-- **rmin1, rmax1** - minimal and maximal radiuses of a base of the cone.
-- **rmin2, rmax2** - minimal and maximal rediuses of a top of the cone.
-- **z** is a heighth of the cone.
-- **startphi** is a starting angle of the cone segment.
-- **deltaphi** is an angle to end of the cone segment.
+- **rmin1, rmax1** - minimal and maximal radii of the cone base.
+- **rmin2, rmax2** - minimal and maximal radii of the cone top.
+- **z** - height of the cone.
+- **startphi** - angle from the axis to the start of the cone segment.
+- **deltaphi** - arc angle of the cone segment.