Remove Basis::set_scale and Basis::set_rotation_* functions.

Those functions were added in #8277 but they did more harm than good. They're subtle, don't do what people think and requires users to understand the non-uniqueness of polar decomposition. They ended up confusing people.

Until we store additional information enough to make a unique polar decomposition, these functions shouldn't be a part of Basis.

2 files changed, 0 insertions, 37 deletions

diff --git a/core/math/matrix3.cpp b/core/math/matrix3.cpp
index c7e2a8f307..57555bbb2a 100644
--- a/core/math/matrix3.cpp
+++ b/core/math/matrix3.cpp
@@ -254,17 +254,6 @@ Vector3 Basis::get_scale() const {
 							  Vector3(elements[0][2], elements[1][2], elements[2][2]).length());
 }
 
-// Sets scaling while preserving rotation.
-// This requires some care when working with matrices with negative determinant,
-// since we're using a particular convention for "polar" decomposition in get_scale and get_rotation.
-// For details, see the explanation in get_scale.
-void Basis::set_scale(const Vector3 &p_scale) {
-	Vector3 e = get_euler();
-	Basis(); // reset to identity
-	scale(p_scale);
-	rotate(e);
-}
-
 // Multiplies the matrix from left by the rotation matrix: M -> R.M
 // Note that this does *not* rotate the matrix itself.
 //
@@ -316,28 +305,6 @@ void Basis::get_rotation_axis_angle(Vector3 &p_axis, real_t &p_angle) const {
 	m.get_axis_angle(p_axis, p_angle);
 }
 
-// Sets rotation while preserving scaling.
-// This requires some care when working with matrices with negative determinant,
-// since we're using a particular convention for "polar" decomposition in get_scale and get_rotation.
-// For details, see the explanation in get_scale.
-void Basis::set_rotation_euler(const Vector3 &p_euler) {
-	Vector3 s = get_scale();
-	Basis(); // reset to identity
-	scale(s);
-	rotate(p_euler);
-}
-
-// Sets rotation while preserving scaling.
-// This requires some care when working with matrices with negative determinant,
-// since we're using a particular convention for "polar" decomposition in get_scale and get_rotation.
-// For details, see the explanation in get_scale.
-void Basis::set_rotation_axis_angle(const Vector3 &p_axis, real_t p_angle) {
-	Vector3 s = get_scale();
-	Basis(); // reset to identity
-	scale(s);
-	rotate(p_axis, p_angle);
-}
-
 // get_euler_xyz returns a vector containing the Euler angles in the format
 // (a1,a2,a3), where a3 is the angle of the first rotation, and a1 is the last
 // (following the convention they are commonly defined in the literature).
diff --git a/core/math/matrix3.h b/core/math/matrix3.h
index be85c244bd..be8de2e1c4 100644
--- a/core/math/matrix3.h
+++ b/core/math/matrix3.h
@@ -81,9 +81,6 @@ public:
 	Vector3 get_rotation() const;
 	void get_rotation_axis_angle(Vector3 &p_axis, real_t &p_angle) const;
 
-	void set_rotation_euler(const Vector3 &p_euler);
-	void set_rotation_axis_angle(const Vector3 &p_axis, real_t p_angle);
-
 	Vector3 get_euler_xyz() const;
 	void set_euler_xyz(const Vector3 &p_euler);
 	Vector3 get_euler_yxz() const;
@@ -99,7 +96,6 @@ public:
 	Basis scaled(const Vector3 &p_scale) const;
 
 	Vector3 get_scale() const;
-	void set_scale(const Vector3 &p_scale);
 
 	// transposed dot products
 	_FORCE_INLINE_ real_t tdotx(const Vector3 &v) const {