survival game wip

code/foundation/src/core/game.h

@@ -23,6 +23,9 @@ void game_input();
 void game_update();
 void game_render();
 
+void game_player_joined(uint64_t ent);
+void game_player_departed(uint64_t ent);
+
 //~ Called from platform.c
 void game_draw_ui();
 

code/foundation/src/gui/tooltip.c

@@ -139,7 +139,6 @@ void tooltip_clear(void) {
 
 inline void tooltip_draw_contents(tooltip *desc) {
 	if (!desc) return;
-
 	nk_layout_row_dynamic(game_ui, 0, 1); 
 	nk_label_wrap(game_ui, desc->content);
 }

code/foundation/src/lists/assets_list.c

@@ -32,6 +32,7 @@ static asset assets[] = {
     ASSET_TEX(ASSET_BLUEPRINT),
     ASSET_TEX(ASSET_BLUEPRINT_DEMO_HOUSE),
 	ASSET_TEX(ASSET_MOB),
+	ASSET_TEX(ASSET_PLAYER),
     
     // NOTE(zaklaus): blocks
     ASSET_TEX(ASSET_FENCE),

code/foundation/src/models/prefabs/player.c

@@ -6,6 +6,8 @@
 #include "models/entity.h"
 #include "models/components.h"
 
+#include "core/game.h"
+
 #define PLAYER_MAX_HP 100.0f
 
 uint64_t player_spawn(char *name) {
@@ -30,5 +32,6 @@ uint64_t player_spawn(char *name) {
 }
 
 void player_despawn(uint64_t ent_id) {
+	game_player_departed(ent_id);
     entity_despawn(ent_id);
 }

code/foundation/src/packets/pkt_00_init.c

@@ -31,6 +31,8 @@ int32_t pkt_00_init_handler(pkt_header *header) {
 
     entity_set_position(ent_id, world_dim()/2.0f + rand()%15*15.0f, world_dim()/2.0f + rand()%15*15.0f);
 
+	game_player_joined(ent_id);
+
     zpl_printf("[INFO] initializing player entity id: %d with view id: %d for peer id: %d...\n", ent_id, table.view_id, peer_id);
     ecs_set(world_ecs(), ent_id, ClientInfo, {.peer = peer_id, .view_id = header->view_id, .active = false });
     pkt_01_welcome_send(world_seed(), peer_id, header->view_id, ent_id, world_chunk_size(), world_chunk_amount());

code/foundation/src/systems/systems.c

@@ -14,12 +14,12 @@ ZPL_DIAGNOSTIC_PUSH_WARNLEVEL(0)
 ZPL_DIAGNOSTIC_POP
 
 #define PHY_BLOCK_COLLISION 1
+#define PHY_C2_BLOCK_COLLISION 0
 #define PHY_WALK_DRAG 4.23f
 #define PHY_LOOKAHEAD(x) (zpl_sign(x)*16.0f)
 
-ecs_query_t *ecs_rigidbodies;
+ecs_query_t *ecs_rigidbodies = 0;
-
+ecs_entity_t ecs_timer = 0;
-#define ECO2D_TICK_RATE (1.0f/20.f)
 
 #include "modules/system_onfoot.c"
 #include "modules/system_demo.c"
@@ -28,7 +28,6 @@ ecs_query_t *ecs_rigidbodies;
 #include "modules/system_logistics.c"
 #include "modules/system_producer.c"
 #include "modules/system_blueprint.c"
-#include "modules/system_mob.c"
 
 static inline float physics_correction(float x, float vx, float bounce, float dim) {
     float r = (((zpl_max(0.0f, dim - zpl_abs(x))*zpl_sign(x)))*dim);
@@ -39,6 +38,23 @@ static inline bool physics_check_aabb(float a1x, float a2x, float a1y, float a2y
     return (a1x < b2x && a2x > b1x && a1y < b2y && a2y > b1y);
 }
 
+static inline bool BlockCollisionIslandTest(Position *p, librg_chunk ch_p) {
+	// collect islands
+	collision_island islands[16];
+	uint8_t num_islands = world_chunk_collision_islands(ch_p, islands);
+	for (uint8_t i = 0; i < num_islands; i++) {
+#if 1
+		{
+			zpl_printf("px %f py %f minx %f miny %f\n", p->x, p->y, islands[i].minx, islands[i].miny);
+			debug_v2 a = {islands[i].minx, islands[i].miny};
+			debug_v2 b = {islands[i].maxx+WORLD_BLOCK_SIZE, islands[i].maxy+WORLD_BLOCK_SIZE};
+			debug_push_rect(a, b, 0xFFFFFFFF);
+		}
+#endif		
+	}
+
+	return 0;
+}
 
 void BlockCollisions(ecs_iter_t *it) {
 	profile(PROF_PHYS_BLOCK_COLS) {
@@ -59,6 +75,16 @@ void BlockCollisions(ecs_iter_t *it) {
 					p[i].y = zpl_clamp(p[i].y, 0, w-1);
 				}
 
