1 files changed, 121 insertions, 0 deletions
diff --git a/shared/shared.h b/shared/shared.h
index e69de29..172438f 100644
--- a/shared/shared.h
+++ b/shared/shared.h
@@ -0,0 +1,121 @@
+#pragma once
+#include <time.h>
+#include <math.h>
+#include <stdbool.h>
+
+// inputs bitmask
+#define INPUT_FORWARD  (1 << 0)
+#define INPUT_BACK     (1 << 1)
+#define INPUT_LEFT     (1 << 2)
+#define INPUT_RIGHT    (1 << 3)
+#define INPUT_JUMP     (1 << 4)
+#define INPUT_SPRINT   (1 << 5)
+
+#define HZ 20.0
+#define NETWORK_RATE (1.0 / HZ)
+#define TICK_RATE    (1.0 / HZ)
+#define MAX_PLAYERS 16
+#define MAX_VIEW_NPCS 32
+#define MAX_NPCS 2000
+
+typedef struct {
+    float x;
+    float y;
+    float z;
+} Vec3;
+
+typedef enum {
+  PACKET_CLIENT_INPUT,
+  PACKET_SERVER_SNAPSHOT,
+  PACKET_PLAYER_JOINED,
+  PACKET_PLAYER_LEFT,
+  PACKET_HANDSHAKE,
+  PACKET_HANDSHAKE_RESPONSE,
+  PACKET_WORLD_EVENT,
+  PACKET_PING,
+  PACKET_PONG
+} PacketType;
+
+typedef struct {
+    PacketType type;
+    double sentTime;
+} PingPacket;
+
+// client → server
+typedef struct {
+    PacketType type;
+    int playerId;
+    int inputs;
+    float yaw;
+    float dt;
+    int characterClass;   // 0=warrior, 1=mage etc
+} ClientPacket;
+
+typedef struct {
+    PacketType type;
+    int playerId;
+    char name[32];
+    int characterClass;   // 0=warrior, 1=mage etc
+    Vec3 position;
+} PlayerJoinedPacket;
+
+// server → client (full world snapshot)
+typedef struct {
+    PacketType type;
+
+    int playerCount;
+    struct {
+        int id;
+        Vec3 position;
+      Vec3 velocity;  // add this
+      float yaw;
+      int animationState;
+      bool onGround;
+    } players[MAX_PLAYERS];
+
+    int npcCount;
+    struct {
+        int id;
+        Vec3 position;
+        float rotation;
+        int state;   // IDLE, WALKING, COMBAT
+        int health;
+        int scale;
+        int model;
+    } npcs[MAX_VIEW_NPCS];
+
+    int eventCount;
+    struct {
+        int objectId;
+        int eventType;  // OBJECT_REMOVED, DOOR_OPENED etc
+        Vec3 position;
+    } events[8];
+
+} ServerSnapshot;
+
+typedef struct {
+    PacketType type;
+    char name[32];
+    int characterClass;   // 0=warrior, 1=mage etc
+} HandshakePacket;
+
+typedef struct {
+    PacketType type;
+    int playerId;
+    float spawnX;
+    float spawnY;
+    float spawnZ;
+} HandshakeResponsePacket;
+
+static inline float Vec3Distance(Vec3 a, Vec3 b) {
+    float dx = a.x - b.x;
+    float dy = a.y - b.y;
+    float dz = a.z - b.z;
+    return sqrtf(dx*dx + dy*dy + dz*dz);
+}
+
+static inline double GetWallTime() {
+    struct timespec ts;
+    clock_gettime(CLOCK_MONOTONIC, &ts);
+    return ts.tv_sec + ts.tv_nsec / 1e9;
+}