add package files

com.htc.upm.vive.openxr/OpenXRFacialTracking/Samples~/Scripts/Eye/Eye.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 static class Eye
+            {
+                public const int WeightingCount = (int)XrEyeShapeHTC.XR_EYE_EXPRESSION_MAX_ENUM_HTC;
+                private static XrFacialExpressionsHTC EyeExpression_;
+                private static int LastUpdateFrame = -1;
+                private static Error LastUpdateResult = Error.FAILED;
+                private static Dictionary<XrEyeShapeHTC, float> Weightings;
+                private static float[] blendshapes = new float[60];
+                static Eye()
+                {
+                    Weightings = new Dictionary<XrEyeShapeHTC, float>();
+                    for (int i = 0; i < WeightingCount; ++i) Weightings.Add((XrEyeShapeHTC)i, 0.0f);
+                }
+                private static bool UpdateData()
+                {
+                    if (Time.frameCount == LastUpdateFrame) return LastUpdateResult == Error.WORK;
+                    else LastUpdateFrame = Time.frameCount;
+                    EyeExpression_.expressionCount = 60;
+                    EyeExpression_.type = XrStructureType.XR_TYPE_FACIAL_EXPRESSIONS_HTC;
+                    EyeExpression_.blendShapeWeightings = Marshal.AllocCoTaskMem(sizeof(float) * EyeExpression_.expressionCount);
+                    var feature = OpenXRSettings.Instance.GetFeature<VIVE_FacialTracking_OpenXR_API>();
+                    int res = feature.xrGetFacialExpressionsHTC(OpenXRSettings.Instance.GetFeature<VIVE_FacialTracking_OpenXR_API>().m_expressionHandle, ref EyeExpression_);
+                    if (res == (int)XrResult.XR_SUCCESS)
+                    {
+                        Marshal.Copy(EyeExpression_.blendShapeWeightings, blendshapes, 0, EyeExpression_.expressionCount);
+                        LastUpdateResult = Error.WORK;
+
+                    }
+                    else
+                    {
+                        LastUpdateResult = Error.FAILED;
+                    }
+                    return LastUpdateResult == Error.WORK;
+                }
+                public static bool GetEyeWeightings(out Dictionary<XrEyeShapeHTC, float> shapes, XrFacialExpressionsHTC expression)
+                {
+                    for (int i = 0; i < WeightingCount; ++i)
+                    {
+                        Weightings[(XrEyeShapeHTC)(i)] = blendshapes[i];
+                    }
+                    shapes = Weightings;
+                    return true;
+                }
+
+
+                /// <summary>
+                /// Gets weighting values from Eye module.
+                /// </summary>
+                /// <param name="shapes">Weighting values obtained from Eye module.</param>
+                /// <returns>Indicates whether the values received are new.</returns>\
+                [Obsolete("Create FacialManager object and call member function GetWeightings instead")]
+                public static bool GetEyeWeightings(out Dictionary<XrEyeShapeHTC, float> shapes)
+                {
+                    UpdateData();
+                    return GetEyeWeightings(out shapes, EyeExpression_);
+                }
+
+            }
+        
+    }
+}