public bool DeleteLastSample(int index)
{
bool isDeleted = gr.deleteGestureSample(index, gr.getGestureNumberOfSamples(index) - 1);
if (isDeleted)
{
gestureList[index].SampleCount--;
}
Debug.Log($"{gr.getGestureNumberOfSamples(index)}");
return(isDeleted);
}
// Update:
void Update()
{
if (this.gr == null && this.gc == null)
{
HUDText.text = "Welcome to MARUI Gesture Plug-in!\n"
+ "This manager allows you to create and record gestures,\n"
+ "and organize gesture files.\n"
+ "Please use the Inspector for the XR rig.\n"
+ "[Currently, no gesture recognition object is created].";
return;
}
if (training_started)
{
if ((this.gr != null && this.gr.isTraining()) || (this.gc != null && this.gc.isTraining()))
{
HUDText.text = "Currently training...\n"
+ "Current recognition performance: " + (this.last_performance_report * 100).ToString() + "%.\n"
+ "You can stop training in the Inspector for the XR rig.\n";
return;
}
else
{
training_started = false;
HUDText.text = "Training finished!\n"
+ "Final recognition performance: " + (this.last_performance_report * 100).ToString() + "%.\n";
}
}
float trigger_left = Input.GetAxis("LeftControllerTrigger");
float trigger_right = Input.GetAxis("RightControllerTrigger");
// Single Gesture recognition / 1-handed operation
if (this.gr != null)
{
// If the user is not yet dragging (pressing the trigger) on either controller, he hasn't started a gesture yet.
if (active_controller == null)
{
// If the user presses either controller's trigger, we start a new gesture.
if (trigger_right > 0.85)
{
// Right controller trigger pressed.
active_controller = GameObject.Find("Right Hand");
}
else if (trigger_left > 0.85)
{
// Left controller trigger pressed.
active_controller = GameObject.Find("Left Hand");
}
else
{
// If we arrive here, the user is pressing neither controller's trigger:
// nothing to do.
return;
}
// If we arrive here: either trigger was pressed, so we start the gesture.
GameObject hmd = GameObject.Find("Main Camera"); // alternative: Camera.main.gameObject
Vector3 hmd_p = hmd.transform.position;
Quaternion hmd_q = hmd.transform.rotation;
gr.startStroke(hmd_p, hmd_q, record_gesture_id);
return;
}
// If we arrive here, the user is currently dragging with one of the controllers.
// Check if the user is still dragging or if he let go of the trigger button.
if (trigger_left > 0.85 || trigger_right > 0.85)
{
// The user is still dragging with the controller: continue the gesture.
Vector3 p = active_controller.transform.position;
Quaternion q = active_controller.transform.rotation;
gr.contdStrokeQ(p, q);
addToStrokeTrail(p);
return;
}
// else: if we arrive here, the user let go of the trigger, ending a gesture.
active_controller = null;
// Delete the objectes that we used to display the gesture.
foreach (string star in stroke)
{
Destroy(GameObject.Find(star));
stroke_index = 0;
}
double similarity = 0; // This will receive the similarity value (0~1)
Vector3 pos = Vector3.zero; // This will receive the position where the gesture was performed.
double scale = 0; // This will receive the scale at which the gesture was performed.
Vector3 dir0 = Vector3.zero; // This will receive the primary direction in which the gesture was performed (greatest expansion).
Vector3 dir1 = Vector3.zero; // This will receive the secondary direction of the gesture.
Vector3 dir2 = Vector3.zero; // This will receive the minor direction of the gesture (direction of smallest expansion).
int gesture_id = gr.endStroke(ref similarity, ref pos, ref scale, ref dir0, ref dir1, ref dir2);
// If we are currently recording samples for a custom gesture, check if we have recorded enough samples yet.
if (record_gesture_id >= 0)
{
// Currently recording samples for a custom gesture - check how many we have recorded so far.
