Meshes

Meshes are the simplest objects in Krang that can be rendered to an image. Each mesh is made from material that defines emission mechanics, and a geometry that defines where the emission mechanics occur in the spacetime.

Geometries

Geometries define the regions in spacetime where the emission physics originates from. Krang provides two concrete geometries and an interface for defining level-set geometries.

• ConeGeometry : A spin axis centered cone with its apex placed at the coordinate origin.

• MeshGeometry : A geometry made from a triangle mesh. The mesh is embedded by placing vertices at points in the Cartesian Kerr-Schild coordinate system. Check out the Raytracing a Triangular Mesh

There are convenience functions defines to translate, rotate and scale these geometries.

• AbstractLevelSetGeometry : Subtype this interface to define a geometry whose zero set is expressed in the Cartesian Kerr-Schild coordinate system. See the level-set example.

Materials

Materials define the local emission physics necessary to render geometries. Materials may sometimes need additional information, which can be stored in geometry fields. ConeGeometry, for example, accepts attributes as its second positional argument.