void Start()
{
targetHeight = mImgTarget.GetSize()[1];
targetWidth = mImgTarget.GetSize()[0];
ptTopRight = new Vector3(0.5f * (targetWidth / targetHeight), 0, 0.5f);
ptTopLeft = new Vector3(-0.5f * (targetWidth / targetHeight), 0, 0.5f);
ptBottomRight = new Vector3(0.5f * (targetWidth / targetHeight), 0, -0.5f);
ptBottomLeft = new Vector3(-0.5f * (targetWidth / targetHeight), 0, -0.5f);
mTrackableBehaviour = GetComponent <TrackableBehaviour>();
if (mTrackableBehaviour)
{
mTrackableBehaviour.RegisterTrackableEventHandler(this);
}
}
// Update is called once per frame
void Update()
{
if (mImageTargetBehaviour == null)
{
Debug.Log("ImageTargetBehaviour not found");
return;
}
Vector2 targetSize = mImageTargetBehaviour.GetSize();
float targetAspect = targetSize.x / targetSize.y;
// We define a point in the target local reference
// we take the bottom-left corner of the target,
// just as an example
// Note: the target reference plane in Unity is X-Z,
// while Y is the normal direction to the target plane
Vector3 pointOnTarget = new Vector3(-0.5f, 0, -0.5f / targetAspect);
// We convert the local point to world coordinates
Vector3 targetPointInWorldRef = transform.TransformPoint(pointOnTarget);
// We project the world coordinates to screen coords (pixels)
Vector3 screenPoint = Camera.main.WorldToScreenPoint(targetPointInWorldRef);
world_x = targetPointInWorldRef.x;
world_y = targetPointInWorldRef.y;
world_z = targetPointInWorldRef.z;
screen_x = screenPoint.x;
screen_y = screenPoint.y;
}
private void fitToTarget(Transform fittee, Vuforia.ImageTargetBehaviour imgTarget, float scale)
{
// Get image targe size
Vector2 imgTargetSize = imgTarget.GetSize();
float imgTargetWidth = imgTargetSize.x;
float imgTargetHeight = imgTargetSize.y;
// Scale plane to image target size
fittee.transform.localScale = new Vector3(
imgTargetWidth * scale,
1f * scale,
imgTargetHeight * scale);
}
/// <summary>
/// Instantiates a new user-defined target and is also responsible for dispatching callback to
/// IUserDefinedTargetEventHandler::OnNewTrackableSource
/// </summary>
public void BuildNewTarget()
{
if (mFrameQuality == ImageTargetBuilder.FrameQuality.FRAME_QUALITY_MEDIUM ||
mFrameQuality == ImageTargetBuilder.FrameQuality.FRAME_QUALITY_HIGH)
{
// create the name of the next target.
// the TrackableName of the original, linked ImageTargetBehaviour is extended with a continuous number to ensure unique names
string targetName = string.Format("{0}-{1}", ImageTargetTemplate.TrackableName, mTargetCounter);
// generate a new target:
mTargetBuildingBehaviour.BuildNewTarget(targetName, ImageTargetTemplate.GetSize().x);
UIManager.ShowMessage("专家来了！");
}
else
{
Debug.Log("Cannot build new target, due to poor camera image quality");
UIManager.ShowErrorMessage("当前画面信息量太低！");
}
}