HUDText.text = "Recorded a gesture sample for " + gr.getGestureName(record_gesture_id) + ".\n"
+ "Total number of recorded samples for this gesture: " + gr.getGestureNumberOfSamples(record_gesture_id) + ".\n"
+ "You can stop recording samples in the Inspector for the XR rig.\n";
return;
}
// else: if we arrive here, we're not recording new samples,
// but instead have identified a gesture.
if (gesture_id < 0)
{
// Error trying to identify any gesture
HUDText.text = "Failed to identify gesture.";
}
else
{
string gesture_name = gr.getGestureName(gesture_id);
HUDText.text = "Identified gesture " + gesture_name + "(" + gesture_id + ")\n(Similarity: " + similarity + ")";
}
return;
}
// GestureCombination recognition / 2-handed operation
if (this.gc != null)
{
// If the user presses either controller's trigger, we start a new gesture.
if (trigger_pressed_left == false && trigger_left > 0.9)
{
// Controller trigger pressed.
trigger_pressed_left = true;
GameObject hmd = GameObject.Find("Main Camera"); // alternative: Camera.main.gameObject
Vector3 hmd_p = hmd.transform.position;
Quaternion hmd_q = hmd.transform.rotation;
int gesture_id = -1;
if (record_combination_id >= 0)
{
gesture_id = gc.getCombinationPartGesture(record_combination_id, lefthand_combination_part);
}
gc.startStroke(lefthand_combination_part, hmd_p, hmd_q, gesture_id);
gesture_started = true;
}
if (trigger_pressed_right == false && trigger_right > 0.9)
{
// Controller trigger pressed.
trigger_pressed_right = true;
GameObject hmd = GameObject.Find("Main Camera"); // alternative: Camera.main.gameObject
Vector3 hmd_p = hmd.transform.position;
Quaternion hmd_q = hmd.transform.rotation;
int gesture_id = -1;
if (record_combination_id >= 0)
{
gesture_id = gc.getCombinationPartGesture(record_combination_id, righthand_combination_part);
}
gc.startStroke(righthand_combination_part, hmd_p, hmd_q, gesture_id);
gesture_started = true;
}
if (gesture_started == false)
{
// nothing to do.
return;
}
// If we arrive here, the user is currently dragging with one of the controllers.
if (trigger_pressed_left == true)
{
if (trigger_left < 0.85)
{
// User let go of a trigger and held controller still
gc.endStroke(lefthand_combination_part);
trigger_pressed_left = false;
}
else
{
// User still dragging or still moving after trigger pressed
GameObject left_hand = GameObject.Find("Left Hand");
gc.contdStrokeQ(lefthand_combination_part, left_hand.transform.position, left_hand.transform.rotation);
// Show the stroke by instatiating new objects
addToStrokeTrail(left_hand.transform.position);
}
}
if (trigger_pressed_right == true)
{
if (trigger_right < 0.85)
{
// User let go of a trigger and held controller still
gc.endStroke(righthand_combination_part);
trigger_pressed_right = false;
}
else
{
// User still dragging or still moving after trigger pressed
GameObject right_hand = GameObject.Find("Right Hand");
gc.contdStrokeQ(righthand_combination_part, right_hand.transform.position, right_hand.transform.rotation);
// Show the stroke by instatiating new objects
addToStrokeTrail(right_hand.transform.position);
}
}
if (trigger_pressed_left || trigger_pressed_right)
{
// User still dragging with either hand - nothing left to do
return;
}
// else: if we arrive here, the user let go of both triggers, ending the gesture.
gesture_started = false;
// Delete the objectes that we used to display the gesture.
foreach (string star in stroke)
{
Destroy(GameObject.Find(star));
stroke_index = 0;
}
double similarity = 0; // This will receive a similarity value (0~1).
int recognized_combination_id = gc.identifyGestureCombination(ref similarity);
// If we are currently recording samples for a custom gesture, check if we have recorded enough samples yet.
if (record_combination_id >= 0)
{
// Currently recording samples for a custom gesture - check how many we have recorded so far.
int connected_gesture_id_left = gc.getCombinationPartGesture(record_combination_id, lefthand_combination_part);
int connected_gesture_id_right = gc.getCombinationPartGesture(record_combination_id, righthand_combination_part);
int num_samples_left = gc.getGestureNumberOfSamples(lefthand_combination_part, connected_gesture_id_left);
int num_samples_right = gc.getGestureNumberOfSamples(righthand_combination_part, connected_gesture_id_right);
// Currently recording samples for a custom gesture - check how many we have recorded so far.
HUDText.text = "Recorded a gesture sample for " + gc.getGestureCombinationName(record_combination_id) + ".\n"
+ "Total number of recorded samples for this gesture: " + num_samples_left + " left / " + num_samples_right + " right.\n"
+ "You can stop recording samples in the Inspector for the XR rig.\n";
return;
}
// else: if we arrive here, we're not recording new samples for custom gestures,
// but instead have identified a new gesture.
