// **********************************************************************
//
// <copyright>
//
// BBN Technologies
// 10 Moulton Street
// Cambridge, MA 02138
// (617) 873-8000
//
// Copyright (C) BBNT Solutions LLC. All rights reserved.
//
// </copyright>
// **********************************************************************
//
// $Source: /cvs/distapps/openmap/src/openmap/com/bbn/openmap/layer/link/LinkLine.java,v $
// $RCSfile: LinkLine.java,v $
// $Revision: 1.3.2.2 $
// $Date: 2007/02/26 17:11:52 $
// $Author: dietrick $
//
// **********************************************************************
package com.bbn.openmap.layer.link;
import com.bbn.openmap.omGraphics.OMLine;
import com.bbn.openmap.util.Debug;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
/**
* Read and write a Link protocol version of a line.
*/
public class LinkLine implements LinkGraphicConstants, LinkPropertiesConstants {
/**
* Write a line using lat/lon endpoints. The lat/lons are in decimal
* degrees. .
*
* @param lat_1 latitude of placement of start of line.
* @param lon_1 longitude of placement of start of line.
* @param lat_2 latitude of placement of end of line.
* @param lon_2 longitude of placement of end of line.
* @param lineType type of line - straight, rhumb, great circle..
* @param properties Properties containing attributes.
* @param dos DataOutputStream to write to.
* @throws IOException
*/
public static void write(float lat_1, float lon_1, float lat_2,
float lon_2, int lineType,
LinkProperties properties, DataOutputStream dos)
throws IOException {
LinkLine.write(lat_1,
lon_1,
lat_2,
lon_2,
lineType,
-1,
properties,
dos);
}
/**
* Write a line using lat/lon endpoints. The lat/lons are in decimal
* degrees. This method gives you the option of specifying a number of
* segments to use in approximating a curved line.
*
* @param lat_1 latitude of placement of start of line.
* @param lon_1 longitude of placement of start of line.
* @param lat_2 latitude of placement of end of line.
* @param lon_2 longitude of placement of end of line.
* @param lineType type of line - straight, rhumb, great circle..
* @param nsegs number of points to use to approximate curved line..
* @param properties Properties containing attributes.
* @param dos DataOutputStream to write to.
* @throws IOException
*/
public static void write(float lat_1, float lon_1, float lat_2,
float lon_2, int lineType, int nsegs,
LinkProperties properties, DataOutputStream dos)
throws IOException {
dos.write(Link.LINE_HEADER.getBytes());
dos.writeByte(GRAPHICTYPE_LINE);
dos.writeByte(RENDERTYPE_LATLON);
dos.writeByte(lineType);
dos.writeFloat(lat_1);
dos.writeFloat(lon_1);
dos.writeFloat(lat_2);
dos.writeFloat(lon_2);
dos.writeInt(nsegs);
properties.write(dos);
}
/**
* Write a line with x/y pixel endpoints.
*
* @param x1 Horizontal pixel placement of start of line.
* @param y1 Vertical pixel placement of start of line.
* @param x2 Horizontal pixel placement of end of line.
* @param y2 Vertical pixel placement of end of line.
* @param properties Properties containing attributes.
* @param dos DataOutputStream to write to.
* @throws IOException
*/
public static void write(int x1, int y1, int x2, int y2,
LinkProperties properties, DataOutputStream dos)
throws IOException {
dos.write(Link.LINE_HEADER.getBytes());
dos.writeByte(GRAPHICTYPE_LINE);
dos.writeByte(RENDERTYPE_XY);
dos.writeInt(x1);
dos.writeInt(y1);
dos.writeInt(x2);
dos.writeInt(y2);
properties.write(dos);
}
/**
* Write a line located at an x/y pixel offset from a lat/lon location.
*
* @param lat_1 latitude of placement of line.
* @param lon_1 longitude of placement of line.
* @param x1 Horizontal pixel offset of start of line.
* @param y1 Vertical pixel offset of start of line.
