private void deselectIconAnnotations()
{
foreach (Transform child in g_IconAnnotationsContainer.transform)
{
g_ButtonManager.ImageDeselected(child.gameObject);
}
g_SelectedElementTransform = null;
}
// Update is called once per frame
void Update()
{
// Verify that there was a touch event
if (EventSystem.current != null && Input.touchCount > 0)
{
Touch[] myTouches = Input.touches;
Vector3 touchedPoint3D = new Vector3(myTouches[0].position.x, myTouches[0].position.y, 0.0f);
//Raycasting to see if the UI was hit from the camera perspective
PointerEventData pointer = new PointerEventData(EventSystem.current);
pointer.position = Camera.main.WorldToScreenPoint(touchedPoint3D);
List <RaycastResult> raycastResults = new List <RaycastResult>();
EventSystem.current.RaycastAll(pointer, raycastResults);
// The touch was performed on an element that was part of the UI
if (raycastResults.Count > 0)
{
// The touch was performed in one of the Icon annotations
if (raycastResults[0].gameObject.transform.parent.gameObject.name == "IconAnnotationsContainer")
{
// Single touch interactions
if (Input.touchCount == 1)
{
// As soon as the touch initiates
if (myTouches[0].phase == TouchPhase.Began)
{
// Deselect all the icon annotations
foreach (Transform child in g_IconAnnotationsContainer.transform)
{
g_ButtonManager.ImageDeselected(child.gameObject);
}
// make the currently touch annotation the selected one, and change its color
g_SelectedElementTransform = raycastResults[0].gameObject.transform;
g_ButtonManager.SetObjectForColorChange(true, g_SelectedElementTransform);
}
// The finger is moving through the screen
else if (myTouches[0].phase == TouchPhase.Moved)
{
// Update the position of the annotation that is being dragged
if (g_SelectedElementTransform != null)
{
g_SelectedElementTransform.position = g_SelectedElementTransform.position + new Vector3(myTouches[0].deltaPosition.x, myTouches[0].deltaPosition.y, 0.0f);
// Stores the important info of the annotation for the JSON
List <float> annotation_information = new List <float>();
annotation_information.Add(g_SelectedElementTransform.position.x);
annotation_information.Add(g_SelectedElementTransform.position.y);
annotation_information.Add(g_SelectedElementTransform.localEulerAngles.z);
annotation_information.Add(g_SelectedElementTransform.localScale.x);
g_JsonManager.createJSONable(int.Parse(g_SelectedElementTransform.gameObject.GetComponent <Image>().name), "UpdateAnnotationCommand", null, g_SelectedElementTransform.gameObject.GetComponent <Image>().sprite.name, annotation_information);
}
}
}
// Multi finger touch performed over an icon annotation
// This could just be an else, but we are leaving it open in case of "more-than-two-touch-points" interactions
else if (Input.touchCount == 2)
{
// Find the position in the previous frame of each touch.
Vector2 touchZeroPrevPos = myTouches[0].position - myTouches[0].deltaPosition;
Vector2 touchOnePrevPos = myTouches[1].position - myTouches[1].deltaPosition;
// As soon as the touch initiates
if (myTouches[0].phase == TouchPhase.Began)
{
// Deselect all the icon annotations
foreach (Transform child in g_IconAnnotationsContainer.transform)
{
g_ButtonManager.ImageDeselected(child.gameObject);
}
// make the currently touch annotation the selected one, and change its color
g_SelectedElementTransform = raycastResults[0].gameObject.transform;
g_ButtonManager.SetObjectForColorChange(true, g_SelectedElementTransform);
}
// Zoom interaction
else if (myTouches[0].phase == TouchPhase.Moved && myTouches[1].phase == TouchPhase.Moved)
{
Vector2 prevTouchDelta = touchZeroPrevPos - touchOnePrevPos;
Vector2 touchDelta = myTouches[0].position - myTouches[1].position;
float angle = Vector2.Angle(prevTouchDelta, touchDelta);
// The angle between the vector is higher that the rotation threshold. The event is a rotation
if (angle > 0.1)
{
var LR = Vector3.Cross(prevTouchDelta, touchDelta);
if (LR.z > 0)
{
g_SelectedElementTransform.Rotate(0.0f, 0.0f, angle);
}
else
{
g_SelectedElementTransform.Rotate(0.0f, 0.0f, -1.0f * angle);
}
}
// The event is a pinch. Perform zoom.
