Terrarum/src/net/torvald/terrarum/ui/UIUtils.kt

package net.torvald.terrarum.ui

import net.torvald.terrarum.sqr

/**
 * Created by minjaesong on 2017-03-14.
 */
object UIUtils {
    fun moveQuick(start: Float, end: Float, timer: Float, duration: Float) =
            (start - end) * ((timer / duration) - 1).sqr() + end
    fun moveLinear(start: Float, end: Float, timer: Float, duration: Float): Float {
        val scale = timer / duration
        if (start == end) {
            return start
        }
        if (scale <= 0f) {
            return start
        }
        if (scale >= 1f) {
            return end
        }
        return ((1f - scale) * start) + (scale * end)
    }
}