Structs?[solved]

Gamestudio Links

Zorro Links

Newest Posts

Trading Journey
by howardR. 04/24/24 20:04

M1 Oversampling
by Petra. 04/24/24 10:34

Zorro FIX plugin - Experimental
by flink. 04/21/24 07:12

Data from CSV not parsed correctly
by EternallyCurious. 04/20/24 21:39

Scripts not found
by juergen_wue. 04/20/24 18:51

zorro 64bit command line support
by 7th_zorro. 04/20/24 10:06

StartWeek not working as it should
by jcl. 04/20/24 08:38

folder management functions
by VoroneTZ. 04/17/24 06:52

AUM Magazine

Latest Screens

Who's Online Now

1 registered members (AndrewAMD), 642 guests, and 3 spiders.

Key: Admin, Global Mod, Mod

Newest Members

Mega_Rod, EternallyCurious, howardR, 11honza11, ccorrea
19048 Registered Users

Print Thread

Rate Thread

Structs?[solved] #351977 12/30/10 13:08 12/30/10 13:08
Joined: Sep 2010 Posts: 82 P peteredlin OP Junior Member
peteredlin OP Junior Member P Joined: Sep 2010 Posts: 82	Hello for a project i want to use a struct to load my function. But how do i make the function accept differrent structs of the (same type of course) All help is welcome Last edited by peteredlin; 12/31/10 00:53.

Re: Structs? [Re: peteredlin] #351981 12/30/10 13:38 12/30/10 13:38
Joined: Nov 2007 Posts: 1,143 United Kingdom DJBMASTER Serious User
DJBMASTER Serious User Joined: Nov 2007 Posts: 1,143 United Kingdom	Hi, all you need to do is pass a pointer to a structure into your function... Code: typedef struct { var ammo; var reload_rate; } Gun; function ReloadWeapon(Gun* gun) { gun -> ammo = 100; } void main() { Gun new_gun; ReloadWeapon(&new_gun); }

Re: Structs? [Re: peteredlin] #351982 12/30/10 13:43 12/30/10 13:43
Joined: Feb 2009 Posts: 3,207 Germany, Magdeburg Rei_Ayanami Expert
Rei_Ayanami Expert Joined: Feb 2009 Posts: 3,207 Germany, Magdeburg	Put a id variable as the first variable of all your different structs. Than, take the void in the function like this: void yourFunction(void* structVoid) { Copy the the first byte into a temponary struct, to identfy the struct. INDENTSTRUCT* newIdent = sys_malloc(sizeof(INDENTSTRUCT)); memcpy(newIdent, structVoid, 4); //in case you are using a var, as it has 4 bytes if(newIdent.id == 1) //Your first Struct { YOURFIRSTSTRUCT* tempStruct; memcpy(tempStruct, structVoid, sizeof(YOURFIRSTSTRUCT)); the same goes for id two and so on Hope this helps MarianFrische.com

Re: Structs? [Re: Rei_Ayanami] #351994
12/30/10 15:36 12/30/10 15:36

Joined: Sep 2010
Posts: 82

peteredlin Offline

OP
Junior Member

peteredlin Offline

OP
Junior Member

Joined: Sep 2010
Posts: 82

why does the following code not work then?

Code:

///////////////////////////////
#include <acknex.h>
#include <default.c>
#include <ackphysx.h>

///////////////////////////////

typedef struct
{
	ENTITY* entity;
	char filename;
	VECTOR* position;
} simple_ent;



function Create_ent(simple_ent* ent)
{
	ent.entity = ent_create(ent.filename,ent.position,NULL);
	

}




ENTITY* box;

function main()
{
 	simple_ent cube;
	cube.filename = "cube.mdl";
	cube.position=vector(0,0,0);
 	
 	physX_open();
 	level_load("level.hmp");
 	Create_ent(cube);
 	//while(1)
 	//{
 	//box.x+=0.001;
 	//wait(1);
 	
 	//}
 	
 	
}

I get an error that the file cant be opened

Last edited by peteredlin; 12/30/10 15:37.

Re: Structs? [Re: peteredlin] #351995 12/30/10 15:41 12/30/10 15:41
Joined: Feb 2009 Posts: 3,207 Germany, Magdeburg Rei_Ayanami Expert
Rei_Ayanami Expert Joined: Feb 2009 Posts: 3,207 Germany, Magdeburg	it fails here: cube.position=vector(0,0,0); MarianFrische.com

Re: Structs? [Re: peteredlin] #351997 12/30/10 16:10 12/30/10 16:10
Joined: Nov 2007 Posts: 2,568 Germany, BW, Stuttgart MasterQ32 Expert
MasterQ32 Expert Joined: Nov 2007 Posts: 2,568 Germany, BW, Stuttgart	try char* instead of char Visit my site: www.masterq32.de

Re: Structs? [Re: Rei_Ayanami] #351998 12/30/10 16:11 12/30/10 16:11
Joined: May 2007 Posts: 2,043 Germany Lukas Programmer
Lukas Programmer Joined: May 2007 Posts: 2,043 Germany	There are multiple errors in that code. Firstly, you defined your filename string wrong. "char filename;" defines only one character. You have to use "char* filename;" to create a char array. Secondly, with "cube.filename = "cube.mdl";" you just create a temporary char array. (This only works when initialising a char array while defining it, but that might not even work in Lite-C either.) It will be invalid in the next line. This is how you should to it: Code: cube.filename = malloc(sizeof(char)number_of_characters_you_need_plus_one); strcpy(cube.filename,"cube.mdl"); // strcpy, not str_cpy For your vector, better use VECTOR, instead of VECTOR. Then you can just set it like this: Code: cube.position.x = 0; cube.position.y = 0; cube.position.z = 0; Last edited by Lukas; 12/31/10 11:00. Reason: sizeof(char) instead of sizeof(char*) Kubetris LBGUI

Re: Structs? [Re: Lukas] #352020 12/30/10 20:25 12/30/10 20:25
Joined: Sep 2010 Posts: 82 P peteredlin OP Junior Member
peteredlin OP Junior Member P Joined: Sep 2010 Posts: 82	Thank you very much! Now it works, learned some again

Re: Structs? [Re: peteredlin] #352071 12/31/10 11:02 12/31/10 11:02
Joined: May 2007 Posts: 2,043 Germany Lukas Programmer
Lukas Programmer Joined: May 2007 Posts: 2,043 Germany	You're welcome. But please note that I made a little error in my code. It should be sizeof(char) instead of sizeof(char*). This way four times the nececcary memory was allocated. Kubetris LBGUI

Moderated by mk_1, Perro, rayp, Realspawn, Rei_Ayanami, rvL_eXile, Spirit, Superku, Tobias, TSG_Torsten, VeT