Version: 12

viktor.geometry

VisualisationError​

exception viktor.geometry.VisualisationError

Bases: `Exception`

Vector​

class viktor.geometry.Vector(x, y, z=0)

A 3-dimensional vector in space.

The following operations are supported:

• Negation

```v1 = Vector(1, 2, 3)
v2 = -v1  # results in Vector(-1, -2, -3)
```

```v1 = Vector(1, 2, 3)
v2 = Vector(1, 2, 3)
v3 = v1 + v2  # results in Vector(2, 4, 6)
```
• Subtraction

```v1 = Vector(1, 2, 3)
v2 = Vector(1, 2, 3)
v3 = v1 - v2  # results in Vector(0, 0, 0)
```
• (reverse) Multiplication

```v1 = Vector(1, 2, 3)
v2 = v1 * 3  # results in Vector(3, 6, 9)
v3 = 3 * v1  # results in Vector(3, 6, 9)
```
• Dot product

```v1 = Vector(1, 2, 3)
v2 = Vector(1, 2, 3)
res = v1.dot(v2)  # results in 14
```
• Cross product

```v1 = Vector(1, 0, 0)
v2 = Vector(0, 1, 0)
v3 = v1.cross(v2)  # results in Vector(0, 0, 1)
```
Parameters
• x (`float`) – X-coordinate.

• y (`float`) – Y-coordinate.

• z (`float`) – Z-coordinate (default: 0).

property squared_magnitude: float

Vector magnitude without square root; faster than magnitude.

Return type

`float`

property magnitude: float

Magnitude of the Vector.

Return type

`float`

property coordinates: Tuple[float, float, float]

Coordinates of the Vector as tuple (X, Y, Z).

Return type

`Tuple`[`float`, `float`, `float`]

normalize()

Return the normalized vector (with unit-length).

Raises

ValueError – if vector is a null-vector.

Return type

`Vector`

dot(other)

Scalar product of two vectors.

Parameters

other (`Vector`) – Second Vector

Return type

`float`

cross(other)

Vector product of two vectors.

Parameters

other (`Vector`) – Second Vector

Return type

`Vector`

Material​

class viktor.geometry.Material(name, density=None, price=None, *, threejs_type='MeshStandardMaterial', threejs_roughness=0.7, threejs_metalness=0.8, threejs_opacity=1.0, color=Color(221, 221, 221))
Parameters
• name (`str`) –

• density (`Optional`[`float`]) –

• price (`Optional`[`float`]) –

• color (`Color`) –

• threejs_type (`str`) – legacy, not used anymore

• threejs_roughness (`float`) – Between 0 - 1 where closer to 1 gives the material a rough texture.

• threejs_metalness (`float`) – Between 0 - 1 where closer to 1 gives the material a shiny metal look.

• threejs_opacity (`float`) – Between 0 - 1 where closer to 0 makes the material less visible.

property name: str
Return type

`str`

property density: Optional[float]
Return type

`Optional`[`float`]

property price: Optional[float]
Return type

`Optional`[`float`]

TransformableObject​

class viktor.geometry.TransformableObject

Bases: `abc.ABC`

translate(translation_vector)

Translate an object along a translation vector.

Parameters

translation_vector (`Union`[`Vector`, `Tuple`[`float`, `float`, `float`]]) – Vector along which translation is to be performed.

Return type

`TransformableObject`

rotate(angle, direction, point=None)

Rotate an object along an axis (direction) by an angle. Direction will follow right hand rule.

Parameters
• angle (`float`) – Angle of desired rotation in radians.

• direction (`Union`[`Vector`, `Tuple`[`float`, `float`, `float`]]) – Vector along which rotation is to be performed.

• point (`Union`[`Point`, `Tuple`[`float`, `float`, `float`], `None`]) – Point through which the rotation vector runs.

Return type

`TransformableObject`

mirror(point, normal)

Mirror an object on a plane defined by a point and normal vector.

Parameters
• point (`Union`[`Point`, `Tuple`[`float`, `float`, `float`]]) – Point within the mirror plane.

• normal (`Union`[`Vector`, `Tuple`[`float`, `float`, `float`]]) – Normal vector of the mirror plane.

Return type

`TransformableObject`

scale(scaling_vector)

Scale an object along a scaling vector.

Parameters

scaling_vector (`Union`[`Vector`, `Tuple`[`float`, `float`, `float`]]) – Vector along which scaling is to be performed.

Return type

`TransformableObject`

Group​

class viktor.geometry.Group(objects)
Parameters

objects (`Sequence`[`TransformableObject`]) – Objects that are part of the group.

Return type

`None`

property children: List[viktor.geometry.TransformableObject]
Return type

`List`[`TransformableObject`]

duplicate()
Return type

`Group`

Point​

class viktor.geometry.Point(x, y, z=0)

This class represents a point object, which is instantiated by means of 3-dimensional coordinates X, Y, and Z. It forms a basis of many structural 2D and 3D objects.

Example usage:

```p1 = Point(0, 0)  # creates a point in the origin
p2 = Point(1, 2, 3)
p3 = p2.copy()
```
Parameters
• x (`float`) – X-coordinate.

• y (`float`) – Y-coordinate.

• z (`float`) – (optional) Z-coordinate, defaults to 0.

Raises

TypeError – if the point is instantiated with a None value.

property coordinates: numpy.ndarray

Coordinates of the Point as array (X, Y, Z).

Return type

`ndarray`

property x: float

Returns the X-coordinate.

Return type

`float`

property y: float

Returns the Y-coordinate.

Return type

`float`

property z: float

Returns the Z-coordinate.

Return type

`float`

copy()

Returns a deep copy of the object.

Return type

`Point`

coincides_with(other)

Given another Point object, this method determines whether the two points coincide.

