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Add water checks in BFS 

Also refactor the BFS logic to generalise the next tiles to go
after the tile checks
scene_man
En Yi 2023-07-20 21:23:43 +08:00
parent 7af75b8366
commit a080b5ee0a
4 changed files with 73 additions and 36 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
scenes/engine/EC/EC.h
View File

@ -150,6 +150,7 @@ typedef enum _WaterRunnerState
typedef struct _CWaterRunner {
BFSTileMap_t bfs_tilemap;
int32_t start_height;
int32_t current_tile;
int32_t target_tile;
struct sc_queue_32 bfs_queue;

2
scenes/engine/collisions.h
View File

@ -15,7 +15,6 @@ typedef struct Tile {
SolidType_t solid;
uint8_t def;
unsigned int water_level;
unsigned int max_water_level;
struct sc_map_64v entities_set;
Vector2 offset;
Vector2 size;
@ -28,6 +27,7 @@ typedef struct TileGrid
unsigned int height;
unsigned int n_tiles;
unsigned int tile_size;
unsigned int max_water_level;
Tile_t* tiles;
}TileGrid_t;

70
scenes/water_flow.c
View File

@ -26,6 +26,7 @@ Entity_t* create_water_runner(EntityManager_t* ent_manager, int32_t width, int32
p_crunner->visited = calloc(total, sizeof(bool));
p_crunner->current_tile = start_tile;
p_crunner->start_height = start_tile / width;
p_crunner->target_tile = total;
CTransform_t* p_ct = add_component(p_filler, CTRANSFORM_COMP_T);
@ -99,6 +100,9 @@ void update_water_runner_system(Scene_t* scene)
}
memset(p_crunner->visited, 0, p_crunner->bfs_tilemap.len * sizeof(bool));
int32_t lowest_tile = p_crunner->current_tile;
p_crunner->visited[p_crunner->current_tile] = true;
p_crunner->bfs_tilemap.tilemap[p_crunner->current_tile].reachable = true;
sc_queue_add_last(&p_crunner->bfs_queue, p_crunner->current_tile);
while (!sc_queue_empty(&p_crunner->bfs_queue))
{
@ -112,52 +116,60 @@ void update_water_runner_system(Scene_t* scene)
lowest_tile = curr_idx;
}
p_crunner->visited[curr_idx] = true;
//p_crunner->visited[curr_idx] = true;
p_crunner->bfs_tilemap.tilemap[curr_idx].reachable = true;
// Possible optimisation to avoid repeated BFS, dunno how possible
unsigned int next = curr_idx + p_crunner->bfs_tilemap.width;
if (next >= p_crunner->bfs_tilemap.len) continue;
bool to_go[4] = {false, false, false, false};
Tile_t* curr_tile = tilemap.tiles + curr_idx;
unsigned int next = curr_idx + p_crunner->bfs_tilemap.width;
Tile_t* next_tile = tilemap.tiles + next;
if (
next_tile->solid != SOLID
&& next_tile->water_level < next_tile->max_water_level
&& !p_crunner->visited[next]
)
if (next < p_crunner->bfs_tilemap.len)
{
sc_queue_add_last(&p_crunner->bfs_queue, next);
p_crunner->bfs_tilemap.tilemap[next].from = curr_idx;
to_go[0] = next_tile->solid != SOLID;
}
else
if (
next_tile->solid == SOLID
|| next_tile->water_level == tilemap.max_water_level
|| curr_tile->water_level == tilemap.max_water_level
)
{
next = curr_idx - 1;
if (next % p_crunner->bfs_tilemap.width != 0)
{
next_tile = tilemap.tiles + next;
if (
next_tile->solid != SOLID
&& next_tile->water_level < next_tile->max_water_level
&& !p_crunner->visited[next]
)
{
sc_queue_add_last(&p_crunner->bfs_queue, next);
p_crunner->bfs_tilemap.tilemap[next].from = curr_idx;
}
to_go[1] = next_tile->solid != SOLID;
}
next = curr_idx + 1;
if (next % p_crunner->bfs_tilemap.width != 0)
{
next_tile = tilemap.tiles + next;
if (
next_tile->solid != SOLID
&& next_tile->water_level < next_tile->max_water_level
&& !p_crunner->visited[next]
)
{
sc_queue_add_last(&p_crunner->bfs_queue, next);
p_crunner->bfs_tilemap.tilemap[next].from = curr_idx;
}
to_go[2] = next_tile->solid != SOLID;
}
}
if (curr_tile->water_level == tilemap.max_water_level)
{
next = curr_idx - p_crunner->bfs_tilemap.width;
if (next >= 0 && next / p_crunner->bfs_tilemap.width >= p_crunner->start_height)
{
next_tile = tilemap.tiles + next;
to_go[3] = next_tile->solid != SOLID;
}
}
const int8_t offsets[4] = {p_crunner->bfs_tilemap.width, -1, 1, -p_crunner->bfs_tilemap.width};
for (uint8_t i = 0; i < 4; ++i)
{
next = curr_idx + offsets[i];
if (to_go[i] && !p_crunner->visited[next])
{
sc_queue_add_last(&p_crunner->bfs_queue, next);
p_crunner->bfs_tilemap.tilemap[next].from = curr_idx;
p_crunner->visited[next] = true;
p_crunner->bfs_tilemap.tilemap[next].reachable = true;
}
}
}

