/*
* Returns the mean velocity vector for the gesture in world space.
*/
private Point_3D mean_velocity_3D(ref List <Point_3D> gesture3d)
{
Point_3D v = new Point_3D();
v.time = 0;
v.x = 0;
v.y = 0;
v.z = 0;
for (int i = 0; i < gesture3d.Count - 1; i++)
{
float dx = gesture3d[i + 1].x - gesture3d[i].x;
float dy = gesture3d[i + 1].y - gesture3d[i].y;
float dz = gesture3d[i + 1].z - gesture3d[i].z;
float dt = gesture3d[i + 1].time - gesture3d[i].time;
v.x += dx / dt;
v.y += dy / dt;
v.z += dz / dt;
}
v.x /= (gesture3d.Count - 1);
v.y /= (gesture3d.Count - 1);
v.z /= (gesture3d.Count - 1);
return(v);
}
public void VaryingOrderingOfJson()
{
Point_3D point = Serializer.Deserialize <Point_3D>(@"{""X"":1,""Y"":2,""Z"":3}");
Assert.Equal(1, point.X);
Assert.Equal(2, point.Y);
Assert.Equal(3, point.Z);
point = Serializer.Deserialize <Point_3D>(@"{""X"":1,""Z"":3,""Y"":2}");
Assert.Equal(1, point.X);
Assert.Equal(2, point.Y);
Assert.Equal(3, point.Z);
point = Serializer.Deserialize <Point_3D>(@"{""Y"":2,""Z"":3,""X"":1}");
Assert.Equal(1, point.X);
Assert.Equal(2, point.Y);
Assert.Equal(3, point.Z);
point = Serializer.Deserialize <Point_3D>(@"{""Y"":2,""X"":1,""Z"":3}");
Assert.Equal(1, point.X);
Assert.Equal(2, point.Y);
Assert.Equal(3, point.Z);
point = Serializer.Deserialize <Point_3D>(@"{""Z"":3,""Y"":2,""X"":1}");
Assert.Equal(1, point.X);
Assert.Equal(2, point.Y);
Assert.Equal(3, point.Z);
point = Serializer.Deserialize <Point_3D>(@"{""Z"":3,""X"":1,""Y"":2}");
Assert.Equal(1, point.X);
Assert.Equal(2, point.Y);
Assert.Equal(3, point.Z);
}
public async Task NoConstructorHandlingWhenObjectHasConverter()
{
// Baseline without converter
string serialized = JsonSerializer.Serialize(new Point_3D(10, 6));
Point_3D point = await Serializer.DeserializeWrapper <Point_3D>(serialized);
Assert.Equal(10, point.X);
Assert.Equal(6, point.Y);
Assert.Equal(50, point.Z);
serialized = JsonSerializer.Serialize(new[] { new Point_3D(10, 6) });
point = (await Serializer.DeserializeWrapper <Point_3D[]>(serialized))[0];
Assert.Equal(10, point.X);
Assert.Equal(6, point.Y);
Assert.Equal(50, point.Z);
serialized = JsonSerializer.Serialize(new WrapperForPoint_3D {
Point_3D = new Point_3D(10, 6)
});
point = (await Serializer.DeserializeWrapper <WrapperForPoint_3D>(serialized)).Point_3D;
Assert.Equal(10, point.X);
Assert.Equal(6, point.Y);
Assert.Equal(50, point.Z);
// Converters for objects with parameterized ctors are honored
var options = new JsonSerializerOptions();
options.Converters.Add(new ConverterForPoint3D());
serialized = JsonSerializer.Serialize(new Point_3D(10, 6));
point = await Serializer.DeserializeWrapper <Point_3D>(serialized, options);
Assert.Equal(4, point.X);
Assert.Equal(4, point.Y);
Assert.Equal(4, point.Z);
serialized = JsonSerializer.Serialize(new[] { new Point_3D(10, 6) });
point = (await Serializer.DeserializeWrapper <Point_3D[]>(serialized, options))[0];
Assert.Equal(4, point.X);
Assert.Equal(4, point.Y);
Assert.Equal(4, point.Z);
serialized = JsonSerializer.Serialize(new WrapperForPoint_3D {
Point_3D = new Point_3D(10, 6)
});
point = (await Serializer.DeserializeWrapper <WrapperForPoint_3D>(serialized, options)).Point_3D;
