目次
前回のチュートリアル
スクリプトの更新
スクリプトファイルを開いて下記のコードを貼り付けて保存します
Controller2D.cs
using UnityEngine; using System.Collections; [RequireComponent (typeof (BoxCollider2D))] public class Controller2D : MonoBehaviour { public LayerMask collisionMask; const float skinWidth = .015f; public int horizontalRayCount = 4; public int verticalRayCount = 4; float horizontalRaySpacing; float verticalRaySpacing; BoxCollider2D collider; RaycastOrigins raycastOrigins; public CollisionInfo collisions; void Start() { collider = GetComponent<BoxCollider2D> (); CalculateRaySpacing (); } public void Move(Vector3 velocity) { UpdateRaycastOrigins (); collisions.Reset (); if (velocity.x != 0) { HorizontalCollisions (ref velocity); } if (velocity.y != 0) { VerticalCollisions (ref velocity); } transform.Translate (velocity); } void HorizontalCollisions(ref Vector3 velocity) { float directionX = Mathf.Sign (velocity.x); float rayLength = Mathf.Abs (velocity.x) + skinWidth; for (int i = 0; i < horizontalRayCount; i ++) { Vector2 rayOrigin = (directionX == -1)?raycastOrigins.bottomLeft:raycastOrigins.bottomRight; rayOrigin += Vector2.up * (horizontalRaySpacing * i); RaycastHit2D hit = Physics2D.Raycast(rayOrigin, Vector2.right * directionX, rayLength, collisionMask); Debug.DrawRay(rayOrigin, Vector2.right * directionX * rayLength,Color.red); if (hit) { velocity.x = (hit.distance - skinWidth) * directionX; rayLength = hit.distance; collisions.left = directionX == -1; collisions.right = directionX == 1; } } } void VerticalCollisions(ref Vector3 velocity) { float directionY = Mathf.Sign (velocity.y); float rayLength = Mathf.Abs (velocity.y) + skinWidth; for (int i = 0; i < verticalRayCount; i ++) { Vector2 rayOrigin = (directionY == -1)?raycastOrigins.bottomLeft:raycastOrigins.topLeft; rayOrigin += Vector2.right * (verticalRaySpacing * i + velocity.x); RaycastHit2D hit = Physics2D.Raycast(rayOrigin, Vector2.up * directionY, rayLength, collisionMask); Debug.DrawRay(rayOrigin, Vector2.up * directionY * rayLength,Color.red); if (hit) { velocity.y = (hit.distance - skinWidth) * directionY; rayLength = hit.distance; collisions.below = directionY == -1; collisions.above = directionY == 1; } } } void UpdateRaycastOrigins() { Bounds bounds = collider.bounds; bounds.Expand (skinWidth * -2); raycastOrigins.bottomLeft = new Vector2 (bounds.min.x, bounds.min.y); raycastOrigins.bottomRight = new Vector2 (bounds.max.x, bounds.min.y); raycastOrigins.topLeft = new Vector2 (bounds.min.x, bounds.max.y); raycastOrigins.topRight = new Vector2 (bounds.max.x, bounds.max.y); } void CalculateRaySpacing() { Bounds bounds = collider.bounds; bounds.Expand (skinWidth * -2); horizontalRayCount = Mathf.Clamp (horizontalRayCount, 2, int.MaxValue); verticalRayCount = Mathf.Clamp (verticalRayCount, 2, int.MaxValue); horizontalRaySpacing = bounds.size.y / (horizontalRayCount - 1); verticalRaySpacing = bounds.size.x / (verticalRayCount - 1); } struct RaycastOrigins { public Vector2 topLeft, topRight; public Vector2 bottomLeft, bottomRight; } public struct CollisionInfo { public bool above, below; public bool left, right; public void Reset() { above = below = false; left = right = false; } } }
Player.cs
using UnityEngine; using System.Collections; [RequireComponent (typeof (Controller2D))] public class Player : MonoBehaviour { public float jumpHeight = 4; public float timeToJumpApex = .4f; float accelerationTimeAirborne = .2f; float accelerationTimeGrounded = .1f; float moveSpeed = 6; float gravity; float jumpVelocity; Vector3 velocity; float velocityXSmoothing; Controller2D controller; void Start() { controller = GetComponent<Controller2D> (); gravity = -(2 * jumpHeight) / Mathf.Pow (timeToJumpApex, 2); jumpVelocity = Mathf.Abs(gravity) * timeToJumpApex; print ("Gravity: " + gravity + " Jump Velocity: " + jumpVelocity); } void Update() { if (controller.collisions.above || controller.collisions.below) { velocity.y = 0; } Vector2 input = new Vector2 (Input.GetAxisRaw ("Horizontal"), Input.GetAxisRaw ("Vertical")); if (Input.GetKeyDown (KeyCode.Space) && controller.collisions.below) { velocity.y = jumpVelocity; } float targetVelocityX = input.x * moveSpeed; velocity.x = Mathf.SmoothDamp (velocity.x, targetVelocityX, ref velocityXSmoothing, (controller.collisions.below)?accelerationTimeGrounded:accelerationTimeAirborne); velocity.y += gravity * Time.deltaTime; controller.Move (velocity * Time.deltaTime); } }
動作確認
スクリプトを更新してゲームを再生してスペースキーを押すと、
プレイヤーがジャンプすることが確認できます