#include <GL/glut.h>

float rotateX = 0.0f;
float rotateY = 0.0f;
int mouseX, mouseY;
bool mouseLeftDown = false;

void initGL() {
    glEnable(GL_DEPTH_TEST);
    glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
}

void drawCube() {
    glBegin(GL_QUADS);
        // Cara frontal (roja)
        glColor3f(1.0f, 0.0f, 0.0f);
        glVertex3f(-0.5f, -0.5f,  0.5f);
        glVertex3f( 0.5f, -0.5f,  0.5f);
        glVertex3f( 0.5f,  0.5f,  0.5f);
        glVertex3f(-0.5f,  0.5f,  0.5f);

        // Cara trasera (verde)
        glColor3f(0.0f, 1.0f, 0.0f);
        glVertex3f(-0.5f, -0.5f, -0.5f);
        glVertex3f( 0.5f, -0.5f, -0.5f);
        glVertex3f( 0.5f,  0.5f, -0.5f);
        glVertex3f(-0.5f,  0.5f, -0.5f);

        // ... Agrega las otras 4 caras con diferentes colores
    glEnd();
}

void display() {
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    glLoadIdentity();
    
    glTranslatef(0.0f, 0.0f, -5.0f);
    glRotatef(rotateX, 1.0f, 0.0f, 0.0f);
    glRotatef(rotateY, 0.0f, 1.0f, 0.0f);
    
    drawCube();
    glutSwapBuffers();
}

void mouse(int button, int state, int x, int y) {
    if (button == GLUT_LEFT_BUTTON) {
        mouseLeftDown = (state == GLUT_DOWN);
        mouseX = x;
        mouseY = y;
    }
}

void motion(int x, int y) {
    if (mouseLeftDown) {
        rotateY += (x - mouseX);
        rotateX += (y - mouseY);
        mouseX = x;
        mouseY = y;
        glutPostRedisplay();
    }
}

void reshape(int width, int height) {
    glViewport(0, 0, width, height);
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    gluPerspective(45.0f, (float)width/height, 0.1f, 100.0f);
    glMatrixMode(GL_MODELVIEW);
}

int main(int argc, char** argv) {
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH);
    glutInitWindowSize(800, 600);
    glutCreateWindow("Cubo Giratorio - Linux");
    
    initGL();
    
    glutDisplayFunc(display);
    glutReshapeFunc(reshape);
    glutMouseFunc(mouse);
    glutMotionFunc(motion);
    
    glutMainLoop();
    return 0;
}