# Primitive Cone

## Introduction

The primitive Cone is a predefined geometric shape that is used to create either a peaked cone or a truncated cone.

The primitive Cone can be created, modified, removed or used in other geometric operations (for example in a Boolean operation).

## Structure of the primitive

The primitive Cone is described by :

• A coordinate system for the creation of points (active coordinate system in the list available on the graphic View)
• The coordinates of the point center of the circle that is the large base of the cone, or an existing point
• The dimensions of the Cone primitive (radius of the large base, radius of the small base and height) defined in the active coordinate system
• The appearance of the cone (color and visibility)
Dialog box Illustration

## Result

The creation of a Cone primitive results in :

• Geometric entities (point, line, face, volume and object)
• A Geometric operation Cone_1. This geometric operation is a specific entity of the modeler that ensures the life cycle of the primitive (creation - modification - removal).

## Access

The different ways to access the primitive Cone are:

• By menu: Construction > Cone > New
• By icon:

## Creation of a cone

The creation process of a primitive Cone is presented in the table below.

Stage Description
1 Choice of the coordinate system for the primitive creation
2 Opening the dialog box Primitive Cone
3

Choice of the name of the generated geometric operation

(by default : Cone_1)

4

Definition of the center point of the large basis circle

• Either by coordinates
• Or by selection of an existing point
5 Definition of radius of the large basis circle
6

Definition of radius of the small basis circle

• Set 0 to obtain a peak cone
• Set different of 0 to obtain a truncated cone
7 Definition of the height
8

Choice of color visibility / appearance

(by default : visible and turquoise)

9 Validation by clicking on OK

The following entities are created in the tree :

• 1 object OBJ_CONE_1
• For a peak cone: 1 volume, 3 faces, 4 lines and 3 points
• For a truncated cone: 1 volume, 4 faces, 6 lines and 4 points
• 1 geometric operation CONE_1