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suicmez/game/server.c
Masashi 7fc4e9cd3c wider terrain
2025-12-18 21:55:51 +05:30

926 lines
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// game/server.c - SMOOTH TERRAIN VERSION
#include <math.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <time.h>
#include <ode/ode.h>
#ifdef _WIN32
#define WIN32_LEAN_AND_MEAN
#include <winsock2.h>
#include <ws2tcpip.h>
#pragma comment(lib, "ws2_32.lib")
typedef int socklen_t;
#define CLOSESOCK closesocket
#else
#include <arpa/inet.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/socket.h>
#include <unistd.h>
#define CLOSESOCK close
#endif
#define PROTOCOL_VERSION 67
#define SERVER_PORT 27015
#define MAX_PLAYERS 16
#define USERNAME_MAX 16
#define TICK_HZ 30
#define DT (1.0f / (float)TICK_HZ)
#define WEAPON_PISTOL 0
#define WEAPON_RIFLE 1
#define MAX_ITEMS 64
#define ITEM_NONE 0
#define ITEM_MEDKIT 1
#define ITEM_AMMO_PISTOL 2
#define ITEM_AMMO_RIFLE 3
#define BTN_RELOAD (1u << 0)
#define BTN_SWITCH_PISTOL (1u << 1)
#define BTN_SWITCH_RIFLE (1u << 2)
#define BTN_PICK (1u << 3)
#define BTN_USE_MEDKIT (1u << 4)
#define BTN_JUMP (1u << 5)
#define CAT_WORLD (1u << 0)
#define CAT_PLAYER (1u << 1)
#define CAT_ITEM (1u << 2)
// ============== SIMPLEX NOISE ==============
static const uint8_t perm[512] = {
151, 160, 137, 91, 90, 15, 131, 13, 201, 95, 96, 53, 194, 233, 7,
225, 140, 36, 103, 30, 69, 142, 8, 99, 37, 240, 21, 10, 23, 190,
6, 148, 247, 120, 234, 75, 0, 26, 197, 62, 94, 252, 219, 203, 117,
35, 11, 32, 57, 177, 33, 88, 237, 149, 56, 87, 174, 20, 125, 136,
171, 168, 68, 175, 74, 165, 71, 134, 139, 48, 27, 166, 77, 146, 158,
231, 83, 111, 229, 122, 60, 211, 133, 230, 220, 105, 92, 41, 55, 46,
245, 40, 244, 102, 143, 54, 65, 25, 63, 161, 1, 216, 80, 73, 209,
76, 132, 187, 208, 89, 18, 169, 200, 196, 135, 130, 116, 188, 159, 86,
164, 100, 109, 198, 173, 186, 3, 64, 52, 217, 226, 250, 124, 123, 5,
202, 38, 147, 118, 126, 255, 82, 85, 212, 207, 206, 59, 227, 47, 16,
58, 17, 182, 189, 28, 42, 223, 183, 170, 213, 119, 248, 152, 2, 44,
154, 163, 70, 221, 153, 101, 155, 167, 43, 172, 9, 129, 22, 39, 253,
19, 98, 108, 110, 79, 113, 224, 232, 178, 185, 112, 104, 218, 246, 97,
228, 251, 34, 242, 193, 238, 210, 144, 12, 191, 179, 162, 241, 81, 51,
145, 235, 249, 14, 239, 107, 49, 192, 214, 31, 181, 199, 106, 157, 184,
84, 204, 176, 115, 121, 50, 45, 127, 4, 150, 254, 138, 236, 205, 93,
222, 114, 67, 29, 24, 72, 243, 141, 128, 195, 78, 66, 215, 61, 156,
180, 151, 160, 137, 91, 90, 15, 131, 13, 201, 95, 96, 53, 194, 233,
7, 225, 140, 36, 103, 30, 69, 142, 8, 99, 37, 240, 21, 10, 23,
190, 6, 148, 247, 120, 234, 75, 0, 26, 197, 62, 94, 252, 219, 203,
117, 35, 11, 32, 57, 177, 33, 88, 237, 149, 56, 87, 174, 20, 125,
136, 171, 168, 68, 175, 74, 165, 71, 134, 139, 48, 27, 166, 77, 146,
158, 231, 83, 111, 229, 122, 60, 211, 133, 230, 220, 105, 92, 41, 55,
