private const float LegRadianThreshold = 0.57f; //30, 0.64f; //弧度阈值；40度约为0.64左右,45度约为0.707
#endregion Fields
#region Methods
protected override bool Recognise(FeatureData data)
{
switch (_motionState)
{
case MotionState.Initial:
// 判断是否抬高脚
if (data.CompareThresholdY(JointType.AnkleRight, JointType.AnkleLeft, 10) == 1) // 用Y判断脚抬高度,脚离地阈值为10
{
_motionState = MotionState.Valid;
}
break;
case MotionState.Valid:
// 区别抬脚动作
if (data.CompareThresholdZ(JointType.AnkleRight, JointType.HipRight, 30) == 0 &&
data.CompareThresholdX(JointType.AnkleRight, JointType.HipRight, 15) == 0)
{
_motionState = MotionState.Invalid;
return false;
}
// 大概的腿长，从踝开始计算
float legLength = data.CalculateDifferY(JointType.HipLeft, JointType.AnkleLeft);
if (legLength <= 0) // 腿长不适合理论数据
{
return false;
}
// 在x和z轴上的映射投影距离差值
float ankleDifferX = Math.Abs(data.CalculateDifferX(JointType.AnkleRight, JointType.AnkleLeft));
float ankleDifferZ = Math.Abs(data.CalculateDifferZ(JointType.AnkleRight, JointType.AnkleLeft));
if (ankleDifferX >= ankleDifferZ) // 排除向前或后踢的情况
{
// 计算腿抬起后裸相差的水平距离
float ankleHorizontalDistance = (float)Math.Sqrt(ankleDifferX * ankleDifferX + ankleDifferZ * ankleDifferZ);
// 计算腿抬起的弧度
float legRadian = ankleHorizontalDistance / legLength;
// 当抬起角度超过弧度阈值后生效
if (legRadian > LegRadianThreshold)
{
_motionState = MotionState.Invalid;
return true;
}
}
else
{
_motionState = MotionState.Invalid;
}
break;
default:
// 放下脚恢复初始状态
if (data.CompareThresholdY(JointType.AnkleRight, JointType.AnkleLeft, 5) == 0)
{
_motionState = MotionState.Initial;
}
break;
}
return false;
}
protected override bool Recognise(FeatureData data)
{
// 如果另一只手不在初始位置，则不识别
if (data.CompareThresholdY(JointType.HandLeft, JointType.Spine, 0) == 1)
{
_motionState = MotionState.Invalid;
return false;
}
switch(_motionState)
{
case MotionState.Initial:
// 手超过一定位置
if (data.CompareThresholdY(JointType.HandRight, JointType.ShoulderLeft, 0) == 1)
{
// 用肩中心到脊椎的距离大致估计手的比例，确保身高不影响,超出身体指定的范围标记为无效，此时刚好为到Y轴的距离
// 并且手在身体附近
if (data.CalculateDifferX(JointType.HandRight, JointType.ShoulderCenter) < 5 ||
(data.HandRight2BodyHorizontalDistance < data.ShoulderCenter2SpineHeight &&
data.CalculateSpaceDistance(JointType.HandRight, JointType.ShoulderLeft) < data.ShoulderCenter2SpineHeight))
{
_motionState = MotionState.Valid;
}
else
{
_motionState = MotionState.Invalid;
}
}
break;
case MotionState.Valid: // 达到第一个有效点后
// 判断是否超过了头
if (data.CompareThresholdY(JointType.HandRight, JointType.Head, 0) == 1)
{
_motionState = MotionState.Valid2;
}
break;
case MotionState.Valid2: // 第二个有效点
if (data.CompareThresholdY(JointType.HandRight, JointType.ShoulderRight, 15) == 0) // 经过了肩的位置，表明正放下
{
_motionState = MotionState.Invalid; // 无论结果如何都无效
// 手是否伸直的，上身的高度，用于近视计算手的比例
if (data.HandRight2BodyHorizontalDistance > data.Head2HipCenterHeight*0.8)
{
return true;
}
}
break;
default:
break;
}
// 当手放下时
if (_motionState != MotionState.Initial &&
data.CompareThresholdY(JointType.HandRight, JointType.Spine, 0) == -1)
{
_motionState = MotionState.Initial;
}
return false;
}
protected override bool Recognise(FeatureData data)
{
// 当另一只手也举起则无效
if (data.CompareThresholdY(JointType.HandLeft, JointType.ShoulderLeft, 0) == 1)
{
_motionState = MotionState.Invalid;
return false;
}
switch (_motionState)
{
case MotionState.Initial:
// 当超过肩开始生效
if (data.CompareThresholdY(JointType.HandRight, JointType.ShoulderLeft, 0) == 1)
{
// 太近了则无效，区别于划圆
if (data.CalculateDifferX(JointType.HandRight, JointType.ShoulderCenter) < 5 ||
(data.HandRight2BodyHorizontalDistance < data.ShoulderCenter2SpineHeight &&
data.CalculateSpaceDistance(JointType.HandRight, JointType.ShoulderLeft) < data.ShoulderCenter2SpineHeight))
{
_motionState = MotionState.Invalid;
}
else
{
_motionState = MotionState.Valid;
}
}
break;
case MotionState.Valid:
// 手举起后肘关节与头的相对位置
//if (data.CompareThresholdY(JointType.ElbowRight, JointType.Head, 13) == 0 &&
// data.CompareThresholdX(JointType.ElbowRight, JointType.Head, 33) == 0)
if (data.CompareThresholdY(JointType.HandRight, JointType.Head, 8) == 1)
{
_motionState = MotionState.Invalid;
return true;
}
//else if (data.HandRight2BodyHorizontalDistance > 1.1 * data.Head2HipCenterHeight) // 在有效状态下，超出身体指定的范围标记为无效，可能是从侧面举起手的
//{
// // 水平距离的阈值,大致估计手的比例，确保身高不影响(可用1.8 * data.ShoulderCenter2SpineHeight)
// _motionState = MotionState.Invalid;
//}
break;
default:
break;
}
// 手放下来后恢复初始状态
if (_motionState != MotionState.Initial &&
data.CompareThresholdY(JointType.HandRight, JointType.Spine, 0) == -1)
{
_motionState = MotionState.Initial;
}
return false;
}
