340 lines
15 KiB
Plaintext
340 lines
15 KiB
Plaintext
//C++ header - Open Scene Graph - Copyright (C) 1998-2002 Robert Osfield
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//Distributed under the terms of the GNU Library General Public License (LGPL)
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//as published by the Free Software Foundation.
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#ifndef OSGUTIL_SCENEVIEW
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#define OSGUTIL_SCENEVIEW 1
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#include <osg/Node>
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#include <osg/StateSet>
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#include <osg/Light>
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#include <osg/Camera>
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#include <osg/FrameStamp>
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#include <osg/DisplaySettings>
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#include <osgUtil/CullVisitor>
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namespace osgUtil {
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/**
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* SceneView is literally a view of a scene, encapsulating the
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* camera, global state, lights and the scene itself. Provides
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* methods for setting up the view and rendering it.
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*/
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class OSGUTIL_EXPORT SceneView : public osg::Referenced
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{
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public:
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/** Construct a default scene view.*/
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SceneView(osg::DisplaySettings* ds=NULL);
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/** Set scene view to use default global state, light, camera
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* and render visitor.
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*/
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void setDefaults();
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/** Set the data which to view. The data will typically be
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* an osg::Scene but can be any osg::Node type.
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*/
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void setSceneData(osg::Node* node) { _sceneData = node; }
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/** Get the scene data which to view. The data will typically be
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* an osg::Scene but can be any osg::Node type.
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*/
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osg::Node* getSceneData() { return _sceneData.get(); }
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/** Get the const scene data which to view. The data will typically be
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* an osg::Scene but can be any osg::Node type.
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*/
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const osg::Node* getSceneData() const { return _sceneData.get(); }
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/** Set the viewport of the scene view to use specfied osg::Viewport. */
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void setViewport(osg::Viewport* viewport)
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{
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if (viewport) _viewport = viewport;
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else
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{
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// ensure that _viewport is always valid.
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_viewport = osgNew osg::Viewport;
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}
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}
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/** Set the viewport of the scene view to specified dimensions. */
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void setViewport(int x,int y,int width,int height)
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{
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_viewport->setViewport(x,y,width,height);
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}
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/** Get the const viewport. */
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const osg::Viewport* getViewport() const { return _viewport.get(); }
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/** Get the viewport. */
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osg::Viewport* getViewport() { return _viewport.get(); }
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/** Get the viewport of the scene view. */
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void getViewport(int& x,int& y,int& width,int& height)
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{
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_viewport->getViewport(x,y,width,height);
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}
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/** Set the DisplaySettings. */
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inline void setDisplaySettings(osg::DisplaySettings* vs) { _displaySettings = vs; }
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/** Get the const DisplaySettings */
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inline const osg::DisplaySettings* getDisplaySettings() const { return _displaySettings.get(); }
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/** Get the DisplaySettings */
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inline osg::DisplaySettings* getDisplaySettings() { return _displaySettings.get(); }
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/** Set the background color used in glClearColor().
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Defaults to an off blue color.*/
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void setBackgroundColor(const osg::Vec4& color) { _backgroundColor=color; }
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/** Get the background color.*/
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const osg::Vec4& getBackgroundColor() const { return _backgroundColor; }
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void setGlobalStateSet(osg::StateSet* state) { _globalState = state; }
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osg::StateSet* getGlobalStateSet() { return _globalState.get(); }
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const osg::StateSet* getGlobalStateSet() const { return _globalState.get(); }
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enum LightingMode {
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HEADLIGHT, // default
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SKY_LIGHT,
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NO_SCENEVIEW_LIGHT
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};
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void setLightingMode(LightingMode mode) { _lightingMode=mode; }
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LightingMode getLightingMode() const { return _lightingMode; }
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void setLight(osg::Light* light) { _light = light; }
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osg::Light* getLight() { return _light.get(); }
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const osg::Light* getLight() const { return _light.get(); }
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void setState(osg::State* state) { _state = state; }
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osg::State* getState() { return _state.get(); }
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const osg::State* getState() const { return _state.get(); }
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/** set an osg::Camera for the scene view to use for setting projection and modelview matrices internaly.
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* However, the projection matrix from the camera will be overriden by a projection matrix which is set explicitly
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* via setProjectionMatrix(..), see below.