46, 245, 40, 244, 102, 143, 54, 65, 25, 63, 161, 1, 216, 80, 73,
209, 76, 132, 187, 208, 89, 18, 169, 200, 196, 135, 130, 116, 188, 159,
86, 164, 100, 109, 198, 173, 186, 3, 64, 52, 217, 226, 250, 124, 123,
5, 202, 38, 147, 118, 126, 255, 82, 85, 212, 207, 206, 59, 227, 47,
16, 58, 17, 182, 189, 28, 42, 223, 183, 170, 213, 119, 248, 152, 2,
44, 154, 163, 70, 221, 153, 101, 155, 167, 43, 172, 9, 129, 22, 39,
253, 19, 98, 108, 110, 79, 113, 224, 232, 178, 185, 112, 104, 218, 246,
97, 228, 251, 34, 242, 193, 238, 210, 144, 12, 191, 179, 162, 241, 81,
51, 145, 235, 249, 14, 239, 107, 49, 192, 214, 31, 181, 199, 106, 157,
184, 84, 204, 176, 115, 121, 50, 45, 127, 4, 150, 254, 138, 236, 205,
93, 222, 114, 67, 29, 24, 72, 243, 141, 128, 195, 78, 66, 215, 61,
156, 180};
static float grad2(int hash, float x, float y) {
int h = hash & 7;
float u = h < 4 ? x : y;
float v = h < 4 ? y : x;
return ((h & 1) ? -u : u) + ((h & 2) ? -2.0f * v : 2.0f * v);
}
static float simplex_noise_2d(float x, float y) {
const float F2 = 0.366025403f;
const float G2 = 0.211324865f;
float s = (x + y) * F2;
int i = (int)floorf(x + s);
int j = (int)floorf(y + s);
float t = (i + j) * G2;
float X0 = i - t, Y0 = j - t;
float x0 = x - X0, y0 = y - Y0;
int i1 = (x0 > y0) ? 1 : 0;
int j1 = (x0 > y0) ? 0 : 1;
float x1 = x0 - i1 + G2, y1 = y0 - j1 + G2;
float x2 = x0 - 1.0f + 2.0f * G2, y2 = y0 - 1.0f + 2.0f * G2;
int ii = i & 255, jj = j & 255;
float n0 = 0.0f, n1 = 0.0f, n2 = 0.0f;
float t0 = 0.5f - x0 * x0 - y0 * y0;
if (t0 >= 0.0f) {
t0 *= t0;
n0 = t0 * t0 * grad2(perm[ii + perm[jj]], x0, y0);
}
float t1 = 0.5f - x1 * x1 - y1 * y1;
if (t1 >= 0.0f) {
t1 *= t1;
n1 = t1 * t1 * grad2(perm[ii + i1 + perm[jj + j1]], x1, y1);
}
float t2 = 0.5f - x2 * x2 - y2 * y2;
if (t2 >= 0.0f) {
t2 *= t2;
n2 = t2 * t2 * grad2(perm[ii + 1 + perm[jj + 1]], x2, y2);
}
return 45.0f * (n0 + n1 + n2);
}
static float fbm_noise(float x, float y, int octaves) {
float value = 0.0f, amplitude = 1.0f, frequency = 1.0f, max_value = 0.0f;
for (int i = 0; i < octaves; i++) {
value += simplex_noise_2d(x * frequency, y * frequency) * amplitude;
max_value += amplitude;
amplitude *= 0.5f;
frequency *= 2.0f;
}
return value / max_value;
}
float get_terrain_height(float x, float z) {
float height = fbm_noise(x * 0.03f, z * 0.03f, 4);
height += fbm_noise(x * 0.01f, z * 0.01f, 2) * 1.5f;
return height * 5.0f + 2.0f;
}
#define TERRAIN_SIZE 256
#define TERRAIN_SCALE 1.0f
static dReal *gHeightData = NULL;
static dGeomID gTerrainGeom = NULL;
static void generate_smooth_terrain(void) {
int size = TERRAIN_SIZE;
gHeightData = (dReal *)malloc(size * size * sizeof(dReal));
for (int z = 0; z < size; z++) {
for (int x = 0; x < size; x++) {
float wx = ((float)x - size / 2.0f) * TERRAIN_SCALE;
float wz = ((float)z - size / 2.0f) * TERRAIN_SCALE;
gHeightData[z * size + x] = (dReal)get_terrain_height(wx, wz);
}
}
