Surface

class genesis.options.surfaces.Surface(*, color: tuple[float, ...] | None = None, opacity: float | None = None, roughness: float | None = None, metallic: float | None = None, emissive: tuple[float, ...] | None = None, ior: float | None = None, default_roughness: float = 1.0, vis_mode: typing.Literal['visual', 'collision', 'particle', 'sdf', 'recon'] | None = None, smooth: bool = True, double_sided: bool | None = None, cutoff: float = 180.0, normal_diff_clamp: float = 180.0, recon_backend: typing.Literal['splashsurf', 'openvdb'] = 'splashsurf', generate_foam: bool = False, foam_options: genesis.options.misc.FoamOptions = <factory>) → None

Base class for all surfaces types in Genesis.

A Surface object encapsulates all visual information used for rendering an entity or its sub-components (links, geoms, …). The surface contains different types of textures depending on the surface type (e.g. diffuse, specular, roughness, metallic, normal, emissive). Each one of them is a gs.textures.Texture object.

Tip

If any of the textures only has single value (instead of a map), you can use the shortcut parameter (e.g., color, roughness, metallic, emissive) instead of creating a texture object.

Note

This class should not be instantiated directly.

Parameters:

• color (tuple | None, optional) – Color of the surface. Shortcut for the primary texture with a single color.

• opacity (float | None, optional) – Opacity of the surface. Shortcut for opacity_texture with a single value.

• roughness (float | None, optional) – Roughness of the surface. Shortcut for roughness_texture with a single value.

• metallic (float | None, optional) – Metalness of the surface. Shortcut for metallic_texture with a single value.

• emissive (tuple | None, optional) – Emissive color of the surface. Shortcut for emissive_texture with a single color.

• ior (float, optional) – Index of Refraction.

• default_roughness (float, optional) – Default roughness value when roughness is not set and the asset does not have a roughness texture. Defaults to 1.0.

• vis_mode (str | None, optional) – How the entity should be visualized, e.g. - ‘visual’: Render the entity’s visual geometry. - ‘collision’: Render the entity’s collision geometry. - ‘particle’: Render the entity’s particle representation (if applicable). - ‘sdf’: Render the reconstructed surface mesh of the entity’s sdf. - ‘recon’: Render the reconstructed surface mesh of the entity’s particle representation.

• smooth (bool, optional) – Whether to smooth face normals by interpolating vertex normals.

• double_sided (bool | None, optional) – Whether to render both sides of the surface. Useful for non-watertight 2D objects. Defaults to True for Cloth material and False for others.

• cutoff (float) – The cutoff angle of emission. Defaults to 180.0.

• normal_diff_clamp (float, optional) – Controls the threshold for computing surface normals by interpolating vertex normals.

• recon_backend (str, optional) – Backend for surface reconstruction. Possible values are [‘splashsurf’, ‘openvdb’]. Defaults to ‘splashsurf’.

• generate_foam (bool, optional) – Whether to generate foam particles for visual effects for particle-based entities.

• foam_options (gs.options.FoamOptions, optional) – Options for foam generation.