Change.log

Change log for 2D Transformation Matrix
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2.0

ADD: interpolateAnim() suitable for animation and is using decomposition
for interpolation rather than naive interpolation (which can make rotations
"flip" etc.).


1.9.3

ADD: toString(), toCSS(), toJSON(), toArray()


1.9.2

FIX: Speed improvements, trimmed code to reduce minify size.


1.9.1

FIX: Change in isValid() left boolean inverted.


1.9

ADD: scaleU()
ADD: optional context parameter for interpolate()
ADD: optional parameter for applyToTypedArray to use 64-bit float array
CHG: some optimizations, reduced size
FIX: divideScalar() did not update context if set
FIX: internal use of isInvertible in inverse() was handled as property
REM: getInverse() (use inverse() instead)


1.8

CHG: getInverse() -> inverse(). getInverse() will be removed in the future.
ADD: rotateFromVector(x, y)
ADD: decompose(lu|qr) (BETA) (L)
ADD: determinant()
ADD: divide(matrix)
ADD: divideScalar(n)
ADD: isInvertible()
ADD: Error check for inverse(), throws error if non-invertible

Thanks to github.com/leeoniya (L) for decompose() implementation
(with some additional changes)


1.7

ADD: reflectVector() (BETA: possible special cases, simple impl. for now)
ADD: concat() current instance onto supplied child matrix and return new
ADD: isValid() to check the state of the matrix
ADD: clone() current instance
IMP: getInverse() now checks if identity first and skips calculations if it is


1.6

CHG: IMPORTANT! All skew() methods renamed to shear() (L)
ADD: New skew() takes an angle in radians. (L)

Thanks to github.com/leeoniya (L) for these contributions


1.5

ADD: new method applyToTypedArray()
CHG: Code restructured to "minify" better (L)
FIX: applyToArray() (L)

Thanks to github.com/leeoniya (L) for these contributions


1.4

ADD: Made non-returning methods chain-able.


1.3

ADD: New method applyToContext().


1.2

ADD: Two new helper methods flipX() and flipY()
ADD: Two new helper methods skewX() and skewY()
ADD: Two new helper methods scaleX() and scaleY()
ADD: Two new helper methods translateX() and translateY()
ADD: Helper method rotateDeg() to rotate by degrees
ADD: New method isEqual() to compare current matrix with another matrix
CHG: getInverse() and interpolate() no longer apply parent's context to returned matrix
CHG: Epsilon tolerance for floating point equal checks
REM: Previous (partly experimental) added methods for add/subtract removed due to non-linear nature.


1.1

ADD: New method reset()
ADD: New method add() (obsoleted)
ADD: New method addMatrix() (obsoleted)
ADD: New method subtract() (obsoleted)
ADD: New method subtractMatrix() (obsoleted)
CHG: NOTE: Method applyToPoint() takes pair of x/y instead of point object
CHG: Method applyToArray() can now take two forms of arrays (point objects and point pair values)
FIX: If context is provided it will now be initialized to identity matrix to enable 100% sync
FIX: Some documentation errors


1.0

Initial release