printf("Generated smooth heightmap terrain %dx%d\n", size, size);
}
// ============== END SIMPLEX NOISE ==============
static double now_seconds(void) {
#ifdef _WIN32
static LARGE_INTEGER freq;
static int init = 0;
LARGE_INTEGER t;
if (!init) {
QueryPerformanceFrequency(&freq);
init = 1;
}
QueryPerformanceCounter(&t);
return (double)t.QuadPart / (double)freq.QuadPart;
#else
struct timespec ts;
clock_gettime(CLOCK_MONOTONIC, &ts);
return (double)ts.tv_sec + (double)ts.tv_nsec / 1e9;
#endif
}
static void set_nonblocking(int sock) {
#ifdef _WIN32
u_long mode = 1;
ioctlsocket(sock, FIONBIO, &mode);
#else
int flags = fcntl(sock, F_GETFL, 0);
fcntl(sock, F_SETFL, flags | O_NONBLOCK);
#endif
}
#pragma pack(push, 1)
typedef enum MsgType : uint8_t {
MSG_HELLO = 1,
MSG_WELCOME = 2,
MSG_INPUT = 3,
MSG_SNAPSHOT = 4,
MSG_SHOOT = 5,
MSG_ITEMS = 6
} MsgType;
typedef struct MsgHello {
uint8_t type;
uint32_t protocol;
char username[USERNAME_MAX];
} MsgHello;
typedef struct MsgWelcome {
uint8_t type;
uint8_t playerId;
uint32_t serverTick;
} MsgWelcome;
typedef struct MsgInput {
uint8_t type;
uint8_t playerId;
uint32_t clientTick;
float moveX, moveZ, yaw, pitch;
uint8_t buttons;
} MsgInput;
typedef struct MsgShoot {
uint8_t type;
uint8_t playerId;
uint32_t clientTick;
} MsgShoot;
typedef struct PlayerStateNet {
uint8_t id, alive;
int16_t hp;
float x, y, z, yaw, pitch;
uint8_t weapon;
int16_t pistolMag, rifleMag, pistolAmmo, rifleAmmo, medkits;
int16_t reloadTimeLeft;
char username[USERNAME_MAX];
} PlayerStateNet;
typedef struct MsgSnapshot {
uint8_t type;
uint32_t serverTick;
uint8_t count;
PlayerStateNet p[MAX_PLAYERS];
} MsgSnapshot;
typedef struct ItemNet {
uint16_t id;
uint8_t type;
int16_t qty;
float x, y, z;
} ItemNet;
typedef struct MsgItems {
uint8_t type;
uint32_t serverTick;
uint8_t count;
ItemNet items[MAX_ITEMS];
} MsgItems;
#pragma pack(pop)
typedef struct Item {
int active;
uint16_t id;
uint8_t type;
int qty;
float x, y, z;
dGeomID geom;
} Item;
typedef struct Player {
int inUse;
struct sockaddr_in addr;
double lastHeard;
char username[USERNAME_MAX];
float moveX, moveZ, yaw, pitch;
int alive, hp, weapon;
int pistolMag, rifleMag, pistolAmmo, rifleAmmo, medkits;
double lastShotTime;
int shotsInBurst;
uint32_t rng;
float reloadTimer;
int reloadWeapon;
dBodyID body;
dGeomID geom;
} Player;
static int addr_equal(const struct sockaddr_in *a,
const struct sockaddr_in *b) {
return (a->sin_family == b->sin_family) && (a->sin_port == b->sin_port) &&
(a->sin_addr.s_addr == b->sin_addr.s_addr);
}
static float clampf(float v, float lo, float hi) {
return (v < lo) ? lo : (v > hi) ? hi : v;
}
static void sendto_player(int sock, const Player *pl, const void *data,
int len) {
sendto(sock, (const char *)data, len, 0, (const struct sockaddr *)&pl->addr,
sizeof(pl->addr));
}
static void broadcast(int sock, const Player players[MAX_PLAYERS],
const void *data, int len) {
