//void glRectfv (const float *v1, const float *v2) func Rectfv(a, b *[2]float32) { C.glRectfv((*C.GLfloat)(&a[0]), (*C.GLfloat)(&b[0])) }
//void glRectfv (const float *v1, const float *v2) func Rectfv(a, b []float32) { if len(a) != 2 || len(b) != 2 { panic(ErrorInputSize) } C.glRectfv((*C.GLfloat)(&a[0]), (*C.GLfloat)(&b[0])) }