/*! ******************************************************************************
*
* Pentaho Data Integration
*
* Copyright (C) 2002-2016 by Pentaho : http://www.pentaho.com
*
*******************************************************************************
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
******************************************************************************/
package org.pentaho.gis.shapefiles;
/*
* Created on 07-juli-04
*
* @author Matt
*
*/
public class ShapePolygon extends Shape implements ShapeInterface {
public int nrparts;
public int nrpoints;
public int nrmeasures;
public double box_minx, box_miny, box_maxx, box_maxy;
public int[] part_starts;
public ShapePoint[] point;
/*
Byte
Position Field Value Type Number Order
-------------------------------------------------------------------
Byte 0 Shape Type 23 Integer 1 Little
Byte 4 Box Box Double 4 Little
Byte 36 NumParts NumParts Integer 1 Little
Byte 40 NumPoints NumPoints Integer 1 Little
Byte 44 Parts Parts Integer NumParts Little
Byte X Points Points Point NumPoints Little
Note: X = 44 + (4 * NumParts)
*/
public ShapePolygon( byte[] content ) {
super( Shape.SHAPE_TYPE_POLYGON );
int pos;
box_minx = Converter.getDoubleLittle( content, 4 );
box_miny = Converter.getDoubleLittle( content, 12 );
box_maxx = Converter.getDoubleLittle( content, 20 );
box_maxy = Converter.getDoubleLittle( content, 28 );
nrparts = Converter.getIntegerLittle( content, 36 );
nrpoints = Converter.getIntegerLittle( content, 40 );
// int pos_parts = 44;
// int pos_points = pos_parts + (nrparts*4);
// int pos_mmin = pos_points + (16*nrpoints);
// int pos_mmax = pos_mmin + 8;
// int pos_marray = pos_mmax + 16;
// int tot_length = pos_marray + (8*nrpoints);
//System.out.println("\n\nlength="+content.length+", nrparts="+nrparts+", nrpoints="+nrpoints+", pos_marray="+pos_marray+", totlen="+tot_length);
part_starts = new int[nrparts];
point = new ShapePoint[nrpoints];
// Determine the starting point for the parts...
for ( int i = 0; i < nrparts; i++ ) {
pos = 44 + i * 4;
part_starts[i] = Converter.getIntegerLittle( content, pos );
}
for ( int i = 0; i < nrpoints; i++ ) {
pos = ( 44 + nrparts * 4 ) + ( 16 * i );
double pointx = Converter.getDoubleLittle( content, pos );
double pointy = Converter.getDoubleLittle( content, pos + 8 );
point[i] = new ShapePoint( pointx, pointy );
}
}
public boolean contains( ShapePoint p ) {
for ( int i = 0; i < nrpoints; i++ ) {
if ( p.equals( point[i] ) ) {
return true;
}
}
return false;
}
}