engine/components/graphics/cameracontroller/cameracontrollercomponent.cpp

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/******************************************************************************
 * This file is part of the Gluon Development Platform
 * Copyright (c) 2010 Arjen Hiemstra <ahiemstra@heimr.nl>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */

#include "cameracontrollercomponent.h"

#include <core/debughelper.h>
#include <graphics/camera.h>
#include <graphics/engine.h>
#include <graphics/frustrum.h>
#include <graphics/viewport.h>
#include <engine/gameobject.h>

#include <QtCore/QSizeF>
#include <QtGui/QMatrix4x4>

REGISTER_OBJECTTYPE( GluonEngine, CameraControllerComponent )

using namespace GluonEngine;

class CameraControllerComponent::CameraControllerComponentPrivate
{
    public:
        CameraControllerComponentPrivate()
        {
            camera = 0;
            active = true;
            visibleArea = QSizeF( 100.0f, 100.0f );
            nearPlane = 1.0f;
            farPlane = 100.0f;
        }

        GluonGraphics::Camera* camera;
        bool active;

        QSizeF visibleArea;
        float nearPlane;
        float farPlane;

        static GluonGraphics::Camera* activeCamera;
};

GluonGraphics::Camera* CameraControllerComponent::CameraControllerComponentPrivate::activeCamera = 0;

CameraControllerComponent::CameraControllerComponent( QObject* parent )
    : Component( parent )
    , d( new CameraControllerComponentPrivate )
{

}

CameraControllerComponent::CameraControllerComponent( const CameraControllerComponent& other )
    : Component( other )
    , d( other.d )
{
}

CameraControllerComponent::~CameraControllerComponent()
{
    delete d;
}

QString CameraControllerComponent::category() const
{
    return QString( "Graphics" );
}

void CameraControllerComponent::initialize()
{
    if( !d->camera )
        d->camera = new GluonGraphics::Camera();

    if( d->active )
    {
        GluonGraphics::Engine::instance()->setActiveCamera( d->camera );
    }

    d->camera->frustrum()->setOrthoAdjusted( d->visibleArea, GluonGraphics::Engine::instance()->currentViewport()->aspectRatio(), d->nearPlane, d->farPlane );
}

void CameraControllerComponent::start()
{
}

void CameraControllerComponent::draw( int timeLapse )
{
    Q_UNUSED( timeLapse )

    if( d->camera )
        d->camera->setViewMatrix( gameObject()->transform().inverted() );
}

void CameraControllerComponent::cleanup()
{
    CameraControllerComponentPrivate::activeCamera = 0;
    GluonGraphics::Engine::instance()->setActiveCamera( 0 );

    delete d->camera;
    d->camera = 0;
}

bool CameraControllerComponent::isActive()
{
    return d->active;
}

void CameraControllerComponent::setActive( bool active )
{
    d->active = active;
    if( active && d->camera )
    {
        CameraControllerComponentPrivate::activeCamera = d->camera;
        GluonGraphics::Engine::instance()->setActiveCamera( d->camera );
    }
}

void CameraControllerComponent::setVisibleArea( const QSizeF& area )
{
    d->visibleArea = area;

    if( d->camera )
        d->camera->frustrum()->setOrthoAdjusted( d->visibleArea, GluonGraphics::Engine::instance()->currentViewport()->aspectRatio(), d->nearPlane, d->farPlane );
}

QSizeF CameraControllerComponent::visibleArea()
{
    return d->visibleArea;
}

float CameraControllerComponent::nearPlane()
{
    return d->nearPlane;
}

float CameraControllerComponent::farPlane()
{
    return d->farPlane;
}

void CameraControllerComponent::setNearPlane( float near )
{
    d->nearPlane = near;

    if( d->camera )
        d->camera->frustrum()->setOrthoAdjusted( d->visibleArea, GluonGraphics::Engine::instance()->currentViewport()->aspectRatio(), d->nearPlane, d->farPlane );
}

void CameraControllerComponent::setFarPlane( float far )
{
    d->farPlane = far;

    if( d->camera )
        d->camera->frustrum()->setOrthoAdjusted( d->visibleArea, GluonGraphics::Engine::instance()->currentViewport()->aspectRatio(), d->nearPlane, d->farPlane );
}

Q_EXPORT_PLUGIN2( gluon_component_cameracontroller, GluonEngine::CameraControllerComponent );

#include "cameracontrollercomponent.moc"

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