/// <summary>
/// gets points at specified index
/// </summary>
/// <param name="startIndex"></param>
/// <param name="number"></param>
/// <returns></returns>
public unsafe object GetPoints(uint startIndex, int number)
{
if (m_reader == null)
{
return(null);
}
positionAtPointN(startIndex);
byte[] pointdata = m_reader.ReadBytes(sizeOfPointStruct * number);
if (pointdata == null)
{
return(null);
}
//number of points actually read
int numPointsRead = pointdata.Length / sizeOfPointStruct;
if (numPointsRead == 0)
{
return(null);
}
//Console.WriteLine("num points to read: {0}, num read: {1}", number, numPointsRead);
if (header.PointDataFormat == 0)
{
LASPointFormat0[] pf0_buffer = new LASPointFormat0[numPointsRead];
fixed(LASPointFormat0 *p = pf0_buffer)
{
IntPtr MyIntPtr = (IntPtr)p;
Marshal.Copy(pointdata, 0, MyIntPtr, pointdata.Length);
}
return(pf0_buffer);
}
else if (header.PointDataFormat == 1)
{
LASPointFormat1[] pf1_buffer = new LASPointFormat1[numPointsRead];
fixed(LASPointFormat1 *p = pf1_buffer)
{
IntPtr MyIntPtr = (IntPtr)p;
Marshal.Copy(pointdata, 0, MyIntPtr, pointdata.Length);
}
return(pf1_buffer);
}
//if smth goes wrong return null
return(null);
}
/// <summary>
/// gets an array of points starting at the current position
/// </summary>
/// <returns></returns>
public unsafe object GetPoints(int number)
{
if (m_reader == null)
{
return(null);
}
byte[] pointdata = m_reader.ReadBytes(number * sizeOfPointStruct);
if (pointdata == null)
{
return(null);
}
//number of points actually read
int numPointsRead = pointdata.Length / sizeOfPointStruct;
//Console.WriteLine("num points to read: {0}, num read: {1}", number, numPointsRead);
if (header.PointDataFormat == 0)
{
LASPointFormat0[] arr = new LASPointFormat0[numPointsRead];
fixed(LASPointFormat0 *p = arr)
{
IntPtr MyIntPtr = (IntPtr)p;
Marshal.Copy(pointdata, 0, MyIntPtr, pointdata.Length);
}
return(arr);
}
else if (header.PointDataFormat == 1)
{
LASPointFormat1[] arr = new LASPointFormat1[numPointsRead];
fixed(LASPointFormat1 *p = arr)
{
IntPtr MyIntPtr = (IntPtr)p;
Marshal.Copy(pointdata, 0, MyIntPtr, pointdata.Length);
}
return(arr);
}
return(null);
}