Return type

`bool`

vector_to(point)

Vector pointing from self to point.

Return type

`Vector`

get_local_coordinates(local_origin, spherical=False)

Method to determine the local coordinates of the current Point with respect to a ‘local origin’.

Return type

`ndarray`

Line​

class viktor.geometry.Line(start_point, end_point)
Parameters
property start_point: viktor.geometry.Point
Return type

`Point`

property end_point: viktor.geometry.Point
Return type

`Point`

property length: float
Return type

`float`

direction(normalize=True)

Direction vector between start and end point.

Return type

`Vector`

collinear(point)

True if point is collinear (in line) with Line, else False.

Return type

`bool`

property length_vector: numpy.ndarray
Return type

`ndarray`

property unit_vector: numpy.ndarray
Return type

`ndarray`

property geometries: Tuple[viktor.geometry.Point, viktor.geometry.Point]
Return type

`Tuple`[`Point`, `Point`]

property horizontal: bool
Return type

`bool`

property vertical: bool
Return type

`bool`

discretize(num=2)
Return type

`List`[`Point`]

revolve(*, material=None, **kwargs)

Revolve line around y-axis, only possible for lines in x-y plane.

Parameters

material (`Optional`[`Material`]) – optional material

Raises

NotImplementedError – when line is not in x-y plane

Return type

`LineRevolve`

get_line_function_parameters()

Get parameters for y=ax+b definition of a line

Return type

`Tuple`[`float`, `float`]

Returns

(a,b) (or nan if line is vertical)

find_overlap(other, inclusive=False)

Find the overlapping part of this line with another line.

The returned value depends on the situation:

• None, if no overlap is found or the two lines are not parallel

• Point, if an overlap is found with length equal to 0

• Line, if an overlap is found with length larger than 0

Parameters
• other (`Line`) – Other Line object

• inclusive (`bool`) – True to treat overlapping points as overlap

Return type

`Union`[`Point`, `Line`, `None`]

calculate_intersection_bounded_line_with_y​

viktor.geometry.calculate_intersection_bounded_line_with_y(line, y_intersection)

Calculate x intersection between two points and y value. Return None if no intersection is found.

```Returns x:                              Returns None:

o
/
y-----/---                              y---------
/:                                      o
/ :                                     /
o  x                                    o
```
Parameters
• line (`Line`) – Line object.

• y_intersection (`float`) – y-value of the intersection line.

Return type

`Optional`[`float`]

calculate_intersection_extended_line_with_y​

viktor.geometry.calculate_intersection_extended_line_with_y(line, y_intersection)

Calculates the intersection x value of a line at a given y value.

```Returns x:                              Returns x:

o
/
y-----/---                              y----------
/:                                      o:
/ :                                     / :
o  x                                    o  x
```
Parameters
• line (`Line`) – Line object.

• y_intersection (`float`) – y-value of the intersection line.

Return type

`float`

line_is_horizontal​

viktor.geometry.line_is_horizontal(line)

Returns True if line is horizontal.

Return type

`bool`

line_is_vertical​

viktor.geometry.line_is_vertical(line)

Returns True if line is vertical.

Return type

`bool`

x_between_bounds​

viktor.geometry.x_between_bounds(x, x1, x2, inclusive=True)

Method checks whether the x value is between the bounds x1 and x2.

Parameters
• x (`float`) – x-value to be evaluated.

• x1 (`float`) – Lower bound.

• x2 (`float`) – Upper bound.

• inclusive (`bool`) – If set to True, this method will also return True when the x value is equal to either x1 or x2.

Return type

`bool`

y_between_bounds​

viktor.geometry.y_between_bounds(y, y1, y2, inclusive=True)

Method checks whether the y value is between the bounds y1 and y2.

Parameters
• y (`float`) – y-value to be evaluated.

• y1 (`float`) – Lower bound.

• y2 (`float`) – Upper bound.

• inclusive (`bool`) – If set to True, this method will also return True when the y value is equal to either y1 or y2.

Return type

`bool`

point_is_on_bounded_line​

viktor.geometry.point_is_on_bounded_line(point, line, inclusive=True)

Method checks whether a given Point object is within the ends of a Line.

Parameters
• point (`Point`) – Point to be evaluated.

• line (`Line`) – Line object.

• inclusive (`bool`) – If set to True, this method will also return True when the point is located on one of the line ends.

Return type

`bool`

calculate_intersection_extended_line_with_x​

viktor.geometry.calculate_intersection_extended_line_with_x(line, x)

Returns the point at which a given line intersects a vertical axis at position x.

```Returns P(x, y):                        Returns P(x, y):

o
/
y-----P---                              y-----P----
/:                                      o:
/ :                                     / :
o  x                                    o  x
```
Parameters
• line (`Line`) – Line to be evaluated.

• x (`float`) – x-value of the intersection line.

Return type

`Point`

get_line_function_parameters​

viktor.geometry.get_line_function_parameters(line)

Returns the line function parameters (a, b) of a line (y = ax + b).

Return type

`Tuple`[`float`, `float`]

calculate_intersection_extended_lines​

viktor.geometry.calculate_intersection_extended_lines(extended_line1, extended_line2)

Calculate intersection between two lines defined by start/end points. The lines are assumed to extend infinitely: bounds are not taken account. Returns None if lines are parallel (i.e. no intersection exists).

```Returns P(x, y):                        Returns P(x, y):                        Returns None:

o
/
o-----P---o                             o--o P                                  o-----o
/                                      o
/                                      /                                    o--o
o                                      o
```
Parameters
Return type

`Optional`[`Point`]

calculate_intersection_bounded_line_extended_line​

viktor.geometry.calculate_intersection_bounded_line_extended_line(bounded_line, extended_line, inclusive=True)

Calculate intersection between line with fixed endpoints and line which is indefinitely extended.

