package sim

SIM_VERSION :: u32(1)

// The simulation owns gameplay time. Rendering may run faster, slower, or jitter,
// but every gameplay decision should eventually reduce to integer ticks at this rate.
SIM_HZ :: 60
SIM_DT :: 1.0 / f64(SIM_HZ)

// App code uses these limits when converting wall-clock frame time into sim ticks.
// They are sim constants because changing them changes replay/runtime behavior.
MAX_FRAME_DT :: 0.25
MAX_TICKS_PER_FRAME :: 5

// Seeds are part of the replay contract: same initial state, same inputs, same result.
DEFAULT_WORLD_SEED :: u64(0x7468616E61746F)

// Authoritative spatial state uses fixed-point integers. A power-of-two scale
// keeps future conversion cheap and avoids division in the simulation hot path.
FIXED_SHIFT :: 16
FIXED_ONE :: Fixed(1 << FIXED_SHIFT)

// Prototype player speed: ~8.57 whole sim units per second at 60hz.
PLAYER_MOVE_CARDINAL :: Fixed((1 << FIXED_SHIFT) / 7)
PLAYER_MOVE_DIAGONAL :: Fixed(6620) // round(PLAYER_MOVE_CARDINAL / sqrt(2))

// Fixed capacity keeps early actor iteration deterministic and cache-friendly.
// Echo caps/readability can become game rules later; this is just storage shape.
MAX_WORLD_ACTORS :: 16