Add missile block

gamestate.c

@@ -40,6 +40,12 @@ static cpVect v2_to_cp(V2 v)
   return cpv(v.x, v.y);
 }
 
+bool is_burning(Entity *missile)
+{
+  assert(missile->is_missile);
+  return missile->time_burned_for < MISSILE_BURN_TIME;
+}
+
 bool was_entity_deleted(GameState *gs, EntityID id)
 {
   if (id.generation == 0)
@@ -87,11 +93,11 @@ bool is_cloaked(GameState *gs, Entity *e, Entity *this_players_perspective)
   bool cloaked = cloaking_active(gs, e);
   if (e->is_player)
   {
-    return cloaked && e->presenting_squad != this_players_perspective->presenting_squad;
+    return cloaked && e->owning_squad != this_players_perspective->owning_squad;
   }
   else
   {
-    return cloaked && this_players_perspective->presenting_squad != e->last_cloaked_by_squad;
+    return cloaked && this_players_perspective->owning_squad != e->last_cloaked_by_squad;
   }
 }
 
@@ -197,6 +203,75 @@ void box_remove_from_boxes(GameState *gs, Entity *box)
   box->prev_box = (EntityID){0};
 }
 
+V2 player_vel(GameState *gs, Entity *e);
+V2 entity_vel(GameState *gs, Entity *e)
+{
+  assert(e->is_box || e->is_player || e->is_grid || e->is_explosion);
+  if (e->is_box)
+    return box_vel(e);
+  if (e->is_player)
+    return player_vel(gs, e);
+  if (e->is_grid)
+    return grid_vel(e);
+  if (e->is_explosion)
+    return e->explosion_vel;
+  assert(false);
+  return (V2){0};
+}
+
+static THREADLOCAL float to_face = 0.0f;
+static THREADLOCAL float nearest_dist = INFINITY;
+static THREADLOCAL bool target_found = false;
+static void on_missile_shape(cpShape *shape, cpContactPointSet *points, void *data)
+{
+  Entity *launcher = (Entity *)data;
+  Entity *other = cp_shape_entity(shape);
+  GameState *gs = entitys_gamestate(launcher);
+  assert(other->is_box || other->is_player || other->is_missile);
+
+  V2 to = V2sub(entity_pos(other), entity_pos(launcher));
+  bool should_attack = true;
+  if (other->is_box && box_grid(other) == box_grid(launcher))
+    should_attack = false;
+  if (other->owning_squad == launcher->owning_squad)
+    should_attack = false;
+
+  if (should_attack && V2length(to) < nearest_dist)
+  {
+    target_found = true;
+    nearest_dist = V2length(to);
+
+    // lookahead by their velocity
+    V2 rel_velocity = V2sub(entity_vel(gs, other), entity_vel(gs, launcher));
+    float dist = V2dist(entity_pos(other), entity_pos(launcher));
+    
+    float time_of_travel = sqrtf( (2.0f * dist) / (MISSILE_BURN_FORCE/MISSILE_MASS) );
+    
+    V2 other_future_pos = V2add(entity_pos(other), V2scale(rel_velocity, time_of_travel));
+    
+    V2 adjusted_to = V2sub(other_future_pos, entity_pos(launcher));
+
+    to_face = V2angle(adjusted_to);
+  }
+}
+
+LauncherTarget missile_launcher_target(GameState *gs, Entity *launcher)
+{
+  to_face = 0.0f;
+  cpBody *tmp = cpBodyNew(0.0f, 0.0f);
+  cpBodySetPosition(tmp, v2_to_cp(entity_pos(launcher)));
+  cpShape *circle = cpCircleShapeNew(tmp, MISSILE_RANGE, cpv(0, 0));
+
+  nearest_dist = INFINITY;
+  to_face = 0.0f;
+  target_found = false;
+  cpSpaceShapeQuery(gs->space, circle, on_missile_shape, (void *)launcher);
+
+  cpBodyFree(tmp);
+  cpShapeFree(circle);
+  return (LauncherTarget){.target_found = target_found, .facing_angle = to_face};
+}
+
 void on_entity_child_shape(cpBody *body, cpShape *shape, void *data);
 