+#if PHY_C2_BLOCK_COLLISION==1
+				// collision islands
+				{
+					librg_chunk chunk_id = librg_chunk_from_realpos(world_tracker(), p[i].x, p[i].y, 0);
+
+					if (BlockCollisionIslandTest((p+i), chunk_id))
+						continue;
+				}
+#endif
+                
 #if PHY_BLOCK_COLLISION==1
 				// NOTE(zaklaus): X axis
 				{
@@ -141,17 +167,16 @@ void BodyCollisions(ecs_iter_t *it) {
 					float p2_y = p2[j].y /*+ v2[j].y*/;
 	
 					c2AABB box_a = {
-						.min = { p_x - WORLD_BLOCK_SIZE / 2, p_y - WORLD_BLOCK_SIZE / 2 },
+						.min = { p_x - WORLD_BLOCK_SIZE / 2, p_y - WORLD_BLOCK_SIZE / 4 },
-						.max = { p_x + WORLD_BLOCK_SIZE / 2, p_y + WORLD_BLOCK_SIZE / 2 },
+						.max = { p_x + WORLD_BLOCK_SIZE / 2, p_y + WORLD_BLOCK_SIZE / 4 },
 					};
 	
 					c2AABB box_b = {
-						.min = { p2_x - WORLD_BLOCK_SIZE / 2, p2_y - WORLD_BLOCK_SIZE / 2 },
+						.min = { p2_x - WORLD_BLOCK_SIZE / 2, p2_y - WORLD_BLOCK_SIZE / 4 },
-						.max = { p2_x + WORLD_BLOCK_SIZE / 2, p2_y + WORLD_BLOCK_SIZE / 2 },
+						.max = { p2_x + WORLD_BLOCK_SIZE / 2, p2_y + WORLD_BLOCK_SIZE / 4 },
 					};
 
 					// do a basic sweep first
-					{
 					float r1x = (box_a.max.x-box_a.min.x);
 					float r1y = (box_a.max.y-box_a.min.y);
 					float r1 = (r1x*r1x + r1y*r1y)*.5f;
@@ -160,6 +185,7 @@ void BodyCollisions(ecs_iter_t *it) {
 					float r2y = (box_b.max.y-box_b.min.y);
 					float r2 = (r2x*r2x + r2y*r2y)*.5f;
 
+					{
 						float dx = (p2_x-p_x);
 						float dy = (p2_y-p_y);
 						float d = (dx*dx + dy*dy);
@@ -170,12 +196,12 @@ void BodyCollisions(ecs_iter_t *it) {
 
 					c2Circle circle_a = { 
 						.p = { p_x, p_y },
-						.r = b[i].circle.r,
+						.r = r1/2.f,
 					};
 
 					c2Circle circle_b = {
 						.p = { p2_x, p2_y },
-						.r = b2[j].circle.r,
+						.r = r2/2.f,
 					};
 
 					const void *shapes_a[] = { &circle_a, &box_a };
@@ -365,19 +391,10 @@ void DisableWorldEdit(ecs_iter_t *it) {
     world_set_stage(NULL);
 }
 
-#define ECS_SYSTEM_TICKED(world, id, stage, ...)\
-ECS_SYSTEM(world, id, stage, __VA_ARGS__);\
-ecs_set_tick_source(world, id, timer);
-
-#define ECS_SYSTEM_TICKED_EX(world, id, stage, time, ...)\
-ECS_SYSTEM(world, id, stage, __VA_ARGS__);\
-ecs_entity_t timer_##id = ecs_set_interval(ecs, 0, ECO2D_TICK_RATE*time);\
-ecs_set_tick_source(world, id, timer_##id);
-
 void SystemsImport(ecs_world_t *ecs) {
     ECS_MODULE(ecs, Systems);
     
-    ecs_entity_t timer = ecs_set_interval(ecs, 0, ECO2D_TICK_RATE);
+    ecs_timer = ecs_set_interval(ecs, 0, ECO2D_TICK_RATE);
 
 	ecs_rigidbodies = ecs_query_new(ecs, "components.Position, components.Velocity, components.PhysicsBody");
 
@@ -419,10 +436,6 @@ void SystemsImport(ecs_world_t *ecs) {
 	ECS_SYSTEM_TICKED(ecs, CreatureSeekCompanion, EcsPostUpdate, components.Creature, components.Position, components.Velocity, components.SeeksCompanion, !components.SeeksFood);
 	ECS_SYSTEM(ecs, CreatureRoamAround, EcsPostUpdate, components.Velocity, components.Creature, !components.SeeksFood, !components.SeeksCompanion);
 	
-	ECS_SYSTEM_TICKED_EX(ecs, MobDetectPlayers, EcsPostUpdate, 100.0f, components.Position, components.Mob);
-	ECS_SYSTEM(ecs, MobMovement, EcsPostUpdate, components.Velocity, components.Position, components.MobHuntPlayer);
-	ECS_SYSTEM_TICKED(ecs, MobMeleeAtk, EcsPostUpdate, components.Position, components.Mob, components.MobHuntPlayer, components.MobMelee);
-    
     ECS_SYSTEM(ecs, ResetActivators, EcsPostUpdate, components.Input);
     
     ECS_SYSTEM(ecs, ClearVehicle, EcsUnSet, components.Vehicle);

code/foundation/src/systems/systems.h

@@ -5,6 +5,21 @@ static inline float safe_dt(ecs_iter_t *it) {
     return zpl_min(it->delta_time, 0.03334f);
 }
 
+extern ecs_query_t *ecs_rigidbodies;
+extern ecs_entity_t ecs_timer;
+
 #define TICK_VAR(var) (var) = zpl_max((var)-1, 0)
 
+#define ECO2D_TICK_RATE (1.0f/20.f)
+
+#define ECS_SYSTEM_TICKED(world, id, stage, ...)\
+	ECS_SYSTEM(world, id, stage, __VA_ARGS__);\
+	ecs_set_tick_source(world, id, ecs_timer);
+
+#define ECS_SYSTEM_TICKED_EX(world, id, stage, time, ...)\
+	ECS_SYSTEM(world, id, stage, __VA_ARGS__);\
+	ecs_entity_t timer_##id = ecs_set_interval(ecs, 0, ECO2D_TICK_RATE*time);\
+	ecs_set_tick_source(world, id, timer_##id);
+
+
 void SystemsImport(ecs_world_t *ecs);

code/foundation/src/world/world.c

@@ -21,35 +21,35 @@
 ZPL_TABLE(static, world_snapshot, world_snapshot_, entity_view);
 ZPL_TABLE(static, world_component_cache, world_component_cache_, zpl_uintptr); // TODO(inlife): not use for long
 
