Expose get_skew for transform2d and add new constructor

Expose set_scale and set_skew for transform2d

Replacing float by real_t

Adding const parameters

Updated transform2d doc

2 files changed, 30 insertions, 19 deletions

diff --git a/core/math/transform_2d.cpp b/core/math/transform_2d.cpp
index 16934d67df..060b619892 100644
--- a/core/math/transform_2d.cpp
+++ b/core/math/transform_2d.cpp
@@ -63,7 +63,7 @@ Transform2D Transform2D::affine_inverse() const {
 	return inv;
 }
 
-void Transform2D::rotate(real_t p_phi) {
+void Transform2D::rotate(const real_t p_phi) {
 	*this = Transform2D(p_phi, Vector2()) * (*this);
 }
 
@@ -72,7 +72,7 @@ real_t Transform2D::get_skew() const {
 	return Math::acos(elements[0].normalized().dot(SGN(det) * elements[1].normalized())) - Math_PI * 0.5;
 }
 
-void Transform2D::set_skew(float p_angle) {
+void Transform2D::set_skew(const real_t p_angle) {
 	real_t det = basis_determinant();
 	elements[1] = SGN(det) * elements[0].rotated((Math_PI * 0.5 + p_angle)).normalized() * elements[1].length();
 }
@@ -81,7 +81,7 @@ real_t Transform2D::get_rotation() const {
 	return Math::atan2(elements[0].y, elements[0].x);
 }
 
-void Transform2D::set_rotation(real_t p_rot) {
+void Transform2D::set_rotation(const real_t p_rot) {
 	Size2 scale = get_scale();
 	real_t cr = Math::cos(p_rot);
 	real_t sr = Math::sin(p_rot);
@@ -92,7 +92,7 @@ void Transform2D::set_rotation(real_t p_rot) {
 	set_scale(scale);
 }
 
-Transform2D::Transform2D(real_t p_rot, const Vector2 &p_pos) {
+Transform2D::Transform2D(const real_t p_rot, const Vector2 &p_pos) {
 	real_t cr = Math::cos(p_rot);
 	real_t sr = Math::sin(p_rot);
 	elements[0][0] = cr;
@@ -102,6 +102,14 @@ Transform2D::Transform2D(real_t p_rot, const Vector2 &p_pos) {
 	elements[2] = p_pos;
 }
 
+Transform2D::Transform2D(const real_t p_rot, const Size2 &p_scale, const real_t p_skew, const Vector2 &p_pos) {
+	elements[0][0] = Math::cos(p_rot) * p_scale.x;
+	elements[1][1] = Math::cos(p_rot + p_skew) * p_scale.y;
+	elements[1][0] = -Math::sin(p_rot + p_skew) * p_scale.y;
+	elements[0][1] = Math::sin(p_rot) * p_scale.x;
+	elements[2] = p_pos;
+}
+
 Size2 Transform2D::get_scale() const {
 	real_t det_sign = SGN(basis_determinant());
 	return Size2(elements[0].length(), det_sign * elements[1].length());
@@ -126,7 +134,7 @@ void Transform2D::scale_basis(const Size2 &p_scale) {
 	elements[1][1] *= p_scale.y;
 }
 
-void Transform2D::translate(real_t p_tx, real_t p_ty) {
+void Transform2D::translate(const real_t p_tx, const real_t p_ty) {
 	translate(Vector2(p_tx, p_ty));
 }
 
@@ -231,7 +239,7 @@ Transform2D Transform2D::translated(const Vector2 &p_offset) const {
 	return copy;
 }
 
-Transform2D Transform2D::rotated(real_t p_phi) const {
+Transform2D Transform2D::rotated(const real_t p_phi) const {
 	Transform2D copy = *this;
 	copy.rotate(p_phi);
 	return copy;
@@ -241,7 +249,7 @@ real_t Transform2D::basis_determinant() const {
 	return elements[0].x * elements[1].y - elements[0].y * elements[1].x;
 }
 
-Transform2D Transform2D::interpolate_with(const Transform2D &p_transform, real_t p_c) const {
+Transform2D Transform2D::interpolate_with(const Transform2D &p_transform, const real_t p_c) const {
 	//extract parameters
 	Vector2 p1 = get_origin();
 	Vector2 p2 = p_transform.get_origin();
diff --git a/core/math/transform_2d.h b/core/math/transform_2d.h
index 34cfd0c1a9..6ed3af2ba7 100644
--- a/core/math/transform_2d.h
+++ b/core/math/transform_2d.h
@@ -68,17 +68,17 @@ struct Transform2D {
 	void affine_invert();
 	Transform2D affine_inverse() const;
 
