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package org.ala.spatial.analysis.legend;

/**
 * generates legend with even interval cutoff's.
 *
 * @author Adam
 */
public class LegendEvenIntervalLog10 extends Legend {

    @Override
    public void generate(float[] d, int divisions) {
        init(d, divisions);
        if(Float.isNaN(max)) {
            return;
        }

        //prevent negative number assignment
        float offset = (min<1)?1 - min:0;
        float tmax = max + offset;
        float tmin = min + offset;
        double lmin = Math.log10(tmin);
        double lmax = Math.log10(tmax);
        double lrange = lmax - lmin;

        cutoffs = new float[divisions];

        for(int i=0;i<divisions;i++){
            cutoffs[i] = (float) Math.pow(10, lmin + lrange * ((i + 1) / (double) (divisions)))
                    - offset;
        }

        //fix max
        cutoffs[divisions - 1] = max;
    }

    @Override
    public String getTypeName() {
        return "Even Interval Log 10";
    }
}