public final class Rotation2D extends Object implements EuclideanTransform<Vector2D>
| Modifier and Type | Method and Description |
|---|---|
Vector2D |
apply(Vector2D pt) |
Vector2D |
applyVector(Vector2D vec)
Apply this transform to the given vector, ignoring translations.
|
static Rotation2D |
createVectorRotation(Vector2D u,
Vector2D v)
Create a rotation instance that rotates the vector
u to point in the direction of
vector v. |
boolean |
equals(Object obj) |
double |
getAngle()
Get the angle of rotation in radians.
|
int |
hashCode() |
static Rotation2D |
identity()
Return an instance representing the identity rotation, ie a rotation
of zero radians.
|
Rotation2D |
inverse() |
static Rotation2D |
of(double angle)
Create a new instance with the given angle of rotation.
|
boolean |
preservesOrientation() |
AffineTransformMatrix2D |
toMatrix()
Return an
AffineTransformMatrix2D representing the same rotation
as this instance. |
String |
toString() |
public double getAngle()
public Rotation2D inverse()
public boolean preservesOrientation()
This method simply returns true since rotations always preserve the orientation of the space.
preservesOrientation in interface Transform<Vector2D>public Vector2D applyVector(Vector2D vec)
This method can be used to transform vector instances representing displacements between points.
For example, if v represents the difference between points p1 and p2,
then transform.applyVector(v) will represent the difference between p1 and p2
after transform is applied.
This method simply calls apply(vec) since rotations treat
points and vectors similarly.
applyVector in interface EuclideanTransform<Vector2D>vec - the vector to transformpublic AffineTransformMatrix2D toMatrix()
AffineTransformMatrix2D representing the same rotation
as this instance.public static Rotation2D of(double angle)
angle - the angle of rotation in radianspublic static Rotation2D identity()
public static Rotation2D createVectorRotation(Vector2D u, Vector2D v)
u to point in the direction of
vector v.u - input vectorv - target vectoru to point in the direction of vIllegalArgumentException - if either vector cannot be normalizedCopyright © 2016–2021 The Apache Software Foundation. All rights reserved.