Restore camera controller

entities/player/PlayerCamera.gd

@@ -1,6 +1,28 @@
 class_name PlayerCamera extends Node
 
+const CAMERA_PIXELS_PER_UNIT = 32.0
+const CAMERA_PIXEL_SCALE = 1.0
+
 @export var camera:Camera3D = null
+@export var target:Node3D = null
 
 func _process(delta: float) -> void:
-	pass
+	# I tried a few things but this is most consistent for both backbuffer and
+	# framebuffer viewports.
+	var viewportHeight = get_viewport().get_visible_rect().size.y;
+	var unitScale = CAMERA_PIXEL_SCALE * CAMERA_PIXELS_PER_UNIT;
+
+	var z:float = (
+		tan((deg_to_rad(180) - deg_to_rad(camera.fov)) / 2.0) *
+		(viewportHeight / 2.0)
+	) / unitScale;
+	
+	var look = target.global_position;
+	var position = Vector3(0, 0, 2) + look;
+
+	camera.look_at_from_position(
+		Vector3(position.x, position.y + z, position.z),
+		look
+	);
+
+	pass