for (int i = 0; i < MAX_PLAYERS; i++)
if (players[i].inUse)
sendto_player(sock, &players[i], data, len);
}
static dWorldID gWorld;
static dSpaceID gSpace;
static dJointGroupID gContactGroup;
static Item gItems[MAX_ITEMS];
static uint16_t gNextItemId = 1;
static void item_destroy(Item *it) {
if (it->geom) {
dGeomDestroy(it->geom);
it->geom = 0;
}
memset(it, 0, sizeof(*it));
}
static int item_spawn(uint8_t type, int qty, float x, float z) {
float y = get_terrain_height(x, z) + 0.5f;
for (int i = 0; i < MAX_ITEMS; i++) {
if (!gItems[i].active) {
Item *it = &gItems[i];
it->active = 1;
it->id = gNextItemId++;
it->type = type;
it->qty = qty;
it->x = x;
it->y = y;
it->z = z;
it->geom = dCreateSphere(gSpace, 0.30);
dGeomSetPosition(it->geom, x, y, z);
dGeomSetCategoryBits(it->geom, CAT_ITEM);
dGeomSetCollideBits(it->geom, 0);
dGeomSetData(it->geom, it);
return i;
}
}
return -1;
}
static void nearCallback(void *user, dGeomID o1, dGeomID o2) {
(void)user;
if (dGeomIsSpace(o1) || dGeomIsSpace(o2)) {
dSpaceCollide2(o1, o2, user, &nearCallback);
return;
}
unsigned long c1 = dGeomGetCategoryBits(o1);
unsigned long c2 = dGeomGetCategoryBits(o2);
if ((c1 & CAT_ITEM) || (c2 & CAT_ITEM))
return;
const int MAXC = 8;
dContact c[MAXC];
int n = dCollide(o1, o2, MAXC, &c[0].geom, sizeof(dContact));
for (int i = 0; i < n; i++) {
c[i].surface.mode = dContactApprox1;
c[i].surface.mu = 1.5;
c[i].surface.bounce = 0.0;
dJointID j = dJointCreateContact(gWorld, gContactGroup, &c[i]);
dJointAttach(j, dGeomGetBody(o1), dGeomGetBody(o2));
}
}
static void ode_init_world(void) {
dInitODE();
gWorld = dWorldCreate();
gSpace = dHashSpaceCreate(0);
gContactGroup = dJointGroupCreate(0);
dWorldSetGravity(gWorld, 0, -20.0, 0);
dWorldSetERP(gWorld, 0.2);
dWorldSetCFM(gWorld, 1e-5);
generate_smooth_terrain();
dHeightfieldDataID hfData = dGeomHeightfieldDataCreate();
dGeomHeightfieldDataBuildDouble(hfData, gHeightData, 0,
TERRAIN_SCALE * TERRAIN_SIZE,
TERRAIN_SCALE * TERRAIN_SIZE, TERRAIN_SIZE,
TERRAIN_SIZE, 1.0, 0.0, 0.0, 0);
dGeomHeightfieldDataSetBounds(hfData, -10.0, 20.0);
gTerrainGeom = dCreateHeightfield(gSpace, hfData, 1);
dGeomSetPosition(gTerrainGeom, 0, 0, 0);
dGeomSetCategoryBits(gTerrainGeom, CAT_WORLD);
dGeomSetCollideBits(gTerrainGeom, CAT_PLAYER);
item_spawn(ITEM_MEDKIT, 1, 10.0f, 10.0f);
item_spawn(ITEM_MEDKIT, 1, -15.0f, 20.0f);
item_spawn(ITEM_AMMO_RIFLE, 30, 5.0f, -10.0f);
item_spawn(ITEM_AMMO_PISTOL, 12, -10.0f, -15.0f);
}
static void ode_shutdown_world(void) {
if (gHeightData) {
free(gHeightData);
gHeightData = NULL;
}
dJointGroupDestroy(gContactGroup);
dSpaceDestroy(gSpace);
dWorldDestroy(gWorld);
dCloseODE();
}
static void player_ode_create(Player *p, int spawnIndex) {
p->body = dBodyCreate(gWorld);
dMass m;
dMassSetCapsuleTotal(&m, 80.0, 3, 0.35, 1.0);
dBodySetMass(p->body, &m);
dBodySetLinearDamping(p->body, 0.05);
dBodySetAngularDamping(p->body, 0.99);