-static world_data world = {0};
+static world_data world = { 0 };
 static world_snapshot streamer_snapshot;
 static world_component_cache component_cache;
 
-entity_view *world_build_entity_view(int64_t e) {
+entity_view* world_build_entity_view(int64_t e) {
-    entity_view *cached_ev = world_snapshot_get(&streamer_snapshot, e);
+    entity_view* cached_ev = world_snapshot_get(&streamer_snapshot, e);
     if (cached_ev) return cached_ev;
 
-    entity_view view = {0};
+    entity_view view = { 0 };
 
-    const Classify *classify = ecs_get(world_ecs(), e, Classify);
+    const Classify* classify = ecs_get(world_ecs(), e, Classify);
     ZPL_ASSERT(classify);
 
     view.kind = classify->id;
 
-    const Position *pos = ecs_get(world_ecs(), e, Position);
+    const Position* pos = ecs_get(world_ecs(), e, Position);
     if (pos) {
         view.x = pos->x;
         view.y = pos->y;
     }
 
-    const Velocity *vel = ecs_get(world_ecs(), e, Velocity);
+    const Velocity* vel = ecs_get(world_ecs(), e, Velocity);
     if (vel) {
         view.flag |= EFLAG_INTERP;
         view.vx = vel->x;
         view.vy = vel->y;
     }
 
-    const Health *health = ecs_get(world_ecs(), e, Health);
+    const Health* health = ecs_get(world_ecs(), e, Health);
     if (health) {
         view.hp = health->hp;
         view.max_hp = health->max_hp;
@@ -78,29 +78,29 @@ entity_view *world_build_entity_view(int64_t e) {
 
     view.inside_vehicle = ecs_get(world_ecs(), e, IsInVehicle) != 0 ? true : false;
 
-    Inventory *inv = 0;
+    Inventory* inv = 0;
     if ((inv = ecs_get_mut_if_ex(world_ecs(), e, Inventory))) {
         view.has_items = true;
 
         for (int i = 0; i < ITEMS_INVENTORY_SIZE; i += 1) {
-            const Item *it = ecs_get_if(world_ecs(), inv->items[i], Item);
+            const Item* it = ecs_get_if(world_ecs(), inv->items[i], Item);
-            view.items[i] = it ? *it : (Item){0};
+            view.items[i] = it ? *it : (Item) { 0 };
         }
 
-        const Input *in = ecs_get(world_ecs(), e, Input);
+        const Input* in = ecs_get(world_ecs(), e, Input);
-        if (in){
+        if (in) {
             view.selected_item = in->selected_item;
             view.pick_ent = (uint64_t)in->pick_ent;
             view.sel_ent = (uint64_t)in->sel_ent;
 
-            if (world_entity_valid(in->storage_ent)){
+            if (world_entity_valid(in->storage_ent)) {
-                ItemContainer *ic = 0;
+                ItemContainer* ic = 0;
-                if ((ic = ecs_get_mut_if_ex(world_ecs(), in->storage_ent, ItemContainer))){
+                if ((ic = ecs_get_mut_if_ex(world_ecs(), in->storage_ent, ItemContainer))) {
                     view.has_storage_items = true;
 
                     for (int i = 0; i < ITEMS_CONTAINER_SIZE; i += 1) {
-                        const Item *it = ecs_get_if(world_ecs(), ic->items[i], Item);
+                        const Item* it = ecs_get_if(world_ecs(), ic->items[i], Item);
-                        view.storage_items[i] = it ? *it : (Item){0};
+                        view.storage_items[i] = it ? *it : (Item) { 0 };
                     }
 
                     view.storage_selected_item = in->storage_selected_item;
@@ -122,7 +122,7 @@ entity_view *world_build_entity_view(int64_t e) {
         }
     }
 
-    Chunk *chunk = 0;
+    Chunk* chunk = 0;
     if ((chunk = ecs_get_mut_if(world_ecs(), e, Chunk))) {
         view.chk_id = chunk->id;
         view.x = chunk->x;
@@ -131,11 +131,11 @@ entity_view *world_build_entity_view(int64_t e) {
         view.is_dirty = chunk->is_dirty;
         chunk->is_dirty = false;
 
-        for (int i = 0; i < world.chunk_size*world.chunk_size; i += 1) {
+        for (int i = 0; i < world.chunk_size * world.chunk_size; i += 1) {
             view.blocks[i] = world.block_mapping[chunk->id][i];
         }
 
-        for (int i = 0; i < world.chunk_size*world.chunk_size; i += 1) {
+        for (int i = 0; i < world.chunk_size * world.chunk_size; i += 1) {
             view.outer_blocks[i] = world.outer_block_mapping[chunk->id][i];
         }
     }
@@ -144,25 +144,25 @@ entity_view *world_build_entity_view(int64_t e) {
     return world_snapshot_get(&streamer_snapshot, e);
 }
 
-int32_t tracker_write_create(librg_world *w, librg_event *e) {
+int32_t tracker_write_create(librg_world* w, librg_event* e) {
     int64_t entity_id = librg_event_entity_get(w, e);
 #ifdef WORLD_LAYERING
-    if (world.active_layer_id != WORLD_TRACKER_LAYERS-1) {
+    if (world.active_layer_id != WORLD_TRACKER_LAYERS - 1) {
         // NOTE(zaklaus): reject updates from smaller layers
         return LIBRG_WRITE_REJECT;
     }
 #endif
     size_t actual_length = librg_event_size_get(w, e);
-    char *buffer = librg_event_buffer_get(w, e);
+    char* buffer = librg_event_buffer_get(w, e);
 
     return (int32_t)entity_view_pack_struct(buffer, actual_length, world_build_entity_view(entity_id));
 }
 