Assert.Equal(4, point.X);
Assert.Equal(4, point.Y);
Assert.Equal(4, point.Z);
}
public void AsProperty_Of_ObjectWithParameterizedCtor()
{
ClassWrapperForPoint_3D obj = Serializer.Deserialize <ClassWrapperForPoint_3D>(@"{""Point3D"":{""Y"":2,""Z"":3,""X"":1}}");
Point_3D point = obj.Point3D;
Assert.Equal(1, point.X);
Assert.Equal(2, point.Y);
Assert.Equal(3, point.Z);
}
public async Task AsProperty_Of_ObjectWithParameterlessCtor()
{
WrapperForPoint_3D obj = await Serializer.DeserializeWrapper <WrapperForPoint_3D>(@"{""Point_3D"":{""Y"":2,""Z"":3,""X"":1}}");
Point_3D point = obj.Point_3D;
Assert.Equal(1, point.X);
Assert.Equal(2, point.Y);
Assert.Equal(3, point.Z);
}
public async Task VaryingOrderingOfJson()
{
Point_3D point = await Serializer.DeserializeWrapper <Point_3D>(@"{""X"":1,""Y"":2,""Z"":3}");
Assert.Equal(1, point.X);
Assert.Equal(2, point.Y);
Assert.Equal(3, point.Z);
point = await Serializer.DeserializeWrapper <Point_3D>(@"{""X"":1,""Z"":3,""Y"":2}");
Assert.Equal(1, point.X);
Assert.Equal(2, point.Y);
Assert.Equal(3, point.Z);
point = await Serializer.DeserializeWrapper <Point_3D>(@"{""Y"":2,""Z"":3,""X"":1}");
Assert.Equal(1, point.X);
Assert.Equal(2, point.Y);
Assert.Equal(3, point.Z);
point = await Serializer.DeserializeWrapper <Point_3D>(@"{""Y"":2,""X"":1,""Z"":3}");
Assert.Equal(1, point.X);
Assert.Equal(2, point.Y);
Assert.Equal(3, point.Z);
point = await Serializer.DeserializeWrapper <Point_3D>(@"{""Z"":3,""Y"":2,""X"":1}");
Assert.Equal(1, point.X);
Assert.Equal(2, point.Y);
Assert.Equal(3, point.Z);
point = await Serializer.DeserializeWrapper <Point_3D>(@"{""Z"":3,""X"":1,""Y"":2}");
Assert.Equal(1, point.X);
Assert.Equal(2, point.Y);
Assert.Equal(3, point.Z);
}
public async Task UseDefaultValues_When_NoJsonMatch()
{
// Using CLR value when `ParameterInfo.DefaultValue` is not set.
Point_2D point = await Serializer.DeserializeWrapper <Point_2D>(@"{""x"":1,""y"":2}");
Assert.Equal(0, point.X);
Assert.Equal(0, point.Y);
point = await Serializer.DeserializeWrapper <Point_2D>(@"{""y"":2,""x"":1}");
Assert.Equal(0, point.X);
Assert.Equal(0, point.Y);
point = await Serializer.DeserializeWrapper <Point_2D>(@"{""x"":1,""Y"":2}");
Assert.Equal(0, point.X);
Assert.Equal(2, point.Y);
point = await Serializer.DeserializeWrapper <Point_2D>(@"{""y"":2,""X"":1}");
Assert.Equal(1, point.X);
Assert.Equal(0, point.Y);
point = await Serializer.DeserializeWrapper <Point_2D>(@"{""X"":1}");
Assert.Equal(1, point.X);
Assert.Equal(0, point.Y);
point = await Serializer.DeserializeWrapper <Point_2D>(@"{""Y"":2}");
Assert.Equal(0, point.X);
Assert.Equal(2, point.Y);
point = await Serializer.DeserializeWrapper <Point_2D>(@"{""X"":1}");
Assert.Equal(1, point.X);
Assert.Equal(0, point.Y);
point = await Serializer.DeserializeWrapper <Point_2D>(@"{""Y"":2}");
Assert.Equal(0, point.X);
Assert.Equal(2, point.Y);
point = await Serializer.DeserializeWrapper <Point_2D>(@"{}");
Assert.Equal(0, point.X);
Assert.Equal(0, point.Y);
point = await Serializer.DeserializeWrapper <Point_2D>(@"{""a"":1,""b"":2}");
Assert.Equal(0, point.X);
Assert.Equal(0, point.Y);
// Using `ParameterInfo.DefaultValue` when set; using CLR value as fallback.
