unity3d鼠标跟随代码杂集

var depth = 10.0; var go:gameObject; function Start () { Screen.showCursor = false; } function Update () { var mousePos = Input.mousePosition; var wantedPos = Camera.main.ScreenToWorldPoint (Vector3 (mousePos.x, mousePos.y, depth)); print(wantedPos); } //------------------------------------------- function Update () { } var screenSpace; var offset; function OnMouseDown(){ //translate the cubes position from the world to Screen Point screenSpace = Camera.main.WorldToScreenPoint(transform.position); //calculate any difference between the cubes world position and the mouses Screen position converted to a world point offset = transform.position - Camera.main.ScreenToWorldPoint(Vector3(Input.mousePosition.x,Input.mousePosition.y, screenSpace.z)); } /* OnMouseDrag is called when the user has clicked on a GUIElement or Collider and is still holding down the mouse. OnMouseDrag is called every frame while the mouse is down. */ function OnMouseDrag () { //keep track of the mouse position var curScreenSpace = Vector3(Input.mousePosition.x, Input.mousePosition.y, screenSpace.z); //convert the screen mouse position to world point and adjust with offset var curPosition = Camera.main.ScreenToWorldPoint(curScreenSpace) + offset; //update the position of the object in the world transform.position = curPosition; } //======================================== /* Notes: This script should be attached to the camera, so we can use the "camera" member variable with needing a "FindCamera" script. */ using UnityEngine; using System.Collections; public class ChickenMove : MonoBehaviour { Vector3 origPos, curMousePos; GameObject chicken; void Update() { // Make sure the user pressed the mouse down if (!Input.GetMouseButtonDown(0)) return; curMousePos = camera.ScreenToWorldPoint(new Vector3(Input.mousePosition.x, Input.mousePosition.y, 0)); // Position relative to the eye-point of the camera curMousePos -= transform.position; // We need to actually hit an object RaycastHit hit; // BJL: If we use a collider instead of a rigidbody and the distance parameter is too large, we'll get a hit all the time. // Could this be due to reflection or because the camera is orthographic, or...? if (!Physics.Raycast(camera.ScreenPointToRay(Input.mousePosition), out hit, 100)) return; // We need to hit a rigidbody. if (!hit.rigidbody) return; chicken = hit.rigidbody.gameObject; origPos = chicken.transform.position; StartCoroutine ("DragObject"); } IEnumerator DragObject() { while (Input.GetMouseButton (0)) { // Position on the near clipping plane of the camera in world space Vector3 newMousePos = camera.ScreenToWorldPoint(new Vector3(Input.mousePosition.x, Input.mousePosition.y, 0)); // Position relative to the eye-point of the camera newMousePos -= transform.position; chicken.transform.Translate(curMousePos - newMousePos); curMousePos = newMousePos; yield return 0; } chicken.transform.position = origPos; chicken = null; } } //下面这几段独立代码经检验可用=========================================== 版本１：可改进 // CursorIcon.js // Place this script onto the model you want to follow the cursor around. enum Type {X, Y, XandY} var type = Type.XandY; // This is only used if you are using Type.Y. It is the x position of it. var xSpot = 0.0; // This is always used. var depth = 0.0; // This is only used if you are using Type.X. It is the y position of it. var height = 0.0; private var helperCollider : GameObject; function Start () { Screen.showCursor = false; helperCollider = GameObject ("HelperCollider"); helperCollider.AddComponent (BoxCollider); helperCollider.collider.isTrigger = true; helperCollider.transform.localScale = Vector3 (50, 50, 0); helperCollider.transform.parent = camera.main.transform; helperCollider.transform.position = Vector3 (0, 0, depth); if (collider) Destroy (collider); } function Update () { var ray : Ray = camera.main.ScreenPointToRay (Input.mousePosition); var hit : RaycastHit; if (Physics.Raycast (ray, hit)) { if (hit.collider == helperCollider.collider) { if (type == Type.X) transform.position = Vector3 (hit.point.x, height, depth); else if (type == Type.Y) transform.position = Vector3 (xSpot, hit.point.y, depth); else transform.position = Vector3 (hit.point.x, hit.point.y, depth); } } } 版本２：简洁 var distanceFromCamera : float; private var X : int; private var Y : int; // position a 3D object where the mouse cursor would be function Update () { Screen.showCursor = false; X = Input.mousePosition.x; Y = Input.mousePosition.y; transform.position = camera.main.ScreenToWorldPoint(Vector3(X,Y,distanceFromCamera)); } 版本３：１与２的结合 enum Type {X, Y, XandY} var type = Type.XandY; // This number ranges between 0 and 1. // 1 is at the right of the screen, and 0 is a the left of the screen. // This is only used if you are using Type.Y. var xOffset = 0.5; // This number ranges between 0 and 1. // 1 is at the top of the screen, and 0 is a the bottom of the screen. // This is only used if you are using Type.X. var height = 0.5; // This is the z distance from the camera. var depth = 10.0; function Start () { Screen.showCursor = false; } function Update () { var x = Input.mousePosition.x; var y = Input.mousePosition.y; var mainCam = camera.main; if (type == Type.X) transform.position = mainCam.ScreenToWorldPoint (Vector3 (x, height * Screen.height, depth)); else if (type == Type.Y) transform.position = mainCam.ScreenToWorldPoint (Vector3 (0, y, depth)); else transform.position = mainCam.ScreenToWorldPoint (Vector3 (x, y, depth)); height = Mathf.Clamp01 (height); xOffset = Mathf.Clamp01 (xOffset); }