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* Also, the model matrix from the camera will be overriden by a modelview matrix which is set explicitly
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* via setModelViewMatrix(..), see below.*/
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void setCamera(osg::Camera* camera) { _camera = camera; }
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osg::Camera* getCamera() { return _camera.get(); }
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const osg::Camera* getCamera() const { return _camera.get(); }
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/** set a projection matrix. Note, this will override a camera's projection matrix if it is not NULL.*/
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void setProjectionMatrix(osg::Matrix* matrix) { _projectionMatrix = matrix; }
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osg::Matrix* getProjectionMatrix() { return _projectionMatrix.get(); }
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const osg::Matrix* getProjectionMatrix() const { return _projectionMatrix.get(); }
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/** set a modelview matrix. Note, this will override a camera's modelview matrix if it is not NULL.*/
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void setModelViewMatrix(osg::Matrix* matrix) { _modelviewMatrix = matrix; }
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osg::Matrix* getModelViewMatrix() { return _modelviewMatrix.get(); }
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const osg::Matrix* getModelViewMatrix() const { return _modelviewMatrix.get(); }
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void setInitVisitor(osg::NodeVisitor* av) { _initVisitor = av; }
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osg::NodeVisitor* getInitVisitor() { return _initVisitor.get(); }
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const osg::NodeVisitor* getInitVisitor() const { return _initVisitor.get(); }
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void setAppVisitor(osg::NodeVisitor* av) { _appVisitor = av; }
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osg::NodeVisitor* getAppVisitor() { return _appVisitor.get(); }
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const osg::NodeVisitor* getAppVisitor() const { return _appVisitor.get(); }
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void setCullVisitor(osgUtil::CullVisitor* cv) { _cullVisitor = cv; }
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osgUtil::CullVisitor* getCullVisitor() { return _cullVisitor.get(); }
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const osgUtil::CullVisitor* getCullVisitor() const { return _cullVisitor.get(); }
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void setRenderGraph(osgUtil::RenderGraph* rg) { _rendergraph = rg; }
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osgUtil::RenderGraph* getRenderGraph() { return _rendergraph.get(); }
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const osgUtil::RenderGraph* getRenderGraph() const { return _rendergraph.get(); }
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void setRenderStage(osgUtil::RenderStage* rs) { _renderStage = rs; }
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osgUtil::RenderStage* getRenderStage() { return _renderStage.get(); }
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const osgUtil::RenderStage* getRenderStage() const { return _renderStage.get(); }
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void setCullMask(const osg::Node::NodeMask nm) { _cullMask = nm; }
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const osg::Node::NodeMask getCullMask() const { return _cullMask; }
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void setCullMaskLeft(const osg::Node::NodeMask nm) { _cullMaskLeft = nm; }
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const osg::Node::NodeMask getCullMaskLeft() const { return _cullMaskLeft; }
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void setCullMaskRight(const osg::Node::NodeMask nm) { _cullMaskRight = nm; }
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const osg::Node::NodeMask getCullMaskRight() const { return _cullMaskRight; }
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/** Set the LOD bias for the CullVisitor to use.*/
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void setLODScale(float bias) { _LODScale = bias; }
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/** Get the LOD bias.*/
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float getLODScale() const { return _LODScale; }
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/** Set the Small Feature Culling Pixel Size.*/
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void setSmallFeatureCullingPixelSize(float value) { _smallFeatureCullingPixelSize=value; }
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/** Get the Small Feature Culling Pixel Size.*/
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float getSmallFeatureCullingPixelSize() const { return _smallFeatureCullingPixelSize; }
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/** Set the culling mode for the CullVisitor to use.*/
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void setCullingMode(osg::CullStack::CullingMode mode) { _cullingMode = mode; }
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/** Returns the current CullingMode.*/
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osg::CullStack::CullingMode getCullingMode() const { return _cullingMode; }
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/** Set the ComputeNearFarMode for the CullVisitor to use.*/
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void setComputeNearFarMode(CullVisitor::ComputeNearFarMode cnfm) { _computeNearFar=cnfm; }
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/** Get the ComputeNearFarMode.*/
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CullVisitor::ComputeNearFarMode getComputeNearFarMode() const { return _computeNearFar;}
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/** FusionDistanceMode is used only when working in stereo.*/
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enum FusionDistanceMode
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{
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/** Use fusion distance from the attached camera if one exist.*/
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USE_CAMERA_FUSION_DISTANCE,
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/** Use fusion distance from the value set on the SceneView.*/
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USE_FUSION_DISTANCE_VALUE,
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/** Compute the fusion distance by multiplying the screen distance by the fusion distance value.*/
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PROPORTIONAL_TO_SCREEN_DISTANCE
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};
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/** Set the FusionDistanceMode and Value. Note, is used only when working in stereo.*/
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void setFusionDistance(FusionDistanceMode mode,float value=1.0f)
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{
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_fusionDistanceMode = mode;
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_fusionDistanceValue = value;
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}
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/** Get the FusionDistanceMode.*/
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FusionDistanceMode getFusionDistanceMode() const { return _fusionDistanceMode; }
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/** Get the FusionDistanceValue. Note, only used for USE_FUSION_DISTANCE_VALUE & PROPORTIONAL_TO_SCREEN_DISTANCE modes.*/
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float getFusionDistanceValue() const { return _fusionDistanceValue; }
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/** set whether the draw method should call renderer->prioritizeTexture.*/
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void setPrioritizeTextures(bool pt) { _prioritizeTextures = pt; }
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/** get whether the draw method should call renderer->prioritizeTexture.*/
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bool getPrioritizeTextures() const { return _prioritizeTextures; }
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/** Calculate, via glUnProject, the object coordinates of a window point.
