honeybee_plus.radiance.geometry.mesh module

Radiance Transfunc Mesh.

http://radsite.lbl.gov/radiance/refer/ray.html#Mesh

class honeybee_plus.radiance.geometry.mesh.Mesh(name, modifier=None, values=None, is_opaque=None)

Bases: honeybee_plus.radiance.geometry.geometrybase.RadianceGeometry

Radiance Mesh.

A mesh is a compound surface, made up of many triangles and an octree data structure to accelerate ray intersection. It is typically converted from a Wavefront .OBJ file using the obj2mesh program.

mod mesh id 1+ meshfile transform 0 0

If the modifier is “void”, then surfaces will use the modifiers given in the original mesh description. Otherwise, the modifier specified is used in their place. The transform moves the mesh to the desired location in the scene. Multiple instances using the same meshfile take little extra memory, and the compiled mesh itself takes much less space than individual polygons would. In the case of an unsmoothed mesh, using the mesh primitive reduces memory requirements by a factor of 30 relative to individual triangles. If a mesh has smoothed surfaces, we save a factor of 50 or more, permitting very detailed geometries that would otherwise exhaust the available memory. In addition, the mesh primitive can have associated (u,v) coordinates for pattern and texture mapping. These are made available to function files via the Lu and Lv variables.