d)
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{
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double p = t / (d / 2);
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if (p < 1)
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return 0.5 * p * p * p;
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p -= 2;
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return 0.5 * (p * p * p + 2);
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}
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double
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clutter_ease_in_quart (double t,
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double d)
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{
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double p = t / d;
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return p * p * p * p;
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}
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double
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clutter_ease_out_quart (double t,
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double d)
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{
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double p = t / d - 1;
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return -1.0 * (p * p * p * p - 1);
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}
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double
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clutter_ease_in_out_quart (double t,
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double d)
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{
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double p = t / (d / 2);
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if (p < 1)
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return 0.5 * p * p * p * p;
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p -= 2;
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return -0.5 * (p * p * p * p - 2);
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}
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double
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clutter_ease_in_quint (double t,
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double d)
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{
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double p = t / d;
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return p * p * p * p * p;
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}
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double
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clutter_ease_out_quint (double t,
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double d)
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{
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double p = t / d - 1;
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return p * p * p * p * p + 1;
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}
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double
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clutter_ease_in_out_quint (double t,
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double d)
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{
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double p = t / (d / 2);
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if (p < 1)
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return 0.5 * p * p * p * p * p;
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p -= 2;
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return 0.5 * (p * p * p * p * p + 2);
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}
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double
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clutter_ease_in_sine (double t,
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double d)
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{
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return -1.0 * cos (t / d * G_PI_2) + 1.0;
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}
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double
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clutter_ease_out_sine (double t,
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double d)
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{
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return sin (t / d * G_PI_2);
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}
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double
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clutter_ease_in_out_sine (double t,
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double d)
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{
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return -0.5 * (cos (G_PI * t / d) - 1);
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}
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double
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clutter_ease_in_expo (double t,
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double d)
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{
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return (t == 0) ? 0.0 : pow (2, 10 * (t / d - 1));
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}
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double
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clutter_ease_out_expo (double t,
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double d)
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{
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return (t == d) ? 1.0 : -pow (2, -10 * t / d) + 1;
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}
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double
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clutter_ease_in_out_expo (double t,
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double d)
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{
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double p;
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if (t == 0)
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return 0.0;
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if (t == d)
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return 1.0;
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p = t / (d / 2);
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if (p < 1)
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return 0.5 * pow (2, 10 * (p - 1));
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p -= 1;
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return 0.5 * (-pow (2, -10 * p) + 2);
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}
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double
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clutter_ease_in_circ (double t,
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double d)
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{
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double p = t / d;
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return -1.0 * (sqrt (1 - p * p) - 1);
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}
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double
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clutter_ease_out_circ (double t,
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double d)
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{
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double p = t / d - 1;
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return sqrt (1 - p * p);
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}
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double
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clutter_ease_in_out_circ (double t,
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double d)
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{
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double p = t / (d / 2);
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if (p < 1)
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return -0.5 * (sqrt (1 - p * p) - 1);
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p -= 2;
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return 0.5 * (sqrt (1 - p * p) + 1);
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}
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double
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clutter_ease_in_elastic (double t,
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double d)
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{
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double p = d * .3;
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double s = p / 4;
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double q = t / d;
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if (q == 1)
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return 1.0;
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q -= 1;
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return -(pow (2, 10 * q) * sin ((q * d - s) * (2 * G_PI) / p));
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}
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double
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clutter_ease_out_elastic (double t,
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double d)
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{
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double p = d * .3;
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double s = p / 4;
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double q = t / d;
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if (q == 1)
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return 1.0;
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return pow (2, -10 * q) * sin ((q * d - s) * (2 * G_PI) / p) + 1.0;
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}
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double
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clutter_ease_in_out_elastic (double t,
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double d)
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{
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double p = d * (.3 * 1.5);
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double s = p / 4;
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double q = t / (d / 2);
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if (q == 2)
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return 1.0;
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if (q < 1)
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{
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q -= 1;
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return -.5 * (pow (2, 10 * q) * sin ((q * d - s) * (2 * G_PI) / p));
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}
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else
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{
