s = vrml_arrow (sz, col) - Arrow pointing in "y" direction
INPUT :
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Arguments are optional. NaN's are replaced by default values.
sz = [len, alen, dc, dr] has size 1, 2, 3 or 4, where
len : total length <1>
alen : If positive: length of cone/total length <1/4>
If negative: -(length of cone)
dc : If positive: diameter of cone base/total len <1/16>
If negative: -(diameter of cone)
dr : If positive: diameter of rod/total length
If negative: -(diameter of rod)
col : 3 or 3x2 : Color of body and cone <[0.3 0.4 0.9]>
OUTPUT :
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s : string : vrml representation of an arrow (a rod and a cone)
Package: vrml
