#include "screen/ScreenBox.h"

using namespace projection;

/**
 * Constructor.
 *
 * @param pScreen Screen data.
 */
ScreenBox::ScreenBox(Screen* pScreen) : ScreenShape(pScreen)
{
    m_width = 2.0;
    m_height = 2.0;
    m_depth = 2.0;
    m_horResolution = 4;
    m_vertResolution = 4;
    m_depthResolution = 4;
}

/**
 * Destructor.
 */
ScreenBox::~ScreenBox()
{
}

/**
 * Set width of the box screen.
 *
 * @param width Width of the box screen.
 */
void ScreenBox::setWidth(double width)
{
    if (m_width != width)
    {
        m_width = width;
	    notifyRedraw();
    }
}

/**
 * Set height of the box screen.
 *
 * @param height Height of the box screen.
 */
void ScreenBox::setHeight(double height)
{
    if (m_height != height)
    {
        m_height = height;
	    notifyRedraw();
    }
}

/**
 * Set depth of the box screen.
 *
 * @param depth Depth of the box screen.
 */
void ScreenBox::setDepth(double depth)
{
    if (m_depth != depth)
    {
        m_depth = depth;
	    notifyRedraw();
    }
}

/**
 * Set horizontal resolution of the box screen.
 *
 * @param resolution Horizontal resolution of the box screen.
 */
void ScreenBox::setHorResolution(unsigned int resolution)
{
    m_horResolution = resolution;
	notifyRedraw();
}

/**
 * Set vertical resolution of the box screen.
 *
 * @param resolution Vertical resolution of the box screen.
 */
void ScreenBox::setVertResolution(unsigned int resolution)
{
    m_vertResolution = resolution;
	notifyRedraw();
}

/**
 * Set depth resolution of the box screen.
 *
 * @param resolution Depth resolution of the box screen.
 */
void ScreenBox::setDepthResolution(unsigned int resolution)
{
    m_depthResolution = resolution;
	notifyRedraw();
}

/**
 * Retrieve bounding box of the screen shape.
 *
 * @param min One corner of the screen shape.
 * @param max Another corner of the screen shape.
 */
void ScreenBox::getBoundingBox(gmtl::Vec3f& min, gmtl::Vec3f& max)
{
	min.set((float)-m_width/2.0f, (float)-m_depth/2.0f, (float)-m_height/2.0f);
	max.set((float)m_width/2.0f, (float)m_depth/2.0f, (float)m_height/2.0f);
}

/**
 * Restore the screen shape from XML data.
 *
 * @param element Parent XML element of the screen shape data.
 */
bool ScreenBox::initFromDOMElement(const QDomElement& element)
{
    // don't notify redrawing by each restoring step
	if (!element.isNull())
	{
		m_width = element.attribute("width").toFloat();
		m_height = element.attribute("height").toFloat();
		m_depth = element.attribute("depth").toFloat();
		m_horResolution = element.attribute("horResolution").toInt();
		m_vertResolution = element.attribute("vertResolution").toInt();
		m_depthResolution = element.attribute("depthResolution").toInt();
        // if change
        notifyRedraw();
	}

	return true;	// todo: secure this function and return false on any critical error
}

/**
 * Store the current screen shape as XML data.
 *
 * @param name XML node name of the data.
 * @param doc XML document to store the data.
 * @return Current screen shape data as XML data.
 */
QDomElement ScreenBox::domElement(const QString& name, QDomDocument& doc) const
{
	QDomElement de = doc.createElement(name);
	de.setAttribute("name", getName());
	de.setAttribute("width", m_width);
	de.setAttribute("height", m_height);
	de.setAttribute("depth", m_depth);
	de.setAttribute("horResolution", m_horResolution);
	de.setAttribute("vertResolution", m_vertResolution);
	de.setAttribute("depthResolution", m_depthResolution);

	return de;
}

/**
 * Draw the shape model in inherited class.
 *
 * @param bFrame True to draw a wire frame mesh. False to draw as a polygon model.
 */
void ScreenBox::drawShape(bool)
{
	glPushAttrib(GL_ENABLE_BIT);
	glEnable(GL_CULL_FACE);

