1 // Copyright (C) 2008 Tim Moore
3 // This program is free software; you can redistribute it and/or
4 // modify it under the terms of the GNU General Public License as
5 // published by the Free Software Foundation; either version 2 of the
6 // License, or (at your option) any later version.
8 // This program is distributed in the hope that it will be useful, but
9 // WITHOUT ANY WARRANTY; without even the implied warranty of
10 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 // General Public License for more details.
13 // You should have received a copy of the GNU General Public License
14 // along with this program; if not, write to the Free Software
15 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
17 #ifndef CAMERAGROUP_HXX
18 #define CAMERAGROUP_HXX 1
25 #include <osg/ref_ptr>
26 #include <osg/Referenced>
28 #include <osg/TextureRectangle>
30 // For osgUtil::LineSegmentIntersector::Intersections, which is a typedef.
31 #include <osgUtil/LineSegmentIntersector>
49 struct RenderStageInfo {
50 RenderStageInfo(osg::Camera* camera_ = 0, int si = -1)
51 : camera(camera_), slaveIndex(si), scaleFactor(1.0f)
55 osg::ref_ptr<osg::Camera> camera;
60 /** A wrapper around osg::Camera that contains some extra information.
62 struct CameraInfo : public osg::Referenced
64 CameraInfo(unsigned flags_, osg::Camera* camera_ = 0)
66 x(0.0), y(0.0), width(0.0), height(0.0),
67 physicalWidth(0), physicalHeight(0), bezelHeightTop(0),
68 bezelHeightBottom(0), bezelWidthLeft(0), bezelWidthRight(0),
69 relativeCameraParent(~0u)
71 cameras.insert( std::make_pair( MAIN_CAMERA, camera_ ) );
78 typedef std::map<CameraKind,RenderStageInfo> CameraMap;
80 /** Update and resize cameras
83 /** The name as given in the config file.
86 /** Properties of the camera. @see CameraGroup::Flags.
89 /** the camera objects
92 void addCamera( CameraKind k, osg::Camera* c, int si = -1 ) { cameras[k] = RenderStageInfo(c,si); }
93 osg::Camera* getCamera(CameraKind k) const;
94 osg::Camera* getMainCamera() const;
95 int getMainSlaveIndex() const;
96 /** Viewport parameters.
102 /** Physical size parameters.
104 double physicalWidth;
105 double physicalHeight;
106 double bezelHeightTop;
107 double bezelHeightBottom;
108 double bezelWidthLeft;
109 double bezelWidthRight;
110 /** The parent camera for relative camera configurations.
112 unsigned relativeCameraParent;
113 /** The reference points in the parents projection space.
115 osg::Vec2d parentReference[2];
116 /** The reference points in the current projection space.
118 osg::Vec2d thisReference[2];
121 /** Update the OSG cameras from the camera info.
123 void updateCameras(const CameraInfo* info);
125 class CameraGroup : public osg::Referenced
128 /** properties of a camera.
132 VIEW_ABSOLUTE = 0x1, /**< The camera view is absolute, not
133 relative to the master camera. */
134 PROJECTION_ABSOLUTE = 0x2, /**< The projection is absolute. */
135 ORTHO = 0x4, /**< The projection is orthographic */
136 GUI = 0x8, /**< Camera draws the GUI. */
137 DO_INTERSECTION_TEST = 0x10,/**< scene intersection tests this
139 FIXED_NEAR_FAR = 0x20, /**< take the near far values in the
140 projection for real. */
141 ENABLE_MASTER_ZOOM = 0x40 /**< Can apply the zoom algorithm. */
143 /** Create a camera group associated with an osgViewer::Viewer.
144 * @param viewer the viewer
146 CameraGroup(osgViewer::Viewer* viewer);
147 /** Get the camera group's Viewer.
150 osgViewer::Viewer* getViewer() { return _viewer.get(); }
151 /** Create an osg::Camera from a property node and add it to the
153 * @param cameraNode the property node.
154 * @return a CameraInfo object for the camera.
156 CameraInfo* buildCamera(SGPropertyNode* cameraNode);
157 /** Create a camera from properties that will draw the GUI and add
158 * it to the camera group.