Parameters
• bounded_line (`Line`) – Bounded Line object.

• extended_line (`Line`) – Extended Line object.

• inclusive (`bool`) – If set to True, this method will also check for end points that are located on one of the line ends.

Return type

`Optional`[`Point`]

calculate_intersection_bounded_lines​

viktor.geometry.calculate_intersection_bounded_lines(bounded_line1, bounded_line2, inclusive=True)

Calculate intersection between two lines with fixed endpoints.

Parameters
• bounded_line1 (`Line`) – First bounded Line object.

• bounded_line2 (`Line`) – Second bounded Line object.

• inclusive (`bool`) – If set to True, intersections on the endpoint will also be taken into account.

Return type

`Optional`[`Point`]

Revolve​

class viktor.geometry.Revolve(*args, rotation_angle=None, material=None, **kwargs)

Bases: `viktor.geometry.TransformableObject`, `abc.ABC`

Abstract base class of a revolved object.

abstract property surface_area: float
Return type

`float`

abstract property inner_volume: float
Return type

`float`

property thickness: float
Return type

`float`

property mass: float

Calculates the mass of the object as rho * area * thickness, with rho the density of the Material.

Return type

`float`

LineRevolve​

class viktor.geometry.LineRevolve(line, *args, material=None, **kwargs)

Returns an revolved object of a Line around the global y-axis.

An example revolve of a line between the point (1, 1, 0) and (3, 2, 0) is shown below, with the line object shown in black.

```line = Line(Point(1, 1, 0), Point(3, 2, 0))
line_rev = LineRevolve(line)
```
Parameters
property line: viktor.geometry.Line
Return type

`Line`

property uuid: uuid.UUID
Return type

`UUID`

property height: float
Return type

`float`

property surface_area: float

Returns the total exterior area of the revolved object.

Return type

`float`

property inner_volume: float

Returns the inner volume of the revolved object.

This method will only return a value if the defined Line meets the following conditions:

• it should NOT be horizontal, i.e. y_start != y_end

• it should be defined in positive y-direction, i.e. y_start < y_end

Return type

`float`

property geometries: Tuple[viktor.geometry.Line, ...]

Returns the Line object in format (line, ).

Return type

`Tuple`[`Line`, …]

Arc​

class viktor.geometry.Arc(centre_point, start_point, end_point, short_arc=True)

Creates a constant radius arc with three Points in the xy plane. Clockwise rotation creates an outward surface.

Parameters
• centre_point (`Point`) – Point in xy plane.

• start_point (`Point`) – Point in xy plane. Should have same distance to centre_point as end_point.

• end_point (`Point`) – Point in xy plane. Should have same distance to centre_point as start_point.

• short_arc (`bool`) – Angle of arc smaller than pi if True, larger than pi if False.

Return type

`float`

property centre_point: viktor.geometry.Point
Return type

`Point`

property start_point: viktor.geometry.Point
Return type

`Point`

property end_point: viktor.geometry.Point
Return type

`Point`

property theta1: float

Angle of the end point with respect to the x-axis in radians.

Return type

`float`

property theta2: float

Angle of the start point with respect to the x-axis in radians.

Return type

`float`

property short_arc: bool
Return type

`bool`

property geometries: Tuple[viktor.geometry.Point, viktor.geometry.Point, viktor.geometry.Point]
Return type

`Tuple`[`Point`, `Point`, `Point`]

property angle: float

Absolute angle of the arc in radians, which is the difference between theta1 and theta2.

Return type

`float`

property length: float

Arc length.

Return type

`float`

property theta1_theta2: Tuple[float, float]

Calculates the angles of the end (theta1) and start (theta2) points with respect to the x-axis in radians.

Return type

`Tuple`[`float`, `float`]

discretize(num=2)

Returns a discretized representation of the arc, as a list of Point objects. The amount of points can be specified using ‘num’, which should be larger than 1.

Return type

`List`[`Point`]

revolve(*, rotation_angle=None, material=None, **kwargs)

Returns an ArcRevolve object, revolved around the global y-axis.

Parameters
• rotation_angle (`Optional`[`float`]) – Angle of the revolved object according to the right-hand-rule, with the start of the rotation in positive z-direction. Angle in radians. If not specified, 2 pi will be used.

• material (`Optional`[`Material`]) – optional material

Return type

`ArcRevolve`

ArcRevolve​

class viktor.geometry.ArcRevolve(arc, *args, rotation_angle=None, material=None, **kwargs)

Returns a revolved object of an arc around the global y-axis.

In the example below, rotation_angle is equal to pi / 3:

Parameters
• arc (`Arc`) – Arc object.

• rotation_angle (`Optional`[`float`]) – Angle of the revolved object according to the right-hand-rule, with the start of the rotation in positive z-direction. Angle in radians. If not specified, 2 pi will be used.

• material (`Optional`[`Material`]) – optional material

property arc: viktor.geometry.Arc

`Arc`

Return type

`Arc`

property uuid: str
Return type

`str`

property surface_area: float

Total exterior area of the object.

Return type

`float`

property inner_volume: float

Returns the inner volume of the revolved object.

This method will only return a value if the defined Arc meets the following conditions:

• it should be short, i.e. short_arc=True

• the start- and end-point are located on the same side w.r.t. the y-axis of the center-point of the Arc

• it is defined in clockwise direction

Return type

`float`

property height: float

Height of the object.

Return type

`float`

property geometries: Tuple[viktor.geometry.Arc, ...]

Returns the Arc object in format (arc,).

Return type

Tuple[`Arc`]

Triangle​

class viktor.geometry.Triangle(point1, point2, point3)

Creates a Triangle object from 3D vertices.