-int32_t tracker_write_remove(librg_world *w, librg_event *e) {
+int32_t tracker_write_remove(librg_world* w, librg_event* e) {
     (void)e;
     (void)w;
 #ifdef WORLD_LAYERING
-    if (world.active_layer_id != WORLD_TRACKER_LAYERS-1) {
+    if (world.active_layer_id != WORLD_TRACKER_LAYERS - 1) {
         // NOTE(zaklaus): reject updates from smaller layers
         return LIBRG_WRITE_REJECT;
     }
@@ -170,11 +170,11 @@ int32_t tracker_write_remove(librg_world *w, librg_event *e) {
     return 0;
 }
 
-int32_t tracker_write_update(librg_world *w, librg_event *e) {
+int32_t tracker_write_update(librg_world* w, librg_event* e) {
     int64_t entity_id = librg_event_entity_get(w, e);
     size_t actual_length = librg_event_size_get(w, e);
-    char *buffer = librg_event_buffer_get(w, e);
+    char* buffer = librg_event_buffer_get(w, e);
-    entity_view *view = world_build_entity_view(entity_id);
+    entity_view* view = world_build_entity_view(entity_id);
 
     // NOTE(zaklaus): exclude chunks from updates as they never move
     {
@@ -195,23 +195,63 @@ int32_t tracker_write_update(librg_world *w, librg_event *e) {
     return (int32_t)entity_view_pack_struct(buffer, actual_length, view);
 }
 
-void world_setup_pkt_handlers(world_pkt_reader_proc *reader_proc, world_pkt_writer_proc *writer_proc) {
+void world_setup_pkt_handlers(world_pkt_reader_proc* reader_proc, world_pkt_writer_proc* writer_proc) {
     world.reader_proc = reader_proc;
     world.writer_proc = writer_proc;
 }
 
+void world_rebuild_chunk_islands(librg_chunk chunk_id) {
+    uint16_t ch_x, ch_y;
+    librg_chunk_to_chunkpos(world.tracker, chunk_id, &ch_x, &ch_y, NULL);
+    float wp_x = (float)ch_x * world_dim(), wp_y = (float)ch_y * world_dim();
+
+    world.islands_count[chunk_id] = 0;
+    collision_island clr_island = { ZPL_F32_MAX, ZPL_F32_MAX, ZPL_F32_MIN, ZPL_F32_MIN };
+    collision_island new_island = clr_island;
+
+    for (int y = 0; y < world.chunk_size; y += 1) {
+        for (int x = 0; x < world.chunk_size; x += 1) {
+            block_id c = world.block_mapping[chunk_id][(y * world.chunk_size) + x];
+
+            float wx = x * WORLD_BLOCK_SIZE + wp_x;
+            float wy = y * WORLD_BLOCK_SIZE  + wp_y;
+
+            if (blocks_get_flags(c) & BLOCK_FLAG_COLLISION) {
+                if (new_island.minx > wx)
+                    new_island.minx = wx;
+                if (new_island.miny > wy)
+                    new_island.miny = wy;
+                if (new_island.maxx < wx)
+                    new_island.maxx = wx;
+                if (new_island.maxy < wy)
+                    new_island.maxy = wy;
+            }
+            else if (zpl_memcompare(&new_island, &clr_island, sizeof(collision_island))) {
+                world.islands[chunk_id * 16 + world.islands_count[chunk_id]] = new_island;
+                world.islands_count[chunk_id]++;
+                new_island = clr_island;
+            }
+        }
+    }
+
+    if (zpl_memcompare(&new_island, &clr_island, sizeof(collision_island))) {
+        world.islands[chunk_id * 16 + world.islands_count[chunk_id]] = new_island;
+        world.islands_count[chunk_id]++;
+    }
+}
+
 static inline
 void world_chunk_setup_grid(void) {
     for (int i = 0; i < zpl_square(world.chunk_amount); ++i) {
         ecs_entity_t e = ecs_new(world.ecs, 0);
-        ecs_set(world.ecs, e, Classify, {.id = EKIND_CHUNK });
+        ecs_set(world.ecs, e, Classify, { .id = EKIND_CHUNK });
-        Chunk *chunk = ecs_get_mut(world.ecs, e, Chunk);
+        Chunk* chunk = ecs_get_mut(world.ecs, e, Chunk);
         librg_entity_track(world.tracker, e);
         librg_entity_chunk_set(world.tracker, e, i);
         librg_chunk_to_chunkpos(world.tracker, i, &chunk->x, &chunk->y, NULL);
         world.chunk_mapping[i] = e;
-        world.block_mapping[i] = zpl_malloc(sizeof(block_id)*zpl_square(world.chunk_size));
+        world.block_mapping[i] = zpl_malloc(sizeof(block_id) * zpl_square(world.chunk_size));
-        world.outer_block_mapping[i] = zpl_malloc(sizeof(block_id)*zpl_square(world.chunk_size));
+        world.outer_block_mapping[i] = zpl_malloc(sizeof(block_id) * zpl_square(world.chunk_size));
         chunk->id = i;
         chunk->is_dirty = false;
 
@@ -220,13 +260,15 @@ void world_chunk_setup_grid(void) {
                 int chk_x = chunk->x * world.chunk_size;
                 int chk_y = chunk->y * world.chunk_size;
 
-                block_id *c = &world.block_mapping[i][(y*world.chunk_size)+x];
+                block_id* c = &world.block_mapping[i][(y * world.chunk_size) + x];
-                *c = world.data[(chk_y+y)*world.dim + (chk_x+x)];
+                *c = world.data[(chk_y + y) * world.dim + (chk_x + x)];
 
