cubicIn           152 src/swfc-history.c 	case IF_CUBIC_IN: return cubicIn(fraction, p1, p2 - p1, inter->slope);
cubicIn            61 src/swfc-interpolation.c     return cubicIn(1 - fraction, start + delta, -delta, slope);
cubicIn            67 src/swfc-interpolation.c         return cubicIn(2 * fraction, start, delta / 2, slope);
cubicIn            74 src/swfc-interpolation.h float cubicIn(float fraction, float start, float delta, float slope);