/usr/include/cegui-0.8.7/CEGUI/RendererModules/Irrlicht/RenderTarget.inl is in libcegui-mk2-dev 0.8.7-1.3+b2.
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created: Tue Mar 3 2009
author: Paul D Turner (parts based on original code by Thomas Suter)
*************************************************************************/
/***************************************************************************
* Copyright (C) 2004 - 2011 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/Irrlicht/RenderTarget.h"
#include "CEGUI/GeometryBuffer.h"
#include "CEGUI/RenderQueue.h"
#include "CEGUI/RendererModules/Irrlicht/GeometryBuffer.h"
// Start of CEGUI namespace section
namespace CEGUI
{
//----------------------------------------------------------------------------//
template <typename T>
IrrlichtRenderTarget<T>::IrrlichtRenderTarget(IrrlichtRenderer& owner,
irr::video::IVideoDriver& driver) :
d_owner(owner),
d_driver(driver),
d_area(0, 0, 0, 0),
d_matrixValid(false),
d_viewDistance(0),
#if IRRLICHT_VERSION_MAJOR > 1 || (IRRLICHT_VERSION_MAJOR == 1 && IRRLICHT_VERSION_MINOR >= 8)
d_xViewDir(1.0f)
#else
d_xViewDir(driver.getDriverType() != irr::video::EDT_OPENGL ? 1.0f : -1.0f)
#endif
{
}
//----------------------------------------------------------------------------//
template <typename T>
IrrlichtRenderTarget<T>::~IrrlichtRenderTarget()
{
}
//----------------------------------------------------------------------------//
template <typename T>
void IrrlichtRenderTarget<T>::draw(const GeometryBuffer& buffer)
{
buffer.draw();
}
//----------------------------------------------------------------------------//
template <typename T>
void IrrlichtRenderTarget<T>::draw(const RenderQueue& queue)
{
queue.draw();
}
//----------------------------------------------------------------------------//
template <typename T>
void IrrlichtRenderTarget<T>::setArea(const Rectf& area)
{
d_area = area;
d_matrixValid = false;
RenderTargetEventArgs args(this);
T::fireEvent(RenderTarget::EventAreaChanged, args);
}
//----------------------------------------------------------------------------//
template <typename T>
const Rectf& IrrlichtRenderTarget<T>::getArea() const
{
return d_area;
}
//----------------------------------------------------------------------------//
template <typename T>
void IrrlichtRenderTarget<T>::activate()
{
irr::core::rect<irr::s32> vp(static_cast<irr::s32>(d_area.left()),
static_cast<irr::s32>(d_area.top()),
static_cast<irr::s32>(d_area.right()),
static_cast<irr::s32>(d_area.bottom()));
d_driver.setViewPort(vp);
if (!d_matrixValid)
updateMatrix();
d_driver.setTransform(irr::video::ETS_PROJECTION, d_matrix);
d_driver.setTransform(irr::video::ETS_VIEW, irr::core::matrix4());
}
//----------------------------------------------------------------------------//
template <typename T>
void IrrlichtRenderTarget<T>::deactivate()
{
}
//----------------------------------------------------------------------------//
template <typename T>
void IrrlichtRenderTarget<T>::unprojectPoint(const GeometryBuffer& buff,
const Vector2f& p_in,
Vector2f& p_out) const
{
if (!d_matrixValid)
updateMatrix();
const IrrlichtGeometryBuffer& gb =
static_cast<const IrrlichtGeometryBuffer&>(buff);
const irr::f32 midx = d_area.getWidth() * 0.5f;
const irr::f32 midy = d_area.getHeight() * 0.5f;
// viewport matrix
const irr::f32 vpmat_[] =
{
midx, 0, 0, 0,
0, -midy, 0, 0,
0, 0, 1, 0,
d_area.left() + midx, d_area.top() + midy, 0, 1
};
irr::core::matrix4 vpmat;
vpmat.setM(vpmat_);
// matrices used for projecting and unprojecting points
const irr::core::matrix4 proj(gb.getMatrix() * d_matrix * vpmat);
irr::core::matrix4 unproj(proj);
unproj.makeInverse();
irr::core::vector3df in;
// unproject the ends of the ray
in.X = midx;
in.Y = midy;
in.Z = -d_viewDistance;
irr::core::vector3df r1;
unproj.transformVect(r1, in);
in.X = p_in.d_x;
in.Y = p_in.d_y;
in.Z = 0;
irr::core::vector3df r2;
unproj.transformVect(r2, in);
// calculate vector of picking ray
const irr::core::vector3df rv(r1 - r2);
// project points to orientate them with GeometryBuffer plane
in.X = 0.0;
in.Y = 0.0;
irr::core::vector3df p1;
proj.transformVect(p1, in);
in.X = 1.0;
in.Y = 0.0;
irr::core::vector3df p2;
proj.transformVect(p2, in);
in.X = 0.0;
in.Y = 1.0;
irr::core::vector3df p3;
proj.transformVect(p3, in);
// calculate the plane normal
const irr::core::vector3df pn((p2 - p1).crossProduct(p3 - p1));
// calculate distance from origin
const irr::f32 plen = pn.getLength();
const irr::f32 dist = -(p1.X * (pn.X / plen) +
p1.Y * (pn.Y / plen) +
p1.Z * (pn.Z / plen));
// calculate intersection of ray and plane
const irr::f32 pn_dot_rv = pn.dotProduct(rv);
const irr::f32 tmp = pn_dot_rv != 0.0 ?
(pn.dotProduct(r1) + dist) / pn_dot_rv :
0.0f;
p_out.d_x = static_cast<float>(r1.X - rv.X * tmp) * d_viewDistance;
p_out.d_y = static_cast<float>(r1.Y - rv.Y * tmp) * d_viewDistance;
}
//----------------------------------------------------------------------------//
template <typename T>
void IrrlichtRenderTarget<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;
const float midy = h * 0.5f;
d_viewDistance = midx / (aspect * 0.267949192431123f);
d_matrix.buildProjectionMatrixPerspectiveFovRH(0.523598776f, aspect,
d_viewDistance * 0.5f,
d_viewDistance * 2.0f);
irr::core::matrix4 tmp;
tmp.buildCameraLookAtMatrixRH(
irr::core::vector3df(d_xViewDir * midx, midy, -d_viewDistance),
irr::core::vector3df(d_xViewDir * midx, midy, 1),
irr::core::vector3df(0, -1, 0));
d_matrix *= tmp;
d_matrixValid = true;
}
//----------------------------------------------------------------------------//
} // End of CEGUI namespace section
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