/**
 * 
 */
package cz.cuni.mff.peckam.java.origamist.modelstate;

import static cz.cuni.mff.peckam.java.origamist.math.MathHelper.EPSILON;

import javax.vecmath.Point2d;
import javax.vecmath.Point3d;

/**
 * A point on the model.
 * 
 * @author Martin Pecka
 */
public class ModelPoint extends Point3d implements Cloneable
{
    /** */
    private static final long serialVersionUID  = -2994355263756836249L;

    /** The point on the paper referenced by this point. */
    protected Point2d         original;

    /** The segment that contains this point. */
    protected ModelSegment    containingSegment = null;

    public ModelPoint(Point3d point, Point2d original)
    {
        this(point, original, null);
    }

    public ModelPoint(Point3d point, Point2d original, ModelSegment containingSegment)
    {
        super(point);
        this.original = original;
        this.containingSegment = containingSegment;
    }

    /**
     * @return The point on the paper referenced by this point.
     */
    public Point2d getOriginal()
    {
        return original;
    }

    /**
     * @param original The point on the paper referenced by this point.
     */
    public void setOriginal(Point2d original)
    {
        this.original = original;
    }

    /**
     * @return The segment that contains this point. This is an optional property.
     */
    public ModelSegment getContainingSegment()
    {
        return containingSegment;
    }

    /**
     * Return true if this point is almost equal to the given one.
     * 
     * @param point The point to compare.
     * @return true if this point is almost equal to the given one.
     */
    public boolean epsilonEquals(ModelPoint point)
    {
        return super.epsilonEquals(point, EPSILON) && original.epsilonEquals(point.original, EPSILON);
    }

    @Override
    public String toString()
    {
        return "ModelPoint [point=" + super.toString() + ", original=" + original + "]";
    }

    @Override
    public int hashCode()
    {
        final int prime = 31;
        int result = super.hashCode();
        result = prime * result + ((original == null) ? 0 : original.hashCode());
        return result;
    }

    @Override
    public boolean equals(Object obj)
    {
        if (this == obj)
            return true;
        if (!super.equals(obj))
            return false;
        if (getClass() != obj.getClass())
            return false;
        ModelPoint other = (ModelPoint) obj;
        if (original == null) {
            if (other.original != null)
                return false;
        } else if (!original.equals(other.original))
            return false;
        return true;
    }

    @Override
    public ModelPoint clone()
    {
        return new ModelPoint((Point3d) super.clone(), (Point2d) original.clone(), containingSegment == null ? null
                : containingSegment.clone());
    }
}