jak przejść do 2d

Cześć. Jak za pomocą shaderów mogę przejść do widoku 2d w programie, tak aby jakiś obiekt ciągle trzymał się kamerki? Jak próbowałem zrobić jakiś podstawowy shader i użyć go po użyciu shadera "głównego" to nic się nie rysowało. Kod tego nowego shadera wygląda tak:

#version 330
layout(location = 0) in vec3 position;

void camera()
{
    gl_Position = vec4(position.x, position.y, position.z, 1.0);
}

void main() 
{
   camera();
}

A funkcja główna tak:

#include "Figures.h"
#include "Rendering.h"
#include "Window.h"
#include "Timer.h"
#include "MouseAndKeyboard.h"
#include "Skybox.h"
#include "Game.h"
#include "Logining.h"
#include "World.h"
#include "Auxiliary.h"
#include "Clock.h"
#include "Vertices.h"
#include "Entities.h"
#include "Skills.h"
#include "Building.h"

int main()
{
	srand(time(nullptr));
	Logining login;
	login.generateBasicFiles();

	int what = -1;

	std::cout << "0. Login" << std::endl << "1. Registry" << std::endl;

	while (what != 0)
	{
		std::cin >> what;
		if (what == 0)
		{
			login.loadLogins(Logining::gameFiles + "Game/logins.txt");
		}
		else if (what == 1)
		{
			login.registry(Logining::gameFiles + "Game/logins.txt");
		}
	}
	if (login.logining)
	{
		Rendering render;
		Window window(800, 600, "", 4, true, Logining::gameFiles + "Game/Saves/" + login.loginNow + "/Save/camera/cameraPosition.txt");

		Slots slots(render);
		Skills skills;

		Vertices vertices(Logining::gameFiles + "Game/Objects/orb.txt", Logining::gameFiles + "Game/Objects/floor/floorTexture.txt");

		GLfloat points[] = {
			-0.5f, -0.5f, 1.0f,
			0.0f, 0.5f, 1.0f,
			0.5f, -0.5f, 1.0f
		};

                //potem to zmienię
		GLuint vbo = 0;
		glGenBuffers(1, &vbo);
		glBindBuffer(GL_ARRAY_BUFFER, vbo);
		glBufferData(GL_ARRAY_BUFFER, sizeof(points), points, GL_STATIC_DRAW);

		GLuint vao = 0;
		glGenVertexArrays(1, &vao);
		glBindVertexArray(vao);
		glBindBuffer(GL_ARRAY_BUFFER, vbo);
		glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 0, NULL);
		glEnableVertexAttribArray(0);

		Skybox skybox(render);

		MouseAndKeyboard MAK;
		Game game(Logining::gameFiles + "Game/Saves/" + login.loginNow + "/Save/Player/statistics.txt", login.loginNow);

		GLuint guiShader = render.loadShader(Logining::gameFiles + "/Game/Shaders/guiShader.vert", Logining::gameFiles + "/Game/Shaders/guiShader.frag");

		Save save(Logining::gameFiles + "Game/Saves/" + login.loginNow + "/Save/Objects/saveObjects.txt");
		save.checkhowManyOrbs(Logining::gameFiles + "Game/Saves/" + login.loginNow + "/Save/Objects/howManyOrbs.txt");
		save.checkOrbs(Logining::gameFiles + "Game/Saves/" + login.loginNow + "/Save/Objects/saveOrbs.txt");
		save.checkTimers(Logining::gameFiles + "Game/Saves/" + login.loginNow + "/Save/Timers/saveTimers.txt");
		save.checkStatistics(Logining::gameFiles + "Game/Saves/" + login.loginNow + "/Save/Statistics/statistics.txt");
		AutoGeneratingWorld autoWorld(login.loginNow, window, save);

		Entities snail(vertices, save);
		Timer time(save, Logining::gameFiles + "Game/Saves/" + login.loginNow + "/Save/Timers/dayCycle.txt");

		std::mt19937 rand(std::time(nullptr));

		game.setCamera(window);

		render.deep();

		while (!glfwWindowShouldClose(window.window))
		{
			glUseProgram(Slots::shaders);
			glFrontFace(GL_CCW);


			render.ClearColor(0.15f, 0.15f, 1.0f, 0.0f, window.window_width, window.window_height);

			autoWorld.update(window, rand, save, game);

			window.moving(game.lifeFunctions, game.moveSpeed);
			MAK.closeWindow(window.window);

			time.dayAndNight(save);

			skybox.drawSkybox(window);
				
			snail.updateEntity(vertices, save);
			snail.aggresive(10.0f);
			snail.attack(game, "phisical", 10.0f, 1.0f, 1.5f);

			game.die(10, glm::vec3(0.0f, 0.0f, 0.0f));

			game.setTime(window);
			game.sendCamera(window, render);

                        //włączenie nowego shadera
			glUseProgram(guiShader);

			glFrontFace(GL_CW);

			glBindVertexArray(vao);
			glDrawArrays(GL_TRIANGLES, 0, 3);

			render.ProcessWindowEvents(window.window);
		} 

		save.savePos(Logining::gameFiles + "Game/Saves/" + login.loginNow + "/Save/Objects/saveObjects.txt");
		save.saveOrbs(Logining::gameFiles + "Game/Saves/" + login.loginNow + "/Save/Objects/saveOrbs.txt");
		save.saveHowManyOrbs(Logining::gameFiles + "Game/Saves/" + login.loginNow + "/Save/Objects/howManyOrbs.txt");
		save.saveTimers(Logining::gameFiles + "Game/Saves/" + login.loginNow + "/Save/Timers/saveTimers.txt");
		save.saveStatistics(Logining::gameFiles + "Game/Saves/" + login.loginNow + "/Save/Statistics/statistics.txt");
		time.saveDayCycle(Logining::gameFiles + "Game/Saves/" + login.loginNow + "/Save/Timers/dayCycle.txt");

		UnderFunctions::setWorldGenerator(Logining::gameFiles + "Game/Saves/" + login.loginNow + "/Save/Objects/generateOrbs.txt");
		UnderFunctions::setWorldGenerator(Logining::gameFiles + "Game/Saves/" + login.loginNow + "/Save/Objects/generateWorld.txt");

		game.saveStatistics(Logining::gameFiles + "Game/Saves/" + login.loginNow + "/Save/Player/statistics.txt");
		window.saveCameraPosition(Logining::gameFiles + "Game/Saves/" + login.loginNow + "/Save/camera/cameraPosition.txt");

		autoWorld.saveBiomes(Logining::gameFiles + "Game/Saves/" + login.loginNow + "/Save/Objects/biomes.txt");
		autoWorld.saveChunks(Logining::gameFiles + "Game/Saves/" + login.loginNow + "/Save/Objects/chunksPosition.txt");
		autoWorld.saveTrees(Logining::gameFiles + "Game/Saves/" + login.loginNow + "/Save/Objects/treesPosition.txt");
		autoWorld.build.saveFlowers(Logining::gameFiles + "/Game/Saves/" + login.loginNow + "/Save/Objects/flowers.txt");

		save.saveVector<Figures>(autoWorld.flyingIslands, Logining::gameFiles + "Game/Saves/" + login.loginNow +"/Save/Objects/flyingIslands.txt");

		render.Terminate(window.window);
	}
	return 0;
}