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Add jetpack fuel pickup and slow base recharge to 30s

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Jetpack charges now take 30s to passively recharge (up from 3s),
making fuel management a core gameplay loop. A new fuel canister
powerup (POWERUP_FUEL) restores exactly one charge on pickup.

The existing jetpack powerup remains as the rare full-refill + 15s
boost. Fuel pickups replace most procedural jetpack spawns at higher
spawn rates to compensate for the weaker per-pickup value. Fuel
canisters also appear in corridors and arenas.

Adds orange canister pixel art, editor icon, entity registry entry,
and places fuel pickups throughout moon01.
This commit is contained in:
Thomas
2026-03-01 18:06:32 +00:00
parent fdba6ef077
commit bb0b9ddce1
11 changed files with 135 additions and 27 deletions
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31
src/game/levelgen.c
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@@ -273,11 +273,11 @@ static void gen_platforms(Tilemap *map, int x0, int w, int ground_row,
}
}
/* Jetpack refill on a high platform — reward for climbing */
if (rng_float() < 0.3f) {
/* Fuel pickup on a high platform — reward for climbing */
if (rng_float() < 0.45f) {
int top_py = ground_row - 3 - (num_plats - 1) * 3;
if (top_py >= ceil_row) {
add_entity(map, "powerup_jet", x0 + rng_range(2, w - 3), top_py - 1);
add_entity(map, "powerup_fuel", x0 + rng_range(2, w - 3), top_py - 1);
}
}
}
@@ -340,6 +340,11 @@ static void gen_corridor(Tilemap *map, int x0, int w, int ground_row,
if (difficulty > 0.3f && rng_float() < 0.35f) {
add_entity(map, "powerup_hp", x0 + w - 3, ground_row - 1);
}
/* Fuel pickup hidden in the corridor */
if (rng_float() < 0.3f) {
add_entity(map, "powerup_fuel", x0 + rng_range(2, w - 3), ceil_row + 2);
}
}
/* SEG_ARENA: wide open area, multiple enemies */
@@ -405,6 +410,8 @@ static void gen_arena(Tilemap *map, int x0, int w, int ground_row,
if (rng_float() < 0.5f) {
if (difficulty > 0.6f && rng_float() < 0.25f) {
add_entity(map, "powerup_drone", cp_x + 2, cp_y - 1);
} else if (rng_float() < 0.35f) {
add_entity(map, "powerup_fuel", cp_x + 2, cp_y - 1);
} else {
add_entity(map, "powerup_hp", cp_x + 2, cp_y - 1);
}
@@ -482,9 +489,9 @@ static void gen_shaft(Tilemap *map, int x0, int w, int ground_row,
}
}
/* Jetpack refill near the top — reward for climbing */
if (rng_float() < 0.4f) {
add_entity(map, "powerup_jet", x0 + w / 2, ceil_row + 3);
/* Fuel pickup near the top — reward for climbing */
if (rng_float() < 0.5f) {
add_entity(map, "powerup_fuel", x0 + w / 2, ceil_row + 3);
}
}
@@ -724,10 +731,10 @@ static void gen_climb(Tilemap *map, int x0, int w,
}
}
/* Powerup midway through the climb */
if (rng_float() < 0.4f) {
/* Fuel pickup midway through the climb */
if (rng_float() < 0.5f) {
int mid_y = (top_ground + bot_ground) / 2;
add_entity(map, "powerup_jet", (shaft_left + shaft_right) / 2, mid_y - 2);
add_entity(map, "powerup_fuel", (shaft_left + shaft_right) / 2, mid_y - 2);
}
}
@@ -1381,9 +1388,9 @@ static void gen_station_vent(Tilemap *map, int x0, int w, float difficulty) {
add_entity(map, "grunt", x0 + rng_range(2, w - 3), STATION_FLOOR_ROW - 1);
}
/* Jetpack refill reward (useful in low gravity) */
if (rng_float() < 0.35f) {
add_entity(map, "powerup_jet", x0 + rng_range(2, w - 3), vent_ceil + 1);
/* Fuel pickup reward (useful in low gravity) */
if (rng_float() < 0.4f) {
add_entity(map, "powerup_fuel", x0 + rng_range(2, w - 3), vent_ceil + 1);
}
}