In this chapter we mainly considered representing and drawing 3D objects using openFrameworks. For further learning, we suggest studying the following topics:
- Working with the
ofLightclass to control lights, that is, the type of light (spot light and point light), its position, light direction, and color parameters. See openFrameworks examplesexamples/3d/normalsExampleandexamples/3d/advanced3dExample. - Working with the
ofCameraandofEasyCamclasses to control the camera, that is, the position of the observer of the 3D scene. The camera lets you move easily through the virtual 3D world and also change perspective parameters. See openFrameworks examplesexamples/3d/cameraRibbonExampleandexamples/3d/easyCamExample. - Using 3D model files with the
.3dsand.daeextensions. You can load and draw such files as static or animated objects. Note that you can use 3D file models as a source of vertex data for further manipulation and processing. See openFrameworks examplesexamples/3d/modelNoiseExample,examples/addons/3DModelLoaderExample, andexamples/addons/assimpExample. - Rendering volumetric data using the marching cubes algorithm. This technique allows rendering isolines of an arbitrary function defined in some volume. It opens the possibility of drawing complex surfaces with constantly changing shape and number of connected components, such as metaballs. To use this algorithm, download and install the
ofxMarchingCubesaddon from ofxaddons.com and see its example. For more details on installing addons see Appendix A, Working with Addons.
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