Display:shift{}

Type	method of Display class	[gd]
Overview	Raise movement of display object	[bgl
Return value	self (display object itself)
See also	Display class

Overview 

This method makes a Display class object to shift target point with time

from current location. The parameter of this method is a single table.

Syntax

In the calling function in Lua language, if it receives only a single table,

the parenthesis can be omitted.

Therefore, there is no need to write parentheses.

For the single shift

obj:shift{time=n, x=n, y=n, rot = n, scale = n, alpha = n, scaleX = n, scaleY = n}

where n is a number.

For multiple and chained shifts,

obj:shift{     loops = n, --(optional)     onEnd = function, --(optional)     {time=n, x=n, y=n, rot = n, scale = n, alpha = n, scaleX = n, scaleY = n},     {time=n, x=n, y=n, rot = n, scale = n, alpha = n, scaleX = n, scaleY = n},     ....     {time=n, x=n, y=n, rot = n, scale = n, alpha = n, scaleX = n, scaleY = n}, }

        • loops : number of repetition (INF for infinite repetition)

        • onEnd: the function that is called when all the shifts are completed

Examples

 

(single shift)

local img = Image('moon.png') img:shift{time=500, x=0, y=0, scale = 2 }

(multiple and chained shifts)

local img = Image('moon.png') img:shift {     loops=3,     onEnd = function() print('finished') end,     {time = 1000, x=1080},     {time = 1000, y=1920},     {time = 1000, x=0, y=0, scale=0.5, alpha=0},     {time = 500, alpha=1}, }