-                c = &world.outer_block_mapping[i][(y*world.chunk_size)+x];
+                c = &world.outer_block_mapping[i][(y * world.chunk_size) + x];
-                *c = world.outer_data[(chk_y+y)*world.dim + (chk_x+x)];
+                *c = world.outer_data[(chk_y + y) * world.dim + (chk_x + x)];
             }
         }
+
+        world_rebuild_chunk_islands(i);
     }
 }
 
@@ -248,8 +290,8 @@ void world_configure_tracker(void) {
 
 static inline
 void world_init_worldgen_data(void) {
-    world.data = zpl_malloc(sizeof(block_id)*world.size);
+    world.data = zpl_malloc(sizeof(block_id) * world.size);
-    world.outer_data = zpl_malloc(sizeof(block_id)*world.size);
+    world.outer_data = zpl_malloc(sizeof(block_id) * world.size);
 
     ZPL_ASSERT(world.data && world.outer_data);
 }
@@ -266,9 +308,11 @@ void world_setup_ecs(void) {
 
 static inline
 void world_init_mapping(void) {
-    world.chunk_mapping = zpl_malloc(sizeof(ecs_entity_t)*zpl_square(world.chunk_amount));
+    world.chunk_mapping = zpl_malloc(sizeof(ecs_entity_t) * zpl_square(world.chunk_amount));
-    world.block_mapping = zpl_malloc(sizeof(block_id*)*zpl_square(world.chunk_amount));
+    world.block_mapping = zpl_malloc(sizeof(block_id*) * zpl_square(world.chunk_amount));
-    world.outer_block_mapping = zpl_malloc(sizeof(block_id*)*zpl_square(world.chunk_amount));
+    world.outer_block_mapping = zpl_malloc(sizeof(block_id*) * zpl_square(world.chunk_amount));
+    world.islands_count = zpl_malloc(sizeof(world.islands_count[0]) * zpl_square(world.chunk_amount));
+    world.islands = zpl_malloc(sizeof(collision_island) * 16 * zpl_square(world.chunk_amount));
     world_snapshot_init(&streamer_snapshot, zpl_heap());
     world_component_cache_init(&component_cache, zpl_heap());
 }
@@ -320,12 +364,14 @@ int32_t world_destroy(void) {
     librg_world_destroy(world.tracker);
     ecs_fini(world.ecs);
     zpl_mfree(world.chunk_mapping);
-    for (int i = 0; i < zpl_square(world.chunk_amount); i+=1) {
+    for (int i = 0; i < zpl_square(world.chunk_amount); i += 1) {
         zpl_mfree(world.block_mapping[i]);
         zpl_mfree(world.outer_block_mapping[i]);
     }
     zpl_mfree(world.block_mapping);
     zpl_mfree(world.outer_block_mapping);
+    zpl_mfree(world.islands_count);
+    zpl_mfree(world.islands);
     world_snapshot_destroy(&streamer_snapshot);
     world_component_cache_destroy(&component_cache);
     zpl_memset(&world, 0, sizeof(world));
@@ -342,11 +388,11 @@ static void world_tracker_update(uint8_t ticker, float freq, uint8_t radius) {
 
     profile(PROF_WORLD_WRITE) {
         ecs_iter_t it = ecs_query_iter(world_ecs(), world.ecs_update);
-        static char buffer[WORLD_LIBRG_BUFSIZ] = {0};
+        static char buffer[WORLD_LIBRG_BUFSIZ] = { 0 };
         world.active_layer_id = ticker;
 
         while (ecs_query_next(&it)) {
-            ClientInfo *p = ecs_field(&it, ClientInfo, 1);
+            ClientInfo* p = ecs_field(&it, ClientInfo, 1);
 
             for (int i = 0; i < it.count; i++) {
                 size_t datalen = WORLD_LIBRG_BUFSIZ;
@@ -358,7 +404,8 @@ static void world_tracker_update(uint8_t ticker, float freq, uint8_t radius) {
 
                 if (result > 0) {
                     zpl_printf("[info] buffer size was not enough, please increase it by at least: %d\n", result);
-                } else if (result < 0) {
+                }
+                else if (result < 0) {
                     zpl_printf("[error] an error happened writing the world %d\n", result);
                 }
 
@@ -371,7 +418,7 @@ static void world_tracker_update(uint8_t ticker, float freq, uint8_t radius) {
 }
 
 int32_t world_update() {
-    profile (PROF_UPDATE_SYSTEMS) {
+    profile(PROF_UPDATE_SYSTEMS) {
         world_component_cache_clear(&component_cache);
         ecs_progress(world.ecs, 0.0f);
     }
@@ -397,21 +444,21 @@ int32_t world_update() {
     return 0;
 }
 
-int32_t world_read(void* data, uint32_t datalen, void *udata) {
+int32_t world_read(void* data, uint32_t datalen, void* udata) {
     if (world.reader_proc) {
         return world.reader_proc(data, datalen, udata);
     }
     return -1;
 }
 
-int32_t world_write(pkt_header *pkt, void *udata) {
+int32_t world_write(pkt_header* pkt, void* udata) {
     if (world.writer_proc) {
         return world.writer_proc(pkt, udata);
     }
     return -1;
 }
 
-uint32_t world_buf(block_id const **ptr, uint32_t *width) {
+uint32_t world_buf(block_id const** ptr, uint32_t* width) {
     ZPL_ASSERT_NOT_NULL(world.data);
     ZPL_ASSERT_NOT_NULL(ptr);
     *ptr = world.data;
@@ -423,26 +470,26 @@ uint32_t world_seed(void) {
     return world.seed;
 }
 
-ecs_world_t * world_ecs() {
+ecs_world_t* world_ecs() {
     if (world.ecs_stage != NULL) {
         return world.ecs_stage;
     }
     return world.ecs;
 }
 
