# ports.ludic - what the aim asks the game: the camera, the ground, and where the body stands.
# Unbound, a camera 1.5 m up at the origin looks down -z over flat ground, with the body under it.
export port AimView {
  x: fn() -> float = fn aim__zero
  y: fn() -> float = fn aim__eye
  z: fn() -> float = fn aim__zero
  fx: fn() -> float = fn aim__zero
  fy: fn() -> float = fn aim__zero
  fz: fn() -> float = fn aim__ahead
  fov: fn() -> float = fn aim__fov              # vertical, radians
  ground: fn(float, float) -> float = fn aim__flat
  dry: fn(float, float) -> bool = fn aim__dry   # land, for the probe's viewpoints
  body_x: fn() -> float = fn aim__zero          # distances and reach are the body's, not the camera's
  body_z: fn() -> float = fn aim__zero
}

function aim__zero() -> float { return 0.0 }
function aim__eye() -> float { return 1.5 }
function aim__ahead() -> float { return -1.0 }
function aim__fov() -> float { return 1.0 }
function aim__flat(x: float, z: float) -> float { return 0.0 }
function aim__dry(x: float, z: float) -> bool { return true }