Matrix32

A 3x2 matrix for 2D. Note that it is column-major, for OpenGL.

Members

Constructors

• Matrix32
• Matrix32

Properties

• array
• m11
• m12
• m21
• m22
• m31
• m32

Methods

• set
• set
• set
• reset
• setTranslate
• setScale
• setRotate
• setSkewX
• setSkewY
• translate
• rotate
• rotate
• scale
• preScale
• skewX
• skewY
• transform
• multiply
• premultiply

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Matrix32

Constructor

Description

Constructor (identity matrix)

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Matrix32

Constructor

Arguments

Arguments	Type	Default	Description
m11	real	 	Value at [1][1].
m12	real	 	Value at [1][2].
m21	real	 	Value at [2][1].
m22	real	 	Value at [2][2].
m31	real	 	Value at [3][1].
m32	real	 	Value at [3][2].

Description

Constructor

Initializes the matrix with the given values.

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array

Property \ Access: r/w

Description

Gets the matrix as a one-dimensional array [r]

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m11

Property \ Access: r/w

Description

Value at [1][1] [r/w]

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m12

Property \ Access: r/w

Description

Value at [1][2] [r/w]

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m21

Property \ Access: r/w

Description

Value at [2][1] [r/w]

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m22

Property \ Access: r/w

Description

Value at [2][2] [r/w]

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m31

Property \ Access: r/w

Description

Value at [3][1] [r/w]

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m32

Property \ Access: r/w

Description

Value at [3][2] [r/w]

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set

Method

Arguments

Arguments	Type	Default	Description
m11	real	 	Value at [1][1].
m12	real	 	Value at [1][2].
m21	real	 	Value at [2][1].
m22	real	 	Value at [2][2].
m31	real	 	Value at [3][1].
m32	real	 	Value at [3][2].

Description

Sets the matrix

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set

Method

Arguments

Arguments	Type	Default	Description
array	Array	 	An array of 6 elements.

Description

Sets the matrix

Copies from a one-dimensional array.

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set

Method

Arguments

Arguments	Type	Default	Description
matrix	Matrix32	 	A Matrix32 instance.

Description

Sets the matrix

Copies from matrix.

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reset

Method

Description

Resets to the identity matrix

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setTranslate

Method

Arguments

Arguments	Type	Default	Description
x	real	 	X coordinate to set.
y	real	 	Y coordinate to set.

Description

Sets a translation matrix

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setScale

Method

Arguments

Arguments	Type	Default	Description
x	real	 	Scale factor along the X axis.
y	real	 	Scale factor along the Y axis.

Description

Sets a scaling matrix

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setRotate

Method

Arguments

Arguments	Type	Default	Description
degree	real	 	Rotation angle.

Description

Sets a rotation matrix

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setSkewX

Method

Arguments

Arguments	Type	Default	Description
degree	real	 	Skew angle.

Description

Sets an X-axis skew matrix

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setSkewY

Method

Arguments

Arguments	Type	Default	Description
degree	real	 	Skew angle.

Description

Sets a Y-axis skew matrix

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translate

Method

Arguments

Arguments	Type	Default	Description
x	real	 	Amount to move along X.
y	real	 	Amount to move along Y.

Description

Translates the matrix

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rotate

Method

Arguments

Arguments	Type	Default	Description
degree	real	 	Rotation angle.

Description

Rotates the matrix

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rotate

Method

Arguments

Arguments	Type	Default	Description
degree	real	 	Rotation angle.
px	real	 	Center point.
py	real	 	Center point.

Description

Rotates the matrix

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scale

Method

Arguments

Arguments	Type	Default	Description
x	real	 	Scale factor along X.
y	real	 	Scale factor along Y.

Description

Scales the matrix

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preScale

Method

Arguments

Arguments	Type	Default	Description
x	real	 	Scale factor along X.
y	real	 	Scale factor along Y.

Description

Scales the matrix (pre-scale)

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skewX

Method

Arguments

Arguments	Type	Default	Description
degree	real	 	Skew angle.

Description

Skews the matrix along the X axis

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skewY

Method

Arguments

Arguments	Type	Default	Description
degree	real	 	Skew angle.

Description

Skews the matrix along the Y axis

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transform

Method

Arguments

Arguments	Type	Default	Description
x	real	 	X coordinate.
y	real	 	Y coordinate.

Description

Transforms XY coordinates by this matrix

The input arguments are overwritten with the result.

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multiply

Method

Arguments

Arguments	Type	Default	Description
matrix	Matrix32	 	The matrix to multiply by.

Description

Multiplies by a matrix (this = this * matrix)

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premultiply

Method

Arguments

Arguments	Type	Default	Description
matrix	Matrix32	 	The matrix to multiply by.

Description

Multiplies by a matrix in the opposite order (this = matrix * this)

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