Function copy_from

LASzip/src/laspoint.hpp:263–287

  };

  void copy_from(const U8* buffer) {
    if (extended_point_type) {
      memcpy(&X, buffer, 14);
      ((U8*)&X)[24] = buffer[14];  // extended return number and number of returns
      extended_classification_flags = buffer[15] & 0x0F;
      ((U8*)&X)[15] = (buffer[15] & 0x07) << 5;  // legacy classification flags
      extended_scanner_channel = (buffer[15] >> 4) & 0x03;
      scan_direction_flag = (buffer[15] >> 6) & 0x01;
      edge_of_flight_line = (buffer[15] >> 7) & 0x01;
      ((U8*)&X)[23] = buffer[16];  // extended classification
      if (extended_classification < 32) classification = extended_classification;
      ((U8*)&X)[17] = buffer[17];                // user data
      ((I16*)&X)[10] = ((const I16*)buffer)[9];  // extended scan angle
      ((U16*)&X)[9] = ((const U16*)buffer)[10];  // point source ID
      memcpy(&gps_time, buffer + 22, 8);
    } else {
      memcpy(&X, buffer, 20);
    }
    U32 i;
    U32 b = items[0].size;
    for (i = 1; i < num_items; i++) {
      memcpy(point[i], &buffer[b], items[i].size);
      b += items[i].size;
    }
  };

  // these functions set the desired point format (and maybe add on attributes in extra bytes)