mirror of
https://github.com/worldforge/ember
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279974934d
The currently released CEGUI version (0.8.7) doesn't support OGRE 1.11+, so we need to supply our own slightly altered renderer.
278 lines
8.7 KiB
C++
278 lines
8.7 KiB
C++
/***********************************************************************
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created: Tue Feb 17 2009
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author: Paul D Turner
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*************************************************************************/
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/***************************************************************************
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* Copyright (C) 2004 - 2013 Paul D Turner & The CEGUI Development Team
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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***************************************************************************/
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#include "RenderTarget.h"
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#include "CEGUI/GeometryBuffer.h"
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#include "CEGUI/RenderQueue.h"
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#include "GeometryBuffer.h"
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#include <OgreRenderSystem.h>
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#include <OgreCamera.h>
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#include <OgreViewport.h>
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// Start of CEGUI namespace section
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namespace CEGUI
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{
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//----------------------------------------------------------------------------//
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template <typename T>
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OgreRenderTarget<T>::OgreRenderTarget(OgreRenderer& owner,
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Ogre::RenderSystem& rs) :
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d_owner(owner),
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d_renderSystem(rs),
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d_area(0, 0, 0, 0),
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d_renderTarget(0),
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#ifdef CEGUI_USE_OGRE_COMPOSITOR2
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d_renderTargetUpdated(false),
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#else
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d_viewport(0),
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#endif
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d_matrix(Ogre::Matrix3::ZERO),
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d_matrixValid(false),
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d_viewDistance(0),
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d_viewportValid(false)
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#ifndef CEGUI_USE_OGRE_COMPOSITOR2
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, d_ogreViewportDimensions(0, 0, 0, 0)
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#endif
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{
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}
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//----------------------------------------------------------------------------//
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template <typename T>
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OgreRenderTarget<T>::~OgreRenderTarget()
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{
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#if !defined(CEGUI_USE_OGRE_COMPOSITOR2)
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delete d_viewport;
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#endif
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}
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//----------------------------------------------------------------------------//
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template <typename T>
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void OgreRenderTarget<T>::draw(const GeometryBuffer& buffer)
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{
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buffer.draw();
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}
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//----------------------------------------------------------------------------//
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template <typename T>
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void OgreRenderTarget<T>::draw(const RenderQueue& queue)
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{
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queue.draw();
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}
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//----------------------------------------------------------------------------//
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template <typename T>
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void OgreRenderTarget<T>::setArea(const Rectf& area)
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{
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d_area = area;
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#if !defined(CEGUI_USE_OGRE_COMPOSITOR2)
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setOgreViewportDimensions(area);
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#endif
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d_matrixValid = false;
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RenderTargetEventArgs args(this);
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T::fireEvent(RenderTarget::EventAreaChanged, args);
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}
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//----------------------------------------------------------------------------//
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#if !defined(CEGUI_USE_OGRE_COMPOSITOR2)
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template <typename T>
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void OgreRenderTarget<T>::setOgreViewportDimensions(const Rectf& area)
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{
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d_ogreViewportDimensions = area;
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if (d_viewport)
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updateOgreViewportDimensions(d_viewport->getTarget());
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d_viewportValid = false;
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}
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#endif
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//----------------------------------------------------------------------------//
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#if !defined(CEGUI_USE_OGRE_COMPOSITOR2)
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template <typename T>
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void OgreRenderTarget<T>::updateOgreViewportDimensions(
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const Ogre::RenderTarget* const rt)
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{
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if (rt)
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{
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d_viewport->setDimensions(
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d_ogreViewportDimensions.left() / rt->getWidth(),
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d_ogreViewportDimensions.top() / rt->getHeight(),
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d_ogreViewportDimensions.getWidth() / rt->getWidth(),
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d_ogreViewportDimensions.getHeight() / rt->getHeight());
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}
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}
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#endif
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//----------------------------------------------------------------------------//
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template <typename T>
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const Rectf& OgreRenderTarget<T>::getArea() const
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{
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return d_area;
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}
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//----------------------------------------------------------------------------//
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template <typename T>
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void OgreRenderTarget<T>::activate()
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{
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if (!d_matrixValid)
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updateMatrix();
