What API does K-3D use for displaying 3D graphics ?
K-3D makes extensive use of OpenGL in the user interface. This allows the program to easily benefit from hardware acceleration on the end-user’s platform. K-3D version <= 0.4 connect to the OpenGL API through the SDPGL library, which wraps the OpenGL functions so that they can be traced. When SDPGL_TRACE is defined at build time, all OpenGL calls will be logged to stdout for analysis.