Parameters
area()

Returns the area of the triangle.

Return type

`float`

property centroid: Tuple[float, float, float]

Returns the centroid (X, Y, Z) of the triangle.

Return type

`Tuple`[`float`, `float`, `float`]

property moment_of_inertia: Tuple[float, float]

Returns the moment of inertia (Ix, Iy) (only in x-y plane).

Return type

`Tuple`[`float`, `float`]

CartesianAxes​

class viktor.geometry.CartesianAxes(origin=Point(0.0, 0.0, 0.0), axis_length=1, axis_diameter=0.05)

Helper visualisation object to show positive x (red), y (green) and z (blue) axes.

Parameters
• origin (`Point`) – Coordinates of the origin.

• axis_length (`float`) – Length of the axes.

• axis_diameter (`float`) – Diameter of the axes.

RDWGSConverter​

class viktor.geometry.RDWGSConverter

Class that provides functions to translate latitude and longitude coordinates between the WGS system and RD system.

The RD coordinate system is a cartesian coordinate system that is frequently used for in civil engineering to describe locations in the Netherlands. The origin is located in france, so that for all of the Netherlands, both x (m) and y (m) values are positive and y is always larger then x. The domain in which the RD coordinate system is valid is:

• x: [-7000, 300000]

• y: [289000, 629000]

About the RD coordinate system: https://nl.wikipedia.org/wiki/Rijksdriehoeksco%C3%B6rdinaten

X0 = 155000
Y0 = 463000
phi0 = 52.1551744
lam0 = 5.38720621
static from_rd_to_wgs(coords)

Convert RD coordinates (x, y) to WGS coordinates [latitude, longitude].

```lat, lon = RDWGSConverter.from_rd_to_wgs((100000, 400000))
```
Parameters

coords (`Tuple`[`float`, `float`]) – RD coordinates (x, y)

Return type

`List`[`float`]

static from_wgs_to_rd(coords)

Convert WGS coordinates (latitude, longitude) to RD coordinates [x, y].

```x, y = RDWGSConverter.from_wgs_to_rd((51.58622, 4.59360))
```
Parameters

coords (`Tuple`[`float`, `float`]) – WGS coordinates (latitude, longitude)

Return type

`List`[`float`]

spherical_to_cartesian​

viktor.geometry.spherical_to_cartesian(spherical_coordinates)

Parameters

spherical_coordinates (`Tuple`[`float`, `float`, `float`]) – Spherical coordinates (r, theta, phi).

Return type

`ndarray`

Returns

Cartesian coordinates (x, y, z).

cartesian_to_spherical​

viktor.geometry.cartesian_to_spherical(cartesian_coordinates)

Parameters

cartesian_coordinates (`Tuple`[`float`, `float`, `float`]) – Cartesian coordinates (x, y, z).

Return type

`ndarray`

Returns

Spherical coordinates (r, theta, phi).

cylindrical_to_cartesian​

viktor.geometry.cylindrical_to_cartesian(cylindrical_coordinates)

Using ISO convention: https://commons.wikimedia.org/wiki/File:Coord_system_CY_1.svg

Reference plane is former Cartesian xy-plane and cylindrical axis is the Cartesian z-axis.

Parameters

cylindrical_coordinates (`Tuple`[`float`, `float`, `float`]) – Cylindrical coordinates (rho, phi, z).

Return type

`ndarray`

Returns

Cartesian coordinates (x, y, z).

cartesian_to_cylindrical​

viktor.geometry.cartesian_to_cylindrical(cartesian_coordinates)

Using ISO convention: https://commons.wikimedia.org/wiki/File:Coord_system_CY_1.svg

Reference plane is former Cartesian xy-plane and cylindrical axis is the Cartesian z-axis.

Parameters

cartesian_coordinates (`Tuple`[`float`, `float`, `float`]) – Cartesian coordinates (x, y, z).

Return type

`ndarray`

Returns

Cylindrical coordinates (rho, phi, z) with phi between -pi and +pi.

Extrusion​

class viktor.geometry.Extrusion(profile, line, profile_rotation=0, *, material=None)

Extruded object from a given set of points, which is called the profile. This profile should meet the following requirements:

• start point should be added at the end for closed profile

• points should be defined in z=0 plane

• circumference should be defined clockwise

Note that the profile is defined with respect to the start point of the Line object, i.e. the profile is defined in the local coordinate system. An example is given below of two extrusions with the same dimensions. Their corresponding Line objects are also visualized. The extrusion have the following profile:

```# black box
profile_b = [
Point(1, 1),
Point(1, 2),
Point(2, 2),
Point(2, 1),
Point(1, 1),
]
box_b = Extrusion(profile_b, Line(Point(4, 1, 0), Point(4, 1, 1)))

# yellow box
profile_y = [
Point(-0.5, -0.5),
Point(-0.5, 0.5),
Point(0.5, 0.5),
Point(0.5, -0.5),
Point(-0.5, -0.5),
]
box_y = Extrusion(profile_y, Line(Point(2, 2, 0), Point(2, 2, 1)))
```
Parameters
• profile (`List`[`Point`]) – Coordinates of cross-section.

• line (`Line`) – A line object is used to define the length (thickness) of the extrusion.

• profile_rotation (`float`) – Rotation of the profile around the Z-axis in degrees.

• material (`Optional`[`Material`]) – optional material

property profile: List[viktor.geometry.Point]
Return type

`List`[`Point`]

property material: viktor.geometry.Material
Return type

`Material`

property line: viktor.geometry.Line
Return type

`Line`

property uuid: str
Return type

`str`

property length: float
Return type

`float`

property geometries: viktor.geometry.Line
Return type

`Line`

property transformation: numpy.ndarray
Return type

`ndarray`

ArcExtrusion​

class viktor.geometry.ArcExtrusion(profile, arc, profile_rotation=0, n_segments=50, *, material=None)

Given an Arc and a cross-section of the extrusion, a discretized Extrusion object is returned.

