Negative volume of triangle in udim 2

[bboeyken]

When computing the volume of a 2D simplex (with udim=2) using a BEAST assembly method, the resulting value is often negative. This volume is subsequently used to calculate the Jacobian, which leads to a negative assembled matrix.
The relevant function is available at:

CompScienceMeshes.jl/src/charts.jl

Lines 216 to 226 in bc999fb

	function _normals(tangents::SVector{2,SVector{2,T}}, ::Type{Val{0}}) where {T}
	t = tangents[1]
	s = tangents[2]
	v = (t[1]*s[2] - t[2]*s[1])/2
	# n[3] = tangents[1] × tangents[2]
	# l = norm(n)
	P = SVector{2,T}
	SVector{0,P}(), v
	end

Shouldn’t there be an absolute value applied to the volume calculation at line 220?