User n.: A programmer who will believe anything you tell him. Concept 3.2i : Drawing Quadrilateral Strips in 3D Space ======================================================== Idea: ===== OpenGL provides GL_QUAD_STRIP to render a quadrilateral strip. A call to glBegin(GL_QUAD_STRIP) draws : A series of quadrilaterals (four sided polygons) using vertices V0,V1,V3,V2 then V2,V3,V5,V4 then V4,V5,V6,V7 and so on. Experiment: =========== Vertices for an example quadrilateral strip are provided below. Try them and see the order in which they are connected to form the quadrilateral strip. glVertex3f(-2.0, -2.0, 4.0); glVertex3f(-2.2, 2.0, 4.0); glVertex3f(-0.2, -2.0, 4.0); glVertex3f(0.0, 2.2, 4.0); glVertex3f(2.2, 1.8, 4.0); glVertex3f(2.0, 2.4, 4.0); glVertex3f(3.4, 1.65, 4.0); glVertex3f(3.7, 2.55, 4.0);