[SOLVED] Node movement from text file

[Walters.Robert]

I have a set of pre-recorded data that I want to use to move a node.  The data is space deliminated with the following format for each line:

time  xpos  ypos  zpos  xrot  yrot  zrot

inside the Unigine script flush() function here is my code:

   File shipData = new File("myPositionAndRotationData.txt","r"); //
    
    int shipSize = shipData.getSize();  //i used this to make sure that the file was loaded
    int filePosition = shipData.tell();
    
    string shipLine = shipData.readLine();
    log.message("the file position is " + filePosition + " the data at this position is " + shipLine + " \n");
    shipData.seekCur(1);

It correctly prints the first line of the data but never moves to the next line, instead it continually prints the same line.  I thought that I could increment to the next line in the file using the seekCur() function but haven't had any luck (i've tried different integers etc).  How do I update it so that I can read the next line.

[cash-metall]

Hello Robert!

When you reopen the file, the cursor moves to the beginning of the file. There are two ways to avoid this:

1. if the file is not large - read all at initialization.

int init() {
	File shipData = new File("file.txt","r");
	while (!shipData.eof())
	{
		string shipLine = shipData.readLine();
		//save data in any container
		log.message("read: %s \n", shipLine );
	}
  	shipData.close();
}

2. open the file and do not close it.

File shipData;

int init() {
	shipData = new File("file.txt","r");
	return 1;
}

int flush() {
	// Write here code to be called before updating each physics frame: control physics in your application and put non-rendering calculations.
	// The engine calls flush() with the fixed rate (60 times per second by default) regardless of the FPS value.
	// WARNING: do not create, delete or change transformations of nodes here, because rendering is already in progress.
  
	//if end of file - set cursor to start of file
	if (shipData.eof()) shipData.seekSet(0);
	
	string shipLine = shipData.readLine();
	//save data in any container
	log.message("read: %s \n", shipLine );
	return 1;
}

int shutdown() {
	shipData.close()
	return 1;
}

 

[Walters.Robert]

Thanks, it is working great!