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patch [#29726] Enable looping with Follow Path constraint and cyclic curves. by Peter Amstutz (tetron)

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Campbell Barton 2011-12-30 14:52:03 +00:00
parent d7d856a23d
commit 532afede02
1 changed files with 13 additions and 1 deletions
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14
source/blender/blenkernel/intern/constraint.c
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@ -1255,6 +1255,7 @@ static void followpath_get_tarmat (bConstraint *con, bConstraintOb *cob, bConstr
float quat[4];
if ((data->followflag & FOLLOWPATH_STATIC) == 0) {
/* animated position along curve depending on time */
Nurb *nu = cu->nurb.first;
curvetime= cu->ctime - data->offset;
/* ctime is now a proper var setting of Curve which gets set by Animato like any other var that's animated,
@ -1264,7 +1265,18 @@ static void followpath_get_tarmat (bConstraint *con, bConstraintOb *cob, bConstr
* factor, which then gets clamped to lie within 0.0 - 1.0 range
*/
curvetime /= cu->pathlen;
CLAMP(curvetime, 0.0f, 1.0f);
if (nu && nu->flagu & CU_NURB_CYCLIC) {
/* If the curve is cyclic, enable looping around if the time is
* outside the bounds 0..1 */
if ((curvetime < 0.0f) || (curvetime > 1.0f)) {
curvetime -= floor(curvetime);
}
}
else {
/* The curve is not cyclic, so clamp to the begin/end points. */
CLAMP(curvetime, 0.0f, 1.0f);
}
}
else {
/* fixed position along curve */