(glCoreVertex2f x0 y0 . xtra)

glCoreVertex2f simulate OpenGL vertex call.

Parameter	Description
x0	x coordinate of Vertex
y0	y coordinate of Vertex
xtra	Optional: tx and ty

Example

Example 1: glgui:draw-line, a very inefficient way of drawing a line

(define (glgui:draw-line x1 y1 x2 y2 color)
  (glCoreColor color)
  (glCoreBegin GL_LINES)
  (glCoreVertex2f (flo x1) (flo y1))
  (glCoreVertex2f (flo x2) (flo y2))
  (glCoreEnd))