quadIn            149 src/swfc-history.c 	case IF_QUAD_IN: return quadIn(fraction, p1, p2 - p1, inter->slope);
quadIn             44 src/swfc-interpolation.c     return quadIn(1 - fraction, start + delta, -delta, slope);
quadIn             50 src/swfc-interpolation.c         return quadIn(2 * fraction, start, delta / 2, slope);
quadIn             70 src/swfc-interpolation.h float quadIn(float fraction, float start, float delta, float slope);