Hey friends.
I hope you can help me with my lil game what i´m writing in C with the PaLib library for my nintendo ds. I have a ship what´s flying through the orbit. when the ship is landing in the space-station i want to have the option "buy new station". But how do i code the creation of a new station. i just need the idea of how doing that.
Will be happy about any help.
Here´s the code till now:
// Includes
#include <PA9.h>
#include "gfx/all_gfx.c"
#include "gfx/all_gfx.h"
int main(int argc, char ** argv)
{
PA_Init();
PA_InitVBL();
PA_EasyBgLoad(0, 1, aa);
PA_InitText(1,0);
PA_LoadSpritePal(0, 0, (void*)vaisseau_Pal);
PA_LoadSpritePal(0, 1, (void*)station01_Pal);
PA_CreateSprite(0, 0,(void*)vaisseau_Sprite, OBJ_SIZE_32X32,1, 0, 128-16, 96-16); // Das SChiff auf Mitte des unteren Screens setzen
PA_SetSpriteRotEnable(0,0,0);
u16 angle = 0;
int x = (128) << 8;
int y = (96) << 8;
int sx;
int sy;
typedef struct{
int x;
int xmax;
int schalter;
}pflanze;
pflanze buche;
buche.xmax=1000;
buche.schalter=0;
int scrollx = 0;
int scrolly = 0;
//Raumstation:
/////////////////////////////////////////////////
typedef struct{
int x;
int y;
int flag;
int entfx;
int entfy;
}station;
station rs;
//station fremd[10];//0-9
rs.x=200;
rs.y=96;
rs.flag=0;
rs.entfx;
rs.entfy;
void station01test(void){
rs.entfx=(sx>>8)-(rs.x);//Entfernung zwischen Station und Raumschiff messen
if (rs.entfx<0){rs.entfx=-rs.entfx;}//Betrag, falls Entfernung negativ!
rs.entfy=(sy>>8)-(rs.y);
if (rs.entfy<0){rs.entfy=-rs.entfy;}
if (rs.flag==0){
PA_CreateSprite(0, 2,(void*)station01_Sprite, OBJ_SIZE_64X64,1, 1, rs.x-16, rs.y-16);
rs.flag=1;
}
if ((rs.entfx>100)&&rs.flag==1){
PA_DeleteSprite (0, 2);
rs.flag=0;
}
if ((rs.entfy>100)&&rs.flag==1){
PA_DeleteSprite (0, 2);
rs.flag=0;
}
if ((rs.entfx<30)&&(rs.entfy<30)){
PA_OutputText(1,0,2,"'START' zum Landen-");
}
if ((rs.entfx>30)||(rs.entfy>30)){
PA_OutputText(1,0,2," ");
}
//STATUSBILDSCHIRM
//////////////////////////////////////////////////////////////////
void statusscreen(void){
//Ausgabe von Informationen auf oberen Screen:
////////////////////////////////////////////////////////////////////////////////
PA_OutputText(1,0,12,"Map-x: %02d", scrollx>>8);
PA_OutputText(1,0,13,"Map-y: %02d", scrolly>>8);
PA_OutputText(1,0,14,"-------------------");
PA_OutputText(1,0,15,"Schiff-x: %02d", sx>>8);
PA_OutputText(1,0,16,"Schiff-y: %02d", sy>>8);
PA_OutputText(1,0,17,"-------------------");
PA_OutputText(1,0,18,"x von Station entfernt: %02d", rs.entfx);
PA_OutputText(1,0,19,"y von Station entfernt: %02d", rs.entfy);
PA_OutputText(1,0,20,"Winkel des Schiffes: %02d", angle);
}
//MAIN:
////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////
while (1)
{
//Test-Buche: zählt von 0 bis 1000, wenn "A" gedrückt wird
if (Pad.Newpress.A) buche.schalter=1;
wachse();
PA_OutputText(1,0,0,"%02d", buche.x);
-edit- Yeah, like Boogyman said this is for C#. Sorry i skipped over your code and thought you where asking help for C#.
You could just code the station like you always do. Just make a class for it and give it attributes. It should probably have a owner attribute and a location attribute too.
When a player buys it you instantiate the class and maybe put it in a list.
class Station
{
public int health { get; private set; }
public int ownerID { get; private set; }
public Vector2 location { get; private set; }
public Station(int stationType, int ownerID, Vector2 location)
{
if (stationType == 1)
{
this.health = 500;
}
else if (stationType == 2)
{
this.health = 750;
}
this.ownerID = ownerID;
this.location = location;
}
}
When your player buys a station do something like this.
Station newstation = new Station(stationType, playerID, location);
//offcourse these variables need to get filled.
I believe the language in question is C, not C#, alas, the new keyword is non existent, nor are constructors.
To the OP, I take it you have not yet covered dynamic memory. If you have not, you can always create an array of stations (if you haven't learned about arrays, I guess you can create a "StationManager" struct and put however many stations you want) and each station could contain a variable rather it's activated or not (this will be very painful to code. It will be much easier if you use arrays). This little hack should allow you to do what you want, but you should probably limit your use of it to this program only Besides, this setup is limited to a static number of stations.
Of course, the best solution is to use malloc() and free() to create them during execution. I don't know why I didn't mention that.
Make a struct to represent the stations data, use the malloc function to get a pointer to a new instance. You should call the free() function with this pointer when your'e done with it.
this malloc function sounds very good, but it seems like i need to understand a bit more about this and also pointers.
So i made now a struct for the stations i want to buy:
typedef struct{
int id;
int x;
int y;
int flag;
int entfx;
int entfy;
}ownstation;
ownstation neu[10];
Is it correct to make an array now if i for example don´t want to have more than 10 stations?
then i have found following for this malloc:
char * String;
String = (char *) malloc(1000);
so if the code would be:
if (klicking on "buy"){
do what?
}
EDIT:
ownstation* neu(neu[10](int id[10]));
something like this maybe? (i know that it is not correct, but maybe i am on the right way)
If you don't want more than 10 stations, that code is what you want. If you want to use malloc to dynamically allocate an array of n ownstations then you want
ownstation* stations;
stations = (ownstation*) malloc(n*sizeof(ownstation))
before you use the array and free(stations) to release the memory once you are finished with it. To resize the array you want the following code:
ownstation* temp;
temp = (ownstation*) malloc(newlen*sizeof(ownstation));
memcpy(temp, stations, oldlen*sizeof(ownstation));
free(stations);
stations=temp
which will extend the length of the stations array from oldlen to newlen. If you want to make the array pointed to by stations to be shorter, simply replace oldlen with newlen.
The line
stations = (ownstation*) malloc(n*sizeof(ownstation));
allocates enough space for n ownstation structs. You replace n with however many ownstations you want in your array. With resizing, I just remembered that you can use the realloc function so you can just say stations = (ownstation*) realloc(stations,newlen); where newlen is the expression representing the length you wish to resize the array to.
Besides, this setup is limited to a static number of stations.