-ecs_query_t *world_ecs_player(void) {
+ecs_query_t* world_ecs_player(void) {
     return world.ecs_update;
 }
 
-ecs_query_t *world_ecs_clientinfo(void) {
+ecs_query_t* world_ecs_clientinfo(void) {
     return world.ecs_clientinfo;
 }
 
-void world_set_stage(ecs_world_t *ecs) {
+void world_set_stage(ecs_world_t* ecs) {
     world.ecs_stage = ecs;
 }
 
-librg_world *world_tracker() {
+librg_world* world_tracker() {
     return world.tracker;
 }
 
@@ -484,8 +531,8 @@ ecs_entity_t world_chunk_mapping(librg_chunk id) {
 }
 
 world_block_lookup world_block_from_realpos(float x, float y) {
-    x = zpl_clamp(x, 0, world_dim()-1);
+    x = zpl_clamp(x, 0, world_dim() - 1);
-    y = zpl_clamp(y, 0, world_dim()-1);
+    y = zpl_clamp(y, 0, world_dim() - 1);
     librg_chunk chunk_id = librg_chunk_from_realpos(world.tracker, x, y, 0);
     ecs_entity_t e = world.chunk_mapping[chunk_id];
     int32_t size = world.chunk_size * WORLD_BLOCK_SIZE;
@@ -498,7 +545,7 @@ world_block_lookup world_block_from_realpos(float x, float y) {
 
     uint16_t bx = (uint16_t)chx / WORLD_BLOCK_SIZE;
     uint16_t by = (uint16_t)chy / WORLD_BLOCK_SIZE;
-    uint16_t block_idx = (by*world.chunk_size)+bx;
+    uint16_t block_idx = (by * world.chunk_size) + bx;
     block_id bid = world.outer_block_mapping[chunk_id][block_idx];
     bool is_outer = true;
     if (bid == 0) {
@@ -507,12 +554,12 @@ world_block_lookup world_block_from_realpos(float x, float y) {
     }
 
     // NOTE(zaklaus): pos relative to block's center
-    float box = chx - bx * WORLD_BLOCK_SIZE - WORLD_BLOCK_SIZE/2.0f;
+    float box = chx - bx * WORLD_BLOCK_SIZE - WORLD_BLOCK_SIZE / 2.0f;
-    float boy = chy - by * WORLD_BLOCK_SIZE - WORLD_BLOCK_SIZE/2.0f;
+    float boy = chy - by * WORLD_BLOCK_SIZE - WORLD_BLOCK_SIZE / 2.0f;
 
     // NOTE(zaklaus): absolute pos in world.
-    float abox = (uint16_t)(x / WORLD_BLOCK_SIZE) * (float)WORLD_BLOCK_SIZE + WORLD_BLOCK_SIZE/2.0f;
+    float abox = (uint16_t)(x / WORLD_BLOCK_SIZE) * (float)WORLD_BLOCK_SIZE + WORLD_BLOCK_SIZE / 2.0f;
-    float aboy = (uint16_t)(y / WORLD_BLOCK_SIZE) * (float)WORLD_BLOCK_SIZE + WORLD_BLOCK_SIZE/2.0f;
+    float aboy = (uint16_t)(y / WORLD_BLOCK_SIZE) * (float)WORLD_BLOCK_SIZE + WORLD_BLOCK_SIZE / 2.0f;
 
     world_block_lookup lookup = {
         .id = block_idx,
@@ -539,7 +586,7 @@ void world_chunk_destroy_block(float x, float y, bool drop_item) {
         if (item_find(item_asset) == ASSET_INVALID) return;
         uint64_t e = item_spawn(item_asset, 1);
 
-        Position *dest = ecs_get_mut(world_ecs(), e, Position);
+        Position* dest = ecs_get_mut(world_ecs(), e, Position);
         dest->x = x;
         dest->y = y;
         entity_set_position(e, dest->x, dest->y);
@@ -562,8 +609,8 @@ world_block_lookup world_block_from_index(int64_t id, uint16_t block_idx) {
     float bx = (float)(block_idx % world.chunk_size) * WORLD_BLOCK_SIZE;
     float by = (float)(block_idx / world.chunk_size) * WORLD_BLOCK_SIZE;
 
-    float box = chx + bx + WORLD_BLOCK_SIZE/2.0f;
+    float box = chx + bx + WORLD_BLOCK_SIZE / 2.0f;
-    float boy = chy + by + WORLD_BLOCK_SIZE/2.0f;
+    float boy = chy + by + WORLD_BLOCK_SIZE / 2.0f;
 
     world_block_lookup lookup = {
         .id = block_idx,
@@ -582,6 +629,11 @@ int64_t world_chunk_from_realpos(float x, float y) {
     return world.chunk_mapping[chunk_id];
 }
 
+uint8_t world_chunk_collision_islands(librg_chunk id, collision_island* islands) {
+    zpl_memcopy(islands, world.islands + id * 16, sizeof(collision_island) * world.islands_count[id]);
+    return world.islands_count[id];
+}
+
 int64_t world_chunk_from_entity(ecs_entity_t id) {
     return librg_entity_chunk_get(world.tracker, id);
 }
@@ -599,7 +651,8 @@ void world_chunk_replace_block(int64_t id, uint16_t block_idx, block_id bid) {
         ecs_entity_t e = entity_spawn_id(blocks_get_asset(bid));
         world_block_lookup l = world_block_from_index(id, block_idx);
         entity_set_position(e, l.ox, l.oy);
-    } else {
+    }
+    else {
         world.outer_block_mapping[id][block_idx] = bid;
         world_chunk_mark_dirty(world.chunk_mapping[id]);
     }
@@ -612,31 +665,32 @@ bool world_chunk_place_block(int64_t id, uint16_t block_idx, block_id bid) {
         ecs_entity_t e = entity_spawn_id(blocks_get_asset(bid));
         world_block_lookup l = world_block_from_index(id, block_idx);
         entity_set_position(e, l.ox, l.oy);
-    } else {
+    }
+    else {
         world.outer_block_mapping[id][block_idx] = bid;
         world_chunk_mark_dirty(world.chunk_mapping[id]);
     }
     return true;
 }
 
