////////////////////////////////
module fleche(resolution=60){
    cylinder(h = 0.5, r1 = 0.1, r2 = 0.1, center = false,$fn=resolution);
    translate([0,0,0.5])
        cylinder(h = 0.5, r1 = 0.2, r2 = 0, center = false,$fn=resolution);
}
////////////////////////////////
module repere(){
    color("red")
        rotate(90,[0,1,0])  //équivalent à rotate([0,90,0])
            fleche(10);
    color("green")
        rotate(-90,[1,0,0])
            fleche(10);
    color("blue")
        rotate(0,[0,1,0])
            fleche(10);
}
////////////////////////////////