The coordinates of the profile are defined with respect to the Arc and have a LOCAL coordinate system:

• z-axis is in direction of the arc from start to end.

• x-axis is in positive global z-axis.

• y-axis follows from the right-hand-rule.

Rotation of the profile is about the axis according to the right-hand-rule with LOCAL z-axis (see definition above).

Example:

```profile = [
Point(1, 1),
Point(1, 2),
Point(3, 2),
Point(3, 1),
Point(1, 1),
]
arc = Arc(Point(1, 1, 0), Point(3, 1, 0), Point(1, 3, 0))
arc_ext = ArcExtrusion(profile, arc, profile_rotation=10, n_segments=10)
```

This will result in the following visualization, where the Arc itself is also shown in the xy plane:

Parameters
• profile (`List`[`Point`]) – Coordinates of cross-section.

• arc (`Arc`) – An Arc object is used to define the direction of the extrusion.

• profile_rotation (`float`) – Rotation of the profile around its local Z-axis in degrees.

• n_segments (`int`) – Number of discretized segments of the arc, which is 50 by default.

• material (`Optional`[`Material`]) – optional material

CircularExtrusion​

class viktor.geometry.CircularExtrusion(diameter, line, *, open_ends=False, material=None)

This class is used to construct an extrusion which has a circular base, e.g. a circular foundation pile.

Parameters
• diameter (`float`) – Diameter of the cross-section.

• line (`Line`) – Line object along which the circular cross-section is extruded.

• open_ends (`bool`) – True if the extrusion ends should be open.

• material (`Optional`[`Material`]) – optional material

property line: viktor.geometry.Line
Return type

`Line`

property length: float
Return type

`float`

property diameter: float
Return type

`float`

Return type

`float`

property cross_sectional_area: float
Return type

`float`

RectangularExtrusion​

class viktor.geometry.RectangularExtrusion(width, height, line, profile_rotation=0, *, material=None)

Extruded object from a given set of points, which is called the profile. This profile should meet the following requirements:

• start point should be added at the end for closed profile

• points should be defined in z=0 plane

• circumference should be defined clockwise

Note that the profile is defined with respect to the start point of the Line object, i.e. the profile is defined in the local coordinate system. An example is given below of two extrusions with the same dimensions. Their corresponding Line objects are also visualized. The extrusion have the following profile:

```# black box
profile_b = [
Point(1, 1),
Point(1, 2),
Point(2, 2),
Point(2, 1),
Point(1, 1),
]
box_b = Extrusion(profile_b, Line(Point(4, 1, 0), Point(4, 1, 1)))

# yellow box
profile_y = [
Point(-0.5, -0.5),
Point(-0.5, 0.5),
Point(0.5, 0.5),
Point(0.5, -0.5),
Point(-0.5, -0.5),
]
box_y = Extrusion(profile_y, Line(Point(2, 2, 0), Point(2, 2, 1)))
```
Parameters
• profile – Coordinates of cross-section.

• line (`Line`) – A line object is used to define the length (thickness) of the extrusion.

• profile_rotation (`float`) – Rotation of the profile around the Z-axis in degrees.

• material (`Optional`[`Material`]) – optional material

property width: float

Width of the extrusion.

Return type

`float`

property height: float

Height of the extrusion.

Return type

`float`

property cross_sectional_area: float

Returns the area of the cross-section (width x height).

Return type

`float`

property inner_volume: float

Returns the inner volume of the extruded object.

Return type

`float`

SquareBeam​

class viktor.geometry.SquareBeam(length_x, length_y, length_z, *, material=None)

High level object to create a rectangular beam object around the origin. The centroid of the beam is located at the origin (0, 0, 0).

Parameters
• length_x (`float`) – Width of the extrusion in x-direction.

• length_y (`float`) – Length of the extrusion in y-direction.

• length_z (`float`) – Height of the extrusion in z-direction.

• material (`Optional`[`Material`]) – optional material

points_are_coplanar​

viktor.geometry.points_are_coplanar(points)

Given a set of a minimum of 3 Point objects, determines whether these points can be placed on a two-dimensional plane and hence are coplanar.

Parameters

points (`List`[`Point`]) – Points that are to be evaluated.

Return type

`bool`

lines_in_same_plane​

viktor.geometry.lines_in_same_plane(line1, line2)

Method to determine whether two Line objects are located in a shared plane and hence are coplanar.

Parameters
Return type

`bool`

calculate_distance_vector​

viktor.geometry.calculate_distance_vector(start_point, end_point)

Calculates the distance between start and end point in the direction start -> end.

Parameters
Return type

`ndarray`

convert_points_for_lathe​

viktor.geometry.convert_points_for_lathe(points)

Method can be used to convert Point objects to lists of dictionaries in the format: {‘x’: point.x, ‘y’: point.y}

Parameters

points (`Sequence`[`Point`]) – Point objects.

Return type

`List`[`dict`]

translation_matrix​

viktor.geometry.translation_matrix(direction)

Returns the translation matrix that corresponds to a give direction vector (3D).

Parameters

direction (`Union`[`Vector`, `Tuple`[`float`, `float`, `float`]]) – Direction vector of the translation.

Return type

`ndarray`

scaling_matrix​

viktor.geometry.scaling_matrix(scaling_vector)

Returns the scaling matrix that corresponds to a given scaling vector (3D).

Parameters

scaling_vector (`Union`[`Vector`, `Tuple`[`float`, `float`, `float`]]) – Three-dimensional scaling vector.

