using DataFrames, CSV, PlotlyJS, BenchmarkTools
include("quiver.jl")
function get_quiver_plot(df)
    X = vcat(df[!, :x], df[!, :x])
    Y = vcat(df[!, :y], df[!, :y])

    U = vcat(df[!, :u], map(x->-1*x, df[!, :u]))
    V = vcat(df[!, :v], map(x->-1*x, df[!, :v]));
    q=Quiver(x=X, y=Y, u=U, v=V, vector_scale=0.01, arrow_scale=0.001,  angle=pi/18)
    fig = quiverPlot(q;) 
    update!(fig, line_width=0.75,  [1],  
            layout=Layout(width=700, height=500)) 
    return(fig)
end    
df = CSV.read("quiver.csv", DataFrame);
fig= get_quiver_plot(df);


@btime get_quiver_plot(df);