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q -= 1;
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return pow (2, -10 * q)
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* sin ((q * d - s) * (2 * G_PI) / p)
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* .5 + 1.0;
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}
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}
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double
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clutter_ease_in_back (double t,
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double d)
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{
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double p = t / d;
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return p * p * ((1.70158 + 1) * p - 1.70158);
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}
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double
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clutter_ease_out_back (double t,
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double d)
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{
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double p = t / d - 1;
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return p * p * ((1.70158 + 1) * p + 1.70158) + 1;
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}
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double
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clutter_ease_in_out_back (double t,
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double d)
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{
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double p = t / (d / 2);
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double s = 1.70158 * 1.525;
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if (p < 1)
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return 0.5 * (p * p * ((s + 1) * p - s));
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p -= 2;
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return 0.5 * (p * p * ((s + 1) * p + s) + 2);
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}
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static inline double
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ease_out_bounce_internal (double t,
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double d)
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{
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double p = t / d;
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if (p < (1 / 2.75))
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{
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return 7.5625 * p * p;
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}
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else if (p < (2 / 2.75))
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{
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p -= (1.5 / 2.75);
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return 7.5625 * p * p + .75;
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}
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else if (p < (2.5 / 2.75))
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{
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p -= (2.25 / 2.75);
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return 7.5625 * p * p + .9375;
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}
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else
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{
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p -= (2.625 / 2.75);
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return 7.5625 * p * p + .984375;
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}
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}
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static inline double
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ease_in_bounce_internal (double t,
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double d)
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{
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return 1.0 - ease_out_bounce_internal (d - t, d);
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}
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double
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clutter_ease_in_bounce (double t,
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double d)
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{
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return ease_in_bounce_internal (t, d);
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}
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double
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clutter_ease_out_bounce (double t,
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double d)
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{
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return ease_out_bounce_internal (t, d);
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}
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double
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clutter_ease_in_out_bounce (double t,
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double d)
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{
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if (t < d / 2)
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return ease_in_bounce_internal (t * 2, d) * 0.5;
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else
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return ease_out_bounce_internal (t * 2 - d, d) * 0.5 + 1.0 * 0.5;
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}
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static inline double
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ease_steps_end (double p,
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int n_steps)
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{
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return floor (p * (double) n_steps) / (double) n_steps;
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}
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double
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clutter_ease_steps_start (double t,
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double d,
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int n_steps)
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{
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return 1.0 - ease_steps_end (1.0 - (t / d), n_steps);
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}
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double
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clutter_ease_steps_end (double t,
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double d,
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int n_steps)
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{
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return ease_steps_end ((t / d), n_steps);
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}
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static inline double
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x_for_t (double t,
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double x_1,
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double x_2)
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{
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double omt = 1.0 - t;
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return 3.0 * omt * omt * t * x_1
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+ 3.0 * omt * t * t * x_2
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+ t * t * t;
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}
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static inline double
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y_for_t (double t,
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double y_1,
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double y_2)
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{
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double omt = 1.0 - t;
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return 3.0 * omt * omt * t * y_1
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+ 3.0 * omt * t * t * y_2
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+ t * t * t;
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}
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static inline double
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t_for_x (double x,
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double x_1,
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double x_2)
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{
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double min_t = 0, max_t = 1;
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int i;
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for (i = 0; i < 30; ++i)
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{
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double guess_t = (min_t + max_t) / 2.0;
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double guess_x = x_for_t (guess_t, x_1, x_2);
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if (x < guess_x)
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max_t = guess_t;
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else
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min_t = guess_t;
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}
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return (min_t + max_t) / 2.0;
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}
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double
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clutter_ease_cubic_bezier (double t,
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double d,
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double x_1,
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double y_1,
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double x_2,
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double y_2)
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{
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double p = t / d;
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if (p == 0.0)
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return 0.0;
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if (p == 1.0)
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return 1.0;
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return y_for_t (t_for_x (p, x_1, x_2), y_1, y_2);
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}
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/*< private >
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* _clutter_animation_modes:
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*
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* A mapping of animation modes and easing functions.
