Camera.cpp

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// Copyright (C) 2005 Dave Griffiths
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

#include "Camera.h"

using namespace Fluxus;
    
Camera::Camera() :
m_Initialised(false),
m_Ortho(false),
m_CameraAttached(NULL),
m_CameraLag(0),
m_Up(-1),
m_Down(1),
m_Left(-0.75),
m_Right(0.75),
m_Front(1),
m_Back(10000),
m_OrthZoom(1.0f),
m_ViewX(0),
m_ViewY(0),
m_ViewWidth(1),
m_ViewHeight(1)
{
    // default camera position
    m_Transform.translate(0,0,-10);
}

Camera::~Camera()
{
}

void Camera::DoProjection()
{
    if (m_Ortho) glOrtho(m_Down*m_OrthZoom,m_Up*m_OrthZoom,m_Right*m_OrthZoom,m_Left*m_OrthZoom,m_Front,m_Back);
    else glFrustum(m_Up,m_Down,m_Left,m_Right,m_Front,m_Back);
}

void Camera::DoCamera()
{
    glMultMatrixf(m_Transform.arr());

    if (m_CameraAttached)
    {
        if (m_CameraLag!=0)
        {
            m_LockedMatrix.blend(m_CameraAttached->GetState()->Transform.inverse(),m_CameraLag);
        }
        else
        {
            m_LockedMatrix=m_CameraAttached->GetState()->Transform.inverse();
        }

        glMultMatrixf(m_LockedMatrix.arr());        
    }
}

void Camera::LockCamera(Primitive *p)
{
     m_CameraAttached=p;
}

dMatrix Camera::GetProjection()
{
    dMatrix Projection;
    glGetFloatv(GL_PROJECTION_MATRIX,Projection.arr());
    return Projection;
}

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