cv 07 ugr

import org.lwjgl.glfw.*;
import org.lwjgl.opengl.GL;

import static org.lwjgl.glfw.GLFW.*;
import static org.lwjgl.opengl.GL11.*;
import static org.lwjgl.system.MemoryUtil.*;

public class cv07 {
    private int sirka = 800;
    private int vyska = 600;

    void pyramida(float r, float g, float b) {
        glColor3f(r,g,b);
        glBegin(GL_TRIANGLES);
        glVertex3f(1.0f, 0f, 1.0f);
        glVertex3f(0f, 2.0f, 0.0f);
        glVertex3f(-1.0f, 0f, 1.0f);

        glVertex3f(1.0f, 0f, -1.0f);
        glVertex3f(0f, 2.0f, 0.0f);
        glVertex3f(1.0f, 0f, 1.0f);

        glVertex3f(-1.0f, 0f, -1.0f);
        glVertex3f(0f, 2.0f, 0.0f);
        glVertex3f(1.0f, 0f, -1.0f);

        glVertex3f(-1.0f, 0f, 1.0f);
        glVertex3f(0f, 2.0f, 0.0f);
        glVertex3f(-1.0f, 0f, -1.0f);
        glEnd();

        glBegin(GL_QUADS);
        glVertex3f(1.0f, 0, -1.0f);
        glVertex3f(1.0f, 0, 1.0f);
        glVertex3f(-1.0f, 0, 1.0f);
        glVertex3f(-1.0f, 0, -1.0f);
        glEnd();
    }

    void vykresliGL() {
        glRotated(0.03,1,1,1);

//      glColor3f(1,1,1);
//      glBegin(GL_TRIANGLES);
//      glVertex3f(1f, 0f, 1.0f);
//      glVertex3f(0f, 2f, 0.0f);
//      glVertex3f(-1, 0f, 1.0f);
//
//      glColor3f(0,0,1);
//          glVertex3f(1f, 0f, -1.0f);
//          glVertex3f(0f, 2f, 0.0f);
//          glVertex3f(1f, 0f, 1.0f);
//
//      glColor3f(0,1,0);
//          glVertex3f(-1, 0f, -1.0f);
//          glVertex3f(0f, 2f, 0.0f);
//          glVertex3f(1f, 0f, -1.0f);
//
//      glColor3f(1,1,0);
//          glVertex3f(-1, 0f, 1.0f);
//          glVertex3f(0f, 2f, 0.0f);
//          glVertex3f(-1f, 0f, -1.0f);
//      glEnd();
//
//      glColor3f(1,0,0);
//      glBegin(GL_QUADS);
//      glVertex3f(1.0f, 0, -1.0f);
//          glVertex3f(1.0f, 0, 1.0f);
//      glVertex3f(-1.0f, 0, 1.0f);
//          glVertex3f(-1.0f, 0, -1.0f);
//      glEnd();

        pyramida(1, 0, 0);
        pyramida(0, 1, 0);

        //pyramida(0, 1, 0);
        //pyramida(0, 0, 1);

    }

    long window;
    GLFWErrorCallback errorCallback;
    GLFWKeyCallback   keyCallback;

    void spusti() {
        try {
            init();
            loop();

            glfwDestroyWindow(window);
            keyCallback.free();
        } finally {
            glfwTerminate();
            errorCallback.free();
        }
    }

    void init() {
        glfwSetErrorCallback(errorCallback = GLFWErrorCallback.createPrint(System.err));
        if (!glfwInit())
            throw new IllegalStateException("Chyba pri inicializacii GLFW!!!");

        window = glfwCreateWindow(sirka, vyska, "UGR1", NULL, NULL);
        if ( window == NULL )
            throw new RuntimeException("Chyba pri vytvoreni GLFW okna!!!");

        glfwSetKeyCallback(window, keyCallback = new GLFWKeyCallback() {
            @Override
            public void invoke(long window, int key,
                    int scancode, int action, int mods) {
                if (key == GLFW_KEY_ESCAPE && action == GLFW_RELEASE)
                    glfwSetWindowShouldClose(window, true);

            }});

        GLFWVidMode vidmode = glfwGetVideoMode(glfwGetPrimaryMonitor());
        glfwSetWindowPos(window, (vidmode.width() - sirka) / 2, (vidmode.height() - vyska) / 2);

        glfwMakeContextCurrent(window);
        glfwSwapInterval(0);
        glfwShowWindow(window);

        GL.createCapabilities();

    }

    private static void gluPerspective(double fov, double aspect, double zNear, double zFar) {
        double fH = Math.tan(fov*Math.PI/360.0) * zNear;
        double fW = fH * aspect;
        glFrustum( -fW, fW, -fH, fH, zNear, zFar);
    }


    void loop() {
        glViewport(0,0,sirka,vyska);

        glMatrixMode(GL_PROJECTION);
        glLoadIdentity();
        gluPerspective(45.0f, (sirka/(1.0*vyska)), 0.1f, 100.0f);

        glMatrixMode( GL_MODELVIEW );
        glLoadIdentity();

        glClearColor( 0.f, 0.f, 0.f, 1.f ); //Initialize clear color

        glShadeModel(GL_SMOOTH);
        glTranslatef(0f, 0.0f, -10.0f);
        glCullFace(GL_BACK); glEnable(GL_CULL_FACE);
        while ( !glfwWindowShouldClose(window) ) {
            glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
            vykresliGL();

            glfwSwapBuffers(window);

            glfwPollEvents();
        }
    }

    public static void main(String[] args) {
        new cv07().spusti();
    }
}