FocusSquare
ARPlaneAnchor
首先,您可以添加
Transform
FocusSquare Class
//The Transform Of Our Model To Place
public Transform modelToPlace;
然后添加一个布尔值以确定是否已放置模型,例如:
//Boolean Determining Whether Our Model Has Been Placed
public bool modelPlaced = false;
FocusSquare类
public class FocusSquare : MonoBehaviour {
public enum FocusState {
Initializing,
Finding,
Found
}
public GameObject findingSquare;
public GameObject foundSquare;
//The Transform Of Our Model To Place
public Transform modelToPlace;
//Boolean Determining Whether Our Model Has Been Placed
public bool modelPlaced = false;
public float maxRayDistance = 30.0f;
public LayerMask collisionLayerMask;
public float findingSquareDist = 0.5f;
private FocusState squareState;
public FocusState SquareState {
get {
return squareState;
}
set {
squareState = value;
foundSquare.SetActive (squareState == FocusState.Found);
findingSquare.SetActive (squareState != FocusState.Found);
}
}
bool trackingInitialized;
//------------------
//MARK: - Life Cycle
//------------------
void Start () {
SquareState = FocusState.Initializing;
trackingInitialized = true;
}
void Update () {
//If Our Model Hasnt Been Placed Continue Updating The Focus Square
if (!modelPlaced) {
Vector3 center = new Vector3 (Screen.width / 2, Screen.height / 2, findingSquareDist);
var screenPosition = Camera.main.ScreenToViewportPoint (center);
ARPoint point = new ARPoint {
x = screenPosition.x,
y = screenPosition.y
};
//We Only Want To Place A Model When The Focus Square Has Detected An ARPlance Acnhor
ARHitTestResultType[] resultTypes = {
ARHitTestResultType.ARHitTestResultTypeExistingPlaneUsingExtent,
};
foreach (ARHitTestResultType resultType in resultTypes) {
if (HitTestWithResultType (point, resultType)) {
SquareState = FocusState.Found;
return;
}
}
//No ARPlaneAnchor Has Been Detected So Continue Updating The Focus Square
if (trackingInitialized) {
SquareState = FocusState.Finding;
if (Vector3.Dot (Camera.main.transform.forward, Vector3.down) > 0) {
findingSquare.transform.position = Camera.main.ScreenToWorldPoint (center);
Vector3 vecToCamera = findingSquare.transform.position - Camera.main.transform.position;
Vector3 vecOrthogonal = Vector3.Cross (vecToCamera, Vector3.up);
Vector3 vecForward = Vector3.Cross (vecOrthogonal, Vector3.up);
findingSquare.transform.rotation = Quaternion.LookRotation (vecForward, Vector3.up);
} else {
findingSquare.SetActive (false);
}
}
} else {
//Our Model Has Been Placed So Disable The Focus Square
findingSquare.SetActive (false);
foundSquare.SetActive (false);
}
}
/// Performs An SCNHitTest For Any Detected ARPlaneAnchore
bool HitTestWithResultType (ARPoint point, ARHitTestResultType resultTypes)
{
List<ARHitTestResult> hitResults = UnityARSessionNativeInterface.GetARSessionNativeInterface ().HitTest (point, resultTypes);
if (hitResults.Count > 0) {
foreach (var hitResult in hitResults) {
foundSquare.transform.position = UnityARMatrixOps.GetPosition (hitResult.worldTransform);
foundSquare.transform.rotation = UnityARMatrixOps.GetRotation (hitResult.worldTransform);
Debug.Log (string.Format ("x:{0:0.######} y:{1:0.######} z:{2:0.######}", foundSquare.transform.position.x, foundSquare.transform.position.y, foundSquare.transform.position.z));
//An ARPlaneAnchor Has Been Detected So Position Our Model & Set Our Boolean To Indicate It Has Been Placed
if (!modelPlaced) {
modelToPlace.transform.position = UnityARMatrixOps.GetPosition (hitResult.worldTransform);
modelToPlace.transform.rotation = UnityARMatrixOps.GetRotation (hitResult.worldTransform);
modelPlaced = true;
}
return true;
}
}
return false;
}
}
希望这能为你指明正确的方向…
