Projection on Cylinder

To produce a Projection on Cylinder in the Main Menu select Operations - > Transformation - > Projection on Cylinder

This operation makes a projection of a Source planar wire or face on a cylinder defined by its radius. The cylinder's coordinate system is the same as the global coordinate system. The result represents a wire or a face that represents a projection of the source shape onto a cylinder.

To make a projection it is necessary to define:

• Object to be projected. It can be either a planar wire or a face;
• Radius of the cylinder;
• Starting angle from the cylinder's X axis around Z axis. This is the angle of the projection start.
• Length angle where the total length of the wire should be projected. If it is unchecked the projection is not scaled and the natural wire length is kept for the projection.
• Rotation angle the angle between the tangent vector to the first curve at the first point of the object projection in 2D space and U-direction of the cylinder in 2D space.
• Advanced options.

The following figure explains the meaning of each input angle:

Input angles of projection on the cylinder

Example:

The curve (in red) and its projection on the cylinder

TUI Command: geompy.MakeProjectionOnCylinder(theObject, theRadius, theStartAngle=0.0, theAngleLength=-1.0, theAngleRotation=0.0), where theObject is a shape to be projected, theRadius is a cylinder radius, theStartAngle is the starting angle of projection in radians, theAngleLength the projection length angle in radians, theAngleRotation projection rotation angle in radians. The Result will be a GEOM_Object.

Our TUI Scripts provide you with useful examples of the use of Transformation Operations.