411 REFERENCE · Wikibooks
OpenGL Programming/Basics/LinesPoints
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
Note that this is for very outdated versions of OpenGL.
Drawing points
glBegin(GL_POINTS);
glVertex2f(0.5f, 0.5f);
glVertex2f(0.5f, -0.5f);
glVertex2f(-0.5f, 0.5f);
glVertex2f(-0.5f, -0.5f);
glEnd();
Drawing lines
/* Draws two horizontal lines */
glBegin(GL_LINES);
glVertex2f(0.5f, 0.5f);
glVertex2f(-0.5f, 0.5f);
glVertex2f(-0.5f, -0.5f);
glVertex2f(0.5f, -0.5f);
glEnd();
Loop of lines
/* Draws a square */
glBegin(GL_LINE_LOOP);
glVertex2f(0.5f, 0.5f);
glVertex2f(-0.5f, 0.5f);
glVertex2f(-0.5f, -0.5f);
glVertex2f(0.5f, -0.5f);
glEnd();
Connected lines
/* Draws a 'C' */
glBegin(GL_LINE_STRIP);
glVertex2f(0.5f, 0.5f);
glVertex2f(-0.5f, 0.5f);
glVertex2f(-0.5f, -0.5f);
glVertex2f(0.5f, -0.5f);
glEnd();