public class DiscreteTransform2 extends Object
Rotations are performed around tile centers unless the tile corner flags are set to true. To prevent aliasing, quarter turn rotations are only legal on block centers or corners. Half turns can be performed additionally on line centers.
Modifier and Type  Field and Description 

static DiscreteTransform2 
IDENTITY
Represents an identity transformation.

Modifier and Type  Method and Description 

DiscreteTransform2 
andThen(DiscreteTransform2 that)
Returns a transform that is the composition of the given transform with
this transform.

DiscreteTransform2 
compose(DiscreteTransform2 that)
Returns a transform that is the composition of this transform and the
given transform.

static DiscreteTransform2 
fromRotation(int quarterTurns)
Returns a new transform representing a rotation in the xy plane around
the origin.

static DiscreteTransform2 
fromRotation(int quarterTurns,
Vector2i point,
boolean tileCorner)
Returns a new transform representing a rotation in the xy plane, around a
given point.

static DiscreteTransform2 
fromRotation(int halfTurns,
Vector2i point,
boolean tileCornerX,
boolean tileCornerY)
Returns a new transform representing a rotation in the xy plane, around a
given point.

static DiscreteTransform2 
fromScale(int a)
Returns a new transform representing a scaling.

static DiscreteTransform2 
fromScale(int x,
int y)
Returns a new transform representing a scaling on each axis.

static DiscreteTransform2 
fromScale(Vector2i vector)
Returns a new transform representing a scaling on each axis.

static DiscreteTransform2 
fromTranslation(int x,
int y)
Returns a new transform representing a translation.

static DiscreteTransform2 
fromTranslation(Vector2i vector)
Returns a new transform representing a translation.

Matrix3d 
getMatrix()
Returns the matrix representation of the transform.

DiscreteTransform2 
invert()
Inverts the transform and returns it as a new transform.

static Optional<DiscreteTransform2> 
of(Matrix3d matrix)
Returns a new transform from the given transformation matrix, if the
resulting transform would be discrete.

static DiscreteTransform2 
rotationAroundCenter(int quarterTurns,
Vector2i size)
Returns a new transform representing a centered rotation of an area of
tiles.

Vector2i 
transform(int x,
int y)
Transform a vector represented as a pair of coordinates using this
transform.

Vector2i 
transform(Vector2i vector)
Transforms a vector using this transforms.

int 
transformX(int x,
int y)
Transforms the x coordinate of a vector using this transform.

int 
transformX(Vector2i vector)
Transforms the x coordinate of a vector using this transform.

int 
transformY(int x,
int y)
Transforms the y coordinate of a vector using this transform.

int 
transformY(Vector2i vector)
Transforms the y coordinate of a vector using this transform.

DiscreteTransform2 
withRotation(int quarterTurns)
Adds a rotation to this transform, in the xy plane, around the origin and
returns it as a new transform.

DiscreteTransform2 
withRotation(int quarterTurns,
Vector2i point,
boolean tileCorner)
Adds a a rotation to this transform, in the xy plane, around a given
point, and returns it as a new transform.

DiscreteTransform2 
withRotation(int halfTurns,
Vector2i point,
boolean tileCornerX,
boolean tileCornerY)
Adds a a rotation to this transform, in the xy plane, around a given
point, and returns it as a new transform.

DiscreteTransform2 
withScale(int a)
Adds a scale factor to this transform and returns it as a new transform.

DiscreteTransform2 
withScale(int x,
int y)
Adds a scale factor for each axis to this transform and returns it as a
new transform.

DiscreteTransform2 
withScale(Vector2i vector)
Adds a scale factor for each axis to this transform and returns it as a
new transform.

DiscreteTransform2 
withTransformation(DiscreteTransform2 transform)
Adds another transformation to this transformation and returns int as a
new transform.

DiscreteTransform2 
withTranslation(int x,
int y)
Adds a translation to this transform and returns it as a new transform.

