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SFML - Simple and Fast Multimedia Library

SFML v1.6

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View.cpp

//
// SFML - Simple and Fast Multimedia Library
// Copyright (C) 2007-2009 Laurent Gomila ([email protected])
//
// This software is provided 'as-is', without any express or implied warranty.
// In no event will the authors be held liable for any damages arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it freely,
// subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented;
//    you must not claim that you wrote the original software.
//    If you use this software in a product, an acknowledgment
//    in the product documentation would be appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such,
//    and must not be misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source distribution.
//

// Headers
#include <SFML/Graphics/View.hpp>
#include <algorithm>


namespace sf
{
View::View(const FloatRect& ViewRect)
{
    SetFromRect(ViewRect);
}


View::View(const sf::Vector2f& Center, const sf::Vector2f& HalfSize) :
myCenter    (Center),
myHalfSize  (HalfSize),
myNeedUpdate(true)
{

}


void View::SetCenter(float X, float Y)
{
    myCenter.x   = X;
    myCenter.y   = Y;
    myNeedUpdate = true;
}


void View::SetCenter(const sf::Vector2f& Center)
{
    SetCenter(Center.x, Center.y);
}


void View::SetHalfSize(float HalfWidth, float HalfHeight)
{
    myHalfSize.x = HalfWidth;
    myHalfSize.y = HalfHeight;
    myNeedUpdate = true;
}


void View::SetHalfSize(const sf::Vector2f& HalfSize)
{
    SetHalfSize(HalfSize.x, HalfSize.y);
}


void View::SetFromRect(const FloatRect& ViewRect)
{
    SetCenter(  (ViewRect.Right + ViewRect.Left) / 2, (ViewRect.Bottom + ViewRect.Top) / 2);
    SetHalfSize((ViewRect.Right - ViewRect.Left) / 2, (ViewRect.Bottom - ViewRect.Top) / 2);
}


const sf::Vector2f& View::GetCenter() const
{
    return myCenter;
}


const sf::Vector2f& View::GetHalfSize() const
{
    return myHalfSize;
}


const sf::FloatRect& View::GetRect() const
{
    // Recompute it if needed
    if (myNeedUpdate)
        const_cast<View*>(this)->RecomputeMatrix();

    return myRect;
}


void View::Move(float OffsetX, float OffsetY)
{
    myCenter.x  += OffsetX;
    myCenter.y  += OffsetY;
    myNeedUpdate = true;
}


void View::Move(const sf::Vector2f& Offset)
{
    Move(Offset.x, Offset.y);
}


void View::Zoom(float Factor)
{
    if (Factor != 0)
    {
        myHalfSize  /= Factor;
        myNeedUpdate = true;
    }
}


const Matrix3& View::GetMatrix() const
{
    // Recompute the matrix if needed
    if (myNeedUpdate)
        const_cast<View*>(this)->RecomputeMatrix();

    return myMatrix;
}


void View::RecomputeMatrix()
{
    // Compute the 4 corners of the view
    float Left   = myCenter.x - myHalfSize.x;
    float Top    = myCenter.y - myHalfSize.y;
    float Right  = myCenter.x + myHalfSize.x;
    float Bottom = myCenter.y + myHalfSize.y;

    // Update the view rectangle - be careful, reversed views are allowed !
    myRect.Left   = std::min(Left, Right);
    myRect.Top    = std::min(Top, Bottom);
    myRect.Right  = std::max(Left, Right);
    myRect.Bottom = std::max(Top, Bottom);

    // Update the projection matrix
    myMatrix(0, 0) = 2.f / (Right - Left);
    myMatrix(1, 1) = 2.f / (Top - Bottom);
    myMatrix(0, 2) = (Left + Right) / (Left - Right);
    myMatrix(1, 2) = (Bottom + Top) / (Bottom - Top);

    myNeedUpdate = false;
}

} // namespace sf

 ::  Copyright © 2007-2008 Laurent Gomila, all rights reserved  ::  Documentation generated by doxygen 1.5.2  :: 

