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This function will return a value that is proportional to the irregularity of a triangonal face or subface. The ratio of the lengths of the shortest and the longest edges.
trishape(gridObj)# S4 method for trigrid
trishape(gridObj)
# S4 method for hexagrid
trishape(gridObj)
A named numeric vector, one value for every face of the grid.
The value is exactly 1 for an equilateral triangle, and becomes 0 as one of the edges approach 0.
# NOT RUN {
g <- trigrid(3)
shape <- trishape(g)
# }
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