Leap Motion开发环境配置

Experiment Record

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Leap Motion 使用

1.环境配置

• Mac
  1）官方网站下载SDK for mac
  2）python版本： 2.7（installed by homebrew）
  3）更改动态链接路径
  4）在lib/包下找到LeapPython.so ，在终端执行下面的命令 查看默认链接路径

  otool -L LeapPython.so
  

  5）替换动态链接命令

  install_name_tool -change old new LeapPython.so
  

我自己的路径，每个人不一样的，但是最后的文件都是 libpython2.7.dylib，因为LeapPython.so要加载这个链接库，否则会报错。
old ：/library/.../..../...
new:/usr/local/Cellar/python@2/2.7.16_1/Frameworks/Python.framework/Versions/2.7/lib/libpython2.7.dylib

测试代码（或者使用sdk中提供的sample.py也ok）

import os, sys, inspect, thread, time
src_dir = os.path.dirname(inspect.getfile(inspect.currentframe()))
arch_dir = '../lib/x64' if sys.maxsize > 2**32 else '../lib/x86'
sys.path.insert(0, os.path.abspath(os.path.join(src_dir, arch_dir)))
  import Leap
  class SampleListener(Leap.Listener):
    def on_connect(self, controller):
        print "Connected"def main():
      # Create a sample listener and controller
      listener = SampleListener()
      controller = Leap.Controller()
    # Have the sample listener receive events from the controller
    controller.add_listener(listener)
    
    # Keep this process running until Enter is pressed
    print "Press Enter to quit..."
    try:
        sys.stdin.readline()
    except KeyboardInterrupt:
        pass
    finally:
        # Remove the sample listener when done
          controller.remove_listener(listener)
  if __name__ == "__main__":
      main()

• Windows
  1）从官方网站上下载SDK包
  2）python版本：2.7
  3)将在sample文件夹下的sample.py leap.py leap.pyc 移动到x64文件夹下
  4)在命令行执行sample.py
  5)成功

2.代码

取得控制器连接、添加监听

  # Create a sample listener and controller
  listener = SampleListener()
  controller = Leap.Controller()
    
  # Have the sample listener receive events from the controller
  controller.add_listener(listener)

初始化监听

def on_init(self, controller):
        print "Initialized"

连接监听

 def on_connect(self, controller):
        print "Connected"

取得当前帧，获取当前frame手部数据

 def on_frame(self, controller):
        # Get the most recent frame and report some basic information
        frame = controller.frame()

可从frame中获得的数据

frame.id
handType hand.id hand.palm_position
hand.palm_normal//法向量 hand.direction//方向向量

LeapMotion 坐标系

Pitch: direction.pitch * Leap.RAD_TO_DEG //x轴旋转
Roll: normal.roll * Leap.RAD_TO_DEG //z轴旋转
Yaw: direction.yaw * Leap.RAD_TO_DEG//y轴旋转

手臂、手腕、手肘：hand.arm arm.direction arm.elbow_position arm.wrist_position
手指：//'Thumb', 'Index', 'Middle', 'Ring', 'Pinky'
hand.finger finger_names[finger.type] finger.id finger.length finger.width
bone：//'Metacarpal', 'Proximal', 'Intermediate', 'Distal'
粗 =>细 拇指3个 其他手指4个
finger.bone bone_names[bone.type] bone.prev_joint bone.next_joint bone.direction