float sx = (float)(spawnIndex * 4 - 8);
float sz = (float)(spawnIndex * 3 - 6);
float sy = get_terrain_height(sx, sz) + 3.0f;
dBodySetPosition(p->body, sx, sy, sz);
p->geom = dCreateCapsule(gSpace, 0.35, 1.0);
dGeomSetBody(p->geom, p->body);
dGeomSetCategoryBits(p->geom, CAT_PLAYER);
dGeomSetCollideBits(p->geom, CAT_WORLD | CAT_PLAYER);
}
static void player_ode_destroy(Player *p) {
if (p->geom) {
dGeomDestroy(p->geom);
p->geom = 0;
}
if (p->body) {
dBodyDestroy(p->body);
p->body = 0;
}
}
typedef struct RaycastCtx {
dGeomID ray, hitGeom;
dContactGeom hit;
int hasHit;
} RaycastCtx;
static void rayCallback(void *data, dGeomID o1, dGeomID o2) {
RaycastCtx *rc = (RaycastCtx *)data;
dGeomID ray = rc->ray;
dGeomID other = (o1 == ray) ? o2 : o1;
if (other == ray)
return;
dContact c[4];
int n = dCollide(ray, other, 4, &c[0].geom, sizeof(dContact));
for (int i = 0; i < n; i++) {
if (!rc->hasHit || c[i].geom.depth < rc->hit.depth) {
rc->hasHit = 1;
rc->hit = c[i].geom;
rc->hitGeom = other;
}
}
}
static int raycast_space(float ox, float oy, float oz, float dx, float dy,
float dz, float maxDist, dContactGeom *outHit,
dGeomID *outGeom) {
dGeomID ray = dCreateRay(0, maxDist);
dGeomRaySet(ray, ox, oy, oz, dx, dy, dz);
dGeomSetCategoryBits(ray, 0xFFFFFFFFu);
dGeomSetCollideBits(ray, CAT_WORLD | CAT_PLAYER);
RaycastCtx rc = {0};
rc.ray = ray;
dSpaceCollide2(ray, (dGeomID)gSpace, &rc, &rayCallback);
dGeomDestroy(ray);
if (!rc.hasHit)
return 0;
if (outHit)
*outHit = rc.hit;
if (outGeom)
*outGeom = rc.hitGeom;
return 1;
}
static uint32_t xorshift32(uint32_t *s) {
uint32_t x = *s;
x ^= x << 13;
x ^= x >> 17;
x ^= x << 5;
*s = x;
return x;
}
static float frand_signed(uint32_t *s) {
return ((xorshift32(s) & 0xFFFFFF) / (float)0x7FFFFF) - 1.0f;
}
static void dir_from_yaw_pitch(float yaw, float pitch, float *dx, float *dy,
float *dz) {
*dx = sinf(yaw) * cosf(pitch);
*dy = sinf(pitch);
*dz = cosf(yaw) * cosf(pitch);
}
static void v3_cross(float ax, float ay, float az, float bx, float by, float bz,
float *ox, float *oy, float *oz) {
*ox = ay * bz - az * by;
*oy = az * bx - ax * bz;
*oz = ax * by - ay * bx;
}
static void v3_normf(float *x, float *y, float *z) {
float l = sqrtf((*x) * (*x) + (*y) * (*y) + (*z) * (*z));
if (l < 1e-6f) {
*x = 0;
*y = 0;
*z = 1;
return;
}
*x /= l;
*y /= l;
*z /= l;
}
static int find_nearest_item(float x, float y, float z, float maxDist) {
int best = -1;
float bestD2 = maxDist * maxDist;
for (int i = 0; i < MAX_ITEMS; i++) {
if (!gItems[i].active)
continue;
float dx = gItems[i].x - x;
float dy = (gItems[i].y) - y;
float dz = gItems[i].z - z;
float d2 = dx * dx + dy * dy + dz * dz;
if (d2 < bestD2) {
bestD2 = d2;
best = i;
}
}
return best;
}
int main(void) {
#ifdef _WIN32
WSADATA wsa;
WSAStartup(MAKEWORD(2, 2), &wsa);
#endif
ode_init_world();
int sock = (int)socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
if (sock < 0) {
perror("socket");
return 1;
