yscale.java

这是一个十分有用的java图形工具包

package net.turbochen.graph;

/**
 * @author Turbo Chen
 */
public class YScale extends Scale
{
    
    public YScale(double min,double max)
    {
        this.min = min;
        this.max = max;
    }
    
    /* (non-Javadoc)
     * @see net.turbochen.graph.Scale#getScreenCoordinate(double)
     */
    public int getScreenCoordinate(double value)
    {
        double vrange = max - min;
        if(min < 0.0 && max < 0.0)
            vrange = (min - max) * -1.0;
        int irange = screenMin - screenMax;
        irange = (int)(((value - min ) * (double)irange) / vrange);
        return (screenMin - screenMax - irange) + screenMax;
    }



}