 // gs is for iterating over all child shapes and destroying those, too
@@ -366,6 +441,13 @@ void create_player(Player *player)
 #endif
 }
 
+void create_missile(GameState *gs, Entity *e)
+{
+  create_body(gs, e);
+  create_rectangle_shape(gs, e, e, (V2){0}, V2scale(MISSILE_COLLIDER_SIZE, 0.5f), PLAYER_MASS);
+  e->is_missile = true;
+}
+
 void create_player_entity(GameState *gs, Entity *e)
 {
   e->is_player = true;
@@ -566,6 +648,34 @@ static void on_damage(cpArbiter *arb, cpSpace *space, cpDataPointer userData)
   entity_a = cp_shape_entity(a);
   entity_b = cp_shape_entity(b);
 
+  Entity *potential_missiles[] = {entity_a, entity_b};
+  for (Entity **missile_ptr = potential_missiles; missile_ptr - potential_missiles < ARRLEN(potential_missiles); missile_ptr++)
+  {
+    Entity *missile = entity_a;
+    cpVect (*getPointFunc)(const cpArbiter *arb, int i) = NULL;
+    if (missile == entity_a)
+      getPointFunc = cpArbiterGetPointA;
+    if (missile == entity_b)
+      getPointFunc = cpArbiterGetPointB;
+
+    if (missile->is_missile)
+    {
+      int count = cpArbiterGetCount(arb);
+      for (int i = 0; i < count; i++)
+      {
+        cpVect collision_point = getPointFunc(arb, i);
+        V2 local_collision_point = cp_to_v2(cpBodyWorldToLocal(missile->body, collision_point));
+        if (local_collision_point.x > MISSILE_COLLIDER_SIZE.x * 0.2f)
+        {
+          missile->damage += MISSILE_DAMAGE_THRESHOLD * 2.0f;
+        }
+      }
+    }
+  }
+
+  // if(entity_a->is_missile) {getPointFunc = cpArbiterGetPointA;
+  // if(entity_b->is_missile) getPointFunc = cpArbiterGetPointB;
+
   float damage = V2length(cp_to_v2(cpArbiterTotalImpulse(arb))) * COLLISION_DAMAGE_SCALING;
 
   if (entity_a->is_box && entity_a->box_type == BoxExplosive)
@@ -847,6 +957,7 @@ enum GameVersion
 {
   VInitial,
   VMoreBoxes,
+  VMissileMerge,
   VMax, // this minus one will be the version used
 };
 
@@ -989,13 +1100,19 @@ SerMaybeFailure ser_entity(SerState *ser, GameState *gs, Entity *e)
   if (ser->version >= VMoreBoxes && !ser->save_or_load_from_disk)
     SER_VAR(&e->time_was_last_cloaked);
 
+  if (ser->version >= VMissileMerge)
+    SER_VAR(&e->owning_squad);
+
   SER_VAR(&e->is_player);
   if (e->is_player)
   {
     SER_ASSERT(e->no_save_to_disk);
 
     SER_MAYBE_RETURN(ser_entityid(ser, &e->currently_inside_of_box));
-    SER_VAR(&e->presenting_squad);
+    if (ser->version < VMissileMerge)
+    {
+      SER_VAR_NAME(&e->owning_squad, "&e->presenting_squad");
+    }
     SER_VAR(&e->squad_invited_to);
     SER_VAR(&e->goldness);
   }
@@ -1015,6 +1132,15 @@ SerMaybeFailure ser_entity(SerState *ser, GameState *gs, Entity *e)
     SER_MAYBE_RETURN(ser_entityid(ser, &e->boxes));
   }
 
+  if (ser->version >= VMissileMerge)
+  {
+    SER_VAR(&e->is_missile)
+    if (e->is_missile)
+    {
+      SER_VAR(&e->time_burned_for);
+    }
+  }
+
   SER_VAR(&e->is_box);
   if (e->is_box)
   {
@@ -1058,6 +1184,9 @@ SerMaybeFailure ser_entity(SerState *ser, GameState *gs, Entity *e)
     case BoxCloaking:
       SER_VAR(&e->cloaking_power);
       break;
+    case BoxMissileLauncher:
+      SER_VAR(&e->missile_construction_charge);
+      break;
     default:
       break;
     }
@@ -1799,7 +1928,7 @@ void process(GameState *gs, float dt)
       }
     }
     assert(p->is_player);
-    p->presenting_squad = player->squad;
+    p->owning_squad = player->squad;
 
     if (p->squad_invited_to != SquadNone)
     {
@@ -2077,6 +2206,24 @@ void process(GameState *gs, float dt)
       }
     }
 
