/**
* Read a x, y and z in point of LAS file
*
* @param input input buffer to read
* @param Offset Offset to data
* @param index index of points to read
* @return true if success else return false
*/
public void readPoint3D(BigByteBuffer2 input, LidarHeader hdr, long index) {
byte[] punto = new byte[16];
input.position((hdr.getOffsetData() + getSizeFormat() * index) + 4);
input.get(punto);
setX(ByteUtilities.arr2Int(punto, 4));
setY(ByteUtilities.arr2Int(punto, 8));
setZ(ByteUtilities.arr2Int(punto, 12));
}
/**
* Read a point of BIN file
*
* @param input input file to read
* @param Offset Offset to data
* @param index index of points to read
* @return true if success else return false
*/
public void readPoint(BigByteBuffer2 input, LidarHeader hdr, long index) {
try {
if (index > hdr.getNumPointsRecord() || index < 0) {
throw new UnexpectedPointException("Out of Index");
}
if (index == lasIndex) return;
else lasIndex = index;
int auxIndex;
byte[] punto = new byte[getSizeFormat()];
byte[] aux = new byte[2];
input.position(hdr.getOffsetData() + getSizeFormat() * index);
input.get(punto);
setClassification((char) (punto[0] & 0xFF));
setFlightLine((char) (punto[1] & 0xFF));
aux[0] = punto[2];
aux[1] = (byte) (punto[3] & 0X3F);
setIntensity(ByteUtilities.arr2Unsignedshort(aux, 0)); // bits de 0-13
setEchoInformation((byte) ((punto[3] & 0xC0) >> 2)); // bits 14 y 15
setX(ByteUtilities.arr2Int(punto, 4));
setY(ByteUtilities.arr2Int(punto, 8));
setZ(ByteUtilities.arr2Int(punto, 12));
auxIndex = 16;
// si hay gps leelo
if (isTimeGPS) {
setTime(ByteUtilities.arr2Int(punto, auxIndex));
auxIndex += 4;
}
// si hay color leelo
if (isColor) {
char[] c = new char[4];
c[0] = (char) (punto[auxIndex] & 0xFF);
c[1] = (char) (punto[auxIndex + 1] & 0xFF);
c[2] = (char) (punto[auxIndex + 2] & 0xFF);
c[3] = (char) (punto[auxIndex + 3] & 0xFF);
setcolor(c);
}
} catch (UnexpectedPointException e) {
e.printStackTrace();
}
}
/**
* Read x and y in point of BIN file
*
* @param input input buffer to read
* @param Offset Offset to data
* @param index index of points to read
* @return true if success else return false
*/
public Point2D.Double readPoint2D(BigByteBuffer2 input, LidarHeader hdr, long index) {
byte[] punto = new byte[12];
input.position((hdr.getOffsetData() + getSizeFormat() * index) + 4);
input.get(punto);
setX(ByteUtilities.arr2Int(punto, 4));
setY(ByteUtilities.arr2Int(punto, 8));
return new Point2D.Double(
(getX() - hdr.getXOffset()) / hdr.getXScale(),
(getY() - hdr.getYOffset()) / hdr.getYScale());
}
/**
* @param name
* @param f
* @param numPruebas
* @throws Exception
*/
private void prueba2(String name, File f, int numPruebas) throws Exception {
FileInputStream fin;
fin = new FileInputStream(f);
// Open the file and then get a channel from the stream
FileChannel channel = fin.getChannel();
int size = (int) channel.size();
// Get the file's size and then map it into memory
ByteBuffer bbCorrect = channel.map(FileChannel.MapMode.READ_ONLY, 0, size);
// Chunkeo a 1KB
Random rnd = new Random();
long t1 = System.currentTimeMillis();
for (int i = 0; i < numPruebas; i++) {
int pos = rnd.nextInt(size - 10);
// pos = 0;
bbCorrect.position(pos);
int bCorrect = bbCorrect.getInt();
// bb.position(pos);
int bPrueba = bb.getInt(pos);
if (bCorrect != bPrueba) {
System.err.println(name + "Error de lectura. " + bCorrect + " " + bPrueba);
throw new Exception("Error con pos=" + pos);
} else {
System.out.println(name + "Correcto: pos=" + pos + " byte= " + bPrueba);
}
}
close(channel2, fin2, bb);
long t2 = System.currentTimeMillis();
System.out.println("T=" + (t2 - t1) + "mseconds");
}