Point_3D point3d = await Serializer.DeserializeWrapper <Point_3D>(@"{""X"":1}");
Assert.Equal(1, point3d.X);
Assert.Equal(0, point3d.Y);
Assert.Equal(50, point3d.Z);
point3d = await Serializer.DeserializeWrapper <Point_3D>(@"{""y"":2}");
Assert.Equal(0, point3d.X);
Assert.Equal(0, point3d.Y);
Assert.Equal(50, point3d.Z);
point3d = await Serializer.DeserializeWrapper <Point_3D>(@"{""Z"":3}");
Assert.Equal(0, point3d.X);
Assert.Equal(0, point3d.Y);
Assert.Equal(3, point3d.Z);
point3d = await Serializer.DeserializeWrapper <Point_3D>(@"{""X"":1}");
Assert.Equal(1, point3d.X);
Assert.Equal(0, point3d.Y);
Assert.Equal(50, point3d.Z);
point3d = await Serializer.DeserializeWrapper <Point_3D>(@"{""Y"":2}");
Assert.Equal(0, point3d.X);
Assert.Equal(2, point3d.Y);
Assert.Equal(50, point3d.Z);
point3d = await Serializer.DeserializeWrapper <Point_3D>(@"{""Z"":3}");
Assert.Equal(0, point3d.X);
Assert.Equal(0, point3d.Y);
Assert.Equal(3, point3d.Z);
point3d = await Serializer.DeserializeWrapper <Point_3D>(@"{""x"":1,""Y"":2}");
Assert.Equal(0, point3d.X);
Assert.Equal(2, point3d.Y);
Assert.Equal(50, point3d.Z);
point3d = await Serializer.DeserializeWrapper <Point_3D>(@"{""Z"":3,""y"":2}");
Assert.Equal(0, point3d.X);
Assert.Equal(0, point3d.Y);
Assert.Equal(3, point3d.Z);
point3d = await Serializer.DeserializeWrapper <Point_3D>(@"{""x"":1,""Z"":3}");
Assert.Equal(0, point3d.X);
Assert.Equal(0, point3d.Y);
Assert.Equal(3, point3d.Z);
point3d = await Serializer.DeserializeWrapper <Point_3D>(@"{}");
Assert.Equal(0, point3d.X);
Assert.Equal(0, point3d.Y);
Assert.Equal(50, point3d.Z);
point3d = await Serializer.DeserializeWrapper <Point_3D>(@"{""a"":1,""b"":2}");
Assert.Equal(0, point3d.X);
Assert.Equal(0, point3d.Y);
Assert.Equal(50, point3d.Z);
}
/*
* returns the norm of a 3D vector.