// Perform the action associated with that gesture.
if (recognized_combination_id < 0)
{
// Error trying to identify any gesture
HUDText.text = "Failed to identify gesture.";
}
else
{
string combination_name = gc.getGestureCombinationName(recognized_combination_id);
HUDText.text = "Identified gesture combination '" + combination_name + "' (" + recognized_combination_id + ")\n(Similarity: " + similarity + ")";
}
}
}
// Update:
void Update()
{
if (Input.touchCount > 0)
{
Touch touch = Input.GetTouch(0);
Vector2 touch_pos = touch.position;
Resolution res = Screen.currentResolution;
touch_pos.x = touch_pos.x / res.width;
touch_pos.y = touch_pos.y / res.height;
if (touch.phase == TouchPhase.Began)
{
if (touch_pos.x > 0.1f && touch_pos.x < 0.9f)
{
button_state = ButtonState_Pressed;
if (touch_pos.y > 0.3f && touch_pos.y < 0.7f)
{
button_id = ButtonID_Record;
}
else if (touch_pos.y > 0.8f)
{
button_id = ButtonID_Train;
}
else if (touch_pos.y < 0.2f)
{
button_id = ButtonID_Exit;
}
}
}
else if (touch.phase == TouchPhase.Ended)
{
button_state = ButtonState_Released;
}
}
else
{
button_id = ButtonID_None;
button_state = ButtonState_Idle;
}
float escape = Input.GetAxis("escape");
if (escape > 0.0f)
{
Application.Quit();
}
if (button_id == ButtonID_Exit && button_state == ButtonState_Released)
{
Application.Quit();
}
// If recording_gesture is -3, that means that the AI has recently finished learning a new gesture.
if (recording_gesture == -3)
{
// Save the data to file.
#if UNITY_EDITOR
string save_file_path = "Assets/GestureRecognition";
#elif UNITY_ANDROID
string save_file_path = Application.persistentDataPath;
#else
string save_file_path = Application.streamingAssetsPath;
#endif
this.gr.saveToFile(save_file_path + "/gestures.dat");
// Show "finished" message.
double performance = gr.recognitionScore();
HUDText.text = "Training finished!\n(Performance = " + (performance * 100.0) + "%)\n\n[TOUCH AND HOLD HERE]\nto perform a gesture\n";
// Set recording_gesture to -1 to indicate normal operation (learning finished).
recording_gesture = -1;
}
// If recording_gesture is -2, that means that the AI is currently learning a new gesture.
if (recording_gesture == -2)
{
// Show "please wait" message
HUDText.text = "[TOUCH HERE]\nto stop training\n\n\n\n\n\n\n...training...\n\n(" + (last_performance_report * 100.0) + " %)\n\n\n\n\n";
if (button_id == ButtonID_Train && button_state == ButtonState_Released)
{
// Button pressed: stop the learning process.
gr.stopTraining();
}
return;
}
// Else: if we arrive here, we're not in training/learning mode,
// so the user can draw gestures.
// If recording_gesture is -1, we're currently not recording a new gesture.
if (recording_gesture == -1)
{
if (button_id == ButtonID_Train && button_state == ButtonState_Released)
{
string random_word = getRandomWord();
recording_gesture = gr.createGesture(random_word);
// from now on: recording a new gesture
HUDText.text = "Learning a new gesture.\nKeyword:\n'" + random_word + "'\n\n[TOUCH AND HOLD HERE]\nto record gesture sample\n\n\n";
return;
}
}
// If the user is not yet dragging (pressing the trigger) on either controller, he hasn't started a gesture yet.
if (button_id == ButtonID_Record)
{
if (!making_stroke)
{
// If we arrive here: either trigger was pressed, so we start the gesture.
Vector3 hmd_p = new Vector3(0.0f, 0.0f, 0.0f);
Quaternion hmd_q = new Quaternion(0.0f, 0.0f, 0.0f, 1.0f);
gr.startStroke(hmd_p, hmd_q, recording_gesture);
making_stroke = true;
RenderSettings.skybox.SetColor("_Tint", new Color(0.53f, 0.17f, 0.17f, 1.0f));
HUDText.text = "Hold and move phone\nto make a gesture.\n\n\n\n";
}
// the user is dragging with the controller: continue the gesture.
