func NormalPointer(xtype uint32, stride int32, pointer unsafe.Pointer) {
	C.glowNormalPointer(gpNormalPointer, (C.GLenum)(xtype), (C.GLsizei)(stride), pointer)
}
func NormalPointer(xtype uint32, stride int32, pointer unsafe.Pointer) {
	C.glowNormalPointer(gpNormalPointer, (C.GLenum)(xtype), (C.GLsizei)(stride), pointer)
}
func NormalPointer ( xtype uint32 , stride int32 , pointer unsafe . Pointer ) { C . glowNormalPointer ( gpNormalPointer , ( C . GLenum ) ( xtype ) , ( C . GLsizei ) ( stride ) , pointer ) }
// define an array of normals
define an array of normals