Why Image() moved on screen, jump to default position , every click on screen , and start moving from default position? - animation

Question

I have simple demo project. Image moved along screen follow mouse point.
LibGDX Image instance jump to default x coordinate along x axis, determined inside MainMenuScreen.kt show method, every time i click on screen, and start from default position moving. But i expect Image will continue/start new moving from last position before click on screen. How fix it, and what problem?
Code is simple and short, and i can't understand what can be wrong.
pastebin link to full project code:
https://pastebin.com/4UQDjSWa
github link to project:
https://github.com/3dformortals/demo-libgdx/tree/master/DemoMovingImageOnScreen
full project code:
//-------
//KDA.kt
//-------
package com.kda
import com.badlogic.gdx.Game
import com.badlogic.gdx.Gdx
import com.badlogic.gdx.graphics.GL20
import gui.AnimationSkin as AniSkin
class KDA : Game() {
internal var screenWidth:Float = 0.0f
internal var screenHeight:Float = 0.0f
internal val aniskin:AniSkin = AniSkin() //incuded human.atlas TextureAtlas for animation
override fun create() {
screenWidth = Gdx.graphics.width.toFloat()
screenHeight = Gdx.graphics.height.toFloat()
aniskin.prepare() //call preparing method for connect human.atlas for later using for animation
}
override fun render() {
Gdx.gl.glClearColor(1f, 0f, 0f, 1f)
Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT)
if (Gdx.input.justTouched()){
setScreen(MainMenuScreen(this))
}
super.render()
}
}
//-------------------
//AnimationSkin.kt
//-------------------
package gui
import com.badlogic.gdx.Gdx
import com.badlogic.gdx.graphics.g2d.TextureAtlas
import com.badlogic.gdx.scenes.scene2d.ui.Skin
class AnimationSkin : Skin() {
fun prepare(){
addRegions(TextureAtlas(Gdx.files.internal("animation/human.atlas")))
}
}
//----------------------
//MainMenuScreen.kt
//----------------------
package com.kda
import animated.ImageMoving
import com.badlogic.gdx.Gdx
import com.badlogic.gdx.ScreenAdapter
import com.badlogic.gdx.graphics.GL20
import com.badlogic.gdx.scenes.scene2d.Stage
import com.badlogic.gdx.utils.viewport.FitViewport
class MainMenuScreen(private val game: KDA) : ScreenAdapter() {
private val stage: Stage = Stage(FitViewport(game.screenWidth, game.screenHeight))
private val player = ImageMoving(game)
private val sprite = player.viewBox()
override fun show() {
Gdx.input.inputProcessor = stage
stage.isDebugAll = true //turn on frames around objects
sprite.x = 500f
//------------------------------------------------------------------------------------
//later, every mouse click on screen sprite jump to x500 position, and i can't fix it
//if i don't execute `sprite.x = 500f` , then sprite jump to x0 position, every click on screen
//--------------------------------------------------------------------------------------------
stage.addActor(sprite)
}
override fun resize(width: Int, height: Int) {
stage.viewport.update(width, height, true)
}
override fun render(delta: Float) {
super.render(delta)
Gdx.gl.glClearColor(0f, 0.5f, 0.5f, 1f)
Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT)
if(Gdx.input.justTouched()) println("before calculateAction box.x= "+sprite.x.toString()) //500 always
player.calculateAction(delta) //call player method for calculation moving on screen
println(sprite.x) //print normal as expected
stage.act(delta)
stage.draw()
}
}
//-----------------
//ImageMoving.kt
//-----------------
package animated
import com.badlogic.gdx.Gdx
import com.badlogic.gdx.scenes.scene2d.ui.Image
import com.kda.KDA
class ImageMoving(game: KDA) {
fun viewBox() = img
private val img = Image(game.aniskin.getDrawable("move-skin-male-back-R-0"))
fun calculateAction(delta:Float){
if (img.x > Gdx.input.x) img.x-=(100*delta).toInt().toFloat()
else if (img.x < Gdx.input.x) img.x+=(100*delta).toInt().toFloat()
}
}
//----------------------
//DesktopLauncher.kt
//---------------------
package com.kda.desktop
import com.badlogic.gdx.backends.lwjgl.LwjglApplication
import com.badlogic.gdx.backends.lwjgl.LwjglApplicationConfiguration
import com.kda.KDA
object DesktopLauncher {
#JvmStatic
fun main(arg: Array<String>) {
val config = LwjglApplicationConfiguration()
config.height = 720
config.width = 1280
LwjglApplication(KDA(), config)
}
}
gif animation demo of jumping image to default position x=500 after clicking on screen