template <typename T> T bounceInOut(T t) {
if (t < 0.5) {
return 0.5 * bounceIn(t * 2.);
} else {
return 0.5 * bounceOut(t * 2. - 1.) + 0.5;
}
}
float interpolateScalar(float p1, float p2, float fraction, interpolation_t* inter)
{
if (!inter)
return linear(fraction, p1, p2 - p1);
switch (inter->function)
{
case IF_LINEAR: return linear(fraction, p1, p2 - p1);
case IF_QUAD_IN: return quadIn(fraction, p1, p2 - p1, inter->slope);
case IF_QUAD_OUT: return quadOut(fraction, p1, p2 - p1, inter->slope);
case IF_QUAD_IN_OUT: return quadInOut(fraction, p1, p2 - p1, inter->slope);
case IF_CUBIC_IN: return cubicIn(fraction, p1, p2 - p1, inter->slope);
case IF_CUBIC_OUT: return cubicOut(fraction, p1, p2 - p1, inter->slope);
case IF_CUBIC_IN_OUT: return cubicInOut(fraction, p1, p2 - p1, inter->slope);
case IF_QUART_IN: return quartIn(fraction, p1, p2 - p1, inter->slope);
case IF_QUART_OUT: return quartOut(fraction, p1, p2 - p1, inter->slope);
case IF_QUART_IN_OUT: return quartInOut(fraction, p1, p2 - p1, inter->slope);
case IF_QUINT_IN: return quintIn(fraction, p1, p2 - p1, inter->slope);
case IF_QUINT_OUT: return quintOut(fraction, p1, p2 - p1, inter->slope);
case IF_QUINT_IN_OUT: return quintInOut(fraction, p1, p2 - p1, inter->slope);
case IF_CIRCLE_IN: return circleIn(fraction, p1, p2 - p1, inter->slope);
case IF_CIRCLE_OUT: return circleOut(fraction, p1, p2 - p1, inter->slope);
case IF_CIRCLE_IN_OUT: return circleInOut(fraction, p1, p2 - p1, inter->slope);
case IF_EXPONENTIAL_IN: return exponentialIn(fraction, p1, p2 - p1);
case IF_EXPONENTIAL_OUT: return exponentialOut(fraction, p1, p2 - p1);
case IF_EXPONENTIAL_IN_OUT: return exponentialInOut(fraction, p1, p2 - p1);
case IF_SINE_IN: return sineIn(fraction, p1, p2 - p1);
case IF_SINE_OUT: return sineOut(fraction, p1, p2 - p1);
case IF_SINE_IN_OUT: return sineInOut(fraction, p1, p2 - p1);
case IF_ELASTIC_IN: return elasticIn(fraction, p1, p2 - p1, inter->amplitude, inter->bounces, inter->damping);
case IF_ELASTIC_OUT: return elasticOut(fraction, p1, p2 - p1, inter->amplitude, inter->bounces, inter->damping);
case IF_ELASTIC_IN_OUT: return elasticInOut(fraction, p1, p2 - p1, inter->amplitude, inter->bounces, inter->damping);
case IF_BACK_IN: return backIn(fraction, p1, p2 - p1, inter->speed);
case IF_BACK_OUT: return backOut(fraction, p1, p2 - p1, inter->speed);
case IF_BACK_IN_OUT: return backInOut(fraction, p1, p2 - p1, inter->speed);
case IF_BOUNCE_IN: return bounceIn(fraction, p1, p2 - p1, inter->bounces, inter->growth, inter->damping);
case IF_BOUNCE_OUT: return bounceOut(fraction, p1, p2 - p1, inter->bounces, inter->growth, inter->damping);
case IF_BOUNCE_IN_OUT: return bounceInOut(fraction, p1, p2 - p1, inter->bounces, inter->growth, inter->damping);
case IF_FAST_BOUNCE_IN: return fastBounceIn(fraction, p1, p2 - p1, inter->bounces, inter->growth, inter->damping);
case IF_FAST_BOUNCE_OUT: return fastBounceOut(fraction, p1, p2 - p1, inter->bounces, inter->growth, inter->damping);
case IF_FAST_BOUNCE_IN_OUT: return fastBounceInOut(fraction, p1, p2 - p1, inter->bounces, inter->growth, inter->damping);
default: return linear(fraction, p1, p2 - p1);
}
}
