Forked from:: Saqoosha's forked from: Saqoosha challenge for amateurs

forked from: forked from: Saqoosha challenge for amateurs

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license : MIT License
modified : 2009-11-27 12:09:19

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// forked from Saqoosha's forked from: Saqoosha challenge for amateurs
// forked from checkmate's Saqoosha challenge for amateurs
package {
    
    import flash.display.Sprite;
    import org.libspark.betweenas3.easing.Circ;
    
    [SWF(width=465, height=465, backgroundColor=0xffffff, frameRate=120)]

public class GradationTest1 extends Sprite {
        
        public function GradationTest1() {
            // Gradationクラスを作る。任意の数のカラー値を渡すことができる。
            var grad:Gradation = new Gradation(0xFFFFFF, 0xFFF200, 0xFF34D7, 0x9524CC, 0x1178D9);
            grad.setEasing(Circ.easeInOut);
            for (var y:int = 0; y < 465; y++) {
                // getColorでグラデーションを構成する中間色を取り出す。渡す値は0〜1。滑らかにこの値を変化させることでグラデーションを作り出す。
                graphics.beginFill(grad.getColor(y / 464));
                graphics.drawRect(0, y, 465, 1);
                graphics.endFill();
            }
        }
    }
}

import frocessing.color.ColorLerp;

import org.libspark.betweenas3.core.easing.IEasing;
import org.libspark.betweenas3.easing.Linear;

class Gradation {
    
    private var _colors:Array;
    private var _easing:IEasing;
    
    public function Gradation(...args) {
        _colors = args.concat();
        _easing = Linear.linear;
    }
    
    public function setEasing(easing:IEasing):void {
        _easing = easing;
    }
    
    public function getColor(position:Number):uint {
        position = (position < 0 ? 0 : position > 1 ? 1 : position) * (_colors.length - 1);
        var idx:int = position;
        var alpha:Number = _easing.calculate(position - idx, 0, 1, 1);
        if (alpha == 0) {
            return _colors[idx];
        } else {
            return ColorLerp.lerp(_colors[idx], _colors[idx + 1], alpha);
        }
    }
}

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