package sim

// Fixed is the authoritative numeric type for sim-space positions. Keeping this
// distinct from raw integers makes accidental mixing of pixels, ticks, and fixed
// simulation units a compile-time error instead of a replay bug.
Fixed :: distinct i32

// Vec2_Fixed stores replay-relevant positions and deltas. It is deliberately
// integer-only; rendering can convert to floats later at the sim/render boundary.
Vec2_Fixed :: struct {
	x: Fixed,
	y: Fixed,
}

// Vec2_Q is reserved for quantized command vectors such as aim/controller input.
// It keeps persistent commands compact and canonical without storing floats.
Vec2_Q :: struct {
	x: i16,
	y: i16,
}

// Convert whole simulation units into the fixed-point representation. This is a
// shift because FIXED_ONE is a power of two, avoiding multiplication/division.
fixed_from_whole :: proc(value: i32) -> Fixed {
	return Fixed(value << FIXED_SHIFT)
}