diff options
Diffstat (limited to 'core/math/quaternion.cpp')
| -rw-r--r-- | core/math/quaternion.cpp | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/core/math/quaternion.cpp b/core/math/quaternion.cpp index 0a650a8578..11bfcc1a6f 100644 --- a/core/math/quaternion.cpp +++ b/core/math/quaternion.cpp @@ -102,6 +102,22 @@ Quaternion Quaternion::inverse() const { return Quaternion(-x, -y, -z, w); } +Quaternion Quaternion::log() const { + Quaternion src = *this; + Vector3 src_v = src.get_axis() * src.get_angle(); + return Quaternion(src_v.x, src_v.y, src_v.z, 0); +} + +Quaternion Quaternion::exp() const { + Quaternion src = *this; + Vector3 src_v = Vector3(src.x, src.y, src.z); + float theta = src_v.length(); + if (theta < CMP_EPSILON) { + return Quaternion(0, 0, 0, 1); + } + return Quaternion(src_v.normalized(), theta); +} + Quaternion Quaternion::slerp(const Quaternion &p_to, const real_t &p_weight) const { #ifdef MATH_CHECKS ERR_FAIL_COND_V_MSG(!is_normalized(), Quaternion(), "The start quaternion must be normalized."); @@ -190,6 +206,9 @@ Quaternion::operator String() const { } Vector3 Quaternion::get_axis() const { + if (Math::abs(w) > 1 - CMP_EPSILON) { + return Vector3(x, y, z); + } real_t r = ((real_t)1) / Math::sqrt(1 - w * w); return Vector3(x * r, y * r, z * r); } |