36
water_test.c
View File

@ -24,6 +24,8 @@ static GameEngine_t engine =
.assets = {0}
};
static bool water_toggle = false;
static void level_scene_render_func(Scene_t* scene)
{
LevelSceneData_t* data = &(CONTAINER_OF(scene, LevelScene_t, scene)->data);
@ -146,7 +148,7 @@ static void level_scene_render_func(Scene_t* scene)
draw_rec.y = 0;
draw_rec.height *= -1;
BeginDrawing();
ClearBackground(LIGHTGRAY);
ClearBackground( water_toggle? ColorAlpha(BLUE, 0.2) : LIGHTGRAY);
DrawTextureRec(
data->game_viewport.texture,
draw_rec,
@ -210,10 +212,28 @@ static void toggle_block_system(Scene_t* scene)
if (tile_idx == last_tile_idx) return;
if (IsMouseButtonDown(MOUSE_LEFT_BUTTON))
{
TileType_t new_type = EMPTY_TILE;
new_type = (tilemap.tiles[tile_idx].tile_type == SOLID_TILE)? EMPTY_TILE : SOLID_TILE;
if (new_type == SOLID_TILE) tilemap.tiles[tile_idx].water_level = 0;
change_a_tile(&tilemap, tile_idx, new_type);
if (!water_toggle)
{
TileType_t new_type = EMPTY_TILE;
new_type = (tilemap.tiles[tile_idx].tile_type == SOLID_TILE)? EMPTY_TILE : SOLID_TILE;
if (new_type == SOLID_TILE) tilemap.tiles[tile_idx].water_level = 0;
change_a_tile(&tilemap, tile_idx, new_type);
}
else
{
if (tilemap.tiles[tile_idx].tile_type != SOLID_TILE)
{
if (tilemap.tiles[tile_idx].water_level > 0)
{
tilemap.tiles[tile_idx].water_level = 0;
}
else
{
tilemap.tiles[tile_idx].water_level = tilemap.max_water_level;
}
}
}
last_tile_idx = tile_idx;
CWaterRunner_t* p_crunner;
sc_map_foreach_value(&scene->ent_manager.component_map[CWATERRUNNER_T], p_crunner)
@ -284,6 +304,9 @@ static void level_do_action(Scene_t* scene, ActionType_t action, bool pressed)
case ACTION_RIGHT:
p_playerstate->player_dir.x = (pressed)? 1 : 0;
break;
case ACTION_METAL_TOGGLE:
if (!pressed) water_toggle = !water_toggle;
break;
default:
break;
}
@ -331,6 +354,7 @@ int main(void)
scene.data.tilemap.width = DEFAULT_MAP_WIDTH;
scene.data.tilemap.height = DEFAULT_MAP_HEIGHT;
scene.data.tilemap.tile_size = TILE_SIZE;
scene.data.tilemap.max_water_level = 1;
scene.data.tilemap.n_tiles = scene.data.tilemap.width * scene.data.tilemap.height;
assert(scene.data.tilemap.n_tiles <= MAX_N_TILES);
scene.data.tilemap.tiles = all_tiles;
@ -340,7 +364,6 @@ int main(void)
all_tiles[i].solid = NOT_SOLID;
all_tiles[i].tile_type = EMPTY_TILE;
all_tiles[i].moveable = true;
all_tiles[i].max_water_level = 1;
sc_map_init_64v(&all_tiles[i].entities_set, 16, 0);
all_tiles[i].size = (Vector2){TILE_SIZE, TILE_SIZE};
}
@ -373,6 +396,7 @@ int main(void)
sc_map_put_64(&scene.scene.action_map, KEY_DOWN, ACTION_DOWN);
sc_map_put_64(&scene.scene.action_map, KEY_LEFT, ACTION_LEFT);
sc_map_put_64(&scene.scene.action_map, KEY_RIGHT, ACTION_RIGHT);
sc_map_put_64(&scene.scene.action_map, KEY_P, ACTION_METAL_TOGGLE);
while(true)