+    if (e->is_missile)
+    {
+      if (is_burning(e))
+      {
+        e->time_burned_for += dt;
+        cpBodyApplyForceAtWorldPoint(e->body, v2_to_cp(V2rotate((V2){.x = MISSILE_BURN_FORCE, .y = 0.0f}, entity_rotation(e))), v2_to_cp(entity_pos(e)));
+      }
+      if (e->damage >= MISSILE_DAMAGE_THRESHOLD)
+      {
+
+        Entity *explosion = new_entity(gs);
+        explosion->is_explosion = true;
+        explosion->explosion_pos = entity_pos(e);
+        explosion->explosion_vel = cp_to_v2(cpBodyGetVelocity(e->body));
+        entity_destroy(gs, e);
+      }
+    }
+
     if (e->is_box)
     {
       if (e->is_platonic)
@@ -2194,6 +2341,29 @@ void process(GameState *gs, float dt)
             cpBodyFree(tmp);
           }
         }
+        if (cur_box->box_type == BoxMissileLauncher)
+        {
+          LauncherTarget target = missile_launcher_target(gs, cur_box);
+
+          if (cur_box->missile_construction_charge < 1.0f)
+          {
+            float want_use_energy = dt * MISSILE_CHARGE_RATE;
+            float energy_charged = want_use_energy - batteries_use_energy(gs, grid, &non_battery_energy_left_over, want_use_energy);
+            cur_box->missile_construction_charge += energy_charged;
+          }
+
+          if (target.target_found && cur_box->missile_construction_charge >= 1.0f)
+          {
+            cur_box->missile_construction_charge = 0.0f;
+            Entity *new_missile = new_entity(gs);
+            create_missile(gs, new_missile);
+            new_missile->owning_squad = cur_box->owning_squad; // missiles have teams and attack eachother!
+            float missile_spawn_dist = sqrtf((BOX_SIZE / 2.0f) * (BOX_SIZE / 2.0f) * 2.0f) + MISSILE_COLLIDER_SIZE.x / 2.0f + 0.1f;
+            cpBodySetPosition(new_missile->body, v2_to_cp(V2add(entity_pos(cur_box), V2rotate((V2){.x = missile_spawn_dist, 0.0f}, target.facing_angle))));
+            cpBodySetAngle(new_missile->body, target.facing_angle);
+            cpBodySetVelocity(new_missile->body, v2_to_cp(box_vel(cur_box)));
+          }
+        }
         if (cur_box->box_type == BoxScanner)
         {
           // set the nearest platonic solid! only on server as only the server sees everything

main.c

@@ -111,6 +111,8 @@ static sg_image image_solarpanel_charging;
 static sg_image image_scanner_head;
 static sg_image image_itemswitch;
 static sg_image image_cloaking_panel;
+static sg_image image_missile;
+static sg_image image_missile_burning;
 
 static enum BoxType toolbar[TOOLBAR_SLOTS] = {
     BoxHullpiece,
@@ -191,12 +193,15 @@ static struct BoxInfo
         .type = BoxCloaking,
         .image_path = "loaded/cloaking_device.png",
     },
+    {
+        .type = BoxMissileLauncher,
+        .image_path = "loaded/missile_launcher.png",
+    },
 };
 #define ENTITIES_ITER(cur)                                                \
   for (Entity *cur = gs.entities; cur < gs.entities + gs.cur_next_entity; \
        cur++)                                                             \
     if (cur->exists)
-#define ARRLEN(arr) (sizeof(arr) / sizeof(*arr))
 // suppress compiler warning about ^^ above used in floating point context
 #define ARRLENF(arr) ((float)sizeof(arr) / sizeof(*arr))
 static struct SquadMeta
@@ -534,6 +539,8 @@ static void init(void)
         image_scanner_head = load_image("loaded/scanner_head.png");
         image_itemswitch = load_image("loaded/itemswitch.png");
         image_cloaking_panel = load_image("loaded/cloaking_panel.png");
+        image_missile_burning = load_image("loaded/missile_burning.png");
+        image_missile = load_image("loaded/missile.png");
       }
 