else
{
// Find the magnitude of the vector (the distance) between the touches in each frame.
float prevTouchDeltaMag = prevTouchDelta.magnitude;
float touchDeltaMag = touchDelta.magnitude;
// Find the difference in the distances between each frame. The -10 is for scaling purposes
float deltaMagnitudeDiff = (prevTouchDeltaMag - touchDeltaMag) / -10.0f;
g_SelectedElementTransform.localScale = new Vector3(g_SelectedElementTransform.localScale.x + deltaMagnitudeDiff,
g_SelectedElementTransform.localScale.y + deltaMagnitudeDiff, g_SelectedElementTransform.localScale.z);
}
}
else if (myTouches[0].phase == TouchPhase.Ended && myTouches[1].phase == TouchPhase.Ended)
{
// Stores the important info of the annotation for the JSON
List <float> annotation_information = new List <float>();
annotation_information.Add(g_SelectedElementTransform.position.x);
annotation_information.Add(g_SelectedElementTransform.position.y);
annotation_information.Add(g_SelectedElementTransform.localEulerAngles.z);
annotation_information.Add(g_SelectedElementTransform.localScale.x);
g_JsonManager.createJSONable(int.Parse(g_SelectedElementTransform.gameObject.GetComponent <Image>().name), "UpdateAnnotationCommand", null, g_SelectedElementTransform.gameObject.GetComponent <Image>().sprite.name, annotation_information);
}
}
}
// UI Interaction. The bulk of these functions is at the ButtonClicking module
else
{
if (g_SelectedElementTransform != null)
{
// Deselect all the icon annotations
foreach (Transform child in g_IconAnnotationsContainer.transform)
{
g_ButtonManager.ImageDeselected(child.gameObject);
}
// Deselect other buttons in the panel that might have been pressed
g_ButtonManager.SetObjectForColorChange(false, g_SelectedElementTransform);
}
}
}
// Touch interaction on the background image
else
{
// Single touch interaction. These are performed to create line annotations
if (Input.touchCount == 1)
{
// Record initial touch position.
if (myTouches[0].phase == TouchPhase.Began)
{
// Deselect all the icon annotations
foreach (Transform child in g_IconAnnotationsContainer.transform)
{
g_ButtonManager.ImageDeselected(child.gameObject);
}
// Initial point for a line annotation
if (g_ButtonManager.g_LineButtonClicked)
{
resetLineAnnotation();
g_CurrentLine.Add(touchedPoint3D);
}
}
// Finger is moving through the screen as the line is being created
else if (myTouches[0].phase == TouchPhase.Moved)
{
if (g_ButtonManager.g_LineButtonClicked)
{
g_CurrentLine.Add(touchedPoint3D);
drawLine();
}
}
// The touch event finished
else if (myTouches[0].phase == TouchPhase.Ended)
{
// The touch was done to create an icon annotation. Create an icon annotation at the point of touch
if (g_ButtonManager.g_PanelButtonClicked)
{
string imageName = g_ButtonManager.UnselectPanelButton();
createIconAnnotation(touchedPoint3D, imageName);
}
// The touch has to do with line annotations
else
{
// The touch was the end of a line annotation. Create the line with the previously stores points
if (g_ButtonManager.g_LineButtonClicked)
{
g_CurrentLine.Add(touchedPoint3D);
drawLine();
g_JsonManager.createJSONable(g_AnnotationCounter, "CreateAnnotationCommand", g_CurrentLine, null, null);
g_AnnotationCounter++;
}
// The touch was done to create a point annotation. Create the point and draw it
else if (g_ButtonManager.g_PointsButtonClicked)
{
resetLineAnnotation();
createPointAnnotation(touchedPoint3D);
drawLine();
g_JsonManager.createJSONable(g_AnnotationCounter, "CreateAnnotationCommand", g_CurrentLine, null, null);
g_AnnotationCounter++;
}
}
}
}
// Multi touch interaction. These are performed to zoom the background image
// This could just be an else, but we are leaving it open in case of "more-than-two-touch-points" interactions
else if (Input.touchCount == 2)
{
}
}
}
}