Post by: Alex on May 19, 2006, 05:39:00 am
What methods do you use?
- Alex
Post by: tifreak on May 19, 2006, 06:18:00 am
Inside the walking engine, I have the calculator do a check to see if the tile that the character is currently sitting on is a tile that would take it to a different area, or for that matter, have it do something else entirely. It just depends on the situation.
Anyways, it checks to see if it equals that particular tile, either by numerical value, or by a character representing it, depending on hit detection methods. If the boolean is true, then it calls another program, to do the redirect from there, allowing the engine to stay fairly small, and not become bloated with that other code.
Do you understand, or would you like me to provide sample code (it would be in z80 basic)??
Post by: Alex on May 19, 2006, 08:13:00 am
Tilemap:
000000000
008000000
000000900
000000000
000000000
Pseudo-code:
if(tile_player_is_on == 8) subprogram()
else if(tile_player_is_on == 9) subprogram2()
subprogram and subprogram2 contain the redirect or specific data that I want to happen when the player is on that tile.
- Alex
Post by: tifreak on May 19, 2006, 08:43:00 am
to make it easier, and the engine more compact, I have it do this:
If (Char Position) != 0: prgmEvent
This works wonderfully, as long as inside the movement, you restirct where the character can go.
Inside prgmEvent:
If (Char Position) = 8: Deal with Event
If (Char Position) = 9: Deal with Event
etc...
prgmEvent also redirects to another program, if neccessary. I have found this increases the speed of things on the z80, though I have only made a couple progs on the 68k basic, so I don't know a whole lot about it...
Post by: Liazon on May 19, 2006, 09:25:00 am
hey, btw Alex, can you use run a function if you know the pointer to the function, or can that only be done in 68k ASM?
Post by: Alex on May 19, 2006, 09:37:00 am
Let's say tiles with number greater than 0 are event triggers on the event tile map:
void function(void) {
//do something
}
void function2(void) {
//do something else
}
void* functions[2] = { function, function2 };
...
if(tile > 0) functions[tile];
Of course, this code is wrong, but that's the structure I'm going for.
Keep the ideas coming, and thank you everyone!
- Alex
Post by: Alex on May 19, 2006, 10:36:00 am
In C it would be:
void function(void);
void function2(void);
void (*functions[2])(void) = { NULL };
functions[0] = &function;
functions[1] = &function2;
...
if(tile > 0) (*functions[tile])();
It should work in TIGCC, perhaps with a little tweaking of the pointer casts.
- Alex
Post by: saubue on May 19, 2006, 11:58:00 am
Post by: Fryedsoft on May 19, 2006, 12:04:00 pm
basicially...
c1-->
| CODE |
| ec1 If (tilenumber) != 0 expr("run"&string(tilenumber)&"()") c2 |
ec2
if tilenumber = 5, the expr command will execute run5. 6 will execute run6, ETC. if you put a variable between the "()" (say Tilenumber for example) it will send that variable to the program, so if tilenumber was 6, it would be execute run6(6).
if tilenumber = 5, the expr command will execute run5. 6 will execute run6, ETC. if you put a variable between the "()" (say Tilenumber for example) it will send that variable to the program, so if tilenumber was 6, it would be execute run6(6).
Post by: Liazon on May 19, 2006, 02:10:00 pm
| QUOTE (Alex @ May 19 2006, 04:36 PM) |
| I just found something: http://www.newty.de/fpt/fpt.html In C it would be: void function(void); void function2(void); void (*functions[2])(void) = { NULL }; functions[0] = &function; functions[1] = &function2; ... if(tile > 0) (*functions[tile])(); It should work in TIGCC, perhaps with a little tweaking of the pointer casts. - Alex |
Awesome!! no idea how this code works, but I'll figure it out. I made the suggestion only because in z80 ASM, you could probably store the location of a function/label into a variable, and then jump to that function.
So, the ASM would look like a switch case block where each option stored a different function location/address to the address variable that the main funtion will jump to.
Probably could be simplified more though in ASM. I guess it's this freedom that I enjoy about ASM. It's the huge amount of code in ASM that makes me prefer the niceness of C. :)
:):)Post by: Alex on May 19, 2006, 02:37:00 pm
- Alex
Post by: Dragon__lance on May 19, 2006, 03:38:00 pm
In z80 ASM, wouldn't you use vector tables to do the jumping for doors and such in a tilemap routine?
Post by: Liazon on May 20, 2006, 05:32:00 am
. Either way, it's the idea that labels are address/pointers to functions, which in ASM can be used as a jump location. I just wasn't sure if it could still be done in C. otherwise a most likely bloated C if else structure would probably be needed.
Post by: saubue on May 20, 2006, 09:32:00 am
| QUOTE (Alex @ May 20 2006, 03:37 AM) |
| Yea, there's something about nicely structured, tabbed C code that screams "pure logic!". :) - Alex |
Right, but I like C++ more, because classes make it even more logical to me. That might by a reason why I like using typedef structs in my C projects... :P
Post by: Alex on May 20, 2006, 10:20:00 am
- Alex
Post by: saubue on May 20, 2006, 10:55:00 am
I'm using them a lot in Advanced Dialogs Pro (one of my current projects). The user will have to deal with GUI-elements all the time, and all of them are structures that can be used for all kind of stuff (I'm trying to make the lib as extensible as possible, so that you can write your own GUI elements very easy).
Here's the stucture of an element:
c1-->
| CODE | ||
| ec1typedef struct _adel /* Basic element type */ { void *parent; Post by: Liazon on May 20, 2006, 10:58:00 am
What does this line mean? I understand what you're doing with everything else, but what kind of void pointer are you initiating? saubue: )_) Post by: saubue on May 20, 2006, 11:02:00 am |