* @param x2 Horizontal pixel offset of end of line.
* @param y2 Vertical pixel offset of end of line.
* @param properties Properties containing attributes.
* @param dos DataOutputStream to write to.
* @throws IOException
*/
public static void write(float lat_1, float lon_1, int x1, int y1, int x2,
int y2, LinkProperties properties,
DataOutputStream dos) throws IOException {
dos.write(Link.LINE_HEADER.getBytes());
dos.writeByte(GRAPHICTYPE_LINE);
dos.writeByte(RENDERTYPE_OFFSET);
dos.writeFloat(lat_1);
dos.writeFloat(lon_1);
dos.writeInt(x1);
dos.writeInt(y1);
dos.writeInt(x2);
dos.writeInt(y2);
properties.write(dos);
}
/**
* Write an OMLine to the link.
*/
public static void write(OMLine line, Link link, LinkProperties props)
throws IOException {
switch (line.getRenderType()) {
case OMLine.RENDERTYPE_LATLON:
float[] ll = line.getLL();
LinkLine.write(ll[0],
ll[1],
ll[2],
ll[3],
line.getLineType(),
line.getNumSegs(),
props,
link.dos);
break;
case OMLine.RENDERTYPE_XY:
int[] pts = line.getPts();
LinkLine.write(pts[0], pts[1], pts[2], pts[3], props, link.dos);
break;
case OMLine.RENDERTYPE_OFFSET:
ll = line.getLL();
pts = line.getPts();
LinkLine.write(ll[0],
ll[1],
pts[0],
pts[1],
pts[2],
pts[3],
props,
link.dos);
break;
default:
Debug.error("LinkLine.write: line rendertype unknown.");
}
}
/**
* Read the line Link protocol off a DataInputStream, and create an OMLine
* from it. Assumes that the header has already been read.
*
* @param dis DataInputStream to read from.
* @return OMLine
* @throws IOException
* @see com.bbn.openmap.omGraphics.OMLine
*/
public static OMLine read(DataInputStream dis) throws IOException {
return read(dis, null);
}
/**
* Read the line Link protocol off a DataInputStream, and create an OMLine
* from it. Assumes that the header has already been read.
*
* @param dis DataInputStream to read from.
* @param propertiesBuffer a LinkProperties object used to cache previous
* settings that can be set on the OMLine being read.
* @return OMLine
* @throws IOException
* @see com.bbn.openmap.omGraphics.OMLine
*/
public static OMLine read(DataInputStream dis,
LinkProperties propertiesBuffer)
throws IOException {
OMLine line = null;
float lat_1 = 0.0f;
float lon_1 = 0.0f;
float lat_2 = 0.0f;
float lon_2 = 0.0f;
int x1 = 0;
int y1 = 0;
int x2 = 0;
int y2 = 0;
int nsegs = -1;
int renderType = dis.readByte();
switch (renderType) {
case RENDERTYPE_LATLON:
int lineType = dis.readByte();
lat_1 = dis.readFloat();
lon_1 = dis.readFloat();
lat_2 = dis.readFloat();
lon_2 = dis.readFloat();
nsegs = dis.readInt();
line = new OMLine(lat_1, lon_1, lat_2, lon_2, lineType, nsegs);
break;
case RENDERTYPE_XY:
x1 = dis.readInt();
y1 = dis.readInt();
x2 = dis.readInt();
y2 = dis.readInt();
line = new OMLine(x1, y1, x2, y2);
break;
case RENDERTYPE_OFFSET:
lat_1 = dis.readFloat();
lon_1 = dis.readFloat();
x1 = dis.readInt();
y1 = dis.readInt();
x2 = dis.readInt();
y2 = dis.readInt();
line = new OMLine(lat_1, lon_1, x1, y1, x2, y2);
break;
default:
}
if (line != null) {
LinkProperties.loadPropertiesIntoOMGraphic(dis,
line,
propertiesBuffer);
}
return line;
}
}