Unity3D物理射线和碰撞..doc

1 Camera：包含两个方法跟射线有关系 using UnityEngine; using System.Collections; public class example : MonoBehaviour { void Update() { Ray ray = camera.ScreenPointToRay(new Vector3(200, 200, 0)); Debug.DrawRay(ray.origin, ray.direction * 10, Color.yellow); } } using UnityEngine; using System.Collections; public class example : MonoBehaviour { void Update() { Ray ray = camera.ViewportPointToRay(new Vector3(0.5F, 0.5F, 0)); RaycastHit hit; if (Physics.Raycast(ray, out hit)) print(Im looking at + hit.transform.name); else print(Im looking at nothing!); } } 2 Collider：有一个方法 // pragma below is needed due to a UnityJS issue //下面的代码运行于js #pragma strict function Update(){ var ray : Ray = Camera.main.ScreenPointToRay (Input.mousePosition); var hit : RaycastHit; if (collider.Raycast (ray, hit, 100.0)) { Debug.DrawLine (ray.origin, hit.point); } } 3 Debug：绘制射线 using UnityEngine; using System.Collections; public class example : MonoBehaviour { void Update() { Vector3 forward = transform.TransformDirection(Vector3.forward) * 10; Debug.DrawRay(transform.position, forward, Color.green); } } using UnityEngine; using System.Collections; public class example : MonoBehaviour { void OnCollisionEnter(Collision collision) { foreach (ContactPoint contact in collision.contacts) { Debug.DrawRay(contact.point, contact.normal, Color.green, 2); } } } 4 Gizmos：辅助线框的方法 using UnityEngine; using System.Collections; public class example : MonoBehaviour { void OnDrawGizmosSelected() { Gizmos.color = Color.red; Vector3 direction = transform.TransformDirection(Vector3.forward) * 5; Gizmos.DrawRay(transform.position, direction); } } 5 Physics：物理学里的多个方法，跟射线有关的碰撞 using UnityEngine; using System.Collections; public class example : MonoBehaviour { void Update() { RaycastHit[] hit