Matrix

Supported platforms: android, ios, mac, pc
Available since: Gideros 2011.6

Description

The Matrix class specifies transformation from one coordinate space to another.
These transformations include translation, rotation, scaling and skewing.

A 2D transformation matrix is a 3 x 3 matrix in homogenous coordinate system:

![images/matrix_props.png]

You can get and set the values of all six of the properties in a
Matrix object: m11, m12, m21, m22, tx, and ty.

Since Gideros 2016.6, Matrix can also hold 3D (4x4) matrices.

Examples

Applying matrix to Sprite objects

local angle = math.rad(30)
-- create skew matrix
local m = Matrix.new(1, math.tan(angle), math.tan(angle), 1, 0, 0)
--aply to Sprite
local sprite = Sprite.new()
sprite:setMatrix(m)

Methods Matrix.new creates a new Matrix object Matrix:getAnchorPosition get anchor position from matrix transformation Matrix:getElements returns the elements of this matrix instance Matrix:getM11 returns the value of the m11 component Matrix:getM12 returns the value of the m12 component Matrix:getM21 returns the value of the m21 component Matrix:getM22 returns the value of the m22 component Matrix:getMatrix get all 16 elements of 4x4 matrix Matrix:getPosition get position from matrix transformation Matrix:getRotationX get rotation for x axis Matrix:getRotationY get rotation on y axis Matrix:getRotationZ get rotation for z axis Matrix:getScale get scale from matrix transformation Matrix:getScaleX get scale on x axis Matrix:getScaleY get scale on y axis Matrix:getScaleZ get scale on z axis Matrix:getTx returns the value of the tx component Matrix:getTy returns the value of the ty component Matrix:getTz returns the value of the tz component Matrix:getX get x position Matrix:getY get y position Matrix:getZ get z position Matrix:invert Matrix:multiply Multiply current matrix with new one Matrix:orthographicProjection Matrix:perspectiveProjection Matrix:perspectiveProjection Matrix:rotate combine existing rotation with provided Matrix:scale combine existing scale with provided scale Matrix:setAnchorPosition transform matrix for setting anchor position Matrix:setElements sets all 6 elements of this matrix instance Matrix:setM11 sets the value of the m11 component Matrix:setM12 sets the value of the m22 component Matrix:setM21 Matrix:setM22 Matrix:setMatrix set all 16 elements of 4x4 matrix Matrix:setPosition transform matrix for setting position Matrix:setRotationX set rotation on x axis Matrix:setRotationY set rotation on y axis Matrix:setRotationZ set rotation on z axis Matrix:setScale transform matrix for setting scale Matrix:setScaleX set scale on x axis Matrix:setScaleY set scale on y axis Matrix:setScaleZ set scale on z axis Matrix:setTx sets the value of the tx component Matrix:setTy sets the value of the ty component Matrix:setTz sets the value of the tz component Matrix:setX set x position Matrix:setY set y position Matrix:setZ set z position Matrix:transformPoint Matrix:translate combine existing translation with provided translation

Events Constants