Tangential Points

Osculation point (T)

Osculation point

In 2-D

Starting from the current cursor position, HiCAD determines the closest tangential osculation point of a line with a circle, an ellipse or an arc. The line here is defined by means of the current cursor position and the last point.

(1) Last point, (2) Cursor position, (3) Found point

In 3-D

Here, you determine the osculation point from the current 3-D point to an analytical 3-D part. The following options can occur:

Osculation Point from a 3-D Point to a Circle
The point is projected onto the circular plane and the tangent drawn from this projection circle to the circle.

Osculation Point from a 3-D Point to a Contour Edge
HiCAD first internally determines a plane onto which you want the 3-D point to be projected and the imaginary tangent placed. An additional point determines the position of the tangent. The 3-D part in question determines how the plane is defined:

Cylinder, Cone
The plane is placed through the current 3-D point and perpendicular to the axis of the cylinder or the cone. The additional point determines the position of the tangent. For a cone, the 3-D point must lie in the area of the cone.

Sphere
The plane is placed through the current 3-D point, the additional point and the midpoint of the sphere, i.e. the three points must not lie on a straight line!

Torus
The plane is placed through the current 3-D point and the axis of the torus. The additional point determines the position of the tangent.

= Current point,

= Osculation point,

= Cursor position,

= Additional point

Tangent to surface (TS)

Here, you determine the osculation point from the current 3-D point to an analytical 3-D part. In contrast to option T, the plane in which you want the new point to lie is determined by identifying two edges.

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