       // socket initialization
@@ -1793,7 +1800,7 @@ static void frame(void)
 
               // all of these box types show team colors so are drawn with the hue shifting shader
               // used with the player
-              if (b->box_type == BoxCloaking)
+              if (b->box_type == BoxCloaking || b->box_type == BoxMissileLauncher)
               {
                 pipeline_scope(hueshift_pipeline)
                 {
@@ -1808,6 +1815,23 @@ static void frame(void)
               }
               sgp_reset_image(0);
 
+              if (b->box_type == BoxMissileLauncher)
+              {
+                set_color(RED);
+                draw_circle(entity_pos(b), MISSILE_RANGE);
+
+                // draw the charging missile
+                transform_scope
+                {
+                  sgp_rotate_at(missile_launcher_target(&gs, b).facing_angle, entity_pos(b).x, entity_pos(b).y);
+                  sgp_set_color(1.0f, 1.0f, 1.0f, b->missile_construction_charge);
+                  sgp_set_image(0, image_missile);
+                  pipeline_scope(goodpixel_pipeline)
+                      draw_texture_centered(entity_pos(b), BOX_SIZE);
+                  sgp_reset_image(0);
+                }
+              }
+
               if (b->box_type == BoxScanner)
               {
                 sgp_set_image(0, image_scanner_head);
@@ -1823,6 +1847,7 @@ static void frame(void)
                 set_color(WHITE);
               }
 
+              // scanner range, visualizes what scanner can scan
               if (b->box_type == BoxScanner)
               {
                 set_color(BLUE);
@@ -1857,6 +1882,28 @@ static void frame(void)
           }
         }
 
+        // draw missile
+        if (e->is_missile)
+        {
+          transform_scope
+          {
+            sgp_rotate_at(entity_rotation(e), entity_pos(e).x, entity_pos(e).y);
+            sgp_set_color(1.0f, 1.0f, 1.0f, 1.0f);
+
+            if (is_burning(e))
+            {
+              sgp_set_image(0, image_missile_burning);
+            }
+            else
+            {
+              sgp_set_image(0, image_missile);
+            }
+
+            pipeline_scope(goodpixel_pipeline)
+                draw_texture_rectangle_centered(entity_pos(e), MISSILE_SPRITE_SIZE);
+          }
+        }
+
         // draw player
         if (e->is_player &&
             get_entity(&gs, e->currently_inside_of_box) == NULL)
@@ -1868,7 +1915,7 @@ static void frame(void)
 
             pipeline_scope(hueshift_pipeline)
             {
-              setup_hueshift(e->presenting_squad);
+              setup_hueshift(e->owning_squad);
               sgp_set_image(0, image_player);
               draw_texture_rectangle_centered(
                   entity_pos(e), V2scale(PLAYER_SIZE, player_scaling));

tooling.ahk

@@ -14,7 +14,7 @@ WinActivate, flightbuild
 If WinActive("flightbuild")
 {
     Send, {Enter}
-    Send, remedybg continue-execution && sleep 0.1 && remedybg.exe stop-debugging && msbuild && remedybg.exe start-debugging {Enter}
+    Send, remedybg continue-execution && timeout 1 && remedybg.exe stop-debugging && msbuild && remedybg.exe start-debugging {Enter}
 }
 return
 
@@ -25,6 +25,6 @@ WinActivate, flightbuild
 If WinActive("flightbuild")
 {
     Send, {Enter}
-    Send, remedybg continue-execution && sleep 0.1 && remedybg.exe stop-debugging && msbuild && remedybg.exe start-debugging && sleep 0.2 && x64\Debug\Flight.exe {Enter}
+    Send, remedybg continue-execution && timeout 1 && remedybg.exe stop-debugging && msbuild && remedybg.exe start-debugging && sleep 0.2 && x64\Debug\Flight.exe {Enter}
 }
 return

