Turn movement into an interaction

Use typed hooks for startup, frames, input, and level results. Match each level result to the request that created it. Handle OnLevelFailed with a message the player can read.

These snippets extend a controller with a loaded camera. Add these fields to your Game:

status string
nearGoal, won bool

After creating the camera, check its starting position and subscribe to later accepted poses. Registration alone does not call the callback.

updateGoal := func(position engine.Vec3) {
    dx, dy := position.X-6, position.Y-6
    game.nearGoal = dx*dx+dy*dy < 1
}
updateGoal(game.camera.Settings().Position)
_, err := game.WatchPose(game.camera.Ref(), func(pose engine.Transform3D) {
    // The host has applied collision and portal movement.
    updateGoal(pose.Position)
})
if err != nil {
    game.status = err.Error()
}

Propose movement from camera.Settings(), which the engine keeps synchronized automatically with the accepted pose. Do not accumulate a separate guessed player position.

The position check defines a one-metre trigger around (6, 6). Call this method from your existing OnKeyDown handler to finish when the player presses E there. Keep the movement handler in that hook too.

func (game *Game) onKeyDown(key engine.Key) {
    if key == engine.KeyE && game.nearGoal && !game.won {
        game.won = true
        game.status = "You made it!"
    }
}

Draw status in your HUD; invalidate it when the value changes if using KartUI. Reset won when starting again. Reset held controls in OnInputReset so losing focus does not leave the player moving.

Tags identify actors; they do not automatically create proximity events. Query actors after the level is ready, and keep trigger checks in your game. For longer scripted interactions, use typed actions and StartAuthoredSequence; start with a direct Go handler first.