medibb/mocap

R interface to parsing and plotting Motion Capture ASF/AMC files

This package holds functions to easily parse motion capture ("mocap") files. Currently only ASF/AMC files are supported, and only those found in the Carnegie Mellon University Graphics Lab Motion Capture Database have been tested.

Install:

devtools::install_github("gsimchoni/mocap")

Load:

library(mocap)

Parse a ASF file:

asfFilePath <- system.file("extdata", "lambada.asf", package = "mocap")
asf <- readASF(asfFilePath)

Parse a AMC file:

amcFilePath <- system.file("extdata", "lambada.amc", package = "mocap")
amc <- readAMC(amcFilePath, asf)

Get Motion Data:

xyz <- getMotionData(asf, amc)

Make a GIF out of it (if you have the scatterplot3d and animation packages installed):

makeMotionMovie(asf, amc, xyz, skipNFrames = 4)

Animate a few skeletons from a single one:

asfFilePath <- system.file("extdata", "zombie.asf", package = "mocap")
asf <- readASF(asfFilePath)
amcFilePath <- system.file("extdata", "zombie.amc", package = "mocap")
amc <- readAMC(amcFilePath, asf)
xyz <- getMotionData(asf, amc)
makeMotionMovie(asf, amc, xyz, skipNFrames = 3, nSkeletons = 10, sdExtraSkeleton = 100)

Animate two different skeletons simultaneously:

asfFile <- system.file("extdata", "charleston.asf", package = "mocap")
asf <- readASF(asfFile)
amcFile1 <- system.file("extdata", "charleston1.amc", package = "mocap")
amc1 <- readAMC(amcFile1, asf)
amcFile2 <- system.file("extdata", "charleston2.amc", package = "mocap")
amc2 <- readAMC(amcFile2, asf)
xyz1 <- getMotionData(asf, amc1)
xyz2 <- getMotionData(asf, amc2)
makeMotionMovie(asf, amc1, xyz1, skipNFrames = 2,
                twoSkeletons = TRUE, amc2 = amc2, xyz2 = xyz2, viewAngle = 20)

More information and examples here.

Credit goes to:

• Vanush Vaswani for this excellent Python code

• Jernej Barbic for this Matlab code for converting the AMC file into a matrix