Improve efficiency of FileMesh support point calculation

dot() in Float64 without broadcast yields minimum computation and memory allocation effort.

src/Shapes/boundingBoxes.jl

@@ -247,21 +247,17 @@ end
 
 # [Gino v.d. Bergen, p. 131]
 @inline function supportPoint_abs_FileMesh(shape::FileMesh, e_abs::SVector{3,T}) where {T}
-    #e_absVec = Vector{SVector{3,Float64}}(undef, 1)
-    #e_absVec[1] = e_abs
-    #(max_value, position) = findmax(broadcast(dot, shape.objPoints, e_absVec))
-    #return SVector{3,T}(shape.objPoints[position])
-    iMax::Int = 1
-    dotMax::T = typemin(T)
-    objPoints = shape.objPoints
-    for i in 2:length(shape.objPoints)
-        doti = dot(objPoints[i],e_abs)
-        if doti > dotMax
-            iMax = i
-            dotMax = doti
+    dirvec = SVector{3,Float64}(e_abs)
+    idxmax = 1
+    dotmax = typemin(Float64)
+    for idx in eachindex(shape.objPoints)
+        dotval = dot(shape.objPoints[idx], dirvec)
+        if dotval > dotmax
+            idxmax = idx
+            dotmax = dotval
         end
-    end        
-    return objPoints[iMax]
+    end
+    return SVector{3,T}(shape.objPoints[idxmax])
 end