rbSGL
sketchup API wrapper for view.draw, draw visual feedback for script development.
limited openGL exposure, unable to use things like VBO or even display list so everything has to be rebuilt on refresh
image showing test of the drawing module with game of life
known behaviour:
point (by draw_points) and text will draw as overlay over sketchup geometry
GL_POINTS will draw as circle or as pixel depending on graphics card/system, no control over point weight