// Get phone position / motion:
Vector3 p = Input.gyro.userAcceleration;
// We could also sample over all recent acceleration events as a
/*
* Vector3 p = new Vector3(0.0f, 0.0f, 0.0f);
* if (Input.accelerationEventCount > 1)
* {
* foreach (AccelerationEvent acc_event in Input.accelerationEvents)
* {
* p += acc_event.acceleration * acc_event.deltaTime;
* }
* } else
* {
* p = Input.acceleration;
* }
*/
// We use the
//Vector3 p = Input.gyro.gravity;
// Get phone rotation / orientation:
// When using Input.gyro.attitude, the compass reading is included in the phone's orientation.
// That means that a gesture performed northward can be a different gesture from the
// same motion performed southwards. Usually, this is not what people expect,
// so we're using "gravity" instead to detect the phone's orientation.
// Quaternion q = Input.gyro.attitude;
// As an alternative, we can calculate the phone's orientation from the gravity ("down" vector).
Quaternion q = Quaternion.FromToRotation(new Vector3(0, 1, 0), Input.gyro.gravity);
// Or we can use the rotational acceleration directly as a pseudo orientation.
// Quaternion q = Quaternion.FromToRotation(new Vector3(1, 0, 0), Input.gyro.rotationRateUnbiased);
HUDText.text = "acc=\n" + Input.gyro.userAcceleration.x.ToString("0.00") + " " + Input.gyro.userAcceleration.y.ToString("0.00") + " " + Input.gyro.userAcceleration.z.ToString("0.00") + "\n"
+ "grav=\n" + Input.gyro.gravity.x.ToString("0.00") + " " + Input.gyro.gravity.y.ToString("0.00") + " " + Input.gyro.gravity.z.ToString("0.00");
gr.contdStrokeQ(p, q);
return;
}
if (making_stroke && button_id == ButtonID_None)
{
double similarity = 0; // This will receive a value of how similar the performed gesture was to previous recordings.
Vector3 pos = Vector3.zero; // This will receive the position where the gesture was performed.
double scale = 0; // This will receive the scale at which the gesture was performed.
Vector3 dir0 = Vector3.zero; // This will receive the primary direction in which the gesture was performed (greatest expansion).
Vector3 dir1 = Vector3.zero; // This will receive the secondary direction of the gesture.
Vector3 dir2 = Vector3.zero; // This will receive the minor direction of the gesture (direction of smallest expansion).
int gesture_id = gr.endStroke(ref similarity, ref pos, ref scale, ref dir0, ref dir1, ref dir2);
RenderSettings.skybox.SetColor("_Tint", new Color(0.5f, 0.5f, 0.5f, 1.0f));
if (recording_gesture >= 0)
{
int num_samples = gr.getGestureNumberOfSamples(recording_gesture);
string gesture_name = gr.getGestureName(recording_gesture);
HUDText.text = "[TOUCH HERE]\nto stop recording samples\nand start training the AI\n\n\n\n\n[TOUCH AND HOLD HERE]\nto record gesture sample.\n" + num_samples
+ " samples recorded\n(record at least 20)\n\nGesture keyword:\n" + gesture_name + "\n";
}
else
{
string gesture_name = gr.getGestureName(gesture_id);
HUDText.text = "[TOUCH HERE]\nto record a new gesture\n\n\n\n\n\n\n[TOUCH AND HOLD HERE]\nto perform a gesture\n\n\n identified gesture: \n " + gesture_name + "\n\n\n[TOUCH HERE TO EXIT]";
}
making_stroke = false;
return;
}
//
if (button_id == ButtonID_Train && button_state == ButtonState_Released)
{
// Currently recording samples for a custom gesture - check how many we have recorded so far.
// Enough samples recorded. Start the learning process.
