Re-add back TileComponent

Changelog:
- Remember the purpose of this component, which is to assist
  updating which tiles is containing the entity

components.h

@@ -3,11 +3,12 @@
 #include "raylib.h"
 // TODO: Look at sc to use macros to auto generate functions
 
-#define N_COMPONENTS 4
+#define N_COMPONENTS 5
 enum ComponentEnum
 {
     CBBOX_COMP_T,
     CTRANSFORM_COMP_T,
+    CTILECOORD_COMP_T,
     CJUMP_COMP_T,
     CPLAYERSTATE_T
 };

mempool.c

@@ -6,6 +6,7 @@
 static Entity_t entity_buffer[MAX_COMP_POOL_SIZE];
 static CBBox_t bbox_buffer[MAX_COMP_POOL_SIZE];
 static CTransform_t ctransform_buffer[MAX_COMP_POOL_SIZE];
+static CTileCoord_t ctilecoord_buffer[MAX_COMP_POOL_SIZE];
 static CJump_t cjump_buffer[1]; // Only player is expected to have this
 static CPlayerState_t cplayerstate_buffer[1]; // Only player is expected to have this
 
@@ -29,6 +30,7 @@ static MemPool_t comp_mempools[N_COMPONENTS] =
 {
     {bbox_buffer, MAX_COMP_POOL_SIZE, sizeof(CBBox_t), NULL, {0}},
     {ctransform_buffer, MAX_COMP_POOL_SIZE, sizeof(CTransform_t), NULL, {0}},
+    {ctilecoord_buffer, MAX_COMP_POOL_SIZE, sizeof(CTileCoord_t), NULL, {0}},
     {cjump_buffer, 1, sizeof(CJump_t), NULL, {0}},
     {cplayerstate_buffer, 1, sizeof(CPlayerState_t), NULL, {0}},
 };

scene_impl.c

@@ -9,7 +9,7 @@ static const Vector2 TILE_SZ = {TILE_SIZE, TILE_SIZE};
 static Tile_t all_tiles[MAX_N_TILES] = {0};
 
 static const Vector2 GRAVITY = {0, GRAV_ACCEL};
-static const Vector2 UPTHRUST = {0, -GRAV_ACCEL * 0.7};
+static const Vector2 UPTHRUST = {0, -GRAV_ACCEL * 1.1};
 
 static inline unsigned int get_tile_idx(int x, int y, unsigned int tilemap_width)
 {
@@ -638,6 +638,49 @@ static void player_collision_system(Scene_t *scene)
     }
 
 }
+static void update_tilemap_system(Scene_t *scene)
+{
+    LevelSceneData_t *data = (LevelSceneData_t *)scene->scene_data;
+    TileGrid_t tilemap = data->tilemap;
+
+    Entity_t *p_ent;
+    sc_map_foreach_value(&scene->ent_manager.entities, p_ent)
+    {
+        CTileCoord_t * p_tilecoord = get_component(&scene->ent_manager, p_ent, CTILECOORD_COMP_T);
+        if (p_tilecoord == NULL) continue;
+        CTransform_t * p_ctransform = get_component(&scene->ent_manager, p_ent, CTRANSFORM_COMP_T);
+        if (p_ctransform == NULL) continue;
+        CBBox_t * p_bbox = get_component(&scene->ent_manager, p_ent, CBBOX_COMP_T);
+        if (p_bbox == NULL) continue;
+
+        // Update tilemap position
+        for (size_t i=0;i<p_tilecoord->n_tiles;++i)
+        {
+            // Use previously store tile position
+            // Clear from those positions
+            unsigned int tile_idx = p_tilecoord->tiles[i];
+            sc_map_del_64(&(tilemap.tiles[tile_idx].entities_set), p_ent->m_id);
+        }
+        p_tilecoord->n_tiles = 0;
+
+        // Compute new occupied tile positions and add
+        // Extend the check by a little to avoid missing
+        unsigned int tile_x1 = (p_ctransform->position.x) / TILE_SIZE;
+        unsigned int tile_y1 = (p_ctransform->position.y) / TILE_SIZE;
+        unsigned int tile_x2 = (p_ctransform->position.x + p_bbox->size.x) / TILE_SIZE;
+        unsigned int tile_y2 = (p_ctransform->position.y + p_bbox->size.y) / TILE_SIZE;
+
+        for (unsigned int tile_y=tile_y1; tile_y <= tile_y2; tile_y++)
+        {
+            for (unsigned int tile_x=tile_x1; tile_x <= tile_x2; tile_x++)
+            {
+                unsigned int tile_idx = tile_y * tilemap.width + tile_x;
+                p_tilecoord->tiles[p_tilecoord->n_tiles++] = tile_idx;
+                sc_map_put_64(&(tilemap.tiles[tile_idx].entities_set), p_ent->m_id, 0);
+            }
+        }
+    }
+}
 
 static void toggle_block_system(Scene_t *scene)
 {
@@ -714,7 +757,7 @@ void init_level_scene(LevelScene_t *scene)
     sc_array_add(&scene->scene.systems, &player_movement_input_system);
     sc_array_add(&scene->scene.systems, &player_bbox_update_system);
     sc_array_add(&scene->scene.systems, &movement_update_system);
-    //sc_array_add(&scene->scene.systems, &update_tilemap_system);
+    sc_array_add(&scene->scene.systems, &update_tilemap_system);
     sc_array_add(&scene->scene.systems, &player_collision_system);
     sc_array_add(&scene->scene.systems, &player_ground_air_transition_system);
     sc_array_add(&scene->scene.systems, &toggle_block_system);

scene_test.c

@@ -24,6 +24,7 @@ int main(void)
     p_cjump->jumps = 1;
     p_cjump->max_jumps = 1;
     add_component(&scene.scene.ent_manager, p_ent, CPLAYERSTATE_T);
+    add_component(&scene.scene.ent_manager, p_ent, CTILECOORD_COMP_T);
     update_entity_manager(&scene.scene.ent_manager);
     //for (size_t step = 0; step < 6000; step++)
     while(true)