Canvas:rotate()

Canvas:rotate(angle, [centerx], [centery])method

Applyies a rotation transformation on the Canvas

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.

[centerx]

The horizontal coordinate for the rotation center point, defaulting to the center of the Canvas.

[centery]

The vertical coordinate for the rotation center point, defaulting to the center of the Canvas.

Return value

This function returns no value.

Example


--! luart-extensions
import ui
require "canvas"

local win = ui.Window("Canvas - Rotation example", "fixed", 320, 240)

local c = ui.Canvas(win)
c.align = "all"

local degree = 0
local width = c.width/2
local height = c.height/2

function c:onPaint()
  self:begin()
  self:clear()
  c:rotate(degree)
  c:fillrect(width-35, height-35, width+35, height+35, 0xA569BDFF)
  degree = degree + 0.0005
  sleep()
  self:flip()
end

await win:showasync()