}
set_nonblocking(sock);
struct sockaddr_in srv = {0};
srv.sin_family = AF_INET;
srv.sin_addr.s_addr = htonl(INADDR_ANY);
srv.sin_port = htons(SERVER_PORT);
if (bind(sock, (struct sockaddr *)&srv, sizeof(srv)) < 0) {
perror("bind");
CLOSESOCK(sock);
return 1;
}
Player players[MAX_PLAYERS] = {0};
uint32_t serverTick = 0, itemsTickDiv = 0;
printf("Server listening UDP %d\n", SERVER_PORT);
double nextTick = now_seconds();
for (;;) {
for (;;) {
uint8_t buf[1400];
struct sockaddr_in from = {0};
socklen_t fromLen = sizeof(from);
int n = (int)recvfrom(sock, (char *)buf, (int)sizeof(buf), 0,
(struct sockaddr *)&from, &fromLen);
if (n <= 0) {
#ifdef _WIN32
if (WSAGetLastError() == WSAEWOULDBLOCK)
break;
#else
if (errno == EWOULDBLOCK || errno == EAGAIN)
break;
#endif
break;
}
uint8_t type = buf[0];
int pid = -1;
for (int i = 0; i < MAX_PLAYERS; i++) {
if (players[i].inUse && addr_equal(&players[i].addr, &from)) {
pid = i;
break;
}
}
if (type == MSG_HELLO && n >= (int)sizeof(MsgHello)) {
const MsgHello *m = (const MsgHello *)buf;
if (m->protocol != PROTOCOL_VERSION)
continue;
if (pid < 0) {
for (int i = 0; i < MAX_PLAYERS; i++)
if (!players[i].inUse) {
pid = i;
Player *p = &players[i];
memset(p, 0, sizeof(*p));
p->inUse = 1;
p->addr = from;
p->lastHeard = now_seconds();
strncpy(p->username, m->username, USERNAME_MAX - 1);
p->alive = 1;
p->hp = 100;
p->weapon = WEAPON_RIFLE;
p->pistolMag = 12;
p->rifleMag = 30;
p->pistolAmmo = 48;
p->rifleAmmo = 90;
p->medkits = 2;
p->rng = 0xA341316Cu ^ (uint32_t)(i * 2654435761u);
player_ode_create(p, i);
printf("Player %d joined as '%s'\n", pid, p->username);
break;
}
} else {
players[pid].lastHeard = now_seconds();
}
if (pid >= 0) {
MsgWelcome w = {0};
w.type = MSG_WELCOME;
w.playerId = (uint8_t)pid;
w.serverTick = serverTick;
sendto(sock, (const char *)&w, (int)sizeof(w), 0,
(struct sockaddr *)&from, sizeof(from));
}
} else if (type == MSG_INPUT && n >= (int)sizeof(MsgInput)) {
const MsgInput *m = (const MsgInput *)buf;
if (pid >= 0 && m->playerId == (uint8_t)pid) {
Player *p = &players[pid];
p->lastHeard = now_seconds();
p->moveX = clampf(m->moveX, -1.0f, 1.0f);
p->moveZ = clampf(m->moveZ, -1.0f, 1.0f);
p->yaw = m->yaw;
p->pitch = clampf(m->pitch, -1.5f, 1.5f);
if (m->buttons & BTN_SWITCH_PISTOL)
p->weapon = WEAPON_PISTOL;
if (m->buttons & BTN_SWITCH_RIFLE)
p->weapon = WEAPON_RIFLE;
if (m->buttons & BTN_RELOAD) {
if (p->reloadTimer <= 0.0f) {
p->reloadTimer = 2.0f; // 2 second reload time
p->reloadWeapon = p->weapon;
}
}
if (m->buttons & BTN_PICK) {
const dReal *pos = dBodyGetPosition(p->body);
int itIdx = find_nearest_item((float)pos[0], (float)pos[1],
(float)pos[2], 2.0f);
if (itIdx >= 0) {
Item *it = &gItems[itIdx];
int taken = 0;
if (it->type == ITEM_AMMO_PISTOL) {
p->pistolAmmo += it->qty;
if (p->pistolAmmo > 120)
p->pistolAmmo = 120;
taken = 1;
} else if (it->type == ITEM_AMMO_RIFLE) {
p->rifleAmmo += it->qty;
