1. Constants and Configuration

• Player dimensions: HEIGHT (1.8), WIDTH (0.6)
• Movement speeds: WALK, SPRINT, SNEAK, FLY
• Physics constants: JUMP_SPEED, GRAVITY, TERMINAL_VELOCITY
• MOUSE_LOOK_SENSITIVITY for camera control

2. Player State Variables

• Position-related: isJumping, yVelocity, isOnGround
• Movement modes: isFlying, isSprinting, isSneaking
• Camera control: isPointerLocked, yaw, pitch

3. Vector and Object Reuse

• Predefine reusable vectors and objects to minimize garbage collection:
  • moveVector, newPosition, slideVector, slidePosition
  • collisionNormal, groundCheck
  • playerBox, blockBox, blockPosition, matrix

4. Player Creation

• Function: createPlayer(scene)
• Creates a box geometry representing the player
• Sets initial position, shadow properties
• Adds player to the scene

5. Player Controls

• Function: addPlayerControls(player, camera, scene, canvas)
• Implements key mapping for movement and actions
• Handles mouse movement for camera rotation