/* Author: Josh Holtrop
 * DornerWorks screensaver
 * This module implements a very simple screensaver mode.
 * It just creates a DW logo and then continuously spins around it.
 */

#include <GL/gl.h>
#include <GL/glu.h>
#include "PlainSpin.h"

#include <iostream>
using namespace std;

/* construct screensaver mode and do some basic OpenGL setup */
PlainSpin::PlainSpin(SSMain * _SSMain) : SSMode(_SSMain)
{
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    gluPerspective(60.0,
                   (double)m_SSMain->getWidth()
                     / (double)m_SSMain->getHeight()
                     / (double)m_SSMain->getNumMonitors(),
                   0.01,
                   1000.01);
    glMatrixMode(GL_MODELVIEW);
}

/* called every time this screensaver mode should redraw the screen */
void PlainSpin::update()
{
    SSMode::update();
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    int numMonitors = m_SSMain->getNumMonitors();
    int width = m_SSMain->getWidth();
    int height = m_SSMain->getHeight();
    for (int i = 0; i < numMonitors; i++)
    {
        glViewport(i*width/numMonitors, 0, width/numMonitors, height);
        glLoadIdentity();
        gluLookAt(0, 0, 12, 0, 0, 0, 0, 1, 0);
        glRotatef(m_elapsed/33.0f, 0, 1, 0);
        m_logoBox.draw();
    }
    SDL_GL_SwapBuffers();
}