OpenGL primitives
GL_POINTS
individual points
GL_LINES
pairs of vertices interpreted as individual line segments
GL_LINE_STRIP
series of connected line segments
GL_LINE_LOOP
same as above, with a segment added between last and first vertices
GL_TRIANGLES
triples of vertices interpreted as triangles
GL_TRIANGLE_STRIP
linked strip of triangles
GL_TRIANGLE_FAN
linked fan of triangles
GL_QUADS
quadruples of vertices interpreted as four-sided polygons
GL_QUAD_STRIP
linked strip of quadrilaterals
GL_POLYGON
boundary of a simple, convex polygon
