Terrarum/src/net/torvald/terrarum/mapdrawer/MapCamera.kt

package net.torvald.terrarum.mapdrawer

import com.jme3.math.FastMath
import net.torvald.terrarum.Terrarum
import net.torvald.terrarum.gameworld.GameWorld

/**
 * Created by SKYHi14 on 2016-12-30.
 */
object MapCamera {
    private val world: GameWorld = Terrarum.ingame.world
    private val TILE_SIZE = FeaturesDrawer.TILE_SIZE

    var x = 0
        private set
    var y = 0
        private set
    var width: Int = 0
        private set
    var height: Int = 0
        private set

    fun update() {
        val player = Terrarum.ingame.player

        width = FastMath.ceil(Terrarum.WIDTH / Terrarum.ingame.screenZoom) // div, not mul
        height = FastMath.ceil(Terrarum.HEIGHT / Terrarum.ingame.screenZoom)

        // position - (WH / 2)
        x = Math.round(// X only: ROUNDWORLD implementation
                player.hitbox.centeredX.toFloat() - width / 2)
        y = Math.round(FastMath.clamp(
                player.hitbox.centeredY.toFloat() - height / 2,
                TILE_SIZE.toFloat(),
                world.height * TILE_SIZE - height - TILE_SIZE.toFloat()
        ))

    }
}