How do you add hidden lines in Catia?

What are hidden detail lines?

Hidden details are shown by a series of dashes making up a broken line. It is normal practice that you place a dash at the beginning of the hidden line and another at the end where it meets an intersecting line.

Where are hidden lines used?

Hidden lines are used to show surfaces that are not directly visible. All surfaces must be shown in all views. If an edge or surface is blocked from view by another feature, it is drawn using a hidden line.

What is the symbol of hidden line?

Hidden lines indicate invisible edges or contours. Hidden lines consist of short dashes evenly spaced and are frequently referred to as dash lines.

Are hidden lines necessary?

Hidden lines in a drawing represent the edges where surfaces meet but are not directly visible. Hidden lines are omitted from pictorial drawings unless they are needed to make the drawing clear. Figure 3.46 shows a case in which hidden lines are needed because a projecting part cannot be clearly shown without them.

How are section lines shown?

Rule 1: A section lined area is always completely bounded by a visible outline. Rule 2: The section lines in all areas should be parallel. Section lines shown in opposite directions indicate a different part. Rule 3: All the visible edges behind the cutting plane should be shown.

What is the difference between hidden detail lines and centerlines?

Answer. Answer: In a scaled drawing, the hidden line can be measured from the start of the first dash, to the end of the last dash. Centre lines are drawn to indicate the exact centre of a component being drawn.

What are visible lines?

Visible lines are the edges or “outlines” of an object. They are drawn as solid lines with a thick/heavy weight.

What is hidden line in CAD?

When you create hidden line projections, the 3D objects that you select are copied and collected into an unnamed (also called anonymous) 2D block. The unnamed block can be placed in your drawing in the current 3D view, or placed parallel to the XY plane to be viewed in plan view.

How do section views work?

A sectional view or a section looks inside an object. Sections are used to clarify the interior construction of a part that can not be clearly described by hidden lines in exterior views. By taking an imaginary cut through the object and removing a portion, the inside features may be seen more clearly.

What is used to show hidden edges?

Right-click the drawing view and select Properties. Select the Show Hidden Edges tab. Select a feature or component from either the drawing view or the FeatureManager design tree to add it to the list of items to be shown with hidden lines.