exponentialOut    165 src/swfc-history.c 		case IF_EXPONENTIAL_OUT: return exponentialOut(fraction, p1, p2 - p1);
exponentialOut    138 src/swfc-interpolation.c     return exponentialOut(2 * fraction - 1, start + delta / 2, delta / 2);
exponentialOut     91 src/swfc-interpolation.h float exponentialOut(float fraction, float start, float delta);