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Point cloud analysis

Example trajectories

First some example trajectories are created in form of Correlated Random Walks (CRWs):

crws <- lapply(X=seq(1:100), FUN = function(X) {
  sim.crw.3d(nStep = 100, rTurn = 0.99, rLift = 0.99, meanStep = 0.1)
  })
plot2d(crws)

Utilization distribution

Count points per voxel and plot counts as raster stack:

points <- do.call("rbind", crws)
extent <- extent(c(-10, 10, -10, 10))
ud <- voxelCount(points, extent, xyRes=5, zMin=-10, zMax=10)
plotRaster(ud)

Chi square maps

By calculating Chi maps, the over- and underrepresentation of points in the voxel space can be interpreted statistically:

chi <- chiMaps(ud)
plotRaster(chi, centerColorBar=TRUE)

Export voxel data

The voxel dataCube of type rasterStack can be exported as Tiff image sequence. Image sequences are a common structure to represent voxel data and most of the specific software to visualize voxel data is able to read it (e.g. blender)

saveImageSlices(ud, filename = "utilization-distribution", dir="folder/path")
saveImageSlices(chi, filename = "chi-map-cube", dir="folder/path")

These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.
Health stats visible at Monitor.