General Ndless Questions and Support

[epic7]

What are the screen dimensions?

How do I display integers (with nRGBlib)?

[ExtendeD]

The screen is 240x320.

Use something like this to convert it to a string:

char buf[20];
sprintf(buf, "%i", thenumber);

Then display the string with nRGBlib.

[Levak]

A smarter way to debug values on the handled is to user sprintf and show_msgbox =)

[epic7]

The screen is 240x320.

Use something like this to convert it to a string:

char buf[20];
sprintf(buf, "%i", thenumber);

Then display the string with nRGBlib.

So the string is called buf in this example?

Also, is there a way to save high scores?

[Levak]

Also, is there a way to save high scores?

Writting in a file ?

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FILE * f = fopen("/documents/mygame_highscore.tns", "w+"); char buf[integerSize(highscore) + 2]; sprintf(buf, "%d", highscore); fputs(buf, f); fclose(f); refresh_osscr(); // refresh OS screen so that we can see the created file when we exit the program

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int integerSize(int n) {   int i;   for(i = 0; n > 0; n/= 10, i++);   return n }

[ExtendeD]

You can also use fwrite or fprintf for this (666th post!)

[DJ Omnimaga]

I wonder... is self-modifying code possible in Ndless, as in highscores storing themselves inside their respective games rather than external files? I saw that happen often on the TI-83 Plus in the past.

[Jim Bauwens]

I suppose so, but it isn't the most easy thing to do. Maybe someone can make a lib for it

[DJ Omnimaga]

Actually I do not remember what was the main use on the TI-83 Plus since external data was often in appvar form anyway and did not take any space in the PRGM/apps menu, but on the TI-Nspire I notice that external files often clutter the TI-Nspire document explorer, and I remember people ranting about having too many files on the TI-83 Plus before, which tells me some TI-Nspire users might not like it very much to see their menu cluttered. It is particularly bad when you got 50 gbc4nspire ROMs with savestates. Of course there are folders, though.

[epic7]

I suppose so, but it isn't the most easy thing to do. Maybe someone can make a lib for it

That would be nice.

* epic7 thinks he'll skip high scores for now

[Levak]

I wonder... is self-modifying code possible in Ndless, as in highscores storing themselves inside their respective games rather than external files? I saw that happen often on the TI-83 Plus in the past.

You can, but if the file size get modified, like if you recompile with extra stuff / updates, the highscore system will crash.

[DJ Omnimaga]

Ok thanks for the info.

Also any executable code size limit or file size limit? On 68K calcs, I think it was 64 KB for both and on the 83+, a file cannot be larger than 65535 KB in archive and as large as the RAM allows in RAM, but the code limit on the 83+ for regular program files was 8.1 KB or 8.8 KB depending of where you ran it.

[Jim Bauwens]

Levak, if you store the data on the end of the tns file, and you can get the size of it using Ndless there should not be any problem.

[Levak]

Levak, if you store the data on the end of the tns file, and you can get the size of it using Ndless there should not be any problem.

But you will lose highscore on each modification, it was a part of what I meant.

[calc84maniac]

The fgets function seems to have a glitch:

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char *fgets(char *str, int num, FILE *str2eam) { char *str2 = str; while (num--) { char c = fgetc(str2eam); //THIS IS THE BUGGY LINE if (c == EOF) { *str2 = '\0'; return NULL; } *str2++ = c; if (c == '\n') break; } *str2 = '\0'; return str; }

The c variable should be specified as an int, not a char -- it looks like the compiler treated the char as unsigned and optimized out the return NULL entirely! Plus, it is possible that an 0xFF character exists in the file, so signed char is not the way to go.