func display() {
gl.Clear(gl.COLOR_BUFFER_BIT)
gl.Begin(gl.TRIANGLES)
l := t.units
for e := l.Front(); e != nil; e = e.Next() {
b := e.Value.(*Entity)
//r := b.rot_matrix
p := b.pos
gl.Color3f(0.0, 0.0, 1.0) /* blue */
gl.Vertex2f(p[0], p[1])
gl.Color3f(0.0, 1.0, 0.0) /* green */
gl.Vertex2f(20+p[0], 20+p[1])
gl.Color3f(1.0, 0.0, 0.0) /* red */
gl.Vertex2f(p[0], 20+p[1])
}
gl.End()
gl.Flush() /* Single buffered, so needs a flush. */
glut.SwapBuffers()
}
func display() {
gl.Clear(gl.COLOR_BUFFER_BIT)
drawShip(angle)
drawBullets()
glut.SwapBuffers()
}