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Combine mass properties

Source: R/massprops.R
combine_mass_props.Rd

combine_mass_props() calculates the mass properties of an aggregate from a list of constituent mass properties.

Usage

combine_mass_props(mpl)

Arguments

mpl

A list of mass properties lists, each of which contains the following named elements:

  • mass Numeric mass.

  • center_mass Numeric 3-vector center of mass.

  • point Logical indicating point mass. The inertia of point masses is excluded from calculations.

  • inertia Numeric 3x3 matrix inertia tensor.

Value

Combined mass properties list with the same named elements.

Details

See vignette("massProps", package = "massProps") for details on the algorithms employed.

Examples

leaves <- names(igraph::neighbors(test_tree, "A.3", mode = "in"))
mpl <- Map(f = function(id) get_mass_props(test_table, id), leaves)
combine_mass_props(mpl)
#> $mass
#> [1] 8
#> 
#> $center_mass
#>  x  y  z 
#> -1  0  0 
#> 
#> $inertia
#>      x    y    z
#> x 32.0 -0.4 -0.4
#> y -0.4 24.0  0.4
#> z -0.4  0.4 24.0
#> 
#> $point
#> [1] FALSE
#>