types.h

@@ -10,6 +10,16 @@
 #define PLAYER_MASS 0.5f
 #define PLAYER_JETPACK_FORCE 1.5f
 #define PLAYER_JETPACK_TORQUE 0.05f
+#define MISSILE_RANGE 4.0f
+#define MISSILE_BURN_TIME 1.5f
+#define MISSILE_BURN_FORCE 2.0f
+#define MISSILE_MASS 1.0f
+// how many missiles grown per second
+#define MISSILE_DAMAGE_THRESHOLD 0.2f
+#define MISSILE_CHARGE_RATE 0.5f 
+// centered on the sprite
+#define MISSILE_SPRITE_SIZE ((V2){.x = BOX_SIZE, .y = BOX_SIZE})
+#define MISSILE_COLLIDER_SIZE ((V2){.x = BOX_SIZE*0.5f, .y = BOX_SIZE*0.5f})
 // #define PLAYER_JETPACK_FORCE 20.0f
 // distance at which things become geostationary and no more solar power!
 #define PLAYER_JETPACK_ROTATION_ENERGY_PER_SECOND 0.2f
@@ -80,6 +90,8 @@
 #define THREADLOCAL __thread
 #endif
 
+#define ARRLEN(x) (sizeof(x) / sizeof((x)[0]))
+
 // must make this header and set the target address, just #define SERVER_ADDRESS "127.0.0.1"
 #include "ipsettings.h" // don't leak IP!
 
@@ -154,6 +166,7 @@ enum BoxType
   BoxScanner,
   BoxGyroscope,
   BoxCloaking,
+  BoxMissileLauncher,
   BoxLast,
 };
 
@@ -236,7 +249,7 @@ typedef struct Entity
 
   // player
   bool is_player;
-  enum Squad presenting_squad; // also controls what the player can see, because of cloaking!
+  enum Squad owning_squad; // also controls what the player can see, because of cloaking!
   EntityID currently_inside_of_box;
   enum Squad squad_invited_to; // if squad none, then no squad invite
   float goldness;              // how much the player is a winner
@@ -247,6 +260,10 @@ typedef struct Entity
   V2 explosion_vel;
   float explosion_progresss; // in seconds
 
+  // missile
+  bool is_missile;
+  float time_burned_for; // until MISSILE_BURN_TIME
+  
   // grids
   bool is_grid;
   float total_energy_capacity;
@@ -254,7 +271,6 @@ typedef struct Entity
 
   // boxes
   bool is_box;
-  enum Squad owning_squad; // which squad owns this box
   enum BoxType box_type;
   bool is_platonic; // can't be destroyed, unaffected by physical forces
   bool always_visible; // always serialized to the player. @Robust check if not used
@@ -263,6 +279,9 @@ typedef struct Entity
   enum CompassRotation compass_rotation;
   bool indestructible;
   
+  // missile launcher
+  float missile_construction_charge;
+  
   // used by medbay and cockpit
   EntityID player_who_is_inside_of_me; 
   
@@ -401,6 +420,7 @@ bool client_to_server_deserialize(GameState *gs, struct ClientToServer *msg, uns
 bool client_to_server_serialize(GameState *gs, struct ClientToServer *msg, unsigned char*bytes, size_t *out_len, size_t max_len);
 
 // entities
+bool is_burning(Entity *missile);
 Entity *get_entity(struct GameState *gs, EntityID id);
 Entity *new_entity(struct GameState *gs);
 EntityID get_id(struct GameState *gs, Entity *e);
@@ -412,6 +432,12 @@ void entity_ensure_in_orbit(Entity *e);
 void entity_destroy(GameState *gs, Entity *e);
 #define BOX_CHAIN_ITER(gs, cur, starting_box) for (Entity *cur = get_entity(gs, starting_box); cur != NULL; cur = get_entity(gs, cur->next_box))
 #define BOXES_ITER(gs, cur, grid_entity_ptr) BOX_CHAIN_ITER(gs, cur, (grid_entity_ptr)->boxes)
+typedef struct LauncherTarget
+{
+  bool target_found;
+  float facing_angle; // in global coords
+} LauncherTarget;
+LauncherTarget missile_launcher_target(GameState *gs, Entity *launcher);
 
 // grid
 void grid_create(struct GameState *gs, Entity *e);