Return type

`ndarray`

rotation_matrix​

viktor.geometry.rotation_matrix(angle, direction, point=None)

Returns the rotation matrix that corresponds to a rotation about an axis defined by a point and direction. Angle in radians, direction in accordance to right-hand rule.

Example:

```R = rotation_matrix(pi/2, [0, 0, 1], [1, 0, 0])
np.allclose(np.dot(R, [0, 0, 0, 1]), [1, -1, 0, 1])  # True
```
Return type

`ndarray`

reflection_matrix​

viktor.geometry.reflection_matrix(point, normal)

Returns the reflection matrix to mirror at a plane defined by a point and a normal vector.

Parameters
• point (`Union`[`Point`, `Tuple`[`float`, `float`, `float`]]) – Point object.

• normal (`Union`[`Vector`, `Tuple`[`float`, `float`, `float`]]) – Normal vector of the mirror plane.

Return type

`ndarray`

unit_vector​

viktor.geometry.unit_vector(data, axis=None, out=None)

Returns the unit vector of a given vector.

Return type

`ndarray`

mirror_object​

viktor.geometry.mirror_object(obj, point, normal)

Function that mirrors an object through a plane. The plane is defined by a point and a normal vector. The return is a copy of the original object, mirrored over the specified plane.

Parameters
Return type

`TransformableObject`

volume_cone​

viktor.geometry.volume_cone(r, h)

Calculates the volume of a cone.

Parameters
• r (`float`) – Radius of the base.

• h (`float`) – Height of the cone.

Return type

`float`

surface_cone_without_base​

viktor.geometry.surface_cone_without_base(r, h)

Calculates the exterior surface of the cone, excluding the area of the circular base.

Parameters
• r (`float`) – Radius of the base.

• h (`float`) – Height of the cone.

Return type

`float`

surface_area_dome​

viktor.geometry.surface_area_dome(theta1, theta2, r, R)

Computes the surface area of a dome (arc-revolve).

Parameters
• theta1 (`float`) – Starting angle of arc in radians.

• theta2 (`float`) – Ending angle of arc in radians.

• r (`float`) – Radius of arc.

• R (`float`) – Distance from centre of arc to rotation line.

Return type

`float`

Returns

surface area of arc-revolve.

hex_to_rgb​

viktor.geometry.hex_to_rgb(value)

Return (red, green, blue) for the color given as #rrggbb.

Return type

`Tuple`[`int`, …]

rgb_to_hex​

viktor.geometry.rgb_to_hex(red, green, blue, include_hashtag=True)

Return color as #rrggbb for the given color values.

Return type

`str`

circumference_is_clockwise​

viktor.geometry.circumference_is_clockwise(circumference)
Method determines the direction of a set of points, and returns:
• True if the circumference is clockwise

• False if the circumference is counter-clockwise

Parameters

circumference (`List`[`Point`]) – Circumference in x,y-plane.

Return type

`bool`

Adds a Point object to a unique list of Point objects. The point is only added when not already present in the list.

Parameters
Return type

`Tuple`[`List`[`Point`], `int`]

get_vertices_faces​

viktor.geometry.get_vertices_faces(triangles)

Returns the vertices and faces of a list of Triangle objects.

Parameters

triangles (`List`[`Triangle`]) – List of triangle objects.

Return type

`Tuple`[`list`, `list`]

find_overlap​

viktor.geometry.find_overlap(region_a, region_b, inclusive=False)

Given to regions with upper and lower boundary, check if there is overlap and if so return a tuple with the overlap found

The direction of the given regions does not matter: (1, 2) will be handled exactly the same as (2, 1) The returned Tuple will always be in ascending order

Example usage:

```find_overlap((2, 4), (3, 5)) -> (3, 4)
find_overlap((4, 2), (5, 3)) -> (3, 4)
find_overlap((2, 3), (3, 4)) -> None
find_overlap((2, 3), (3, 4), inclusive=True) -> (3, 3)
```
Parameters
• region_a (`Tuple`[`float`, `float`]) – Tuple of values of the first region.

• region_b (`Tuple`[`float`, `float`]) – Tuple of values of the second region.

• inclusive (`bool`) – A flag to decide whether a point overlap is counted as overlap or not.

Return type

`Optional`[`Tuple`[`float`, `float`]]

Returns

A tuple with upper and lower bounds of the overlapping region, or None.

Pattern​

class viktor.geometry.Pattern(base_object, duplicate_translation_list)

Instantiates a pattern based on a base object and several duplicates, each translated by an input vector.

Parameters
• base_object (`TransformableObject`) – the object to be duplicated

• duplicate_translation_list (`List`[`List`[`float`]]) – a list of translation vectors, each of which generates a duplicate

LinearPattern​

class viktor.geometry.LinearPattern(base_object, direction, number_of_elements, spacing)

Instantiates a linear, evenly spaced, pattern along a single direction.

Parameters
• base_object (`TransformableObject`) – the object to be duplicated

• direction (`List`[`float`]) – a unit vector specifying in which direction the pattern propagates

• number_of_elements (`int`) – total amount of elements in the pattern, including the base object

• spacing (`float`) – the applied spacing

BidirectionalPattern​

class viktor.geometry.BidirectionalPattern(base_object, direction_1, direction_2, number_of_elements_1, number_of_elements_2, spacing_1, spacing_2)

Instantiates a two-dimensional pattern, evenly spaced in two separate directions

Parameters
• base_object (`TransformableObject`) – the object to be duplicated

• direction_1 (`List`[`float`]) – a unit vector specifying the first direction

• direction_2 (`List`[`float`]) – a unit vector specifying the second direction

• number_of_elements_1 (`int`) – total amount of elements along direction 1

• number_of_elements_2 (`int`) – total amount of elements along direction 2

• spacing_1 (`float`) – the applied spacing in direction 1

• spacing_2 (`float`) – the applied spacing in direction 2

Polygon​

class viktor.geometry.Polygon(points, *, surface_orientation=False, material=None, skip_duplicate_vertices_check=False)

2D closed polygon without holes in x-y plane.

