elasticInOut      172 src/swfc-history.c 		case IF_ELASTIC_IN_OUT: return elasticInOut(fraction, p1, p2 - p1, inter->amplitude, inter->bounces, inter->damping);
elasticInOut      100 src/swfc-interpolation.h float elasticInOut(float fraction, float start, float delta, float amplitude, int bounces, float damping);