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[3.x] Fix cubic interpolate when looping #58651

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Mar 4, 2022
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[3.x] Fix cubic interpolate when looping #58651

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12 changes: 10 additions & 2 deletions scene/resources/animation.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -1718,11 +1718,19 @@ T Animation::_interpolate(const Vector<TKey<T>> &p_keys, float p_time, Interpola
case INTERPOLATION_CUBIC: {
int pre = idx - 1;
if (pre < 0) {
pre = 0;
if (loop && p_loop_wrap) {
pre = len - 1;
} else {
pre = 0;
}
}
int post = next + 1;
if (post >= len) {
post = next;
if (loop && p_loop_wrap) {
post = 0;
} else {
post = next;
}
}

return _cubic_interpolate(p_keys[pre].value, p_keys[idx].value, p_keys[next].value, p_keys[post].value, c);
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