Parameters
• points (`List`[`Point`]) – profile is automatically closed, do not add start point at the end. only the x and y coordinates are considered (z is set to 0). left hand rule around circumference determines surface direction

• surface_orientation (`bool`) –

• if True, the left hand rule around circumference determines surface direction

• if False, surface always in +z direction

• material (`Optional`[`Material`]) – optional material

• skip_duplicate_vertices_check (`bool`) – if True, duplicate vertices are not filtered on serialization of the triangles. This may boost performance (default: False).

Raises

ValueError

• if less than 3 points are provided.

• if points contains duplicates.

• if points form a polygon with self-intersecting lines.

• if points are all collinear.

has_clockwise_circumference()
Method determines the direction of the input points, and returns:
• True if the circumference is clockwise

• False if the circumference is counter-clockwise

Return type

`bool`

property cross_sectional_area: float
Return type

`float`

property centroid: Tuple[float, float]

Returns the centroid (X, Y) of the polygon.

Return type

`Tuple`[`float`, `float`]

property moment_of_inertia: Tuple[float, float]

Returns the moment of inertia (Ix, Iy) in xy-plane.

Return type

`Tuple`[`float`, `float`]

Polyline​

class viktor.geometry.Polyline(points)

Representation of a polyline made up of multiple straight line segments.

This class is immutable, meaning that all functions that perform changes on a polyline will return a mutated copy of the original polyline.

Parameters

points (`List`[`Point`]) – List of points, which may contain duplicate points. Note that when calling the individual lines of the polyline, duplicate points are filtered (i.e. zero-length lines are omitted).

classmethod from_lines(lines)

Create a polyline object from a list of lines the end of one line must always coincide with the start of the next

Parameters

lines (`Sequence`[`Line`]) – Sequence of lines

Return type

`Polyline`

is_equal_to(other)

Check if all points in this polyline coincide with all points of another polyline

Parameters

other (`Polyline`) – Other polyline

Return type

`bool`

property start_point: viktor.geometry.Point

First point in polyline.points

Return type

`Point`

property end_point: viktor.geometry.Point

Last point in polyline.points

Return type

`Point`

property lines: List[viktor.geometry.Line]

A list of lines connecting all polyline points. Lines between coincident points are skipped.

Return type

`List`[`Line`]

property x_min: Optional[float]

The lowest x-coordinate present within this polyline

Return type

`Optional`[`float`]

property x_max: Optional[float]

The highest x-coordinate present within this polyline

Return type

`Optional`[`float`]

property y_min: Optional[float]

The lowest y-coordinate present within this polyline

Return type

`Optional`[`float`]

property y_max: Optional[float]

The highest y-coordinate present within this polyline

Return type

`Optional`[`float`]

property z_min: Optional[float]

The lowest z-coordinate present within this polyline

Return type

`Optional`[`float`]

property z_max: Optional[float]

The highest z-coordinate present within this polyline

Return type

`Optional`[`float`]

get_reversed_polyline()

Returns a polyline that is the reverse of this one

Return type

`Polyline`

serialize()

Return a json serializable dict of form:

```[
{'x': point_1.x, 'y': point_1.y},
{'x': point_2.x, 'y': point_2.y}
]
```
Return type

`List`[`dict`]

classmethod from_dict(polyline_dict)

Turn a list of dictionaries generated in the serialize method back into a polyline object

Return type

`Polyline`

filter_duplicate_points()

Returns a new Polyline object. If two consecutive points in this polyline coincide, the second point will be omitted

Return type

`Polyline`

is_monotonic_ascending_x(strict=True)

Check if the x coordinates of the points of this polyline are ascending.

Parameters

strict (`bool`) – when set to false, equal x coordinates are accepted between points

Return type

`bool`

is_monotonic_ascending_y(strict=True)

Check if the y coordinates of the points of this polyline are ascending

Parameters

strict (`bool`) – when set to false, equal y coordinates are accepted between points

Return type

`bool`

intersections_with_polyline(other_polyline)

Find all intersections with another polyline and return them ordered according to the direction of this polyline

If the polylines are partly parallel, the start and end points of the parallel section will be returned as intersections. If one of the polylines is a subset of the other, or the two lines are completely parallel, no intersection will be found

Parameters

other_polyline (`Polyline`) –

Return type

`List`[`Point`]

intersections_with_x_location(x)

Find all intersections of this polyline with a given x location. Ordered from start to end of this polyline.

If this line is partly vertical, the start and end points of the vertical section will be returned as a intersection If this line is completely vertical, no intersection will be found.

Parameters

x (`float`) –

Return type

`List`[`Point`]

point_is_on_polyline(point)

Check if a given point lies on this polyline

Parameters

point (`Point`) –

Return type

`bool`

get_polyline_between(start_point, end_point, inclusive=False)

Given two points that both lie on a polyline, return the polyline that lies between those two points start_point has to lie before end_point on this polyline.

If the given start point lies after the given end point on this polyline, an empty polyline will be returned If the two given points are identical, it depends on the inclusive flag whether a polyline containing that point once, or an empty polyline will be returned

Parameters
Raises

ValueError – when one of the two given points does not lie on this polyline

Return type

`Polyline`

find_overlaps(other)

Find all overlapping regions of this polyline with another polyline. The returned overlapping regions will all point in the direction of this line. The overlap polylines will contain all points of both polylines, even if they only occur in one of the lines.

if no overlaps are found, an empty list will be returned.

