package org engine import org lwjgl LWJGLException import org lwjgl op

package org.engine;

import org.lwjgl.LWJGLException;
import org.lwjgl.opengl.Display;
import org.lwjgl.opengl.DisplayMode;
import org.lwjgl.opengl.GL11;
import org.lwjgl.util.glu.GLU;

import org.newdawn.slick.opengl.Texture;
import org.newdawn.slick.opengl.TextureLoader;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;

public class GLEngine {
    private int width; // ширина окна
    private int height; // высота окна
    private String title; // заголовок окна
    
    private Texture texture;

    private int rotate = 1;
    private float rotateX = 0.0f;

    private void loadTexture()  {

    }

    public GLEngine(String title, int width, int height, int x, int y) throws FileNotFoundException, IOException {  // конструктор класса
        this.width = width;
        this.height = height;
        this.title = title;
        this.x = x;
        this.y = y;

        texture = TextureLoader.getTexture("JPG", new FileInputStream(new File("/Users/nikita/IdeaProjects/OpenGLLab1/stones.jpg")));
    }

    private void initGL() throws LWJGLException {
        Display.setDisplayMode(new DisplayMode(width, height));  // задаём размер экрана
        Display.setTitle(title);  // задаём заголовок экрана
        Display.create();  // создаём окно с заданным форматом пикселей

        GL11.glClearColor(0.0f, 0.0f, 0.0f, 0.0f);		// This Will Clear The Background Color To Black
        GL11.glClearDepth(1.0);				// Enables Clearing Of The Depth Buffer
        GL11.glDepthFunc(GL11.GL_LESS);			        // The Type Of Depth Test To Do
        GL11.glEnable(GL11.GL_DEPTH_TEST);		        // Enables Depth Testing
        GL11.glShadeModel(GL11.GL_SMOOTH);			// Enables Smooth Color Shading

        GL11.glMatrixMode(GL11.GL_PROJECTION);
        GL11.glLoadIdentity();				// Reset The Projection Matrix

        GLU.gluPerspective(45.0f, (float) width / (float) height, 0.1f, 100.0f);

        GL11.glMatrixMode(GL11.GL_MODELVIEW);
    }

    public void start() throws LWJGLException {
        initGL();

        while (!Display.isCloseRequested()) { // пока окно не закрыто
            render(); // рисуем

            Display.update(); // обновляем экран
            Display.sync(60);
        }

        Display.destroy(); // уничтожаем окно
    }

    public void render() {
        GL11.glClear(GL11.GL_COLOR_BUFFER_BIT | GL11.GL_DEPTH_BUFFER_BIT);  // устанавливаем буферизацию для окна

        GL11.glLoadIdentity(); // Reset The View
        GL11.glTranslatef(0f, 0.0f, -8f);
        GL11.glRotatef(rotateX, -5.0f, 1.0f, 0.0f);
        GL11.glColor3f(0.5f, 0.5f, 1.0f);

        GL11.glBegin(GL11.GL_QUADS);
        GL11.glColor3f(1.0f, 1.0f, 0.0f);
        GL11.glVertex3f(1.0f, 1.0f, -1.0f);
        GL11.glVertex3f(-1.0f, 1.0f, -1.0f);
        GL11.glVertex3f(-1.0f, 1.0f, 1.0f);
        GL11.glVertex3f(1.0f, 1.0f, 1.0f);
        GL11.glColor3f(1.0f, 0.5f, 0.0f);
        GL11.glVertex3f(1.0f, -1.0f, 1.0f);
        GL11.glVertex3f(-1.0f, -1.0f, 1.0f);
        GL11.glVertex3f(-1.0f, -1.0f, -1.0f);
        GL11.glVertex3f(1.0f, -1.0f, -1.0f);
        GL11.glColor3f(1.0f, 0.0f, 0.0f);
        GL11.glVertex3f(1.0f, 1.0f, 1.0f);
        GL11.glVertex3f(-1.0f, 1.0f, 1.0f);
        GL11.glVertex3f(-1.0f, -1.0f, 1.0f);
        GL11.glVertex3f(1.0f, -1.0f, 1.0f);
        GL11.glColor3f(1.0f, 1.0f, 0.0f);
        GL11.glVertex3f(1.0f, -1.0f, -1.0f);
        GL11.glVertex3f(-1.0f, -1.0f, -1.0f);
        GL11.glVertex3f(-1.0f, 1.0f, -1.0f);
        GL11.glVertex3f(1.0f, 1.0f, -1.0f);
        GL11.glColor3f(0.0f, 0.0f, 1.0f);
        GL11.glVertex3f(-1.0f, 1.0f, 1.0f);
        GL11.glVertex3f(-1.0f, 1.0f, -1.0f);
        GL11.glVertex3f(-1.0f, -1.0f, -1.0f);
        GL11.glVertex3f(-1.0f, -1.0f, 1.0f);
        GL11.glColor3f(1.0f, 0.0f, 1.0f);
        GL11.glVertex3f(1.0f, 1.0f, -1.0f);
        GL11.glVertex3f(1.0f, 1.0f, 1.0f);
        GL11.glVertex3f(1.0f, -1.0f, 1.0f);
        GL11.glVertex3f(1.0f, -1.0f, -1.0f);
        GL11.glEnd();

        rotateX += 5.0f;
    }
}