21 #ifndef GF_TRANSFORM_H 22 #define GF_TRANSFORM_H 32 #ifndef DOXYGEN_SHOULD_SKIP_THIS 62 :
cos(std::cos(angle)),
sin(std::sin(angle))
73 cos = std::cos(angle);
74 sin = std::sin(angle);
83 return std::atan2(
sin,
cos);
98 rotation.cos * point.x - rotation.sin * point.y,
99 rotation.sin * point.x + rotation.cos * point.y
114 rotation.cos * point.x + rotation.sin * point.y,
115 -rotation.sin * point.x + rotation.cos * point.y
178 return { point.x + translation.offset.x, point.y + translation.offset.y };
191 return { point.x - translation.offset.x, point.y - translation.offset.y };
280 translation.setOffset(offset);
289 return translation.getOffset();
304 return transform(trans.translation, transform(trans.rotation, point));
317 return inverseTransform(trans.rotation, inverseTransform(trans.translation, point));
331 Vector2f
transform(
const Matrix3f& mat, Vector2f point) {
332 return { mat.xx * point.x + mat.xy * point.y + mat.xz, mat.yx * point.x + mat.yy * point.y + mat.yz };
355 return Matrix3f(1.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 0.0f, 1.0f);
368 1.0f, 0.0f, offset.x,
369 0.0f, 1.0f, offset.y,
392 float cos = std::cos(angle);
393 float sin = std::sin(angle);
411 float cos = std::cos(angle);
412 float sin = std::sin(angle);
414 cos, -sin, center.x * (1 - cos) + center.y * sin,
415 sin, cos, center.y * (1 - cos) - center.x * sin,
437 GF_API void rotate(Matrix3f& mat,
float angle, Vector2f center);
449 factor.x, 0.0f, 0.0f,
450 0.0f, factor.y, 0.0f,
464 Matrix3f
scaling(Vector2f factor, Vector2f center) {
466 factor.x, 0.0f, center.x * (1.0f - factor.x),
467 0.0f, factor.y, center.y * (1.0f - factor.y),
489 GF_API void scale(Matrix3f& mat, Vector2f factor, Vector2f center);
491 #ifndef DOXYGEN_SHOULD_SKIP_THIS constexpr Vector2f inverseTransform(const Translation &translation, Vector2f point)
Apply an inverse translation to a 2D point.
Definition: Transform.h:190
Rotation(float angle)
Constructor with an angle.
Definition: Transform.h:61
void scale(Matrix3f &mat, Vector2f factor)
Combine the current transform with a scaling.
void setOffset(Vector2f newOffset) noexcept
Set the translation offset.
Definition: Transform.h:154
float getAngle() const
Get the rotation angle.
Definition: Transform.h:82
constexpr Vector2f transform(const Matrix3f &mat, Vector2f point)
Apply an affine transformation to a 2D point.
Definition: Transform.h:331
Vector2f offset
The offset of the translation.
Definition: Transform.h:125
Matrix3f rotation(float angle, Vector2f center)
Get a rotation matrix.
Definition: Transform.h:410
Matrix3f scaling(Vector2f factor)
Get a scaling matrix.
Definition: Transform.h:447
constexpr Vector2f transform(const Rotation &rotation, Vector2f point)
Apply a rotation to a 2D point.
Definition: Transform.h:96
float sin
The sine of the rotation angle.
Definition: Transform.h:43
A translation.
Definition: Transform.h:124
Matrix3f scaling(Vector2f factor, Vector2f center)
Get a scaling matrix.
Definition: Transform.h:464
constexpr Vector2f transform(const Translation &translation, Vector2f point)
Apply a translation to a 2D point.
Definition: Transform.h:177
Translation()
Default constructor.
Definition: Transform.h:132
void scale(Matrix3f &mat, Vector2f factor, Vector2f center)
Combine the current transform with a scaling.
Vector2f getOffset() const noexcept
Get the translation offset.
Definition: Transform.h:163
Translation(Vector2f translationOffset)
Constructor with an offset.
Definition: Transform.h:143
The namespace for gf classes.
Definition: Action.h:34
Matrix3f rotation(float angle)
Get a rotation matrix.
Definition: Transform.h:391
void rotate(Matrix3f &mat, float angle)
Combine the current transform with a rotation.
Matrix3f translation(Vector2f offset)
Get a translation matrix.
Definition: Transform.h:366
void translate(Matrix3f &mat, Vector2f offset)
Combine the current transform with a translation.
RectF transform(const Matrix3f &mat, const RectF &rect)
Apply an affine transformaton to a rectangle.
constexpr Vector2f inverseTransform(const Rotation &rotation, Vector2f point)
Apply an inverse rotation to a 2D point.
Definition: Transform.h:112
void setAngle(float angle)
Set the rotation angle.
Definition: Transform.h:72
A rotation.
Definition: Transform.h:41
void rotate(Matrix3f &mat, float angle, Vector2f center)
Combine the current transform with a rotation.
Rotation()
Default constructor.
Definition: Transform.h:50
#define GF_API
Definition: Portability.h:35
constexpr Matrix3f identityTransform()
Identity transform.
Definition: Transform.h:354
float cos
The cosine of the rotation angle.
Definition: Transform.h:42