add package files

com.htc.upm.vive.openxr/OpenXRFacialTracking/Samples~/Scripts/Lip/Lip.cs

@@ -0,0 +1,71 @@
+//========= Copyright 2019, HTC Corporation. All rights reserved. ===========
+using System;
+using System.Collections.Generic;
+using System.Runtime.InteropServices;
+using UnityEngine;
+using UnityEngine.XR.OpenXR;
+namespace VIVE
+{
+    namespace FacialTracking.Sample
+    {
+        public class Lip
+        {
+            public const int WeightingCount = (int)XrLipShapeHTC.XR_LIP_SHAPE_MAX_ENUM_HTC;
+            private static int LastUpdateFrame = -1;
+            private static Error LastUpdateResult = Error.FAILED;
+            private static Dictionary<XrLipShapeHTC, float> Weightings;
+            private static float[] blendshapes = new float[60];
+            private static XrFacialExpressionsHTC LipExpression;
+
+            static Lip()
+            {
+                Weightings = new Dictionary<XrLipShapeHTC, float>();
+                for (int i = 0; i < WeightingCount; ++i) Weightings.Add((XrLipShapeHTC)i, 0.0f);
+            }
+
+            private static bool UpdateData()
+            {
+                if (Time.frameCount == LastUpdateFrame) return LastUpdateResult == Error.WORK;
+                else LastUpdateFrame = Time.frameCount;
+                LipExpression.expressionCount = 60; 
+                LipExpression.type = XrStructureType.XR_TYPE_FACIAL_EXPRESSIONS_HTC;
+                LipExpression.blendShapeWeightings = Marshal.AllocCoTaskMem(sizeof(float)* LipExpression.expressionCount);
+                var feature = OpenXRSettings.Instance.GetFeature<VIVE_FacialTracking_OpenXR_API>();
+                int res = feature.xrGetFacialExpressionsHTC(OpenXRSettings.Instance.GetFeature<VIVE_FacialTracking_OpenXR_API>().m_expressionHandle_Lip, ref LipExpression);
+                    
+
+                if(res == (int)XrResult.XR_SUCCESS)
+                {
+                    LastUpdateResult = Error.WORK;
+                    Marshal.Copy(LipExpression.blendShapeWeightings, blendshapes,0, LipExpression.expressionCount);
+                    for (int i = 0; i < WeightingCount; ++i)
+                    {
+                        Weightings[(XrLipShapeHTC)(i)] = blendshapes[i];
+                    }
+
+                }
+                else
+                {
+                    LastUpdateResult = Error.FAILED;
+                }
+                return LastUpdateResult == Error.WORK;
+            }
+
+            /// <summary>
+            /// Gets weighting values from Lip module.
+            /// </summary>
+            /// <param name="shapes">Weighting values obtained from Lip module.</param>
+            /// <returns>Indicates whether the values received are new.</returns>
+            [Obsolete("Create FacialManager object and call member function GetWeightings instead")]
+            public static bool GetLipWeightings(out Dictionary<XrLipShapeHTC, float> shapes)
+            {
+                bool update = UpdateData();
+                shapes = Weightings;
+                return update;
+            }
+
+        }
+        
+    }
+}
+