Implement src/engine/debuglog module that records a comprehensive
snapshot of game state every tick into a 4 MB in-memory ring buffer.
Activated by --debug-log command-line flag. Press F12 during gameplay
to dump the ring buffer to a human-readable debug_log.txt file. The
buffer also auto-flushes every 10 seconds as a safety net.
Each tick snapshot captures: input state (held/pressed/released bitmasks),
full player state (position, velocity, health, dash, aim, timers),
camera position, physics globals, level name, and a variable-length
list of all active entity positions/velocities/health.
New files:
- src/engine/debuglog.h — API and snapshot data structures
- src/engine/debuglog.c — ring buffer, record, and dump logic
Modified files:
- include/config.h — DEBUGLOG_BUFFER_SIZE constant
- src/engine/input.h/c — input_get_snapshot() to pack input bitmasks
- src/engine/core.c — debuglog_record_tick() call after update
- src/main.c — CLI flag, init/shutdown, F12 hotkey, set_level calls
Closes#19
Raise hard map size cap from 4096 to 8192 via MAX_MAP_SIZE constant.
Replace fixed 16 KB fgets buffer with dynamic line reader that handles
arbitrarily long tile rows. Check calloc returns for tile layer
allocation.
Add entity distance culling: skip updates for entities beyond 2x screen
width from camera, skip rendering beyond 64 px margin. Dead entities
bypass culling so cleanup callbacks always run. Player, spacecraft,
drone, and moving platforms set ENTITY_ALWAYS_UPDATE to opt out.
Replace naive 4-neighbor flood fill with scanline algorithm (O(height)
stack instead of O(area)) for safe use on large maps.
Raise MAX_ENTITY_SPAWNS from 128 to 512 and MAX_EXIT_ZONES from 8 to
16 to support populated large levels.
Introduce moon01.lvl as the starting level — a pure jump-and-run intro
with no gun and no enemies, just platforming over gaps and dodging falling
asteroids. The player picks up their gun upon transitioning to level01.
New features:
- Moon tileset and PARALLAX_STYLE_MOON with crater terrain backgrounds
- Asteroid entity (ENT_ASTEROID): falls from sky, damages on contact,
explodes on ground with particles, respawns after delay
- PLAYER_UNARMED directive disables gun for the level
- Pit rescue mechanic: falling costs 1 HP and auto-dashes upward
- Gun powerup entity type for future armed-pickup levels
- Segment-based procedural level generator with themed rooms
- Extended editor with entity palette and improved tile cycling
- Web shell improvements for Emscripten builds
