Create simple cube for OpenGL rendering

Simple Cube

void SimpleCube::init()
{
	//front
	normals.emplace_back(glm::vec3(0,0,1));
	vertices.push_back(glm::vec3(-0.5,-0.5,0.5));
	vertices.push_back(glm::vec3(0.5,-0.5,0.5));
	vertices.push_back(glm::vec3(0.5,0.5,0.5));
	vertices.push_back(glm::vec3(-0.5,0.5,0.5));
	//side right
	normals.emplace_back(glm::vec3(1,0,0));
	vertices.push_back(glm::vec3(0.5,-0.5,0.5));
	vertices.push_back(glm::vec3(0.5,-0.5,-0.5));
	vertices.push_back(glm::vec3(0.5,0.5,-0.5));
	vertices.push_back(glm::vec3(0.5,0.5,0.5));
	//back
	normals.emplace_back(glm::vec3(0,0,-1));
	vertices.push_back(glm::vec3(0.5,-0.5,-0.5));
	vertices.push_back(glm::vec3(-0.5,-0.5,-0.5));
	vertices.push_back(glm::vec3(-0.5,0.5,-0.5));
	vertices.push_back(glm::vec3(0.5,0.5,-0.5));
	//side left
	normals.emplace_back(glm::vec3(-1,0,0));
	vertices.push_back(glm::vec3(-0.5,-0.5,-0.5));
	vertices.push_back(glm::vec3(-0.5,-0.5,0.5));
	vertices.push_back(glm::vec3(-0.5,0.5,0.5));
	vertices.push_back(glm::vec3(-0.5,0.5,-0.5));
	//bottom
	normals.emplace_back(glm::vec3(0,-1,0));
	vertices.push_back(glm::vec3(0.5,-0.5,-0.5));
	vertices.push_back(glm::vec3(0.5,-0.5,0.5));
	vertices.push_back(glm::vec3(-0.5,-0.5,0.5));
	vertices.push_back(glm::vec3(-0.5,-0.5,-0.5));	
	//top
	normals.emplace_back(glm::vec3(0,1,0));
	vertices.push_back(glm::vec3(-0.5,0.5,0.5));
	vertices.push_back(glm::vec3(0.5,0.5,0.5));
	vertices.push_back(glm::vec3(0.5,0.5,-0.5));
	vertices.push_back(glm::vec3(-0.5,0.5,-0.5));
}