org.jgrasstools.gears.io.dxfdwg.libs.dwg.objects.DwgLwPolyline Maven / Gradle / Ivy
The newest version!
/*
* JGrass - Free Open Source Java GIS http://www.jgrass.org
* (C) HydroloGIS - www.hydrologis.com
*
* This library is free software; you can redistribute it and/or modify it under
* the terms of the GNU Library General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option) any
* later version.
*
* This library 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 Library General Public License for more
* details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; if not, write to the Free Foundation, Inc., 59
* Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package org.jgrasstools.gears.io.dxfdwg.libs.dwg.objects;
import java.awt.geom.Point2D;
import java.util.Vector;
import org.jgrasstools.gears.io.dxfdwg.libs.dwg.DwgObject;
import org.jgrasstools.gears.io.dxfdwg.libs.dwg.DwgUtil;
/**
* The DwgLwPolyline class represents a DWG LwPolyline
*
* @author jmorell
*/
public class DwgLwPolyline extends DwgObject {
private int flag;
private double constWidth;
private double elevation;
private double thickness;
private double[] normal;
private Point2D[] vertices;
private double[] bulges;
private double[][] widths;
/**
* Read a LwPolyline in the DWG format Version 15
*
* @param data Array of unsigned bytes obtained from the DWG binary file
* @param offset The current bit offset where the value begins
* @throws Exception If an unexpected bit value is found in the DWG file. Occurs
* when we are looking for LwPolylines.
*/
public void readDwgLwPolylineV15(int[] data, int offset) throws Exception {
//System.out.println("DwgLwPolyline.readDwgLwPolyline() executed ...");
int bitPos = offset;
bitPos = readObjectHeaderV15(data, bitPos);
Vector v = DwgUtil.getBitShort(data, bitPos);
bitPos = ((Integer)v.get(0)).intValue();
int flag = ((Integer)v.get(1)).intValue();
this.flag = flag;
// Condici�n emp�rica. Si flag es menor que cero no se trata de LwPolylines ...
if (flag>=0) {
double constWidth = 0.0;
if ((flag & 0x4)>0) {
v = DwgUtil.getBitDouble(data, bitPos);
bitPos = ((Integer)v.get(0)).intValue();
constWidth = ((Double)v.get(1)).doubleValue();
}
this.constWidth = constWidth;
double elev = 0.0;
if ((flag & 0x8)>0) {
v = DwgUtil.getBitDouble(data, bitPos);
bitPos = ((Integer)v.get(0)).intValue();
elev = ((Double)v.get(1)).doubleValue();
}
elevation = elev;
double thickness = 0.0;
if ((flag & 0x2)>0) {
v = DwgUtil.getBitDouble(data, bitPos);
bitPos = ((Integer)v.get(0)).intValue();
thickness = ((Double)v.get(1)).doubleValue();
}
this.thickness = thickness;
double nx = 0.0, ny = 0.0, nz = 0.0;
if ((flag & 0x1)>0) {
v = DwgUtil.getBitDouble(data, bitPos);
bitPos = ((Integer)v.get(0)).intValue();
nx = ((Double)v.get(1)).doubleValue();
v = DwgUtil.getBitDouble(data, bitPos);
bitPos = ((Integer)v.get(0)).intValue();
ny = ((Double)v.get(1)).doubleValue();
v = DwgUtil.getBitDouble(data, bitPos);
bitPos = ((Integer)v.get(0)).intValue();
nz = ((Double)v.get(1)).doubleValue();
}
normal = new double[]{nx, ny, nz};
v = DwgUtil.getBitLong(data, bitPos);
bitPos = ((Integer)v.get(0)).intValue();
int np = ((Integer)v.get(1)).intValue();
// TODO: Condici�n emp�rica. Si hay m�s de 10000 puntos no se trata de LwPolylines.
// Este tema hay que revisarlo porque si pueden existir LwPolylines con m�s de
// 10000 v�rtices ...
// Se han encontrado lwplines con np = 0. Estas lwplines tambin ser ignoradas.
if (np>0 && np<10000) {
long nb = 0;
if ((flag & 0x10)>0) {
v = DwgUtil.getBitLong(data, bitPos);
bitPos = ((Integer)v.get(0)).intValue();
nb = ((Integer)v.get(1)).intValue();
}
long nw = 0;
if ((flag & 0x20)>0) {
v = DwgUtil.getBitLong(data, bitPos);
bitPos = ((Integer)v.get(0)).intValue();
nw = ((Integer)v.get(1)).intValue();
}
//System.out.println("np = " + np);
Point2D[] vertices = new Point2D[np];
v = DwgUtil.getRawDouble(data, bitPos);
bitPos = ((Integer)v.get(0)).intValue();
double vx = ((Double)v.get(1)).doubleValue();
v = DwgUtil.getRawDouble(data, bitPos);
bitPos = ((Integer)v.get(0)).intValue();
double vy = ((Double)v.get(1)).doubleValue();
vertices[0] = new Point2D.Double(vx, vy);
for (int i=1; i<(np); i++) {
v = DwgUtil.getDefaultDouble(data, bitPos, vx);
bitPos = ((Integer)v.get(0)).intValue();
double x = ((Double)v.get(1)).doubleValue();
v = DwgUtil.getDefaultDouble(data, bitPos, vy);
bitPos = ((Integer)v.get(0)).intValue();
double y = ((Double)v.get(1)).doubleValue();
vertices[i] = new Point2D.Double(x, y);
vx = x;
vy = y;
}
this.vertices = vertices;
double[] bulges = new double[0];
if (nb>0) {
bulges = new double[(int)nb];
for (int i=0; i0) {
double[][] widths = new double[(int)nw][2];
for (int i=0; i