-block_id *world_chunk_get_blocks(int64_t id) {
+block_id* world_chunk_get_blocks(int64_t id) {
     return world.block_mapping[id];
 }
 
 void world_chunk_mark_dirty(ecs_entity_t e) {
-    bool was_added=false;
+    bool was_added = false;
-    Chunk *chunk = ecs_get_mut(world_ecs(), e, Chunk);
+    Chunk* chunk = ecs_get_mut(world_ecs(), e, Chunk);
     if (chunk) chunk->is_dirty = true;
 }
 
 bool world_chunk_is_dirty(ecs_entity_t e) {
-    bool was_added=false;
+    bool was_added = false;
-    Chunk *chunk = ecs_get_mut(world_ecs(), e, Chunk);
+    Chunk* chunk = ecs_get_mut(world_ecs(), e, Chunk);
     if (chunk) return chunk->is_dirty;
     return false;
 }
 
-int64_t *world_chunk_fetch_entities(librg_chunk chunk_id, size_t *ents_len) {
+int64_t* world_chunk_fetch_entities(librg_chunk chunk_id, size_t* ents_len) {
     ZPL_ASSERT_NOT_NULL(ents_len);
     static int64_t ents[UINT16_MAX];
     *ents_len = UINT16_MAX;
@@ -644,11 +698,11 @@ int64_t *world_chunk_fetch_entities(librg_chunk chunk_id, size_t *ents_len) {
     return ents;
 }
 
-int64_t *world_chunk_fetch_entities_realpos(float x, float y, size_t *ents_len) {
+int64_t* world_chunk_fetch_entities_realpos(float x, float y, size_t* ents_len) {
     return world_chunk_fetch_entities(librg_chunk_from_realpos(world.tracker, x, y, 0), ents_len);
 }
 
-int64_t *world_chunk_query_entities(int64_t e, size_t *ents_len, int8_t radius) {
+int64_t* world_chunk_query_entities(int64_t e, size_t* ents_len, int8_t radius) {
     ZPL_ASSERT_NOT_NULL(ents_len);
     static int64_t ents[UINT16_MAX];
     *ents_len = UINT16_MAX;
@@ -661,22 +715,22 @@ bool world_entity_valid(ecs_entity_t e) {
     return ecs_is_alive(world_ecs(), e);
 }
 
-void * world_component_cached(ecs_world_t *world_ecs, ecs_entity_t entity, ecs_id_t id) {
+void* world_component_cached(ecs_world_t* world_ecs, ecs_entity_t entity, ecs_id_t id) {
     if (!component_cache.entries || world.ecs_stage == NULL) {
         return ecs_get_mut_id(world_ecs, entity, id);
     }
 
-    static char buffer[256] = {0};
+    static char buffer[256] = { 0 };
     zpl_snprintf(buffer, 256, "%llu_%llu", entity, id);
 
     uint64_t uid = zpl_crc64(buffer, zpl_strlen(buffer));
-    zpl_uintptr *value = world_component_cache_get(&component_cache, uid);
+    zpl_uintptr* value = world_component_cache_get(&component_cache, uid);
 
     if (!value) {
-        void *the_value = ecs_get_mut_id(world_ecs, entity, id);
+        void* the_value = ecs_get_mut_id(world_ecs, entity, id);
         world_component_cache_set(&component_cache, uid, (zpl_uintptr)the_value);
         value = world_component_cache_get(&component_cache, uid);
     }
 
-    return (void *)*value;
+    return (void*)*value;
 }

code/foundation/src/world/world.h

@@ -29,6 +29,11 @@ typedef WORLD_PKT_READER(world_pkt_reader_proc);
 #define WORLD_PKT_WRITER(name) int32_t name(pkt_header *pkt, void *udata)
 typedef WORLD_PKT_WRITER(world_pkt_writer_proc);
 
+typedef struct {
+	float minx, miny;
+	float maxx, maxy;
+} collision_island;
+
 typedef struct {
     bool is_paused;
     block_id *data;
@@ -40,6 +45,8 @@ typedef struct {
     block_id **block_mapping;
     block_id **outer_block_mapping;
     uint16_t dim;
+	uint8_t *islands_count;
+	collision_island *islands;
     float tracker_update[3];
     uint8_t active_layer_id;
     ecs_world_t *ecs;
@@ -78,6 +85,8 @@ uint16_t world_chunk_size(void);
 uint16_t world_chunk_amount(void);
 uint16_t world_dim(void);
 ecs_entity_t world_chunk_mapping(librg_chunk id);
+void world_rebuild_chunk_islands(librg_chunk chunk_id);
+uint8_t world_chunk_collision_islands(librg_chunk id, collision_island *islands);
 
 typedef struct {
     uint16_t id;

code/games/minimal/src/main.c

@@ -80,3 +80,7 @@ int main(int argc, char** argv) {
     zpl_opts_free(&opts);
     return 0;
 }
+
+//------------------------------------------------------------------------
+void game_player_joined(uint64_t ent) {}
+void game_player_departed(uint64_t ent) {}

code/games/sandbox/src/main.c

@@ -84,3 +84,7 @@ int main(int argc, char** argv) {
     zpl_opts_free(&opts);
     return 0;
 }
+
+//------------------------------------------------------------------------
+void game_player_joined(uint64_t ent) {}
+void game_player_departed(uint64_t ent) {}

code/games/survival/src/main.c

@@ -16,6 +16,10 @@
 
 #include "platform/arch.h"
 
