Differential D11057 Diff 36450 source/blender/blenkernel/intern/fcurve.c

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source/blender/blenkernel/intern/fcurve.c

Show First 20 Lines • Show All 175 Lines • ▼ Show 20 Lines	void BKE_fcurves_copy(ListBase dst, ListBase src)

/* Copy one-by-one. */		/* Copy one-by-one. */
for (sfcu = src->first; sfcu; sfcu = sfcu->next) {		for (sfcu = src->first; sfcu; sfcu = sfcu->next) {
dfcu = BKE_fcurve_copy(sfcu);		dfcu = BKE_fcurve_copy(sfcu);
BLI_addtail(dst, dfcu);		BLI_addtail(dst, dfcu);
}		}
}		}

/** Callback used by lib_query to walk over all ID usages (mimics `foreach_id` callback of		/**
* `IDTypeInfo` structure). */		* Callback used by lib_query to walk over all ID usages (mimics `foreach_id` callback of
		* `IDTypeInfo` structure).
		*/
void BKE_fcurve_foreach_id(FCurve fcu, LibraryForeachIDData data)		void BKE_fcurve_foreach_id(FCurve fcu, LibraryForeachIDData data)
{		{
ChannelDriver *driver = fcu->driver;		ChannelDriver *driver = fcu->driver;

if (driver != NULL) {		if (driver != NULL) {
LISTBASE_FOREACH (DriverVar *, dvar, &driver->variables) {		LISTBASE_FOREACH (DriverVar *, dvar, &driver->variables) {
/* only used targets */		/* only used targets */
DRIVER_TARGETS_USED_LOOPER_BEGIN (dvar) {		DRIVER_TARGETS_USED_LOOPER_BEGIN (dvar) {
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}		}

/** \} */		/** \} */

/* -------------------------------------------------------------------- */		/* -------------------------------------------------------------------- */
/** \name F-Curve Calculations		/** \name F-Curve Calculations
* \{ */		* \{ */

/* The length of each handle is not allowed to be more		/**
		* The length of each handle is not allowed to be more
* than the horizontal distance between (v1-v4).		* than the horizontal distance between (v1-v4).
* This is to prevent curve loops.		* This is to prevent curve loops.
*		*
* This function is very similar to BKE_curve_correct_bezpart(), but allows a steeper tangent for		* This function is very similar to BKE_curve_correct_bezpart(), but allows a steeper tangent for
* more snappy animations. This is not desired for other areas in which curves are used, though.		* more snappy animations. This is not desired for other areas in which curves are used, though.
*/		*/
void BKE_fcurve_correct_bezpart(const float v1[2], float v2[2], float v3[2], const float v4[2])		void BKE_fcurve_correct_bezpart(const float v1[2], float v2[2], float v3[2], const float v4[2])
{		{
Show All 30 Lines	void BKE_fcurve_correct_bezpart(const float v1[2], float v2[2], float v3[2], const float v4[2])

if (len2 > len) {		if (len2 > len) {
fac = len / len2;		fac = len / len2;
v3[0] = (v4[0] - fac * h2[0]);		v3[0] = (v4[0] - fac * h2[0]);
v3[1] = (v4[1] - fac * h2[1]);		v3[1] = (v4[1] - fac * h2[1]);
}		}
}		}

/** Find roots of cubic equation (c0 x³ + c1 x² + c2 x + c3)		/**
		.
		* Find roots of cubic equation (c0 x³ + c1 x² + c2 x + c3)
* \return number of roots in `o`.		* \return number of roots in `o`.
* NOTE: it is up to the caller to allocate enough memory for `o`. */		*
		* \note it is up to the caller to allocate enough memory for `o`.
		*/
static int solve_cubic(double c0, double c1, double c2, double c3, float *o)		static int solve_cubic(double c0, double c1, double c2, double c3, float *o)
{		{
double a, b, c, p, q, d, t, phi;		double a, b, c, p, q, d, t, phi;
int nr = 0;		int nr = 0;

if (c3 != 0.0) {		if (c3 != 0.0) {
a = c2 / c3;		a = c2 / c3;
b = c1 / c3;		b = c1 / c3;
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