de.myreality.acidsnake.util.ColorFader.java Source code

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Here is the source code for de.myreality.acidsnake.util.ColorFader.java

Source

/* Acid - Provides a Java cell API to display fancy cell boxes.
 * Copyright (C) 2013  Miguel Gonzalez
 * 
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
 */

package de.myreality.acidsnake.util;

import com.badlogic.gdx.graphics.Color;

/**
 * Class which fades between two colors
 * 
 * @author Miguel Gonzalez <miguel-gonzalez@gmx.de>
 * @since 
 * @version 
 */
public class ColorFader {

    // ===========================================================
    // Constants
    // ===========================================================

    // ===========================================================
    // Fields
    // ===========================================================

    private float srcR, srcG, srcB, dstR, dstG, dstB;

    private double ratio;

    private Color color;

    // ===========================================================
    // Constructors
    // ===========================================================

    public ColorFader(float srcR, float srcG, float srcB, float dstR, float dstG, float dstB) {
        super();
        this.srcR = srcR;
        this.srcG = srcG;
        this.srcB = srcB;
        this.dstR = dstR;
        this.dstG = dstG;
        this.dstB = dstB;
        color = new Color();
    }

    // ===========================================================
    // Getters and Setters
    // ===========================================================

    public void setRatio(double ratio) {
        this.ratio = ratio;
        ratio = Math.min(this.ratio, 1.0);
        ratio = Math.max(this.ratio, 0.0);

    }

    public Color getColor() {

        blend(srcR, srcG, srcB, dstR, dstG, dstB, ratio);

        return color;
    }

    // ===========================================================
    // Methods from Superclass
    // ===========================================================

    // ===========================================================
    // Methods
    // ===========================================================

    private void blend(float r1, float g1, float b1, float r2, float g2, float b2, double ratio) {
        double r = ratio;
        double ir = 1.0 - r;
        color.r = (float) (r1 * r + r2 * ir);
        color.g = (float) (g1 * r + g2 * ir);
        color.b = (float) (b1 * r + b2 * ir);
    }

    // ===========================================================
    // Inner classes
    // ===========================================================
}