241 lines
8.2 KiB
C++
241 lines
8.2 KiB
C++
// Copyright (C) 2008 Tim Moore
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License as
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// published by the Free Software Foundation; either version 2 of the
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// License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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#ifndef CAMERAGROUP_HXX
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#define CAMERAGROUP_HXX 1
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#include <map>
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#include <string>
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#include <vector>
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#include <memory>
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#include <osg/Matrix>
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#include <osg/ref_ptr>
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#include <osg/Referenced>
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#include <osg/Node>
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#include <osg/TextureRectangle>
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#include <osg/Texture2D>
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#include <osg/TexGen>
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#include <osgUtil/RenderBin>
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#include <simgear/scene/viewer/Compositor.hxx>
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namespace osg
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{
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class Camera;
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}
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namespace osgViewer
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{
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class Viewer;
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}
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class SGPropertyNode;
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namespace flightgear
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{
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class CameraGroupListener;
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class GraphicsWindow;
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/** A wrapper around osg::Camera that contains some extra information.
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*/
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struct CameraInfo : public osg::Referenced
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{
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/** properties of a camera.
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*/
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enum Flags
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{
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VIEW_ABSOLUTE = 0x1, /**< The camera view is absolute, not
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relative to the master camera. */
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PROJECTION_ABSOLUTE = 0x2, /**< The projection is absolute. */
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ORTHO = 0x4, /**< The projection is orthographic */
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GUI = 0x8, /**< Camera draws the GUI. */
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DO_INTERSECTION_TEST = 0x10,/**< scene intersection tests this
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camera. */
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FIXED_NEAR_FAR = 0x20, /**< take the near far values in the
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projection for real. */
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ENABLE_MASTER_ZOOM = 0x40 /**< Can apply the zoom algorithm. */
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};
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CameraInfo(unsigned flags_) :
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flags(flags_),
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physicalWidth(0), physicalHeight(0), bezelHeightTop(0),
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bezelHeightBottom(0), bezelWidthLeft(0), bezelWidthRight(0),
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relativeCameraParent(0) { }
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/** The name as given in the config file.
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*/
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std::string name;
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/** Properties of the camera. @see CameraGroup::Flags.
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*/
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unsigned flags;
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/** Physical size parameters.
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*/
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double physicalWidth;
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double physicalHeight;
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double bezelHeightTop;
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double bezelHeightBottom;
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double bezelWidthLeft;
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double bezelWidthRight;
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/** Non-owning reference to the parent camera for relative camera
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* configurations.
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*/
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const CameraInfo *relativeCameraParent;
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/** The reference points in the parents projection space.
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*/
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osg::Vec2d parentReference[2];
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/** The reference points in the current projection space.
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*/
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osg::Vec2d thisReference[2];
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/** View offset from the viewer master camera.
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*/
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osg::Matrix viewOffset;
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/** Projection offset from the viewer master camera.
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*/
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osg::Matrix projOffset;
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/** Current view and projection matrices for this camera.
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* They are only used by other child cameras through relativeCameraParent
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* so they can avoid recalculating them.
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*/
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osg::Matrix viewMatrix, projMatrix;
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/** The Compositor used to manage the pipeline of this camera.
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*/
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osg::ref_ptr<simgear::compositor::Compositor> compositor;
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};
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class CameraGroup : public osg::Referenced
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{
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public:
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/** Create a camera group associated with an osgViewer::Viewer.
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* @param viewer the viewer
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*/
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CameraGroup(osgViewer::Viewer* viewer);
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virtual ~CameraGroup();
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/** Set the default CameraGroup, which is the only one that
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* matters at this time.
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* @param group the group to set.
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*/
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static void buildDefaultGroup(osgViewer::Viewer* viewer);
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static void setDefault(CameraGroup* group) { _defaultGroup = group; }
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/** Get the default CameraGroup.
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* @return the default camera group.