*/
private float vec3_norm(Point_3D vec)
{
return((float)Math.Sqrt(vec.x * vec.x + vec.y * vec.y + vec.z * vec.z));
}
public Gesture_Meta recognize_gesture(List <Point_2D> gesture, List <Point_3D> gesture3D)
{
if (gesture.Count <= 2 * LP_KERNEL_SIZE)
{
var gm = new Gesture_Meta();
gm.type = Gesture.unknown;
return(gm);
}
Bounds bounds = calculate_bounds(ref gesture, 0, gesture.Count);
List <float> angles = new List <float>();
if (LP_ENABLE)
{
gesture = gaussian_average_lowpass(gesture, LP_KERNEL_SIZE, LP_SIGMA);
}
float angle_sum = calculate_angles(ref gesture, ref angles, bounds);
Point_2D avg_vel_vec2 = mean_velocity_2D(ref gesture);
Point_3D avg_vel_vec3 = mean_velocity_3D(ref gesture3D);
float gesture_width = bounds.max_x - bounds.min_x;
float gesture_height = bounds.max_y - bounds.min_y;
float gesture_depth = bounds.max_z - bounds.min_z;
Point_2D start = gesture[0];
Point_2D end = gesture[gesture.Count - 1];
Gesture_Meta ret = new Gesture_Meta();
ret.type = Gesture.unknown;
ret.avg_vel_vector = avg_vel_vec3;
ret.angle_sum = angle_sum;
ret.bounds = bounds;
List <Point_2D> sparse_gesture = sparsify(ref gesture);
float[] global_angles = vector_list_angles(ref sparse_gesture);
// ************************ Classify gesture **************************
float vel_vec_norm = vec2_norm(avg_vel_vec2, false);
float x_pos_dev = angle(avg_vel_vec2, new Point_2D(0, 1, 0, 0), false);
float y_pos_dev = angle(avg_vel_vec2, new Point_2D(0, 0, 1, 0), false);
float z_pos_dev = angle(avg_vel_vec2, new Point_2D(0, 0, 0, 1), false);
float x_neg_dev = angle(avg_vel_vec2, new Point_2D(0, -1, 0, 0), false);
float y_neg_dev = angle(avg_vel_vec2, new Point_2D(0, 0, -1, 0), false);
float z_neg_dev = angle(avg_vel_vec2, new Point_2D(0, 0, 0, -1), false);
bool x_pos = x_pos_dev < x_neg_dev;
bool y_pos = y_pos_dev < y_neg_dev;
bool z_pos = z_pos_dev < z_neg_dev;
bool z_gesture = gesture_depth > gesture_height &&
gesture_depth > gesture_width;
// likely a gesture with depth
if (vel_vec_norm > VEL_VEC_NORM_THRESH && z_gesture || gesture_depth > Z_DEPTH_THRESH)
{
if (z_pos_dev < ANGLE_DEVIATION_THRESH && Math.Abs(avg_vel_vec2.z) > 0.2)
{
ret.type = Gesture.push;
}
else if (z_neg_dev < ANGLE_DEVIATION_THRESH && Math.Abs(avg_vel_vec2.z) > 0.2)
{
ret.type = Gesture.pull;
}
}
// likely a gesture of one or more line segments
if (ret.type == Gesture.unknown)
{
List <LinearSegment> segments = find_linear_segments(global_angles, sparse_gesture, bounds);
Console.WriteLine(segments.Count);
Gesture[] candidate_gestures;
gesture_len_map.TryGetValue(segments.Count, out candidate_gestures);
if (candidate_gestures != null)
{
foreach (Gesture g in candidate_gestures)
{
if (matches_linear_segments(segments, g, sparse_gesture,
alt_start_allowed_map[g]))
{
ret.type = g;
break;
}
}
}
}
// likely a circle
if (ret.type == Gesture.unknown)
{
// likely a circle
float min_angle = (float)((2 - ANGLE_SUM_THRESH) * Math.PI);
float max_angle = (float)((2 + ANGLE_SUM_THRESH) * Math.PI);
if (angle_sum > min_angle && angle_sum < max_angle)
{
ret.type = Gesture.circle_ccw;
}
else if (angle_sum < -min_angle && angle_sum > -max_angle)
{
ret.type = Gesture.circle_cw;
}
else if (angle_sum > 6 * Math.PI)
{
ret.type = Gesture.spiral_ccw;
}
}
return(ret);
}