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Note, current implementation requires that SceneView::draw() has been previously called
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for projectWindowIntoObject to produce valid values. Consistent with OpenGL
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windows coordinates are calculated relative to the bottom left of the window.
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Returns true on successful projection.
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*/
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bool projectWindowIntoObject(const osg::Vec3& window,osg::Vec3& object) const;
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/** Calculate, via glUnProject, the object coordinates of a window x,y
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when projected onto the near and far planes.
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Note, current implementation requires that SceneView::draw() has been previously called
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for projectWindowIntoObject to produce valid values. Consistent with OpenGL
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windows coordinates are calculated relative to the bottom left of the window.
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Returns true on successful projection.
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*/
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bool projectWindowXYIntoObject(int x,int y,osg::Vec3& near_point,osg::Vec3& far_point) const;
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/** Calculate, via glProject, the object coordinates of a window.
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Note, current implementation requires that SceneView::draw() has been previously called
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for projectWindowIntoObject to produce valid values. Consistent with OpenGL
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windows coordinates are calculated relative to the bottom left of the window,
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whereas as window API's normally have the top left as the origin,
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so you may need to pass in (mouseX,window_height-mouseY,...).
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Returns true on successful projection.
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*/
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bool projectObjectIntoWindow(const osg::Vec3& object,osg::Vec3& window) const;
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/** Set the frame stamp for the current frame.*/
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inline void setFrameStamp(osg::FrameStamp* fs) { _frameStamp = fs; }
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/** Set the frame stamp for the current frame.*/
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inline const osg::FrameStamp* getFrameStamp() const { return _frameStamp.get(); }
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/** Do init traversal of attached scene graph using Init NodeVisitor.
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* The init traversal is called once for each SceneView, and should
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* be used to compile display list, texture objects intialize data
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* not otherwise intializaed during scene graph loading. Note, is
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* called automatically by app&cull if it hasn't already been called
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* elsewhere. Also init() should only ever be called within a valid
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* graphics context.*/
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virtual void init();
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/** Do app traversal of attached scene graph using App NodeVisitor.*/
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virtual void app();
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/** Do cull traversal of attached scene graph using Cull NodeVisitor.*/
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virtual void cull();
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/** Do draw traversal of draw bins generated by cull traversal.*/
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virtual void draw();
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protected:
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virtual ~SceneView();
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/** Do cull traversal of attached scene graph using Cull NodeVisitor.*/
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virtual void cullStage(osg::Matrix* projection,osg::Matrix* modelview,osgUtil::CullVisitor* cullVisitor, osgUtil::RenderGraph* rendergraph, osgUtil::RenderStage* renderStage);
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const osg::Matrix computeMVPW() const;
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void clearArea(int x,int y,int width,int height,const osg::Vec4& color);
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osg::ref_ptr<osg::Node> _sceneData;
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osg::ref_ptr<osg::StateSet> _globalState;
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osg::ref_ptr<osg::Light> _light;
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osg::ref_ptr<osg::Camera> _camera;
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osg::ref_ptr<osg::Matrix> _projectionMatrix;
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osg::ref_ptr<osg::Matrix> _modelviewMatrix;
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osg::ref_ptr<osg::DisplaySettings> _displaySettings;
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osg::ref_ptr<osg::State> _state;
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bool _initCalled;
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osg::ref_ptr<osg::NodeVisitor> _initVisitor;
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osg::ref_ptr<osg::NodeVisitor> _appVisitor;
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osg::Node::NodeMask _cullMask;
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osg::ref_ptr<osgUtil::CullVisitor> _cullVisitor;
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osg::ref_ptr<osgUtil::RenderGraph> _rendergraph;
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osg::ref_ptr<osgUtil::RenderStage> _renderStage;
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osg::Node::NodeMask _cullMaskLeft;
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osg::ref_ptr<osgUtil::CullVisitor> _cullVisitorLeft;
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osg::ref_ptr<osgUtil::RenderGraph> _rendergraphLeft;
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osg::ref_ptr<osgUtil::RenderStage> _renderStageLeft;
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osg::Node::NodeMask _cullMaskRight;
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osg::ref_ptr<osgUtil::CullVisitor> _cullVisitorRight;
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osg::ref_ptr<osgUtil::RenderGraph> _rendergraphRight;
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osg::ref_ptr<osgUtil::RenderStage> _renderStageRight;
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osg::ref_ptr<osg::FrameStamp> _frameStamp;
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osg::Vec4 _backgroundColor;
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CullVisitor::ComputeNearFarMode _computeNearFar;
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osg::CullStack::CullingMode _cullingMode;
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float _LODScale;
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float _smallFeatureCullingPixelSize;
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FusionDistanceMode _fusionDistanceMode;
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float _fusionDistanceValue;
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osg::ref_ptr<osg::Viewport> _viewport;
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LightingMode _lightingMode;
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bool _prioritizeTextures;
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};
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}
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#endif
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