159 * @param cameraNode the property node. This can be 0, in which
160 * case a default GUI camera is created.
161 * @param window the GraphicsWindow to use for the GUI camera. If
162 * this is 0, the window is determined from the property node.
163 * @return a CameraInfo object for the GUI camera.
165 CameraInfo* buildGUICamera(SGPropertyNode* cameraNode,
166 GraphicsWindow* window = 0);
167 /** Update the view for the camera group.
168 * @param position the world position of the view
169 * @param orientation the world orientation of the view.
171 void update(const osg::Vec3d& position, const osg::Quat& orientation);
172 /** Set the parameters of the viewer's master camera. This won't
173 * affect cameras that have CameraFlags::PROJECTION_ABSOLUTE set.
174 * XXX Should znear and zfar be settable?
175 * @param vfov the vertical field of view angle
176 * @param aspectRatio the master camera's aspect ratio. This
177 * doesn't actually change the viewport, but should reflect the
180 void setCameraParameters(float vfov, float aspectRatio);
181 /** Set the default CameraGroup, which is the only one that
182 * matters at this time.
183 * @param group the group to set.
185 static void setDefault(CameraGroup* group) { _defaultGroup = group; }
186 /** Get the default CameraGroup.
187 * @return the default camera group.
189 static CameraGroup* getDefault() { return _defaultGroup.get(); }
190 typedef std::vector<osg::ref_ptr<CameraInfo> > CameraList;
191 typedef CameraList::iterator CameraIterator;
192 typedef CameraList::const_iterator ConstCameraIterator;
193 /** Get iterator for camera vector. The iterator's value is a ref_ptr.
195 CameraIterator camerasBegin() { return _cameras.begin(); }
196 /** Get iteator pointing to the end of the camera list.
198 CameraIterator camerasEnd() { return _cameras.end(); }
199 ConstCameraIterator camerasBegin() const { return _cameras.begin(); }
200 ConstCameraIterator camerasEnd() const { return _cameras.end(); }
201 void addCamera(CameraInfo* info) { _cameras.push_back(info); }
202 /** Build a complete CameraGroup from a property node.
203 * @param viewer the viewer associated with this camera group.
204 * @param the camera group property node.
206 static CameraGroup* buildCameraGroup(osgViewer::Viewer* viewer,
207 SGPropertyNode* node);
208 /** Set the cull mask on all non-GUI cameras
210 void setCameraCullMasks(osg::Node::NodeMask nm);
211 /** Update camera properties after a resize event.
215 void buildDistortionCamera(const SGPropertyNode* psNode,
216 osg::Camera* camera);
219 * get aspect ratio of master camera's viewport
221 double getMasterAspectRatio() const;
224 * find the GUI camera if one is defined
226 const CameraInfo* getGUICamera() const;
229 osg::ref_ptr<osgViewer::Viewer> _viewer;
230 static osg::ref_ptr<CameraGroup> _defaultGroup;
231 // Near, far for the master camera if used.
235 typedef std::map<std::string, osg::ref_ptr<osg::TextureRectangle> > TextureMap;
236 TextureMap _textureTargets;
243 class GUIEventAdapter;
248 /** Get the osg::Camera that draws the GUI, if any, from a camera
250 * @param cgroup the camera group
251 * @return the GUI camera or 0
253 osg::Camera* getGUICamera(CameraGroup* cgroup);
254 /** Choose a camera using an event and do intersection testing on its
255 * view of the scene. Only cameras with the DO_INTERSECTION_TEST flag
256 * set are considered.
257 * @param cgroup the CameraGroup
258 * @param ea the event containing a window and mouse coordinates
259 * @param intersections container for the result of intersection
261 * @return true if any intersections are found
263 bool computeIntersections(const CameraGroup* cgroup,
264 const osgGA::GUIEventAdapter* ea,
265 osgUtil::LineSegmentIntersector::Intersections&
267 /** Warp the pointer to coordinates in the GUI camera of a camera group.
268 * @param cgroup the camera group
269 * @param x x window coordinate of pointer
270 * @param y y window coordinate of pointer, in "y down" coordinates.
272 void warpGUIPointer(CameraGroup* cgroup, int x, int y);