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/*
 * Copyright (c) 2010-2021 Haifeng Li. All rights reserved.
 *
 * Smile 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 3 of the License, or
 * (at your option) any later version.
 *
 * Smile 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 Smile.  If not, see .
 */

package smile.plot.swing;

import java.awt.Color;
import smile.math.MathEx;

/**
 * A wire frame model specifies each edge of the physical object where two
 * mathematically continuous smooth surfaces meet, or by connecting an
 * object's constituent vertices using straight lines or curves.
 *
 * @author Haifeng Li
 */
public class Wireframe extends Plot {

    /**
     * The coordinates of vertices in the wire frame.
     */
    final double[][] vertices;
    /**
     * The vertex indices of two end points of each edge in the wire frame.
     */
    final int[][] edges;

    /**
     * Constructor.
     * @param vertices a n-by-2 or n-by-3 array which are coordinates of n vertices.
     * @param edges an m-by-2 array of which each row is the vertex indices of two
     * end points of each edge.
     */
    public Wireframe(double[][] vertices, int[][] edges, Color color) {
        super(color);
        this.vertices = vertices;
        this.edges = edges;
    }

    @Override
    public double[] getLowerBound() {
        return MathEx.colMin(vertices);
    }

    @Override
    public double[] getUpperBound() {
        return MathEx.colMax(vertices);
    }

    @Override
    public void paint(Graphics g) {
        g.setColor(color);

        for (int[] edge : edges) {
            g.drawLine(vertices[edge[0]], vertices[edge[1]]);
        }
    }

    /**
     * Constructor.
     * @param vertices a n-by-2 or n-by-3 array which are coordinates of n vertices.
     * @param edges an m-by-2 array of which each row is the vertex indices of two
     * end points of each edge.
     */
    public static Wireframe of(double[][] vertices, int[][] edges) {
        return new Wireframe(vertices, edges, Color.BLACK);
    }
}