/**
* Estimate the 3D position (in unity units) of a point on the camera feed, optionally filtering
* the results by the source of information that is used to estimate the 3d position. If no
* types are specified, all hit test results are returned.
*
* X and Y are specified as numbers between 0 and 1, where (0, 0) is the upper left corner and
* (1, 1) is the lower right corner of the camera feed as rendered in the camera that was
* specified with UpdateCameraProjectionMatrix.
*
* Mutltiple 3d position esitmates may be returned for a single hit test based on the source
* of data being used to estimate the position. The data source that was used to estimate the
* position is indicated by the XRHitTestResult.Type.
*
* Example usage:
*
* List<XRHitTestResult> hits = new List<XRHitTestResult>();
* List<XRHitTestResult.Type> types = new List<XRHitTestResult.Type>();
* types.Add(XRHitTestResult.Type.DETECTED_SURFACE);
* if (Input.touchCount != 0) {
* var t = Input.GetTouch(0);
* if (t.phase == TouchPhase.Began) {
* float x = t.position.x / Screen.width;
* float y = (Screen.height - t.position.y) / Screen.height;
* hits.AddRange(xr.HitTest(x, y, types));
* }
* }
*/
public List <XRHitTestResult> HitTest(float x, float y, List <XRHitTestResult.Type> includedTypes)
{
MessageBuilder queryMessage = new MessageBuilder();
var query = queryMessage.initRoot(XrQueryRequest.factory);
var ht = query.getHitTest();
ht.setX(x);
ht.setY(y);
if (includedTypes.Count > 0)
{
query.getHitTest().initIncludedTypes(includedTypes.Count);
for (int i = 0; i < includedTypes.Count; ++i)
{
var type = includedTypes[i];
switch (type)
{
case XRHitTestResult.Type.FEATURE_POINT:
ht.getIncludedTypes().set(i, XrHitTestResult.ResultType.FEATURE_POINT);
break;
case XRHitTestResult.Type.ESTIMATED_SURFACE:
ht.getIncludedTypes().set(i, XrHitTestResult.ResultType.ESTIMATED_SURFACE);
break;
case XRHitTestResult.Type.DETECTED_SURFACE:
ht.getIncludedTypes().set(i, XrHitTestResult.ResultType.DETECTED_SURFACE);
break;
default:
// pass
break;
}
}
}
var response = bridge.Query(queryMessage);
List <XRHitTestResult> results = new List <XRHitTestResult>();
foreach (var hit in response.getHitTest().getHits())
{
var type = XRHitTestResult.Type.UNSPECIFIED;
switch (hit.getType())
{
case XrHitTestResult.ResultType.FEATURE_POINT:
type = XRHitTestResult.Type.FEATURE_POINT;
break;
case XrHitTestResult.ResultType.ESTIMATED_SURFACE:
type = XRHitTestResult.Type.ESTIMATED_SURFACE;
break;
case XrHitTestResult.ResultType.DETECTED_SURFACE:
type = XRHitTestResult.Type.DETECTED_SURFACE;
break;
default:
type = XRHitTestResult.Type.UNSPECIFIED;
break;
}
Vector3 position = new Vector3(
hit.getPlace().getPosition().getX(),
hit.getPlace().getPosition().getY(),
hit.getPlace().getPosition().getZ());
Quaternion rotation = new Quaternion(
hit.getPlace().getRotation().getX(),
hit.getPlace().getRotation().getY(),
hit.getPlace().getRotation().getZ(),
hit.getPlace().getRotation().getW());
float distance = hit.getDistance();
results.Add(new XRHitTestResult(type, position, rotation, distance));
}
return(results);
}