HUDText.text = "Learning gestures...";
// Set up the call-backs to receive information about the learning process.
gr.setTrainingUpdateCallback(trainingUpdateCallback);
gr.setTrainingUpdateCallbackMetadata((IntPtr)me);
gr.setTrainingFinishCallback(trainingFinishCallback);
gr.setTrainingFinishCallbackMetadata((IntPtr)me);
gr.setMaxTrainingTime(20);
// Set recording_gesture to -2 to indicate that we're currently in learning mode.
recording_gesture = -2;
if (gr.startTraining() == false)
{
HUDText.text = "Failed to start training";
}
return;
}
}
// Update:
void Update()
{
float escape = Input.GetAxis("escape");
if (escape > 0.0f)
{
Application.Quit();
}
float trigger_left = Input.GetAxis("LeftControllerTrigger");
float trigger_right = Input.GetAxis("RightControllerTrigger");
// If recording_gesture is -3, that means that the AI has recently finished learning a new gesture.
if (recording_gesture == -3)
{
// Show "finished" message.
double performance = gr.recognitionScore();
HUDText.text = "Training finished!\n(Final recognition performance = " + (performance * 100.0) + "%)\nFeel free to use your new gesture.";
// Set recording_gesture to -1 to indicate normal operation (learning finished).
recording_gesture = -1;
}
// If recording_gesture is -2, that means that the AI is currently learning a new gesture.
if (recording_gesture == -2)
{
// Show "please wait" message
HUDText.text = "...training...\n(Current recognition performance = " + (last_performance_report * 100.0) + "%)\nPress the 'A'/'X'/Menu button to cancel training.";
// In this mode, the user may press the "A/X/menu" button to cancel the learning process.
bool button_a_left = Input.GetButton("LeftControllerButtonA");
bool button_a_right = Input.GetButton("RightControllerButtonA");
/*
* if (button_a_left || button_a_right) {
* // Button pressed: stop the learning process.
* gr.stopTraining();
* recording_gesture = -3;
* }
*/
return;
}
// Else: if we arrive here, we're not in training/learning mode,
// so the user can draw gestures.
// If recording_gesture is -1, we're currently not recording a new gesture.
if (recording_gesture == -1)
{
bool button_a_left = Input.GetButton("LeftControllerButtonA");
bool button_a_right = Input.GetButton("RightControllerButtonA");
// In this mode, the user can press button A/X/menu to create a new gesture
if (button_a_left || button_a_right)
{
recording_gesture = gr.createGesture("custom gesture " + (gr.numberOfGestures() - 3));
// from now on: recording a new gesture
HUDText.text = "Learning a new gesture (custom gesture " + (recording_gesture - 4) + "):\nPlease perform the gesture 25 times.\n(0 / 25)";
}
}
// If the user is not yet dragging (pressing the trigger) on either controller, he hasn't started a gesture yet.
if (active_controller == null)
{
// If the user presses either controller's trigger, we start a new gesture.
if (trigger_right > 0.8)
{
// Right controller trigger pressed.
active_controller = GameObject.Find("Right Hand");
}
else if (trigger_left > 0.8)
{
// Left controller trigger pressed.
active_controller = GameObject.Find("Left Hand");
}
else
{
// If we arrive here, the user is pressing neither controller's trigger:
// nothing to do.
return;
}
// If we arrive here: either trigger was pressed, so we start the gesture.
GameObject hmd = GameObject.Find("Main Camera"); // alternative: Camera.main.gameObject
Vector3 hmd_p = hmd.transform.localPosition;
Quaternion hmd_q = hmd.transform.localRotation;
gr.startStroke(hmd_p, hmd_q, recording_gesture);
}
// If we arrive here, the user is currently dragging with one of the controllers.
// Check if the user is still dragging or if he let go of the trigger button.
if (trigger_left > 0.3 || trigger_right > 0.3)
{
// The user is still dragging with the controller: continue the gesture.
Vector3 p = active_controller.transform.position;
Quaternion q = active_controller.transform.rotation;
gr.contdStroke(p, q);
// Show the stroke by instatiating new objects
GameObject star_instance = Instantiate(GameObject.Find("star"));
GameObject star = new GameObject("stroke_" + stroke_index++);
star_instance.name = star.name + "_instance";
star_instance.transform.SetParent(star.transform, false);
System.Random random = new System.Random();
star.transform.localPosition = new Vector3(p.x + (float)random.NextDouble() / 80, p.y + (float)random.NextDouble() / 80, p.z + (float)random.NextDouble() / 80);
star.transform.localRotation = new Quaternion((float)random.NextDouble() - 0.5f, (float)random.NextDouble() - 0.5f, (float)random.NextDouble() - 0.5f, (float)random.NextDouble() - 0.5f).normalized;
//star.transform.localRotation.Normalize();
float star_scale = (float)random.NextDouble() + 0.3f;
star.transform.localScale = new Vector3(star_scale, star_scale, star_scale);
stroke.Add(star.name);
return;
}
// else: if we arrive here, the user let go of the trigger, ending a gesture.
active_controller = null;
// Delete the objectes that we used to display the gesture.
foreach (string star in stroke)
{
Destroy(GameObject.Find(star));
stroke_index = 0;
}
double similarity = 0; // This will receive a value of how similar the performed gesture was to previous recordings.