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*/
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static CameraGroup* getDefault() { return _defaultGroup.get(); }
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/** Get the camera group's Viewer.
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* @return the viewer
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*/
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osgViewer::Viewer* getViewer() { return _viewer.get(); }
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/** Create an osg::Camera from a property node and add it to the
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* camera group.
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* @param cameraNode the property node.
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* @return a CameraInfo object for the camera.
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*/
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void buildCamera(SGPropertyNode* cameraNode);
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/** Create a camera from properties that will draw the GUI and add
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* it to the camera group.
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* @param cameraNode the property node. This can be 0, in which
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* case a default GUI camera is created.
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* @param window the GraphicsWindow to use for the GUI camera. If
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* this is 0, the window is determined from the property node.
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* @return a CameraInfo object for the GUI camera.
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*/
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void buildGUICamera(SGPropertyNode* cameraNode,
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GraphicsWindow* window = 0);
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/** Update the view for the camera group.
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* @param position the world position of the view
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* @param orientation the world orientation of the view.
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*/
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void update(const osg::Vec3d& position,
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const osg::Quat& orientation);
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/** Set the parameters of the viewer's master camera. This won't
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* affect cameras that have CameraFlags::PROJECTION_ABSOLUTE set.
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* XXX Should znear and zfar be settable?
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* @param vfov the vertical field of view angle
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* @param aspectRatio the master camera's aspect ratio. This
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* doesn't actually change the viewport, but should reflect the
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* current viewport.
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*/
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void setCameraParameters(float vfov, float aspectRatio);
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/** Update camera properties after a resize event.
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*/
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void resized();
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void buildDistortionCamera(const SGPropertyNode* psNode,
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osg::Camera* camera);
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/**
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* get aspect ratio of master camera's viewport
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*/
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double getMasterAspectRatio() const;
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CameraInfo *getGUICamera() const;
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protected:
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friend CameraGroupListener;
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friend bool computeIntersections(const CameraGroup* cgroup,
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const osg::Vec2d& windowPos,
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osgUtil::LineSegmentIntersector::Intersections&
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intersections);
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typedef std::vector<osg::ref_ptr<CameraInfo>> CameraList;
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CameraList _cameras;
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osg::ref_ptr<osgViewer::Viewer> _viewer;
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static osg::ref_ptr<CameraGroup> _defaultGroup;
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std::unique_ptr<CameraGroupListener> _listener;
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// Near, far for the master camera if used.
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float _zNear;
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float _zFar;
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float _nearField;
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/** Build a complete CameraGroup from a property node.
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* @param viewer the viewer associated with this camera group.
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* @param wbuilder the window builder to be used for this camera group.
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* @param the camera group property node.
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*/
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static CameraGroup* buildCameraGroup(osgViewer::Viewer* viewer,
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SGPropertyNode* node);
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};
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/** Get the osg::Camera that draws the GUI, if any, from a camera
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* group.
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* @param cgroup the camera group
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* @return the GUI camera or 0
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*/
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osg::Camera* getGUICamera(CameraGroup* cgroup);
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/** Choose a camera using an event and do intersection testing on its
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* view of the scene. Only cameras with the DO_INTERSECTION_TEST flag
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* set are considered.
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* @param cgroup the CameraGroup
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* @param ea the event containing a window and mouse coordinates
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* @param intersections container for the result of intersection
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* testing.
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* @return true if any intersections are found
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*/
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bool computeIntersections(const CameraGroup* cgroup,
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const osg::Vec2d& windowPos,
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osgUtil::LineSegmentIntersector::Intersections&
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intersections);
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/** Warp the pointer to coordinates in the GUI camera of a camera group.
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* @param cgroup the camera group
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* @param x x window coordinate of pointer
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* @param y y window coordinate of pointer, in "y down" coordinates.
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*/
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void warpGUIPointer(CameraGroup* cgroup, int x, int y);
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}
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#endif
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