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-/****************************************************************************
-**
-** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
-** All rights reserved.
-** Contact: Nokia Corporation ([email protected])
-**
-** This file is part of the QtQuick3D module of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:LGPL$
-** GNU Lesser General Public License Usage
-** This file may be used under the terms of the GNU Lesser General Public
-** License version 2.1 as published by the Free Software Foundation and
-** appearing in the file LICENSE.LGPL included in the packaging of this
-** file. Please review the following information to ensure the GNU Lesser
-** General Public License version 2.1 requirements will be met:
-** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
-**
-** In addition, as a special exception, Nokia gives you certain additional
-** rights. These rights are described in the Nokia Qt LGPL Exception
-** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
-**
-** GNU General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU General
-** Public License version 3.0 as published by the Free Software Foundation
-** and appearing in the file LICENSE.GPL included in the packaging of this
-** file. Please review the following information to ensure the GNU General
-** Public License version 3.0 requirements will be met:
-** http://www.gnu.org/copyleft/gpl.html.
-**
-** Other Usage
-** Alternatively, this file may be used in accordance with the terms and
-** conditions contained in a signed written agreement between you and Nokia.
-**
-**
-**
-**
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#ifndef PAGEFLIPMATH_P_H
-#define PAGEFLIPMATH_P_H
-
-#include <QtOpenGL/qgl.h>
-
-QT_BEGIN_NAMESPACE
-
-class PageFlipMath
-{
-public:
- PageFlipMath();
- ~PageFlipMath();
-
- enum StartCorner
- {
- BottomRight,
- TopRight,
- BottomLeft,
- TopLeft,
- BottomLeftOnePage,
- TopLeftOnePage,
- VerticalBottomRight,
- VerticalTopRight,
- VerticalBottomLeft,
- VerticalTopLeft
- };
-
- // Corner to start flipping from.
- StartCorner startCorner() const { return m_startCorner; }
- void setStartCorner(StartCorner value) { m_startCorner = value; }
-
- // Rectangle to display the main page (usually the one on the right).
- QRect pageRect() const { return m_pageRect; }
- void setPageRect(const QRect& rect) { m_pageRect = rect; }
-
- // Show the reverse of the right-hand page on the back when
- // flipping pages. That is, the user will essentially see
- // the texture on the front of the page "through" it in reverse
- // while it is being flipped.
- bool showPageReverse() const { return m_showPageReverse; }
- void setShowPageReverse(bool value) { m_showPageReverse = value; }
-
- // Get the vertex array pointer.
- const GLfloat *vertexArray() const { return vertices[0][0]; }
-
- // Get the vertex array stride in bytes.
- int stride() const { return 5 * sizeof(GLfloat); }
-
- // Draw a specific page.
- void drawPage(int page) const;
-
- // Draw the outline of a page as a set of lines.
- void drawOutline(int page) const;
-
- // Compute the frame at position t (0...1) in the animation.
- void compute(qreal t);
-
-private:
- StartCorner m_startCorner;
- QRect m_pageRect;
- bool m_showPageReverse;
-
- // Vertex array: up to 4 pages, with up to 5 vertices per page,
- // and 5 components (2D position, 2D texcoord, 1D gradient control)
- // per vertex. The gradient control value is interpolated between
- // 0 and 1 - it is 1 at the fold point and 0 on the side of the page
- // opposite the fold point. Shaders can use this to extract a color
- // value from a gradient texture to blend with the page texture.
- GLfloat vertices[4][5][5];
-
- // Number of vertices for drawing the triangle fan for each page.
- int pageCount[4];
-
- void flip(qreal pageWidth, qreal pageHeight, qreal t);
-};
-
-QT_END_NAMESPACE
-
-#endif