memory loss, leak or something?
Author
Hi people,
I seem to be having troubles with my coding, compiler, memory or something, because it keeps forgetting values and reseting them to 0
For example:
player_state *ps = &sv.clients[n].ps;
vec2 *speed = &ps->speed;
(where player_state contains all game related data on a client, and vec2 just has x and y)
The values speed->x and speed->y are fine at that point, but a couple of lines later speed->x is reset to 0, as well as ps->acc.
Theres nothing inbetween that should be making a difference, and this isnt the only place that my pc seemingly losses interest in what I want it to remember.
It was working fine, till I changed something.. but that was in a different area of the game so not exactly sure when the problem started.
Am I just overlooking something here, or is something up?
cheers
if the "different area of the game" still has access to that data, it is suspect. Are there any "if (ps->x = 0.0)" type statements? (note the "=" instead of the "==")
Post the entire function this is occurring in, as well as the definition of sv and the code you use to initialize sv.clients.
If sv.clients is a std::vector, and the size of the vector changes, its contents can get reassigned to a different memory block, thereby invalidating your pointers. But yeah, post the definition and code and we'll have a better idea.
Author
The problem isnt just specific to this function, I did have some heat problems earilier..
The function (a lame attempt for a little touch of physics).
(guessing the tag to enter code..)
definition of sv
The function (a lame attempt for a little touch of physics).
(guessing the tag to enter code..)
void SV_MovePlayer(int n, int x, int y){ player_state *ps = &sv.clients[n].ps; vec2 *speed = &ps->speed; vec2 intersec, endintersec; float maxspeed = ps->maxSpeed; if (x != 0) { if (x == 1) { speed->x += ps->acc * P_SPEED * sv.frameTime; if (speed->x > maxspeed) speed->x = maxspeed; } if (x == -1) { speed->x -= ps->acc * P_SPEED * sv.frameTime; if (speed->x < -maxspeed) speed->x = -maxspeed; } } else { if (speed->x - ps->dec > 0) speed->x -= ps->dec * P_SPEED * sv.frameTime; else if (speed->x + ps->dec < 0) speed->x += ps->dec * P_SPEED * sv.frameTime; else speed->x = 0; } if (y != 0) { if (y == 1) { speed->y += ps->acc * P_SPEED * sv.frameTime; if (speed->y > maxspeed) speed->y = maxspeed; } if (y == -1) { speed->y -= ps->acc * P_SPEED * sv.frameTime; if (speed->y < -maxspeed) speed->y = -maxspeed; } } else { if (speed->y - ps->dec > 0) speed->y -= ps->dec * P_SPEED * sv.frameTime; else if (speed->y + ps->dec < 0) speed->y += ps->dec * P_SPEED * sv.frameTime; else speed->y = 0; } //stop them moving off the playing field. if(ps->pos.x + speed->x < 0 || ps->pos.x + ps->dim.x + speed->x > map.dim.x) speed->x = 0; if(ps->pos.y + speed->y < 0 || ps->pos.y + ps->dim.y + speed->y > map.dim.y) speed->y = 0; ps->pos.x += speed->x * sv.frameTime; ps->pos.y += speed->y * sv.frameTime; vec2 *mid = &ps->mid; mid->x = ps->pos.x + ps->dim.x/2; mid->y = ps->pos.y + ps->dim.y/2; if(ps->turnType == TURN_MOUSE) ps->angle = (float)(M_AngleVec2(ps->mid, sv.clients[n].input.xhair) - (3.1415/2));}definition of sv
typedef struct{ sv_object objects[MAX_OBJECTS]; sv_client clients[MAX_CLIENTS]; prop props[MAX_PROPS]; team teams[MAX_TEAMS]; float time; float frameTime; float lastFrame; int clientCount; int frame; int lastActiveObj;}sv_local;
Author
oh, and to init sv.clients (called when a player connects)
and when the server is started:
void SV_BuildClient(){ int n = SV_NextClientSlot(); sv_client *client = &sv.clients[n]; client->obj = &sv.objects[n]; client->index = n; client->ps.clientnum = n; client->ps.speed = M_NewVec2(0,0); client->ps.acc = 1; client->ps.dec = 5; client->ps.dim.x = 24; client->ps.dim.y = 24; for(int i = 0; i < MAX_INV_SLOTS; i++) client->ps.inv.empty = true; client->ps.health = 100; client->ps.maxHealth = 100; client->ps.maxSpeed = 10; client->ps.respawnTime = 0; client->obj->frame = FRAME_PLAYER; client->ps.turnType = TURN_MOUSE; client->active = true;}and when the server is started:
void SV_InitClients(){ for(int n = 0; n < MAX_CLIENTS; n++) { sv.clients[n].active = false; sv.objects[n].team = 0; }}
Author
ok, the values seem to being reset after the first frame, which probably means there somewhere in my code thats reseting values (both client and server side)... so off i go to have a looksie :/
Keep in mind that you can use the debugger to place a watchpoint, that will pause the program when a specific memory location is changed. That could be very useful here.
Slightly offtopic, I know gdb can do conditional breakpoints and watch breaks like you describe, I've yet to figure out how to do that in VS6... ?
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