how to define a new ospray geometry type and 'plug' this into ospray. In particular, how this geometry can use its "commit()" method to query data the user has added to it.
how to use embree and ispc to implement this geometry type's intersect() and postIntersect() functoins
how to do this through a 'module' that is dynamically loadable; and
how to use this module - and geometry - from within your own applications

Using this example you should be able to write your own modules, with your own geometry types. For the purpose of this geometry we have chosen a intentionally very simple type of geometry - a bilinear patch.

Notes:

Names matter. E.g., for ospray to find the module "myModuleName" the module has to build a library of name libospray_module_myModuleName.so. Similarly, a module that wants to define a new geometry type "MyGeometry" has to have a OSPRAY_REGISTER_GEOMETRY(WhatEverYouCallItInYourImplementation,MyGeometry) macro invocation in one of its cpp files.
This example only demonstrates how to write a geometry type. It is similarly possible to write new renderers, new camera types, new volume types, etc.

Running the Example

Build OSPRay (make sure that OSPRAY_MODULE_BILINEAR_PATCH is on!), then in your build directory, do a

  ./ospExampleViewer --sg:module bilinear_patches ../modules/pluggableGeometryExample/examples/shadows.patches --renderer pt