Vector3 pos = Vector3.zero; // This will receive the position where the gesture was performed.
double scale = 0; // This will receive the scale at which the gesture was performed.
Vector3 dir0 = Vector3.zero; // This will receive the primary direction in which the gesture was performed (greatest expansion).
Vector3 dir1 = Vector3.zero; // This will receive the secondary direction of the gesture.
Vector3 dir2 = Vector3.zero; // This will receive the minor direction of the gesture (direction of smallest expansion).
int gesture_id = gr.endStroke(ref similarity, ref pos, ref scale, ref dir0, ref dir1, ref dir2);
// if (similarity < ???) {
// ...maybe this is not the gesture I was looking for...
// }
// If we are currently recording samples for a custom gesture, check if we have recorded enough samples yet.
if (recording_gesture >= 0)
{
// Currently recording samples for a custom gesture - check how many we have recorded so far.
int num_samples = gr.getGestureNumberOfSamples(recording_gesture);
if (num_samples < 25)
{
// Not enough samples recorded yet.
HUDText.text = "Learning a new gesture (custom gesture " + (recording_gesture - 3) + "):\nPlease perform the gesture 25 times.\n(" + num_samples + " / 25)";
}
else
{
// Enough samples recorded. Start the learning process.
HUDText.text = "Learning gestures - please wait...\n(press A/X/menu button to stop the learning process)";
// Set up the call-backs to receive information about the learning process.
gr.setTrainingUpdateCallback(trainingUpdateCallback);
gr.setTrainingUpdateCallbackMetadata((IntPtr)me);
gr.setTrainingFinishCallback(trainingFinishCallback);
gr.setTrainingFinishCallbackMetadata((IntPtr)me);
gr.setMaxTrainingTime(10000);
// Set recording_gesture to -2 to indicate that we're currently in learning mode.
recording_gesture = -2;
if (gr.startTraining() == false)
{
Debug.Log("COULD NOT START TRAINING");
}
}
return;
}
// else: if we arrive here, we're not recording new sampled for custom gestures,
// but instead have identified a new gesture.
// Perform the action associated with that gesture.
if (gesture_id < 0)
{
// Error trying to identify any gesture
HUDText.text = "Failed to identify gesture.";
}
else if (gesture_id == 0)
{
// "loop"-gesture: create cylinder
HUDText.text = "Identified a CIRCLE/LOOP gesture!";
GameObject cylinder = Instantiate(GameObject.Find("controller_dummy"));
cylinder.transform.localPosition = pos;
cylinder.transform.localRotation = Quaternion.FromToRotation(new Vector3(0, 1, 0), dir2);
cylinder.transform.localScale = new Vector3((float)scale * 2, (float)scale, (float)scale * 2);
created_objects.Add(cylinder);
}
else if (gesture_id == 1)
{
// "swipe left"-gesture: rotate left
HUDText.text = "Identified a SWIPE LEFT gesture!";
GameObject closest_object = getClosestObject(pos);
if (closest_object != null)
{
closest_object.transform.Rotate(new Vector3(0, 1, 0), (float)scale * 400, Space.World);
}
}
else if (gesture_id == 2)
{
// "swipe right"-gesture: rotate right
HUDText.text = "Identified a SWIPE RIGHT gesture!";
GameObject closest_object = getClosestObject(pos);
if (closest_object != null)
{
closest_object.transform.Rotate(new Vector3(0, 1, 0), -(float)scale * 400, Space.World);
}
}
else if (gesture_id == 3)
{
// "shake" or "scrap" gesture: delete closest object
HUDText.text = "Identified a SHAKE gesture!";
GameObject closest_object = getClosestObject(pos);
if (closest_object != null)
{
Destroy(closest_object);
created_objects.Remove(closest_object);
}
}
else if (gesture_id == 4)
{
// "draw sword" gesture
HUDText.text = "MAGIC!";
Color col = RenderSettings.skybox.GetColor("_Tint");
if (col.r < 0.51)
{
RenderSettings.skybox.SetColor("_Tint", new Color(0.53f, 0.17f, 0.17f, 1.0f));
}
else // reset the tint
{
RenderSettings.skybox.SetColor("_Tint", new Color(0.5f, 0.5f, 0.5f, 1.0f));
}
}
else
{
// Other ID: one of the user-registered gestures:
HUDText.text = "Identified custom registered gesture " + (gesture_id - 4);
}
}
// Update:
void Update()
{
float escape = Input.GetAxis("escape");
if (escape > 0.0f)
{
Application.Quit();
}
float trigger_left = Input.GetAxis("LeftControllerTrigger");
float trigger_right = Input.GetAxis("RightControllerTrigger");
bool button_a_left = Input.GetButton("LeftControllerButtonA");
bool button_a_right = Input.GetButton("RightControllerButtonA");
if (button_a_pressed)
{
if (!button_a_left && !button_a_right)
{
button_a_pressed = false;
}
return;
}
// If recording_gesture is -3, that means that the AI has recently finished learning a new gesture.