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if (!d_viewportValid)
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updateViewport();
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#if !defined(CEGUI_USE_OGRE_COMPOSITOR2)
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d_renderSystem._setViewport(d_viewport);
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#endif
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d_owner.setProjectionMatrix(d_matrix);
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d_owner.setViewMatrix(Ogre::Matrix4::IDENTITY);
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d_owner.initialiseRenderStateSettings();
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}
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//----------------------------------------------------------------------------//
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template <typename T>
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void OgreRenderTarget<T>::deactivate()
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{
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// currently nothing to do in the basic case
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}
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//----------------------------------------------------------------------------//
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template <typename T>
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void OgreRenderTarget<T>::unprojectPoint(const GeometryBuffer& buff,
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const Vector2f& p_in,
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Vector2f& p_out) const
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{
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if (!d_matrixValid)
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updateMatrix();
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const OgreGeometryBuffer& gb = static_cast<const OgreGeometryBuffer&>(buff);
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const Ogre::Real midx = d_area.getWidth() * 0.5f;
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const Ogre::Real midy = d_area.getHeight() * 0.5f;
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// viewport matrix
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const Ogre::Matrix4 vpmat(
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midx, 0, 0, d_area.left() + midx,
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0, -midy, 0, d_area.top() + midy,
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0, 0, 1, 0,
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0, 0, 0, 1
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);
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// matrices used for projecting and unprojecting points
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const Ogre::Matrix4 proj(gb.getMatrix() * d_matrix * vpmat);
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const Ogre::Matrix4 unproj(proj.inverse());
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Ogre::Vector3 in;
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// unproject the ends of the ray
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in.x = midx;
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in.y = midy;
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in.z = -d_viewDistance;
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const Ogre::Vector3 r1(unproj * in);
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in.x = p_in.d_x;
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in.y = p_in.d_y;
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in.z = 0;
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// calculate vector of picking ray
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const Ogre::Vector3 rv(r1 - unproj * in);
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// project points to orientate them with GeometryBuffer plane
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in.x = 0.0;
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in.y = 0.0;
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const Ogre::Vector3 p1(proj * in);
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in.x = 1.0;
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in.y = 0.0;
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const Ogre::Vector3 p2(proj * in);
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in.x = 0.0;
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in.y = 1.0;
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const Ogre::Vector3 p3(proj * in);
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// calculate the plane normal
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const Ogre::Vector3 pn((p2 - p1).crossProduct(p3 - p1));
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// calculate distance from origin
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const Ogre::Real plen = pn.length();
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const Ogre::Real dist = -(p1.x * (pn.x / plen) +
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p1.y * (pn.y / plen) +
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p1.z * (pn.z / plen));
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// calculate intersection of ray and plane
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const Ogre::Real pn_dot_rv = pn.dotProduct(rv);
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const Ogre::Real tmp = pn_dot_rv != 0.0 ?
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(pn.dotProduct(r1) + dist) / pn_dot_rv :
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0.0;
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p_out.d_x = static_cast<float>(r1.x - rv.x * tmp);
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p_out.d_y = static_cast<float>(r1.y - rv.y * tmp);
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}
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//----------------------------------------------------------------------------//
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template <typename T>
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void OgreRenderTarget<T>::updateMatrix() const
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{
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const float w = d_area.getWidth();
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const float h = d_area.getHeight();
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const float aspect = w / h;
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const float midx = w * 0.5f;
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d_viewDistance = midx / (aspect * 0.267949192431123f);
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const float nearZ = d_viewDistance * 0.5f;
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const float farZ = d_viewDistance * 2.0f;
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const float nr_sub_far = nearZ - farZ;
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Ogre::Matrix4 tmp(Ogre::Matrix4::ZERO);
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tmp[0][0] = 3.732050808f / aspect;
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tmp[0][3] = -d_viewDistance;
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tmp[1][1] = -3.732050808f;
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tmp[1][3] = d_viewDistance;
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tmp[2][2] = -((farZ + nearZ) / nr_sub_far);
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tmp[3][2] = 1.0f;
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tmp[3][3] = d_viewDistance;
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d_renderSystem._convertProjectionMatrix(tmp, d_matrix);
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d_matrixValid = true;
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}
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//----------------------------------------------------------------------------//
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template <typename T>
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void OgreRenderTarget<T>::updateViewport()
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{
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#if !defined(CEGUI_USE_OGRE_COMPOSITOR2)
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if (!d_viewport)
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{
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d_viewport = OGRE_NEW Ogre::Viewport(0, d_renderTarget, 0, 0, 1, 1, 0);
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updateOgreViewportDimensions(d_renderTarget);
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}
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d_viewport->_updateDimensions();
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#endif
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d_viewportValid = true;
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}
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//----------------------------------------------------------------------------//
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} // End of CEGUI namespace section
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