calciferzh/amcparser

Parse and visualize asf/amc files from CMU MoCap dataset.

AMCParser

A lightweight library to parse and visualize asf/amc files from CMU MoCap dataset using Python 3.

The main purpose of this library is to help understanding how asf/amc file works, as well as how to use them. Therefore, simplicity and readability are stressed, while robustness is ignored.

Demo

Demo using PyGame and PyOpenGL:

Demo using Matplotlib:

Usage

There's a simple example in the source code as follows:

if __name__ == '__main__':
  asf_path = './data/01/01.asf'
  amc_path = './data/01/01_01.amc'
  joints = parse_asf(asf_path)
  motions = parse_amc(amc_path)
  frame_idx = 180
  joints['root'].set_motion(motions[frame_idx])
  joints['root'].draw()

And another example in 3Dviewer.py:

  asf_path = './data/01/01.asf'
  amc_path = './data/01/01_01.amc'
  joints = parse_asf(asf_path)
  motions = parse_amc(amc_path)
  v = Viwer(joints, motions)
  v.run()

The data can be found from CMU MoCap dataset.

Parser

The asf/amc parsers are straightforward and easy to understand. The parsers are fully tested on the CMU MoCap dataset, but I don't expect it can work on other datasets without any modification. However, it won't be hard to extend it for more complicating asf/amc files.

Visualization

Matplotlib is used to draw joints and bones in 3D statically; PyGame and PyOpenGL are used to draw motion sequence.

In 3DViewer, we support:

• WASD to move around.
• QE to zoom in/out.
• ↑ ↓ ← → to rotate.
• LEFT MOUSE BUTTON to drag.
• RETURN to reset camera view.
• SPACE to start/pause.
• , and . to rewind and forward.

NOTE that my implementation of changing view is inefficient (but fluent enough) with some small bugs, but I don't have time to improve it. Pull request is welcomed.

Dependencies

• numpy
• transforms3d
• matplotlib
• pygame
• pyopengl

All the dependencies are available via pip install.

One More Thing

If this repo is used in any publications or projects, please let me know. I would be happy and encouraged =)

amcparser's Issues

report.

Thank you for opening those code.
But
Small bug is In 3DViewer.py on line 195 and 204.

for j in joints.values():
should be changed to
for j in self.joints.values():

wrong in ',' and '.' pressed

 if pressed[pygame.K_COMMA]:
      self.frame -= 1
      if self.frame >= len(self.motions):
        self.frame = 0
 if pressed[pygame.K_PERIOD]:
      self.frame += 1
      if self.frame < 0:
        self.frame = len(self.motions) - 1

should be

 if pressed[pygame.K_COMMA]:
     self.frame -= 1
     if self.frame < 0:
        self.frame = len(self.motions) - 1
 if pressed[pygame.K_PERIOD]:
      self.frame += 1
      if self.frame >= len(self.motions):
        self.frame = 0

normalizing joint length

First of all, I would like to thank you for this work. I am very impressed, this is extremely helpful and I am planning in using it for my master thesis. In order to do that on the other hand I would need to perform joint normalization, so joints would be the same length in different animations?
Can you provide any idea of how can I change that?

Plot AMC/ASF anc C3D data

Hi! I am tying to plot skeleton and maker data. I know that c3d data are in mm, which is the units of AMC data? When you plot you fix the axis limits, I can't understand the units of the coordinate system.

Thanks