72 lines
2.2 KiB
Markdown
72 lines
2.2 KiB
Markdown
# lockstep artillery - build roadmap
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## phase 1: foundation
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- [x] set up build.zig with raylib-zig dependency
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- [x] create fixed-point math module (Fixed struct, add/sub/mul/div)
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- [x] create trig lookup tables (sin/cos at comptime)
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- [x] basic window opens with raylib
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## phase 2: single-player simulation
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- [ ] define GameState, Player, Projectile structs
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- [ ] terrain generation (random jagged line)
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- [ ] cannon aiming (angle adjustment with keys)
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- [ ] power adjustment
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- [ ] fire projectile
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- [ ] projectile physics (gravity, movement)
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- [ ] terrain collision detection
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- [ ] player hit detection
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- [ ] turn switching after shot resolves
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## phase 3: rendering
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- [ ] draw terrain as connected line segments
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- [ ] draw players as geometric shapes
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- [ ] draw cannon angle indicator
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- [ ] draw power meter
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- [ ] draw projectile with trail (last N positions)
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- [ ] implement bloom shader (blur.fs)
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- [ ] render-to-texture pipeline for glow effect
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- [ ] explosion effect (expanding circle)
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## phase 4: local two-player
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- [ ] split keyboard input (player 1: wasd+space, player 2: arrows+enter)
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- [ ] verify determinism by running two simulations side-by-side
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- [ ] add checksum verification
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## phase 5: networking
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- [ ] UDP socket wrapper (bind, send, receive)
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- [ ] define packet format (INPUT, SYNC, PING, PONG)
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- [ ] host mode: listen for connection, send initial SYNC
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- [ ] guest mode: connect, receive SYNC, start simulation
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- [ ] input exchange each frame
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- [ ] handle packet loss (resend on timeout)
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- [ ] checksum exchange and desync detection
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- [ ] latency display
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## phase 6: polish
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- [ ] wind indicator
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- [ ] health bars
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- [ ] win/lose screen
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- [ ] rematch option
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- [ ] sound effects (optional, breaks no-dependency purity)
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## known pitfalls to watch
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- [ ] don't use floats in simulation
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- [ ] don't iterate hashmaps
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- [ ] don't use @sin/@cos - use lookup tables
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- [ ] always process inputs in same order (player 0 then player 1)
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- [ ] serialize terrain heights as fixed-point, not float
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## stretch goals
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- [ ] destructible terrain (explosion removes pixels)
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- [ ] multiple weapon types
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- [ ] rollback netcode (predict, rewind, replay on correction)
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- [ ] replay file save/load
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- [ ] web build via emscripten
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