+ZPL_DIAGNOSTIC_PUSH_WARNLEVEL(0)
+#include "tinyc2.h"
+ZPL_DIAGNOSTIC_POP
+
 #define DEFAULT_WORLD_SEED 302097
 #define DEFAULT_CHUNK_SIZE 16 /* amount of blocks within a chunk (single axis) */
 #define DEFAULT_WORLD_SIZE 5 /* amount of chunks within a world (single axis) */
@@ -33,6 +37,15 @@
 	- somewhat believable world gen, small hamlets with cols, etc
 */
 
+#include "system_mob.c"
+
+void mob_systems(ecs_world_t *ecs) {
+	ECS_SYSTEM_TICKED_EX(ecs, MobDetectPlayers, EcsPostUpdate, 100.0f, components.Position, components.Mob);
+	ECS_SYSTEM(ecs, MobMovement, EcsPostUpdate, components.Velocity, components.Position, components.MobHuntPlayer);
+	ECS_SYSTEM_TICKED(ecs, MobMeleeAtk, EcsPostUpdate, components.Position, components.Mob, components.MobHuntPlayer, components.MobMelee);
+	ECS_OBSERVER(ecs, MobDetectPlayers1, EcsOnAdd, components.Mob);
+}
+
 int main(int argc, char** argv) {
     zpl_opts opts={0};
     zpl_opts_init(&opts, zpl_heap(), argv[0]);
@@ -84,6 +97,10 @@ int main(int argc, char** argv) {
     sighandler_register();
     game_init(host, port, play_mode, 1, seed, chunk_size, world_size, 0);
 
+	{
+		mob_systems(world_ecs());
+	}
+
     game_run();
 
     game_shutdown();
@@ -93,3 +110,7 @@ int main(int argc, char** argv) {
     zpl_opts_free(&opts);
     return 0;
 }
+
+//------------------------------------------------------------------------
+void game_player_joined(uint64_t ent) {}
+void game_player_departed(uint64_t ent) {}

code/games/survival/src/renderer.c

@@ -88,18 +88,19 @@ void renderer_draw_entry(uint64_t key, entity_view *data, game_world_render_entr
             float x = data->x;
             float y = data->y;
             float health = (data->hp / data->max_hp);
-            DrawNametag("Player", key, data, x, y);
+            DrawNametag("Player", key, data, x, y-16);
-            DrawCircleEco(x, y, size, ColorAlpha(YELLOW, data->tran_time));
+			DrawTextureRec(GetSpriteTexture2D(assets_find(ASSET_PLAYER)), ASSET_SRC_RECT(), (Vector2){data->x-(WORLD_BLOCK_SIZE/2), data->y-(WORLD_BLOCK_SIZE/2)}, ColorAlpha(WHITE, data->tran_time));
+			//DrawCircleEco(x, y, size, ColorAlpha(YELLOW, data->tran_time));
 
-            if (data->has_items && !data->inside_vehicle) {
+            //if (data->has_items && !data->inside_vehicle) {
-                float ix = data->x;
+            //    float ix = data->x;
-                float iy = data->y;
+            //    float iy = data->y;
-                if (data->items[data->selected_item].quantity > 0) {
+            //    if (data->items[data->selected_item].quantity > 0) {
-                    asset_id it_kind = data->items[data->selected_item].kind;
+            //        asset_id it_kind = data->items[data->selected_item].kind;
-                    uint32_t qty = data->items[data->selected_item].quantity;
+            //        uint32_t qty = data->items[data->selected_item].quantity;
-                    DrawTexturePro(GetSpriteTexture2D(assets_find(it_kind)), ASSET_SRC_RECT(), ((Rectangle){ix, iy, 32, 32}), (Vector2){0.5f,0.5f}, 0.0f, ALPHA(WHITE));
+            //        DrawTexturePro(GetSpriteTexture2D(assets_find(it_kind)), ASSET_SRC_RECT(), ((Rectangle){ix, iy, 32, 32}), (Vector2){0.5f,0.5f}, 0.0f, ALPHA(WHITE));
-                }
+            //    }
-            }
+            //}
         }break;
         case EKIND_ITEM: {
             float x = data->x - 32.f;

code/games/survival/src/system_mob.c

@@ -27,6 +27,10 @@ void MobDetectPlayers(ecs_iter_t *it) {
 	}
 }
 
+void MobDetectPlayers1(ecs_iter_t *it) {
+	MobDetectPlayers(it);
+}
+
 #define MOB_MOVEMENT_SPEED 300.0f
 
 void MobMovement(ecs_iter_t *it) {
@@ -50,7 +54,7 @@ void MobMovement(ecs_iter_t *it) {
 }
 
 #define MOB_MELEE_DIST 4000.0f
-#define MOB_MELEE_DMG 5.0f
+#define MOB_MELEE_DMG 1.5f
 #define MOB_ATK_DELAY 10 
 
 void MobMeleeAtk(ecs_iter_t *it) {
@@ -73,7 +77,7 @@ void MobMeleeAtk(ecs_iter_t *it) {
 			Health *hp = ecs_get_mut_ex(it->world, m->plr, Health);
 			hp->hp = zpl_max(hp->hp-MOB_MELEE_DMG, 0.0f);
 			ecs_add(it->world, m->plr, HealthDecreased);
+		}
 		mob[i].atk_delay = MOB_ATK_DELAY;
 	}
-	}
 }

code/games/survival/src/texgen.c

@@ -12,6 +12,7 @@ Texture2D texgen_build_anim(asset_id id, int64_t counter) {
 
 Texture2D texgen_build_sprite(asset_id id) {
     switch (id) {
+		case ASSET_PLAYER: return LoadTexEco("player");
         default: return texgen_build_sprite_fallback(id); break;
     }
 }