quartOut          156 src/swfc-history.c 	case IF_QUART_OUT: return quartOut(fraction, p1, p2 - p1, inter->slope);
quartOut           85 src/swfc-interpolation.c     return quartOut(2 * fraction - 1, start + delta / 2, delta / 2, slope);
quartOut           79 src/swfc-interpolation.h float quartOut(float fraction, float start, float delta, float slope);