GL_LINES
Renders individual line segments.
GL_LINE_STRIP
Renders a connected sequence of lines.
GL_LINE_LOOP
Similar to GL_LINE_STRIP but closes the loop.
GL_TRIANGLE_STRIP
Renders a connected strip of triangles.
GL_QUADS
Renders individual quadrilaterals.
GL_POLYGON
Renders a single convex polygon.
GL_TRIANGLES
Renders are connected lines of triangles.
GL_POINTS
Renders individual points.