	double horDelta = m_width / m_horResolution;
    double vertDelta = m_height / m_vertResolution;
    double depthDelta = m_depth / m_depthResolution;
	unsigned int horCount;
	unsigned int vertCount;
	unsigned int depthCount;

    for (vertCount=0; vertCount<m_vertResolution; ++vertCount)
    {
        glBegin(GL_QUAD_STRIP);
        for (horCount=0; horCount<=m_horResolution; ++horCount)
        {
            glNormal3d(0, 1, 0);
            glVertex3d(-m_width/2.0 + horDelta*horCount,
					   -m_depth/2.0,
                       -m_height/2.0 + vertDelta*vertCount);
            glNormal3d(0, 1, 0);
            glVertex3d(-m_width/2.0 + horDelta*(horCount),
					   -m_depth/2.0,
                       -m_height/2.0 + vertDelta*(vertCount+1));
        }
        glEnd();
    }
    for (vertCount=0; vertCount<m_vertResolution; ++vertCount)
    {
        glBegin(GL_QUAD_STRIP);
        for (horCount=0; horCount<=m_horResolution; ++horCount)
        {
            glNormal3d(0, -1, 0);
            glVertex3d(m_width/2.0 - horDelta*horCount,
					   m_depth/2.0,
                       -m_height/2.0 + vertDelta*vertCount);
            glNormal3d(0, -1, 0);
            glVertex3d(m_width/2.0 - horDelta*(horCount),
					   m_depth/2.0,
                       -m_height/2.0 + vertDelta*(vertCount+1));
        }
        glEnd();
    }
    for (vertCount=0; vertCount<m_vertResolution; ++vertCount)
    {
        glBegin(GL_QUAD_STRIP);
        for (depthCount=0; depthCount<=m_depthResolution; ++depthCount)
        {
            glNormal3d(1, 0, 0);
            glVertex3d(-m_width/2.0,
					   m_depth/2.0 - depthDelta*depthCount,
                       -m_height/2.0 + vertDelta*vertCount);
            glNormal3d(1, 0, 0);
            glVertex3d(-m_width/2.0,
					   m_depth/2.0 - depthDelta*(depthCount),
                       -m_height/2.0 + vertDelta*(vertCount+1));
        }
        glEnd();
    }
    for (vertCount=0; vertCount<m_vertResolution; ++vertCount)
    {
        glBegin(GL_QUAD_STRIP);
        for (depthCount=0; depthCount<=m_depthResolution; ++depthCount)
        {
            glNormal3d(-1, 0, 0);
            glVertex3d(m_width/2.0,
					   -m_depth/2.0 + depthDelta*depthCount,
                       -m_height/2.0 + vertDelta*vertCount);
            glNormal3d(-1, 0, 0);
            glVertex3d(m_width/2.0,
					   -m_depth/2.0 + depthDelta*(depthCount),
                       -m_height/2.0 + vertDelta*(vertCount+1));
        }
        glEnd();
    }
    for (depthCount=0; depthCount<m_depthResolution; ++depthCount)
    {
        glBegin(GL_QUAD_STRIP);
        for (horCount=0; horCount<=m_horResolution; ++horCount)
        {
            glNormal3d(0, 0, 1);
            glVertex3d(m_width/2.0 - horDelta*horCount,
					   -m_depth/2.0 + depthDelta*depthCount,
                       -m_height/2.0);
            glNormal3d(0, 0, 1);
            glVertex3d(m_width/2.0 - horDelta*horCount,
					   -m_depth/2.0 + depthDelta*(depthCount+1),
                       -m_height/2.0);
        }
        glEnd();
    }
    for (depthCount=0; depthCount<m_depthResolution; ++depthCount)
    {
        glBegin(GL_QUAD_STRIP);
        for (horCount=0; horCount<=m_horResolution; ++horCount)
        {
            glNormal3d(0, 0, -1);
            glVertex3d(-m_width/2.0 + horDelta*horCount,
					   -m_depth/2.0 + depthDelta*depthCount,
                       m_height/2.0);
            glNormal3d(0, 0, -1);
            glVertex3d(-m_width/2.0 + horDelta*horCount,
					   -m_depth/2.0 + depthDelta*(depthCount+1),
                       m_height/2.0);
        }
        glEnd();
    }

	glPopAttrib();
}