Added various functions basic math classes. Also enabled math checks only for debug builds.

Added set_scale, set_rotation_euler, set_rotation_axis_angle. Addresses #2565 directly.
Added an euler angle constructor for Basis in GDScript and also exposed is_normalized for vectors and quaternions.
Various other changes mostly cosmetic in nature.

1 files changed, 6 insertions, 3 deletions

diff --git a/core/math/math_2d.cpp b/core/math/math_2d.cpp
index 77cff6a052..c6f8e41ae5 100644
--- a/core/math/math_2d.cpp
+++ b/core/math/math_2d.cpp
@@ -62,7 +62,8 @@ Vector2 Vector2::normalized() const {
 }
 
 bool Vector2::is_normalized() const {
-	return Math::isequal_approx(length(), (real_t)1.0);
+	// use length_squared() instead of length() to avoid sqrt(), makes it more stringent.
+	return Math::is_equal_approx(length_squared(), 1.0);
 }
 
 real_t Vector2::distance_to(const Vector2 &p_vector2) const {
@@ -280,7 +281,7 @@ Vector2 Vector2::cubic_interpolate(const Vector2 &p_b, const Vector2 &p_pre_a, c
 
 // slide returns the component of the vector along the given plane, specified by its normal vector.
 Vector2 Vector2::slide(const Vector2 &p_n) const {
-#ifdef DEBUG_ENABLED
+#ifdef MATH_CHECKS
 	ERR_FAIL_COND_V(p_n.is_normalized() == false, Vector2());
 #endif
 	return *this - p_n * this->dot(p_n);
@@ -291,7 +292,7 @@ Vector2 Vector2::bounce(const Vector2 &p_n) const {
 }
 
 Vector2 Vector2::reflect(const Vector2 &p_n) const {
-#ifdef DEBUG_ENABLED
+#ifdef MATH_CHECKS
 	ERR_FAIL_COND_V(p_n.is_normalized() == false, Vector2());
 #endif
 	return 2.0 * p_n * this->dot(p_n) - *this;
@@ -438,7 +439,9 @@ Transform2D Transform2D::inverse() const {
 void Transform2D::affine_invert() {
 
 	real_t det = basis_determinant();
+#ifdef MATH_CHECKS
 	ERR_FAIL_COND(det == 0);
+#endif
 	real_t idet = 1.0 / det;
 
 	SWAP(elements[0][0], elements[1][1]);