Back on the case today: trying to work out why I can’t print bird positions to a text file. I’ve moved the code around a little to include a try-catch expression, which compiles okay — the simulation now works. I can get the simulatino to output the results to the screen. However, I can’t get the system to write to a text file for some reason — grr!! This is what happended the last time though … for some reason the code would not dave to a text file, but *something* happened which then enabled it to.
Ahah! Success! I appended a “true” to the code that opens a BufferedWriter, and it now works! Code follows below:
try {
BufferedWriter out = new BufferedWriter (new FileWriter(“boidposition_out.txt”, true));
while((b = boidsList.getBoid(i)) != null) {
b.animateBoid();
float x = b.getBoidPosX();
float y = b.getBoidY();
float z = b.getBoidZ();
String s_x = Float.toString(x);
String s_y = Float.toString(y);
String s_z = Float.toString(z);
String position_result = i + “,” + s_x + “,” + s_y + “,” + s_z + “\n”;
System.out.print(position_result); // print to screen
out.write(position_result); // print to text file
i++;
} // end of while
out.close();
} catch (IOException e) {
System.out.println(“Exception ” + e);
}
But what happens if I increase the number of birds in the simulation –> 20 (currently have 10) …? I get 20 locations outputted in the text file!!
However, there is an issue: I can’t print the timestep for some reason: i.e. just a counter that increments for each cycle of position changes. Hmm mmore thought is required …