if (p->rifleAmmo > 300)
p->rifleAmmo = 300;
taken = 1;
} else if (it->type == ITEM_MEDKIT) {
p->medkits += it->qty;
if (p->medkits > 10)
p->medkits = 10;
taken = 1;
}
if (taken)
item_destroy(it);
}
}
if (m->buttons & BTN_USE_MEDKIT) {
if (p->medkits > 0 && p->hp < 100) {
p->medkits--;
p->hp += 25;
if (p->hp > 100)
p->hp = 100;
}
}
if (m->buttons & BTN_JUMP) {
const dReal *lvel = dBodyGetLinearVel(p->body);
dBodySetLinearVel(p->body, lvel[0], 12.0f,
lvel[2]); // Set upward velocity
printf("Player %d jumped\n", pid);
}
}
} else if (type == MSG_SHOOT && n >= (int)sizeof(MsgShoot)) {
const MsgShoot *m = (const MsgShoot *)buf;
if (pid >= 0 && m->playerId == (uint8_t)pid && players[pid].inUse &&
players[pid].alive) {
Player *sh = &players[pid];
const double now = now_seconds();
double fireInterval =
(sh->weapon == WEAPON_PISTOL) ? (1.0 / 4.0) : (1.0 / 12.0);
if (now - sh->lastShotTime < fireInterval)
continue;
if (now - sh->lastShotTime > 0.18)
sh->shotsInBurst = 0;
if (sh->reloadTimer > 0.0f)
continue;
int *mag =
(sh->weapon == WEAPON_PISTOL) ? &sh->pistolMag : &sh->rifleMag;
if (*mag <= 0)
continue;
(*mag)--;
sh->shotsInBurst++;
sh->lastShotTime = now;
const dReal *pos = dBodyGetPosition(sh->body);
float ox = (float)pos[0], oy = (float)pos[1] + 0.7f,
oz = (float)pos[2];
float fx, fy, fz;
dir_from_yaw_pitch(sh->yaw, sh->pitch, &fx, &fy, &fz);
v3_normf(&fx, &fy, &fz);
float base = (sh->weapon == WEAPON_PISTOL) ? 0.0035f : 0.0080f;
float grow = (sh->weapon == WEAPON_PISTOL) ? 0.0010f : 0.0025f;
float spread = base + grow * (float)sh->shotsInBurst;
if (spread > 0.08f)
spread = 0.08f;
float upx = 0, upy = 1, upz = 0;
float rx, ry, rz;
v3_cross(fx, fy, fz, upx, upy, upz, &rx, &ry, &rz);
v3_normf(&rx, &ry, &rz);
float ux, uy, uz;
v3_cross(rx, ry, rz, fx, fy, fz, &ux, &uy, &uz);
v3_normf(&ux, &uy, &uz);
float ax = frand_signed(&sh->rng) * spread;
float ay = frand_signed(&sh->rng) * spread;
float dx = fx + rx * ax + ux * ay;
float dy = fy + ry * ax + uy * ay;
float dz = fz + rz * ax + uz * ay;
v3_normf(&dx, &dy, &dz);
dContactGeom hit;
dGeomID hitGeom = 0;
if (raycast_space(ox, oy, oz, dx, dy, dz, 100.0f, &hit, &hitGeom)) {
int victim = -1;
for (int i = 0; i < MAX_PLAYERS; i++) {
if (!players[i].inUse)
continue;
if (players[i].geom == hitGeom) {
victim = i;
break;
}
}
if (victim >= 0 && victim != pid && players[victim].alive) {
int dmg = 25;
players[victim].hp -= dmg;
if (players[victim].hp <= 0) {
players[victim].hp = 0;
players[victim].alive = 0;
}
}
}
}
}
}
double t = now_seconds();
if (t >= nextTick) {
nextTick += DT;
serverTick++;
dSpaceCollide(gSpace, 0, &nearCallback);
dWorldQuickStep(gWorld, DT);
dJointGroupEmpty(gContactGroup);
// Handle reload timers
for (int i = 0; i < MAX_PLAYERS; i++) {
Player *p = &players[i];
if (!p->inUse || !p->alive)
continue;
if (p->reloadTimer > 0.0f) {
p->reloadTimer -= DT;
if (p->reloadTimer <= 0.0f) {
