User Manual 3.3 Infinite Rectangle Cylinder : Différence entre versions

Version du 4 avril 2018 à 13:40

Definition

The infinite rectangle cylinders are defined in a 3D space by their axis (a line or two equivalent vectors origin and direction), the direction of their local frame U vector and their two dimensions (length on the U axis and width on V) :

Implementation

The Infinite Rectangle Cylinder object in the SIRIUS library implements the [MAT_GEO_InfiniteCylinderInterface infinite cylinder interface] and has the following constructor and public methods :

• InfiniteEllipticCylinder(Vector3D, Vector3D, double, double)
• intersects(Line) : boolean
• getIntersectionPoints(Line) : Vector3D[]
• closestPointTo(Line) : Vector3D[]
• distanceTo(Line) : double

Please refer to the Javadoc for a complete list of public methods.

Instantiation

The object is built from three vectors (Vector3D) and two doubles :

Vector3D origin = new Vector3D(1.0, 1.0, 1.0);
Vector3D direction = new Vector3D(2.0, 0.0, 0.0);
Vector3D inputUvector = new Vector3D(1.0, 1.0, 0.0);
double length = 2.0;
double width = 4.0;
InfiniteRectangleCylindercylinder = new InfiniteRectangleCylinder(origin, direction, inputUvector, length, width);

Or directly from a Line, a non-colinear vector and two doubles :

Line axis = new Line(origin, direction);
Vector3D inputUvector = new Vector3D(1.0, 1.0, 0.0);
double length = 2.0;
double width = 4.0;
InfiniteRectangleCylindercylinder = new InfiniteRectangleCylinder(axis, inputUvector, length, width);

The local frame is built such as :

• The axis is the W vector
• U is orthogonal to W and its direction is defined by the 'input U vector"
• V completes the frame

Usage

Please refer to the [MAT_GEO_Home#HInteractions Interactions with other geometrical objects section] for methods inherited from the Shape interface.