Canvas:rotate(angle, [ x, y] ) method
Applyies a rotation transformation on the Canvas
rotate(), translate()...) must be the opposite of the order of the desired transformation.Parameters
angle
A number representing the rotation angle in degrees. A positive angle creates a clockwise rotation, and a negative angle creates a counterclockwise rotation.
[x, y]
Two numbers representing the coordinates for the rotation center point, defaulting to the center of the Canvas.
Return value
This function returns no value.Example
local ui = require "ui"
require "canvas"
local win = ui.Window("Canvas - Rotation example", "fixed", 320, 240)
local c = ui.Canvas(win)
c.align = "all"
local degree = 0
-- Uses internal timer for 30fps drawing
function c:onPaint()
self:clear(0xffffffff)
c:rotate(degree)
c:rect(50,50,100,100)
degree = degree + 2
end
ui.run(win)