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*/
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static const struct {
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ClutterAnimationMode mode;
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ClutterEasingFunc func;
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const char *name;
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} _clutter_animation_modes[] = {
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{ CLUTTER_CUSTOM_MODE, NULL, "custom" },
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{ CLUTTER_LINEAR, clutter_linear, "linear" },
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{ CLUTTER_EASE_IN_QUAD, clutter_ease_in_quad, "easeInQuad" },
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{ CLUTTER_EASE_OUT_QUAD, clutter_ease_out_quad, "easeOutQuad" },
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{ CLUTTER_EASE_IN_OUT_QUAD, clutter_ease_in_out_quad, "easeInOutQuad" },
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{ CLUTTER_EASE_IN_CUBIC, clutter_ease_in_cubic, "easeInCubic" },
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{ CLUTTER_EASE_OUT_CUBIC, clutter_ease_out_cubic, "easeOutCubic" },
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{ CLUTTER_EASE_IN_OUT_CUBIC, clutter_ease_in_out_cubic, "easeInOutCubic" },
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{ CLUTTER_EASE_IN_QUART, clutter_ease_in_quart, "easeInQuart" },
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{ CLUTTER_EASE_OUT_QUART, clutter_ease_out_quart, "easeOutQuart" },
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{ CLUTTER_EASE_IN_OUT_QUART, clutter_ease_in_out_quart, "easeInOutQuart" },
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{ CLUTTER_EASE_IN_QUINT, clutter_ease_in_quint, "easeInQuint" },
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{ CLUTTER_EASE_OUT_QUINT, clutter_ease_out_quint, "easeOutQuint" },
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{ CLUTTER_EASE_IN_OUT_QUINT, clutter_ease_in_out_quint, "easeInOutQuint" },
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{ CLUTTER_EASE_IN_SINE, clutter_ease_in_sine, "easeInSine" },
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{ CLUTTER_EASE_OUT_SINE, clutter_ease_out_sine, "easeOutSine" },
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{ CLUTTER_EASE_IN_OUT_SINE, clutter_ease_in_out_sine, "easeInOutSine" },
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{ CLUTTER_EASE_IN_EXPO, clutter_ease_in_expo, "easeInExpo" },
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{ CLUTTER_EASE_OUT_EXPO, clutter_ease_out_expo, "easeOutExpo" },
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{ CLUTTER_EASE_IN_OUT_EXPO, clutter_ease_in_out_expo, "easeInOutExpo" },
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{ CLUTTER_EASE_IN_CIRC, clutter_ease_in_circ, "easeInCirc" },
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{ CLUTTER_EASE_OUT_CIRC, clutter_ease_out_circ, "easeOutCirc" },
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{ CLUTTER_EASE_IN_OUT_CIRC, clutter_ease_in_out_circ, "easeInOutCirc" },
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{ CLUTTER_EASE_IN_ELASTIC, clutter_ease_in_elastic, "easeInElastic" },
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{ CLUTTER_EASE_OUT_ELASTIC, clutter_ease_out_elastic, "easeOutElastic" },
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{ CLUTTER_EASE_IN_OUT_ELASTIC, clutter_ease_in_out_elastic, "easeInOutElastic" },
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{ CLUTTER_EASE_IN_BACK, clutter_ease_in_back, "easeInBack" },
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{ CLUTTER_EASE_OUT_BACK, clutter_ease_out_back, "easeOutBack" },
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{ CLUTTER_EASE_IN_OUT_BACK, clutter_ease_in_out_back, "easeInOutBack" },
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{ CLUTTER_EASE_IN_BOUNCE, clutter_ease_in_bounce, "easeInBounce" },
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{ CLUTTER_EASE_OUT_BOUNCE, clutter_ease_out_bounce, "easeOutBounce" },
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{ CLUTTER_EASE_IN_OUT_BOUNCE, clutter_ease_in_out_bounce, "easeInOutBounce" },
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/* the parametrized functions need a cast */
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{ CLUTTER_STEPS, (ClutterEasingFunc) clutter_ease_steps_end, "steps" },
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{ CLUTTER_STEP_START, (ClutterEasingFunc) clutter_ease_steps_start, "stepStart" },
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{ CLUTTER_STEP_END, (ClutterEasingFunc) clutter_ease_steps_end, "stepEnd" },
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{ CLUTTER_CUBIC_BEZIER, (ClutterEasingFunc) clutter_ease_cubic_bezier, "cubicBezier" },
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{ CLUTTER_EASE, (ClutterEasingFunc) clutter_ease_cubic_bezier, "ease" },
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{ CLUTTER_EASE_IN, (ClutterEasingFunc) clutter_ease_cubic_bezier, "easeIn" },
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{ CLUTTER_EASE_OUT, (ClutterEasingFunc) clutter_ease_cubic_bezier, "easeOut" },
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{ CLUTTER_EASE_IN_OUT, (ClutterEasingFunc) clutter_ease_cubic_bezier, "easeInOut" },
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{ CLUTTER_ANIMATION_LAST, NULL, "sentinel" },
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};
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ClutterEasingFunc
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clutter_get_easing_func_for_mode (ClutterAnimationMode mode)
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{
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g_assert (_clutter_animation_modes[mode].mode == mode);
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g_assert (_clutter_animation_modes[mode].func != NULL);
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return _clutter_animation_modes[mode].func;
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}
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const char *
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clutter_get_easing_name_for_mode (ClutterAnimationMode mode)
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{
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g_assert (_clutter_animation_modes[mode].mode == mode);
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g_assert (_clutter_animation_modes[mode].func != NULL);
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return _clutter_animation_modes[mode].name;
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}
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double
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clutter_easing_for_mode (ClutterAnimationMode mode,
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double t,
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double d)
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{
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g_assert (_clutter_animation_modes[mode].mode == mode);
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g_assert (_clutter_animation_modes[mode].func != NULL);
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return _clutter_animation_modes[mode].func (t, d);
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}
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