DiscreteTransform2 
withTranslation(Vector2i vector)
Adds a translation to this transform and returns it as a new transform.

public static final DiscreteTransform2 IDENTITY
public Matrix3d getMatrix()
public Vector2i transform(Vector2i vector)
vector
 The original vectorpublic Vector2i transform(int x, int y)
x
 The x coordinate of the original vectory
 The y coordinate of the original vectorpublic int transformX(Vector2i vector)
vector
 The original vectorpublic int transformX(int x, int y)
x
 The x coordinate of the original vectory
 The y coordinate of the original vectorpublic int transformY(Vector2i vector)
vector
 The original vectorpublic int transformY(int x, int y)
x
 The x coordinate of the original vectory
 The y coordinate of the original vectorpublic DiscreteTransform2 invert()
public DiscreteTransform2 compose(DiscreteTransform2 that)
that
 The transform to compose withpublic DiscreteTransform2 andThen(DiscreteTransform2 that)
that
 The transform to compose withpublic DiscreteTransform2 withTranslation(Vector2i vector)
vector
 The translation vectorpublic DiscreteTransform2 withTranslation(int x, int y)
x
 The x coordinate of the translationy
 The y coordinate of the translationpublic DiscreteTransform2 withScale(int a)
a
 The scale factorpublic DiscreteTransform2 withScale(Vector2i vector)
vector
 The scale vectorpublic DiscreteTransform2 withScale(int x, int y)
x
 The scale factor on xy
 The scale factor on ypublic DiscreteTransform2 withRotation(int quarterTurns)
quarterTurns * 90
. The rotation is around
the block center, not the corner.quarterTurns
 The number of quarter turns in this rotationpublic DiscreteTransform2 withRotation(int quarterTurns, Vector2i point, boolean tileCorner)
quarterTurns * 90
. The tile
corner flag changes the point to be the tile upper corner instead of the
center.quarterTurns
 The number of quarter turns in this rotationpoint
 The point of rotation, as tile coordinatestileCorner
 Whether or not to use the corner of the tile instead of
the centerpublic DiscreteTransform2 withRotation(int halfTurns, Vector2i point, boolean tileCornerX, boolean tileCornerY)
halfTurns * 180
. The tile corner
flags change the point to be the tile corner or edge instead of the
center. When both flags are false, the center is used. When only one is
true the edge on the opposite axis to the flag is used. When both are
true the upper corner is used.halfTurns
 The number of half turns in this rotationpoint
 The point of rotation, as tile coordinatestileCornerX
 Whether or not to use the corner of the tile instead
of the center on the x axistileCornerY
 Whether or not to use the corner of the tile instead
of the center on the y axispublic DiscreteTransform2 withTransformation(DiscreteTransform2 transform)
transform
 The transformation to addpublic static Optional<DiscreteTransform2> of(Matrix3d matrix)
matrix
 The matrix to use for the transformOptional.empty()
public static DiscreteTransform2 fromTranslation(Vector2i vector)
vector
 The translation vectorpublic static DiscreteTransform2 fromTranslation(int x, int y)
x
 The x coordinate of the translationy
 The y coordinate of the translationpublic static DiscreteTransform2 fromScale(int a)
a
 The scale factorpublic static DiscreteTransform2 fromScale(Vector2i vector)
vector
 The scale vectorpublic static DiscreteTransform2 fromScale(int x, int y)
x
 The scale factor on xy
 The scale factor on ypublic static DiscreteTransform2 fromRotation(int quarterTurns)
quarterTurns * 90
. The rotation is around the block center,
not the corner.quarterTurns
 The number of quarter turns in this rotationpublic static DiscreteTransform2 fromRotation(int quarterTurns, Vector2i point, boolean tileCorner)
quarterTurns * 90
. The tile corner flag change the point to be
the tile corner instead of the center.quarterTurns
 The number of quarter turns in this rotationpoint
 The point of rotation, as tile coordinatestileCorner
 Whether or not to use the corner of the tile instead of
the centerpublic static DiscreteTransform2 fromRotation(int halfTurns, Vector2i point, boolean tileCornerX, boolean tileCornerY)
halfTurns * 180
. The tile corner flags change the point to be the
tile corner or edge instead of the center. When both flags are false, the
center is used. When only one is true the edge on the opposite axis to
the flag is used. When both are true the upper corner is used.halfTurns
 The number of half turns in this rotationpoint
 The point of rotation, as tile coordinatestileCornerX
 Whether or not to use the corner of the tile instead
of the center on the x axistileCornerY
 Whether or not to use the corner of the tile instead
of the center on the y axispublic static DiscreteTransform2 rotationAroundCenter(int quarterTurns, Vector2i size)
quarterTurns * 90
. Areas with differing parities on the axes can
only be rotated by multiples of 180 degrees.quarterTurns
 The amount of quarter turns in this rotationsize
 The size of the area to rotate