eradiate.scenes.shapes.CuboidShape#

class eradiate.scenes.shapes.CuboidShape(id='shape', bsdf=None, center=_Nothing.NOTHING, edges=_Nothing.NOTHING)[source]#

Bases: eradiate.scenes.shapes._core.Shape

Cuboid shape [cuboid].

This shape represents an axis-aligned cuboid parametrised by the length of its edges and the coordinates of its central point.

Parameters

  • id (str, optional, default: "shape") – User-defined object identifier.

  • bsdf (BSDF or dict, optional) – BSDF attached to the shape. If a dictionary is passed, it is interpreted by bsdf_factory.convert(). If unset, no BSDF will be specified during the kernel dictionary generation: the kernel’s default will be used.

  • center (quantity or array-like, optional, default: [0, 0, 0]) – Coordinates of the centre of the cube. Unit-enabled field (default: ucc["length"]).

  • edges (quantity or array-like, default: [1, 1, 1]) – Lengths of the edges of the cuboid. Unit-enabled field (default: ucc["length"]).

Fields

  • id (str or None) – User-defined object identifier.

  • bsdf (BSDF or None) – BSDF attached to the shape.

  • center (quantity) – Coordinates of the centre of the cube.

  • edges (quantity) – Lengths of the edges of the cuboid.

classmethod atmosphere(top=<Quantity(100.0, 'kilometer')>, bottom=<Quantity(0.0, 'kilometer')>, bottom_offset=None, width=<Quantity(100.0, 'kilometer')>, bsdf=None)[source]#

This class method constructor provides a simplified parametrisation of the cuboid shape better suited for the definition of the atmosphere when configuring the one-dimensional model with a plane parallel geometry.

Parameters

  • top (quantity, optional, default: 100 km) – Top of atmosphere altitude. If a unitless value is passed, it is interpreted as ucc[“length”].

  • bottom (quantity, optional, default: 0 km) – Ground altitude. If a unitless value is passed, it is interpreted as ucc["length"].

  • bottom_offset (quantity, optional) – Additional offset by which the cuboid with be extended to avoid an exact match of its bottom face and the shape representing the surface. If left unset, defaults to a negative offset of 1 % of the atmosphere’s height, i.e. \(- 0.01 \times (\mathtt{top} - \mathtt{bottom})\). If a unitless value is passed, it is interpreted as ucc["length"].

  • width (quantity, optional, default: 100 km) – Length of the horizontal edges of the cuboid. If a unitless value is passed, it is interpreted as ucc["length"].

  • bsdf (BSDF or dict, optional, default: None) – A BSDF specification, forwarded to the main constructor.

Returns

CuboidShape – A cuboid shape which can be used as the atmosphere in a plane parallel geometry.

contains(p, strict=False)[source]#

Test whether a point lies within the cuboid.

Parameters

  • p (quantity or array-like) – An array of shape (3,) (resp. (N, 3)) representing one (resp. N) points. If a unitless value is passed, it is interpreted as ucc["length"].

  • strict (bool) – If True, comparison is done using strict inequalities (<, >).

Returns

result (array of bool or bool) – True iff p in within the cuboid.

kernel_dict(ctx)[source]#

Return a dictionary suitable for kernel scene configuration.

Parameters

ctx (KernelDictContext) – A context data structure containing parameters relevant for kernel dictionary generation.

Returns

KernelDict – Kernel dictionary which can be loaded as a Mitsuba object.