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interval: fix QuatInterval not normalizing the start quaternion

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This commit is contained in:
rdb 2019-02-14 19:17:13 +01:00
parent 2807d1d166
commit b75982a610
3 changed files with 7 additions and 2 deletions
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4
direct/src/interval/cLerpNodePathInterval.I
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@ -106,6 +106,8 @@ set_end_hpr(const LQuaternion &quat) {
* if either set_end_quat() or set_end_hpr() is also called. This parameter
* is optional; if unspecified, the value will be taken from the node's actual
* rotation at the time the lerp is performed.
*
* The given quaternion needs to be normalized.
*/
INLINE void CLerpNodePathInterval::
set_start_quat(const LQuaternion &quat) {
@ -143,6 +145,8 @@ set_end_quat(const LVecBase3 &hpr) {
* This replaces a previous call to set_end_hpr(). If neither set_end_quat()
* nor set_end_hpr() is called, the node's rotation will not be affected by
* the lerp.
*
* The given quaternion needs to be normalized.
*/
INLINE void CLerpNodePathInterval::
set_end_quat(const LQuaternion &quat) {

4
direct/src/interval/cLerpNodePathInterval.cxx
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@ -174,14 +174,14 @@ priv_step(double t) {
setup_slerp();
} else if ((_flags & F_bake_in_start) != 0) {
set_start_quat(transform->get_quat());
set_start_quat(transform->get_norm_quat());
setup_slerp();
} else {
if (_prev_d == 1.0) {
_start_quat = _end_quat;
} else {
LQuaternion prev_value = transform->get_quat();
LQuaternion prev_value = transform->get_norm_quat();
_start_quat = (prev_value - _prev_d * _end_quat) / (1.0 - _prev_d);
}
setup_slerp();

1
doc/ReleaseNotes
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@ -14,6 +14,7 @@ This is a bugfix release intended to fix several issues in 1.10.0.
* Depth buffer now defaults to 24-bit on macOS (fixes flickering)
* Fix no devices being detected on Windows with threading-model
* Implement collision tests from Capsule and Box into InvSphere
* Fix odd behavior and occasional crash in QuatInterval
* Fix SpriteAnim error in particle system
* Fix ShaderGenerator error when using too many shadowing lights
* Fix interrogate crash in Python 3 with optional wstring args