-	void set_rotation(real_t p_rot);
+	void set_rotation(const real_t p_rot);
 	real_t get_rotation() const;
 	real_t get_skew() const;
-	void set_skew(float p_angle);
-	_FORCE_INLINE_ void set_rotation_and_scale(real_t p_rot, const Size2 &p_scale);
-	_FORCE_INLINE_ void set_rotation_scale_and_skew(real_t p_rot, const Size2 &p_scale, float p_skew);
-	void rotate(real_t p_phi);
+	void set_skew(const real_t p_angle);
+	_FORCE_INLINE_ void set_rotation_and_scale(const real_t p_rot, const Size2 &p_scale);
+	_FORCE_INLINE_ void set_rotation_scale_and_skew(const real_t p_rot, const Size2 &p_scale, const real_t p_skew);
+	void rotate(const real_t p_phi);
 
 	void scale(const Size2 &p_scale);
 	void scale_basis(const Size2 &p_scale);
-	void translate(real_t p_tx, real_t p_ty);
+	void translate(const real_t p_tx, const real_t p_ty);
 	void translate(const Vector2 &p_translation);
 
 	real_t basis_determinant() const;
@@ -92,7 +92,7 @@ struct Transform2D {
 	Transform2D scaled(const Size2 &p_scale) const;
 	Transform2D basis_scaled(const Size2 &p_scale) const;
 	Transform2D translated(const Vector2 &p_offset) const;
-	Transform2D rotated(real_t p_phi) const;
+	Transform2D rotated(const real_t p_phi) const;
 
 	Transform2D untranslated() const;
 
@@ -110,7 +110,7 @@ struct Transform2D {
 	void operator*=(const real_t p_val);
 	Transform2D operator*(const real_t p_val) const;
 
-	Transform2D interpolate_with(const Transform2D &p_transform, real_t p_c) const;
+	Transform2D interpolate_with(const Transform2D &p_transform, const real_t p_c) const;
 
 	_FORCE_INLINE_ Vector2 basis_xform(const Vector2 &p_vec) const;
 	_FORCE_INLINE_ Vector2 basis_xform_inv(const Vector2 &p_vec) const;
@@ -123,7 +123,7 @@ struct Transform2D {
 
 	operator String() const;
 
-	Transform2D(real_t xx, real_t xy, real_t yx, real_t yy, real_t ox, real_t oy) {
+	Transform2D(const real_t xx, const real_t xy, const real_t yx, const real_t yy, const real_t ox, const real_t oy) {
 		elements[0][0] = xx;
 		elements[0][1] = xy;
 		elements[1][0] = yx;
@@ -138,7 +138,10 @@ struct Transform2D {
 		elements[2] = p_origin;
 	}
 
-	Transform2D(real_t p_rot, const Vector2 &p_pos);
+	Transform2D(const real_t p_rot, const Vector2 &p_pos);
+
+	Transform2D(const real_t p_rot, const Size2 &p_scale, const real_t p_skew, const Vector2 &p_pos);
+
 	Transform2D() {
 		elements[0][0] = 1.0;
 		elements[1][1] = 1.0;
@@ -185,14 +188,14 @@ Rect2 Transform2D::xform(const Rect2 &p_rect) const {
 	return new_rect;
 }
 
-void Transform2D::set_rotation_and_scale(real_t p_rot, const Size2 &p_scale) {
+void Transform2D::set_rotation_and_scale(const real_t p_rot, const Size2 &p_scale) {
 	elements[0][0] = Math::cos(p_rot) * p_scale.x;
 	elements[1][1] = Math::cos(p_rot) * p_scale.y;
 	elements[1][0] = -Math::sin(p_rot) * p_scale.y;
 	elements[0][1] = Math::sin(p_rot) * p_scale.x;
 }
 
-void Transform2D::set_rotation_scale_and_skew(real_t p_rot, const Size2 &p_scale, float p_skew) {
+void Transform2D::set_rotation_scale_and_skew(const real_t p_rot, const Size2 &p_scale, const real_t p_skew) {
 	elements[0][0] = Math::cos(p_rot) * p_scale.x;
 	elements[1][1] = Math::cos(p_rot + p_skew) * p_scale.y;
 	elements[1][0] = -Math::sin(p_rot + p_skew) * p_scale.y;