if (recording_gesture == -3)
{
// Save the data to file.
#if UNITY_EDITOR
string GesturesFilePath = "Assets/GestureRecognition";
#elif UNITY_ANDROID
string GesturesFilePath = Application.persistentDataPath;
#else
string GesturesFilePath = Application.streamingAssetsPath;
#endif
if (this.SaveGesturesFile == null)
{
this.SaveGesturesFile = "Sample_Continuous_MyRecordedGestures.dat";
}
this.gr.saveToFile(GesturesFilePath + "/" + this.SaveGesturesFile);
// Show "finished" message.
double performance = gr.recognitionScore();
HUDText.text = "Training finished!\n(Final recognition performance = " + (performance * 100.0) + "%)\nFeel free to use your new gesture.";
// Set recording_gesture to -1 to indicate normal operation (learning finished).
recording_gesture = -1;
return;
}
// If recording_gesture is -2, that means that the AI is currently learning a new gesture.
if (recording_gesture == -2)
{
// Show "please wait" message
HUDText.text = "...training...\n(Current recognition performance = " + (last_performance_report * 100.0) + "%)\nPress the 'A'/'X'/Menu button to stop training.";
// In this mode, the user may press the "A/X/menu" button to cancel the learning process.
if (button_a_left || button_a_right)
{
// Button pressed: stop the learning process.
gr.stopTraining();
button_a_pressed = true;
}
return;
}
// Else: if we arrive here, we're not in training/learning mode,
// so the user can draw gestures.
if (button_a_left || button_a_right)
{
button_a_pressed = true;
// If recording_gesture is -1, we're currently not recording a new gesture.
if (recording_gesture == -1)
{
// In this mode, the user can press button A/X/menu to create a new gesture
recording_gesture = gr.createGesture("Your gesture #" + (gr.numberOfGestures() - 4));
// from now on: recording a new gesture
HUDText.text = "Learning a new gesture (" + (gr.getGestureName(recording_gesture)) + "):\nPlease perform the gesture for a while.\n(0 samples recorded)";
gr.contdIdentificationPeriod = (int)(this.GesturePeriod * 1000.0f); // to milliseconds
}
else
{
HUDText.text = "Learning gestures - please wait...\n(press A/X/menu button to stop the learning process)";
// Set up the call-backs to receive information about the learning process.
gr.setTrainingUpdateCallback(trainingUpdateCallback);
gr.setTrainingUpdateCallbackMetadata((IntPtr)me);
gr.setTrainingFinishCallback(trainingFinishCallback);
gr.setTrainingFinishCallbackMetadata((IntPtr)me);
gr.setMaxTrainingTime(30);
// Set recording_gesture to -2 to indicate that we're currently in learning mode.
recording_gesture = -2;
if (gr.startTraining() == false)
{
Debug.Log("COULD NOT START TRAINING");
}
}
return;
}
// If the user is not yet dragging (pressing the trigger) on either controller, he hasn't started a gesture yet.
if (active_controller == null)
{
// If the user presses either controller's trigger, we start a new gesture.
if (trigger_right > 0.9)
{
// Right controller trigger pressed.
