Unity開發詳解之射線運用(4/6)

前邊，我們已經繪製了場景和可移動的玩家對象，現在我們給玩家對象加上武器，發射子彈

創建子彈準星

 void OnGUI() {
        int size = 12;
        float posX = _camera.pixelWidth / 2 - size / 4;
        float posY = _camera.pixelHeight / 2 - size / 2;
        GUI.Label(new Rect(posX, posY, size, size), "*");
    }

創建子彈

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class PayShooter : MonoBehaviour {
    private Camera _camera;
	// Use this for initialization
	void Start () {
        _camera = GetComponent<Camera>();

        Cursor.lockState = CursorLockMode.Locked;
        Cursor.visible = false;
	}

    void OnGUI() {
        int size = 12;
        float posX = _camera.pixelWidth / 2 - size / 4;
        float posY = _camera.pixelHeight / 2 - size / 2;
        GUI.Label(new Rect(posX, posY, size, size), "*");
    }
	// Update is called once per frame
	void Update () {
        if (Input.GetMouseButtonDown(0)) {
            Vector3 point = new Vector3(_camera.pixelWidth / 2, _camera.pixelHeight / 2, 0);
            Ray ray = _camera.ScreenPointToRay(point);
            RaycastHit hit;
            if (Physics.Raycast(ray, out hit)) {
                StartCoroutine(SphereIndicator(hit.point));
            }
        }
	}
    private IEnumerator SphereIndicator(Vector3 pos) {
        GameObject sphere = GameObject.CreatePrimitive(PrimitiveType.Sphere);
        sphere.transform.position = pos;

        yield return new WaitForSeconds(1);

        Destroy(sphere);
    }
}

在下一篇，我們將創建敵人

遊戲圖示、遊戲下載、源碼下載http://blog.csdn.net/d276031034/article/details/56016801