PolygonPath.java

/*
 *  Copyright (C) 2014  Alfons Wirtz  
 *   website www.freerouting.net
 *
 *   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 3 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 at <http://www.gnu.org/licenses/> 
 *   for more details.
 *
 * Path.java
 *
 * Created on 24. Mai 2004, 08:10
 */

package designformats.specctra;

import geometry.planar.FloatPoint;
import geometry.planar.IntPoint;
import geometry.planar.IntOctagon;
import datastructures.IndentFileWriter;
import datastructures.IdentifierType;


/**
 * Class for reading and writing path scopes consisting of a polygon from dsn-files.
 *
 * @author  Alfons Wirtz
 */
public class PolygonPath extends Path
{
    
    /** Creates a new instance of PolygonPath */
    public PolygonPath(Layer p_layer, double p_width, double[] p_coordinate_arr)
    {
        super(p_layer, p_width, p_coordinate_arr);
    }
    
    
    /**
     * Writes this path as a scope to an output dsn-file.
     */
    public void write_scope(IndentFileWriter p_file, IdentifierType p_identifier_type) throws java.io.IOException
    {
        p_file.start_scope();
        p_file.write("path ");
        p_identifier_type.write(this.layer.name, p_file);
        p_file.write(" ");
        p_file.write((new Double(this.width)).toString());
        int corner_count = coordinate_arr.length/ 2;
        for (int i = 0; i < corner_count; ++i)
        {
            p_file.new_line();
            p_file.write(new Double(coordinate_arr[2 * i]).toString());
            p_file.write(" ");
            p_file.write(new Double(coordinate_arr[2 * i + 1]).toString());
        }
        p_file.end_scope();
    }
    
    public void write_scope_int(IndentFileWriter p_file, IdentifierType p_identifier_type) throws java.io.IOException
    {
        p_file.start_scope();
        p_file.write("path ");
        p_identifier_type.write(this.layer.name, p_file);
        p_file.write(" ");
        p_file.write((new Double(this.width)).toString());
        int corner_count = coordinate_arr.length/ 2;
        for (int i = 0; i < corner_count; ++i)
        {
            p_file.new_line();
            Integer curr_coor = (int) Math.round(coordinate_arr[2* i ]);
            p_file.write(curr_coor.toString());
            p_file.write(" ");
            curr_coor = (int) Math.round(coordinate_arr[2* i + 1]);
            p_file.write(curr_coor.toString());
        }
        p_file.end_scope();
    }
    
    public geometry.planar.Shape transform_to_board(CoordinateTransform p_coordinate_transform)
    {
        FloatPoint [] corner_arr = new FloatPoint[this.coordinate_arr.length / 2];
        double [] curr_point = new double [2];
        for (int i = 0; i < corner_arr.length; ++i)
        {
            curr_point[0] = this.coordinate_arr[2 * i];
            curr_point[1] = this.coordinate_arr[2 * i + 1];
            corner_arr[i] =  p_coordinate_transform.dsn_to_board(curr_point);
        }
        double offset = p_coordinate_transform.dsn_to_board(this.width) / 2;
        if (corner_arr.length <= 2)
        {
            IntOctagon bounding_oct = FloatPoint.bounding_octagon(corner_arr);
            return bounding_oct.enlarge(offset);
        }
        IntPoint [] rounded_corner_arr = new IntPoint[corner_arr.length];
        for (int i = 0; i < corner_arr.length; ++i)
        {
            rounded_corner_arr[i] = corner_arr[i].round();
        }
        geometry.planar.Shape result = new geometry.planar.PolygonShape(rounded_corner_arr);
        if (offset > 0)
        {
            result = result.bounding_tile().enlarge(offset);
        }
        return result;
    }
    
    public geometry.planar.Shape transform_to_board_rel(CoordinateTransform p_coordinate_transform)
    {
        FloatPoint [] corner_arr = new FloatPoint[this.coordinate_arr.length / 2];
        double [] curr_point = new double [2];
        for (int i = 0; i < corner_arr.length; ++i)
        {
            curr_point[0] = this.coordinate_arr[2 * i];
            curr_point[1] = this.coordinate_arr[2 * i + 1];
            corner_arr[i] =  p_coordinate_transform.dsn_to_board_rel(curr_point);
        }
        double offset = p_coordinate_transform.dsn_to_board(this.width) / 2;
        if (corner_arr.length <= 2)
        {
            IntOctagon bounding_oct = FloatPoint.bounding_octagon(corner_arr);
            return bounding_oct.enlarge(offset);
        }
        IntPoint [] rounded_corner_arr = new IntPoint[corner_arr.length];
        for (int i = 0; i < corner_arr.length; ++i)
        {
            rounded_corner_arr[i] = corner_arr[i].round();
        }
        geometry.planar.Shape result = new geometry.planar.PolygonShape(rounded_corner_arr);
        if (offset > 0)
        {
            result = result.bounding_tile().enlarge(offset);
        }
        return result;
    }
    
    public Rectangle bounding_box()
    {
        double offset = this.width/2;
        double[]  bounds = new double[4];
        bounds[0] = Integer.MAX_VALUE;
        bounds[1] = Integer.MAX_VALUE;
        bounds[2] = Integer.MIN_VALUE;
        bounds[3] = Integer.MIN_VALUE;
        for (int i = 0; i < coordinate_arr.length; ++i)
        {
            if (i % 2 == 0)
            {
                // x coordinate
                bounds[0] = Math.min(bounds[0], coordinate_arr[i] - offset);
                bounds[2] = Math.max(bounds[2], coordinate_arr[i]) + offset;
            }
            else
            {
                // x coordinate
                bounds[1] = Math.min(bounds[1], coordinate_arr[i] - offset);
                bounds[3] = Math.max(bounds[3], coordinate_arr[i] + offset);
            }
        }
        return new Rectangle(layer, bounds);
    }
}