active_controller = GameObject.Find("Right Hand");
}
else if (trigger_left > 0.9)
{
// Left controller trigger pressed.
active_controller = GameObject.Find("Left Hand");
}
else
{
// If we arrive here, the user is pressing neither controller's trigger:
// nothing to do.
return;
}
// If we arrive here: either trigger was pressed, so we start the gesture.
gr.contdIdentificationPeriod = (int)(this.GesturePeriod * 1000.0f); // to milliseconds
GameObject hmd = GameObject.Find("Main Camera"); // alternative: Camera.main.gameObject
Vector3 hmd_p = hmd.transform.position;
Quaternion hmd_q = hmd.transform.rotation;
gr.startStroke(hmd_p, hmd_q, recording_gesture);
this.stroke_start_time = Time.time;
}
double similarity = -1.0; // This will receive a value of how similar the performed gesture was to previous recordings.
int gesture_id = -1; // This will receive the ID of the gesture.
// If we arrive here, the user is currently dragging with one of the controllers.
// Check if the user is still dragging or if he let go of the trigger button.
if (trigger_left > 0.85 || trigger_right > 0.85)
{
Vector3 p = active_controller.transform.position;
Quaternion q = active_controller.transform.rotation;
gr.contdStrokeQ(p, q);
// The user is still dragging with the controller: continue the gesture.
if (Time.time - this.stroke_start_time > GesturePeriod && Time.time - this.last_recognition_time > RecognitionInterval)
{
GameObject hmd = GameObject.Find("Main Camera"); // alternative: Camera.main.gameObject
Vector3 hmd_p = hmd.transform.position;
Quaternion hmd_q = hmd.transform.rotation;
if (recording_gesture >= 0)
{
gr.contdRecord(hmd_p, hmd_q);
int num_samples = gr.getGestureNumberOfSamples(recording_gesture);
HUDText.text = "Learning a new gesture (" + (gr.getGestureName(recording_gesture)) + ").\n\n(" + num_samples + " samples recorded)";
}
else
{
gesture_id = gr.contdIdentify(hmd_p, hmd_q, ref similarity);
if (gesture_id >= 0)
{
string gesture_name = gr.getGestureName(gesture_id);
HUDText.text = "Identifying gesture '" + gesture_name + "'.\n\n(similarity: " + similarity + "%)";
}
}
this.last_recognition_time = Time.time;
}
// Prune the stroke of all items that are too old to be used
float cutoff_time = Time.time - GesturePeriod;
while (stroke.Count > 0 && stroke[0].time < cutoff_time)
{
GameObject star_object = GameObject.Find(stroke[0].name);
if (star_object != null)
{
Destroy(star_object);
}
stroke.RemoveAt(0);
}
// Extend the stroke by instatiating new objects
stroke.Add(new StrokePoint(p));
return;
}
// else: if we arrive here, the user let go of the trigger, ending a gesture.
active_controller = null;
gr.cancelStroke();
// Delete the objects that we used to display the gesture.
foreach (StrokePoint star in stroke)
{
GameObject star_object = GameObject.Find(star.name);
if (star_object != null)
{
Destroy(star_object);
}
}
stroke.Clear();
// If we are currently recording samples for a custom gesture, check if we have recorded enough samples yet.
if (recording_gesture >= 0)
{
// Currently recording samples for a custom gesture - check how many we have recorded so far.
int num_samples = gr.getGestureNumberOfSamples(recording_gesture);
HUDText.text = "Learning a new gesture (" + (gr.getGestureName(recording_gesture)) + "):\n"
+ "Please perform the gesture for a while.\n(" + num_samples + " samples recorded)\n"
+ "\nor: press 'A'/'X'/Menu button\nto finish recording and start training.";
return;
}
// else: if we arrive here, we're not recording new sampled for custom gestures,
// but instead have identified a new gesture.
// Perform the action associated with that gesture.
HUDText = GameObject.Find("HUDText").GetComponent <Text>();
HUDText.text = "Hold the trigger to draw gestures.\nAvailable gestures:";
for (int i = 0; i < gr.numberOfGestures(); i++)
{
HUDText.text += "\n" + (i + 1) + " : " + gr.getGestureName(i);
}
HUDText.text += "\nor: press 'A'/'X'/Menu button\nto create new gesture.";
}
