/usr/include/cegui-0.8.4/CEGUI/RendererModules/Ogre/RenderTarget.inl is in libcegui-mk2-dev 0.8.4+dfsg-4ubuntu1.
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created: Tue Feb 17 2009
author: Paul D Turner
*************************************************************************/
/***************************************************************************
* Copyright (C) 2004 - 2013 Paul D Turner & The CEGUI Development Team
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
***************************************************************************/
#include "CEGUI/RendererModules/Ogre/RenderTarget.h"
#include "CEGUI/GeometryBuffer.h"
#include "CEGUI/RenderQueue.h"
#include "CEGUI/RendererModules/Ogre/GeometryBuffer.h"
#include <OgreRenderSystem.h>
#include <OgreCamera.h>
#include <OgreViewport.h>
// Start of CEGUI namespace section
namespace CEGUI
{
//----------------------------------------------------------------------------//
template <typename T>
OgreRenderTarget<T>::OgreRenderTarget(OgreRenderer& owner,
Ogre::RenderSystem& rs) :
d_owner(owner),
d_renderSystem(rs),
d_area(0, 0, 0, 0),
d_renderTarget(0),
d_viewport(0),
d_matrix(Ogre::Matrix3::ZERO),
d_matrixValid(false),
d_viewportValid(false),
d_viewDistance(0),
d_ogreViewportDimensions(0, 0, 0, 0)
{
}
//----------------------------------------------------------------------------//
template <typename T>
OgreRenderTarget<T>::~OgreRenderTarget()
{
delete d_viewport;
}
//----------------------------------------------------------------------------//
template <typename T>
void OgreRenderTarget<T>::draw(const GeometryBuffer& buffer)
{
buffer.draw();
}
//----------------------------------------------------------------------------//
template <typename T>
void OgreRenderTarget<T>::draw(const RenderQueue& queue)
{
queue.draw();
}
//----------------------------------------------------------------------------//
template <typename T>
void OgreRenderTarget<T>::setArea(const Rectf& area)
{
d_area = area;
setOgreViewportDimensions(area);
d_matrixValid = false;
RenderTargetEventArgs args(this);
T::fireEvent(RenderTarget::EventAreaChanged, args);
}
//----------------------------------------------------------------------------//
template <typename T>
void OgreRenderTarget<T>::setOgreViewportDimensions(const Rectf& area)
{
d_ogreViewportDimensions = area;
if (d_viewport)
updateOgreViewportDimensions(d_viewport->getTarget());
d_viewportValid = false;
}
//----------------------------------------------------------------------------//
template <typename T>
void OgreRenderTarget<T>::updateOgreViewportDimensions(
const Ogre::RenderTarget* const rt)
{
if (rt)
{
d_viewport->setDimensions(
d_ogreViewportDimensions.left() / rt->getWidth(),
d_ogreViewportDimensions.top() / rt->getHeight(),
d_ogreViewportDimensions.getWidth() / rt->getWidth(),
d_ogreViewportDimensions.getHeight() / rt->getHeight());
}
}
//----------------------------------------------------------------------------//
template <typename T>
const Rectf& OgreRenderTarget<T>::getArea() const
{
return d_area;
}
//----------------------------------------------------------------------------//
template <typename T>
void OgreRenderTarget<T>::activate()
{
if (!d_matrixValid)
updateMatrix();
if (!d_viewportValid)
updateViewport();
d_renderSystem._setViewport(d_viewport);
d_owner.setProjectionMatrix(d_matrix);
d_owner.setViewMatrix(Ogre::Matrix4::IDENTITY);
}
//----------------------------------------------------------------------------//
template <typename T>
void OgreRenderTarget<T>::deactivate()
{
// currently nothing to do in the basic case
}
//----------------------------------------------------------------------------//
template <typename T>
void OgreRenderTarget<T>::unprojectPoint(const GeometryBuffer& buff,
const Vector2f& p_in,
Vector2f& p_out) const
{
if (!d_matrixValid)
updateMatrix();
const OgreGeometryBuffer& gb = static_cast<const OgreGeometryBuffer&>(buff);
const Ogre::Real midx = d_area.getWidth() * 0.5f;
const Ogre::Real midy = d_area.getHeight() * 0.5f;
// viewport matrix
const Ogre::Matrix4 vpmat(
midx, 0, 0, d_area.left() + midx,
0, -midy, 0, d_area.top() + midy,
0, 0, 1, 0,
0, 0, 0, 1
);
// matrices used for projecting and unprojecting points
const Ogre::Matrix4 proj(gb.getMatrix() * d_matrix * vpmat);
const Ogre::Matrix4 unproj(proj.inverse());
Ogre::Vector3 in;
// unproject the ends of the ray
in.x = midx;
in.y = midy;
in.z = -d_viewDistance;
const Ogre::Vector3 r1(unproj * in);
in.x = p_in.d_x;
in.y = p_in.d_y;
in.z = 0;
// calculate vector of picking ray
const Ogre::Vector3 rv(r1 - unproj * in);
// project points to orientate them with GeometryBuffer plane
in.x = 0.0;
in.y = 0.0;
const Ogre::Vector3 p1(proj * in);
in.x = 1.0;
in.y = 0.0;
const Ogre::Vector3 p2(proj * in);
in.x = 0.0;
in.y = 1.0;
const Ogre::Vector3 p3(proj * in);
// calculate the plane normal
const Ogre::Vector3 pn((p2 - p1).crossProduct(p3 - p1));
// calculate distance from origin
const Ogre::Real plen = pn.length();
const Ogre::Real dist = -(p1.x * (pn.x / plen) +
p1.y * (pn.y / plen) +
p1.z * (pn.z / plen));
// calculate intersection of ray and plane
const Ogre::Real pn_dot_rv = pn.dotProduct(rv);
const Ogre::Real tmp = pn_dot_rv != 0.0 ?
(pn.dotProduct(r1) + dist) / pn_dot_rv :
0.0;
p_out.d_x = static_cast<float>(r1.x - rv.x * tmp);
p_out.d_y = static_cast<float>(r1.y - rv.y * tmp);
}
//----------------------------------------------------------------------------//
template <typename T>
void OgreRenderTarget<T>::updateMatrix() const
{
const float w = d_area.getWidth();
const float h = d_area.getHeight();
const float aspect = w / h;
const float midx = w * 0.5f;
d_viewDistance = midx / (aspect * 0.267949192431123f);
const float nearZ = d_viewDistance * 0.5f;
const float farZ = d_viewDistance * 2.0f;
const float nr_sub_far = nearZ - farZ;
Ogre::Matrix4 tmp(Ogre::Matrix4::ZERO);
tmp[0][0] = 3.732050808f / aspect;
tmp[0][3] = -d_viewDistance;
tmp[1][1] = -3.732050808f;
tmp[1][3] = d_viewDistance;
tmp[2][2] = -((farZ + nearZ) / nr_sub_far);
tmp[3][2] = 1.0f;
tmp[3][3] = d_viewDistance;
d_renderSystem._convertProjectionMatrix(tmp, d_matrix);
d_matrixValid = true;
}
//----------------------------------------------------------------------------//
template <typename T>
void OgreRenderTarget<T>::updateViewport()
{
if (!d_viewport)
{
d_viewport = OGRE_NEW Ogre::Viewport(0, d_renderTarget, 0, 0, 1, 1, 0);
updateOgreViewportDimensions(d_renderTarget);
}
d_viewport->_updateDimensions();
d_viewportValid = true;
}
//----------------------------------------------------------------------------//
} // End of CEGUI namespace section
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