fastBounceInOut   181 src/swfc-history.c 		case IF_FAST_BOUNCE_IN_OUT: return fastBounceInOut(fraction, p1, p2 - p1, inter->bounces, inter->growth, inter->damping);
fastBounceInOut   112 src/swfc-interpolation.h float fastBounceInOut(float fraction, float start, float delta, int bounces, float growth, float damping);