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  • sf::VideoMode
  • sf::View
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  • sf::WindowListener
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• Class Hierarchy
  • sf::AudioResource
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  • sf::Clock
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    • sf::Sprite
    • sf::String
  • sf::Event
  • sf::Event::Event::JoyButtonEvent
  • sf::Event::Event::JoyMoveEvent
  • sf::Event::Event::KeyEvent
  • sf::Event::Event::MouseButtonEvent
  • sf::Event::Event::MouseMoveEvent
  • sf::Event::Event::MouseWheelEvent
  • sf::Event::Event::SizeEvent
  • sf::Event::Event::TextEvent
  • sf::Ftp::Ftp::Response
    • sf::Ftp::Ftp::DirectoryResponse
    • sf::Ftp::Ftp::ListingResponse
  • sf::Glyph
  • sf::Http::Http::Request
  • sf::Http::Http::Response
  • sf::IPAddress
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  • sf::Matrix3
  • sf::NonCopyable
    • sf::Context
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    • sf::Http
    • sf::Input
    • sf::Lock
    • sf::Mutex
    • sf::Thread
      • sf::SoundRecorder
        • sf::SoundBufferRecorder
      • sf::SoundStream
    • sf::Window
      • sf::RenderWindow
  • sf::Packet
  • sf::Randomizer
  • sf::Rect< T >
  • sf::RenderTarget
    • sf::RenderWindow
  • sf::Resource< T >
  • sf::Resource< Font >
    • sf::Font
  • sf::Resource< Image >
    • sf::Image
  • sf::Resource< SoundBuffer >
    • sf::SoundBuffer
  • sf::ResourcePtr< T >
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    • sf::Selector< Type >
  • sf::SocketHelper
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  • sf::Unicode::Unicode::Text
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• Class Members
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• Namespace Members
• File List
  • Arial.hpp
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  • AudioDevice.cpp
  • AudioDevice.hpp
  • AudioResource.cpp
  • AudioResource.hpp
  • Clock.cpp
  • Clock.hpp
  • Color.cpp
  • Color.hpp
  • Config.hpp
  • Context.cpp
  • Context.hpp
  • Doxygen.hpp
  • Drawable.cpp
  • Drawable.hpp
  • Event.hpp
  • Font.cpp
  • Font.hpp
  • FontLoader.cpp
  • FontLoader.hpp
  • Ftp.cpp
  • Ftp.hpp
  • Glyph.hpp
  • Graphics.hpp
  • GraphicsContext.cpp
  • GraphicsContext.hpp
  • Http.cpp
  • Http.hpp
  • Image.cpp
  • Image.hpp
  • ImageLoader.cpp
  • ImageLoader.hpp
  • Input.cpp
  • Input.hpp
  • IPAddress.cpp
  • IPAddress.hpp
  • Cocoa/Joystick.cpp
  • Template for new ports/Joystick.cpp
  • Win32/Joystick.cpp
  • Cocoa/Joystick.hpp
  • Joystick.hpp
  • Template for new ports/Joystick.hpp
  • Win32/Joystick.hpp
  • Listener.cpp
  • Listener.hpp
  • Lock.cpp
  • Lock.hpp
  • Matrix3.cpp
  • Matrix3.hpp
  • Matrix3.inl
  • Music.cpp
  • Music.hpp
  • Mutex.cpp
  • Mutex.hpp
  • Win32/Mutex.hpp
  • Network.hpp
  • NonCopyable.hpp
  • OpenAL.hpp
  • OpenGL.hpp
  • Packet.cpp
  • Packet.hpp
  • Platform.cpp
  • Platform.hpp
  • Win32/Platform.hpp
  • PostFX.cpp
  • PostFX.hpp
  • Randomizer.cpp
  • Randomizer.hpp
  • Rect.hpp
  • Rect.inl
  • RenderTarget.cpp
  • RenderTarget.hpp
  • RenderWindow.cpp
  • RenderWindow.hpp
  • Resource.hpp
  • Resource.inl
  • ResourcePtr.inl
  • Selector.hpp
  • Selector.inl
  • SelectorBase.cpp
  • SelectorBase.hpp
  • SFML_Main.cpp
  • Shape.cpp
  • Shape.hpp
  • Sleep.cpp
  • Sleep.hpp
  • SocketHelper.cpp
  • SocketHelper.hpp
  • Win32/SocketHelper.hpp
  • Sockets.hpp
  • SocketTCP.cpp
  • SocketTCP.hpp
  • SocketUDP.cpp
  • SocketUDP.hpp
  • Sound.cpp
  • Sound.hpp
  • SoundBuffer.cpp
  • SoundBuffer.hpp
  • SoundBufferRecorder.cpp
  • SoundBufferRecorder.hpp
  • SoundFile.cpp
  • SoundFile.hpp
  • SoundFileDefault.cpp
  • SoundFileDefault.hpp
  • SoundFileOgg.cpp
  • SoundFileOgg.hpp
  • SoundRecorder.cpp
  • SoundRecorder.hpp
  • SoundStream.cpp
  • SoundStream.hpp
  • Sprite.cpp
  • Sprite.hpp
  • String.cpp
  • String.hpp
  • System.hpp
  • Thread.cpp
  • Thread.hpp
  • Win32/Thread.hpp
  • Unicode.cpp
  • Unicode.hpp
  • Unicode.inl
  • Vector2.hpp
  • Vector2.inl
  • Vector3.hpp
  • Vector3.inl
  • VideoMode.cpp
  • VideoMode.hpp
  • Cocoa/VideoModeSupport.cpp
  • Template for new ports/VideoModeSupport.cpp
  • Win32/VideoModeSupport.cpp
  • Cocoa/VideoModeSupport.hpp
  • Template for new ports/VideoModeSupport.hpp
  • VideoModeSupport.hpp
  • Win32/VideoModeSupport.hpp
  • View.cpp
  • View.hpp
  • Window.cpp
  • Window/Window.hpp
  • Window.hpp
  • WindowHandle.hpp
  • WindowImpl.cpp
  • WindowImpl.hpp
  • WindowImplCocoa.hpp
  • WindowImplWin32.cpp
  • WindowImplWin32.hpp
  • WindowImplXXX.cpp
  • WindowImplXXX.hpp
  • WindowListener.hpp
  • WindowSettings.hpp
  • WindowStyle.hpp

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