protected override int Recognise(FeatureData data)
{
switch (_motionState)
{
case MotionState.Initial:
float footHeight = data.CalculateDifferY(JointType.AnkleLeft, JointType.AnkleRight);
// 判断是否抬高脚data.CompareThresholdY(JointType.AnkleLeft, JointType.AnkleRight, 15) == 1
if (footHeight > MinFootHeight &&
footHeight < MaxFootHeight) // 用Y判断脚抬高度,脚离地阈值为15
{
_motionState = MotionState.Invalid; // 标记为无效，等待放下脚恢复初始状态
if (data.CompareThresholdZ(JointType.AnkleLeft, JointType.HipLeft, 30) == 0 && // 用Z排除非前踢腿
data.CompareThresholdX(JointType.AnkleLeft, JointType.HipLeft, 15) == 0) // 用X排除非左右侧踢腿
{
return(1);
}
}
break;
default:
// 放下脚恢复初始状态
if (data.CompareThresholdY(JointType.AnkleLeft, JointType.AnkleRight, 5) == 0)
{
_motionState = MotionState.Initial;
}
break;
}
return(0);
}
protected override int Recognise(FeatureData data)
{
// 计算两脚高度差
float ankleDifferY = Math.Abs(data.CalculateDifferY(JointType.AnkleRight, JointType.AnkleLeft));
// 计算两脚的绝对坐标
float absoluteAnkleRightY = data.RelativeJoints[(int)JointType.AnkleRight].y + data.AbsoluteOrigin.y;
float absoluteAnkleLeftY = data.RelativeJoints[(int)JointType.AnkleLeft].y + data.AbsoluteOrigin.y;
//bool tracked = data.IsJointTracked(KinectWrapper.NuiSkeletonPositionIndex.AnkleRight); Waterstrong
// 两脚绝对坐标Y的较小值
float minAbsoluteAnkleY = Math.Min(absoluteAnkleLeftY, absoluteAnkleRightY);
// 当一只脚超过另一脚时
if (ankleDifferY > MaxHeightThreshold)
{
// 当想站上某个高处时即开始准备重设地面，获取较大值
_groundLevel = Math.Max(absoluteAnkleLeftY, absoluteAnkleRightY);
}
switch (_motionState)
{
case MotionState.Initial:
// 当两脚高度差不超过阈值时
if (ankleDifferY < MinHeightThreshold)
{
// 获取左右脚以及地面中最小的值来重设地面
_groundLevel = Math.Min(minAbsoluteAnkleY, _groundLevel);
// 直接判断
if (minAbsoluteAnkleY - _groundLevel > JumpHeightThreshold /*&& tracked Waterstrong*/)
{
// 重置地面，用于判断是否开始落下，否则跳太高会二次识别
_groundLevel = minAbsoluteAnkleY;
_counter = 0;
_motionState = MotionState.Invalid;
return(1);
}
}
break;
default:
if (minAbsoluteAnkleY < _groundLevel) // 当开始落下时才生效
{
_motionState = MotionState.Initial;
}
else if (++_counter >= CounterThreshold) // 可能跳到了一个较高的地方，需要一段时间来重置
{
_counter = 0;
_groundLevel = minAbsoluteAnkleY;
_motionState = MotionState.Initial;
}
break;
}
return(0);
}
private const float LegRadianThreshold = 0.64f; //弧度阈值；40度约为0.64左右,45度约为0.707
protected override int Recognise(FeatureData data)
{
switch (_motionState)
{
case MotionState.Initial:
// 判断是否抬高脚
if (data.CompareThresholdY(JointType.AnkleLeft, JointType.AnkleRight, 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.AnkleLeft, JointType.HipLeft, 30) == 0 &&
data.CompareThresholdX(JointType.AnkleLeft, JointType.HipLeft, 15) == 0)
{
_motionState = MotionState.Invalid;
return(0);
}
// 大概的腿长，从踝开始计算
float legLength = data.CalculateDifferY(JointType.HipRight, JointType.AnkleRight);
if (legLength <= 0) // 腿长不适合理论数据
{
return(0);
}
// 在x和z轴上的映射投影距离差值
float ankleDifferX = Math.Abs(data.CalculateDifferX(JointType.AnkleLeft, JointType.AnkleRight));
float ankleDifferZ = Math.Abs(data.CalculateDifferZ(JointType.AnkleLeft, JointType.AnkleRight));
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(1);
}
}
else
{
_motionState = MotionState.Invalid;
}
break;
default:
// 放下脚恢复初始状态
if (data.CompareThresholdY(JointType.AnkleLeft, JointType.AnkleRight, 5) == 0)
{
_motionState = MotionState.Initial;
}
break;
}
return(0);
}