p->reloadTimer = 0.0f;
// Perform reload
if (p->reloadWeapon == WEAPON_PISTOL) {
int need = 12 - p->pistolMag;
if (need > 0 && p->pistolAmmo > 0) {
int take = (p->pistolAmmo < need) ? p->pistolAmmo : need;
p->pistolAmmo -= take;
p->pistolMag += take;
}
} else {
int need = 30 - p->rifleMag;
if (need > 0 && p->rifleAmmo > 0) {
int take = (p->rifleAmmo < need) ? p->rifleAmmo : need;
p->rifleAmmo -= take;
p->rifleMag += take;
}
}
}
}
}
for (int i = 0; i < MAX_PLAYERS; i++) {
Player *p = &players[i];
if (!p->inUse || !p->alive)
continue;
const dReal *lvel = dBodyGetLinearVel(p->body);
const dReal *avel = dBodyGetAngularVel(p->body);
float dx = p->moveX, dz = p->moveZ;
float len = sqrtf(dx * dx + dz * dz);
if (len > 1e-6f) {
dx /= len;
dz /= len;
}
float speed = 10.0f;
float fx = sinf(p->yaw) * dz - cosf(p->yaw) * dx;
float fz = cosf(p->yaw) * dz + sinf(p->yaw) * dx;
dBodySetLinearVel(p->body, fx * speed, lvel[1], fz * speed);
dBodySetAngularVel(p->body, avel[0], 0, avel[2]);
}
MsgSnapshot snap = {0};
snap.type = MSG_SNAPSHOT;
snap.serverTick = serverTick;
snap.count = 0;
for (int i = 0; i < MAX_PLAYERS; i++) {
if (!players[i].inUse)
continue;
const dReal *pos = dBodyGetPosition(players[i].body);
PlayerStateNet *ps = &snap.p[snap.count++];
ps->id = (uint8_t)i;
ps->alive = players[i].alive;
ps->hp = (int16_t)players[i].hp;
ps->x = (float)pos[0];
ps->y = (float)pos[1];
ps->z = (float)pos[2];
ps->yaw = players[i].yaw;
ps->pitch = players[i].pitch;
ps->weapon = players[i].weapon;
ps->pistolMag = (int16_t)players[i].pistolMag;
ps->rifleMag = (int16_t)players[i].rifleMag;
ps->pistolAmmo = (int16_t)players[i].pistolAmmo;
ps->rifleAmmo = (int16_t)players[i].rifleAmmo;
ps->medkits = (int16_t)players[i].medkits;
ps->reloadTimeLeft = (int16_t)(players[i].reloadTimer * 1000.0f);
strncpy(ps->username, players[i].username, USERNAME_MAX - 1);
}
broadcast(sock, players, &snap, (int)sizeof(snap));
itemsTickDiv++;
if (itemsTickDiv >= 6) {
itemsTickDiv = 0;
MsgItems im = {0};
im.type = MSG_ITEMS;
im.serverTick = serverTick;
im.count = 0;
for (int i = 0; i < MAX_ITEMS; i++) {
if (!gItems[i].active)
continue;
ItemNet *it = &im.items[im.count++];
it->id = gItems[i].id;
it->type = gItems[i].type;
it->qty = (int16_t)gItems[i].qty;
it->x = gItems[i].x;
it->y = gItems[i].y;
it->z = gItems[i].z;
}
broadcast(sock, players, &im, (int)sizeof(im));
}
}
double now = now_seconds();
for (int i = 0; i < MAX_PLAYERS; i++) {
if (players[i].inUse && (now - players[i].lastHeard) > 10.0) {
printf("Player %d timed out\n", i);
player_ode_destroy(&players[i]);
memset(&players[i], 0, sizeof(Player));
}
}
double wait = nextTick - now_seconds();
if (wait > 0.0) {
#ifdef _WIN32
Sleep((DWORD)(wait * 1000.0));
#else
usleep((useconds_t)(wait * 1e6));
#endif
}
}
CLOSESOCK(sock);
ode_shutdown_world();
#ifdef _WIN32
WSACleanup();
#endif
return 0;
}
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