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Expose get_skew for transform2d and add new constructor

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Expose set_scale and set_skew for transform2d

Replacing float by real_t

Adding const parameters

Updated transform2d doc
This commit is contained in:
Vincent D
2021-09-02 11:36:19 +02:00
parent 18c0f0b3ba
commit aa82cb6f35
5 changed files with 74 additions and 29 deletions
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22
core/math/transform_2d.cpp
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@@ -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();