//void glVertex2dv (const float64 *v) func Vertex2dv(v []float64) { if len(v) != 2 { panic(ErrorInputSize) } C.glVertex2dv((*C.GLdouble)(&v[0])) }
//void glVertex2dv (const float64 *v) func Vertex2dv(v *[2]float64) { C.glVertex2dv((*C.GLdouble)(&v[0])) }