Parameters

other (`Polyline`) –

Return type

`List`[`Polyline`]

combine_with(other)

Given two polylines that have at least one point in common and together form one line without any side branches, combine those two polylines The combined line will contain all points of both polylines.

Parameters

other (`Polyline`) –

Return type

`Polyline`

split(point)

return the two separate parts of this polyline before and after the given point

will raise a value error when the provided point does not lie on this polyline

Parameters

point (`Point`) –

Return type

`Tuple`[`Polyline`, `Polyline`]

classmethod get_lowest_or_highest_profile_x(profile_1, profile_2, lowest)

given two polylines with n intersections, return a third polyline that will always follow the lowest (or highest) of the two lines the x locations of the points of the two polylines should be not descending (lines from left to right or vertical) the returned polyline will only cover the overlapping range in x coordinates

If one of the profiles is an empty polyline, an empty polyline will be returned.

examples:

```                                   /----------------|
/         /-------|--------------------
profile_1: ----------------\     /         /        |
\   /         /         |_____________________________
profile_2:      -------------\-/         /
\_________/

get_lowest_or_highest_profile_x(cls, profile_1, profile_2, lowest=True) will return:

/-------|
/        |
/         |____________________
result:     -------------\           /
\_________/
```

Note that only the overlapping region of the two profiles is returned!

Parameters

Currently, this implementation is exclusive. Meaning that vertical line parts that lie on the start or end of the overlap region in x are not taken into account

Return type

`Polyline`

Cone​

class viktor.geometry.Cone(diameter, height, *, origin=None, orientation=None, material=None)

Creates a cone object.

Parameters
• diameter (`float`) – Diameter of the circular base surface.

• height (`float`) – Height from base to tip.

• origin (`Optional`[`Point`]) – Optional location of the centroid of the base surface (default: Point(0, 0, 0)).

• orientation (`Optional`[`Vector`]) – Optional orientation from origin to the tip (default: Vector(0, 0, 1)).

• material (`Optional`[`Material`]) – Optional material.

classmethod from_line(diameter, line, *, material=None)

Create a Cone object by a given base diameter and line.

Parameters
• diameter (`float`) – Diameter of the circular base surface.

• line (`Line`) – Line from base to top of the cone. The start point of the line represents the location of the center of the base, and the end point represents the tip of the cone.

• material (`Optional`[`Material`]) – Optional material.

Return type

`Cone`

Sphere​

class viktor.geometry.Sphere(centre_point, radius, width_segments=30, height_segments=30, material=None)

This class can be used to construct a spherical object around the specified coordinate.

The smoothness of the edges can be altered by setting width_segments and height_segments. In the example below both the default smoothness of 30 (left) and a rough sphere with 5 segments (right) is shown:

Parameters
• centre_point (`Point`) – Center point of the sphere.

• radius (`float`) – Radius of the sphere.

• width_segments (`float`) – Sets the smoothness in xz-plane.

• height_segments (`float`) – Sets the smoothness in yz-plane.

• material (`Optional`[`Material`]) – Optionally a custom material can be set.

diameter()
Return type

`float`

circumference()
Return type

`float`

surface_area()
Return type

`float`

volume()
Return type

`float`

Torus​

Create a torus object

Parameters
• radius_cross_section (`float`) –

• radius_rotation_axis (`float`) – measured from central axis to centre of cross-section.

• rotation_angle (`float`) – optional argument to control how large of a torus section you want. 2pi for complete torus

• material (`Optional`[`Material`]) – optional material

property inner_volume: float
Return type

`float`

property material: viktor.geometry.Material
Return type

`Material`

TriangleAssembly​

class viktor.geometry.TriangleAssembly(triangles, *, material=None, skip_duplicate_vertices_check=False)

Fundamental visualisation geometry, built up from triangles. Right hand rule on triangle circumference determines the surface direction.

Parameters
• triangles (`List`[`Triangle`]) – Triangles of the assembly.

• material (`Optional`[`Material`]) – optional material.

• skip_duplicate_vertices_check (`bool`) – if True, duplicate vertices are not filtered on serialization of the triangles. This may boost performance (default: False).

GeoPoint​

class viktor.geometry.GeoPoint(lat, lon)

Geographical point on the Earth’s surface described by a latitude / longitude coordinate pair.

This object can be created directly, or will be returned in the parameter set when using a `GeoPointField`.

Parameters
• lat (`float`) – Latitude.

• lon (`float`) – Longitude.

classmethod from_rd(coords)

Instantiates a GeoPoint from the provided RD coordinates.

Parameters

coords (`Tuple`[`float`, `float`]) – RD coordinates (x, y).

Return type

`GeoPoint`

property rd: Tuple[float, float]

RD representation (x, y) of the GeoPoint.

Return type

`Tuple`[`float`, `float`]

GeoPolyline​

class viktor.geometry.GeoPolyline(*points)

Geographical polyline on the Earth’s surface described by a a list of `GeoPoints`.

This object can be created directly, or will be returned in the parameter set when using a `GeoPolylineField`.

Parameters

points (`GeoPoint`) – Geo points (minimum 2).

property points: List[viktor.geometry.GeoPoint]
Return type

`List`[`GeoPoint`]

GeoPolygon​

class viktor.geometry.GeoPolygon(*points)

Geographical polygon on the Earth’s surface described by a a list of `GeoPoints`.

This object can be created directly, or will be returned in the parameter set when using a `GeoPolygonField`.

Parameters

points (`GeoPoint`) – Geo points (minimum 3). The profile is automatically closed, so it is not necessary to add the start point at the end.

property points: List[viktor.geometry.GeoPoint]
Return type

`List`[`GeoPoint`]