This class allows the user to create, load, save, and render 3D scenes using OpenGL primitives.
The class can be understood as a program to be run over OpenGL, containing a sequence of viewport definitions, rendering primitives, etc...
It can contain from 1 up to any number of Viewports, each one associated a set of OpenGL objects and, optionally, a preferred camera position. Both orthogonal (2D/3D) and projection camera models can be used for each viewport independently, greatly increasing the possibilities of rendered scenes.
An object of COpenGLScene always contains at least one viewport (utils::COpenGLViewport), named "main". Optionally, any number of other viewports may exist. Viewports are referenced by their names, case-sensitive strings. Each viewport contains a different 3D scene (i.e. they render different objects), though a mechanism exist to share the same 3D scene by a number of viewports so memory is not wasted replicating the same objects (see COpenGLViewport::setCloneView ).
The main rendering method, COpenGLScene::render(), assumes a viewport has been set-up for the entire target window. That method will internally make the required calls to opengl for creating the additional viewports. Note that only the depth buffer is cleared by default for each (non-main) viewport, to allow transparencies. This can be disabled by the approppriate member in COpenGLViewport.
An object COpenGLScene can be saved to a ".3Dscene" file using CFileOutputStream, for posterior visualization from the standalone application SceneViewer. It can be also displayed in real-time using gui::CDisplayWindow3D.
Definition at line 49 of file COpenGLScene.h.
#include <mrpt/opengl/COpenGLScene.h>
Public Member Functions | |
COpenGLScene () | |
Constructor. | |
virtual | ~COpenGLScene () |
Destructor: | |
COpenGLScene & | operator= (const COpenGLScene &obj) |
Copy operator: | |
COpenGLScene (const COpenGLScene &obj) | |
Copy constructor: | |
template<class T > | |
void | insertCollection (const T &objs, const std::string &vpn=std::string("main")) |
Inserts a set of objects into the scene, in the given viewport ("main" by default). | |
void | insert (const CRenderizablePtr &newObject, const std::string &viewportName=std::string("main")) |
Insert a new object into the scene, in the given viewport (by default, into the "main" viewport). | |
template<class T_it > | |
void | insert (const T_it &begin, const T_it &end, const std::string &vpn=std::string("main")) |
Inserts a set of objects into the scene, in the given viewport ("main" by default). | |
COpenGLViewportPtr | createViewport (const std::string &viewportName) |
Creates a new viewport, adding it to the scene and returning a pointer to the new object. | |
COpenGLViewportPtr | getViewport (const std::string &viewportName=std::string("main")) const |
Returns the viewport with the given name, or NULL if it does not exist; note that the default viewport is named "main" and initially occupies the entire rendering area. | |
void | render () const |
Render this scene. | |
size_t | viewportsCount () const |
void | clear (bool createMainViewport=true) |
Clear the list of objects and viewports in the scene, deleting objects' memory, and leaving just the default viewport with the default values. | |
void | enableFollowCamera (bool enabled) |
If disabled (default), the SceneViewer application will ignore the camera of the "main" viewport and keep the viewport selected by the user by hand; otherwise, the camera in the "main" viewport prevails. | |
bool | followCamera () const |
Return the value of "followCamera". | |
CRenderizablePtr | getByName (const std::string &str, const std::string &viewportName=std::string("main")) |
Returns the first object with a given name, or NULL (an empty smart pointer) if not found. | |
template<typename T > | |
T::SmartPtr | getByClass (const size_t &ith=0) const |
Returns the i'th object of a given class (or of a descendant class), or NULL (an empty smart pointer) if not found. | |
void | removeObject (const CRenderizablePtr &obj, const std::string &viewportName=std::string("main")) |
Removes the given object from the scene (it also deletes the object to free its memory). | |
void | initializeAllTextures () |
Initializes all textures in the scene (See opengl::CTexturedPlane::loadTextureInOpenGL) | |
void | dumpListOfObjects (mrpt::utils::CStringList &lst) |
Retrieves a list of all objects in text form. | |
bool | saveToFile (const std::string &fil) const |
Saves the scene to a 3Dscene file, loadable by the application SceneViewer3D. | |
bool | loadFromFile (const std::string &fil) |
Loads the scene from a 3Dscene file, the format used by the application SceneViewer3D. | |
bool | traceRay (const mrpt::poses::CPose3D &o, double &dist) const |
Traces a ray. | |
void | getBoundingBox (mrpt::math::TPoint3D &bb_min, mrpt::math::TPoint3D &bb_max, const std::string &vpn=std::string("main")) const |
Evaluates the bounding box of the scene in the given viewport (default: "main"). | |
template<typename FUNCTOR > | |
void | visitAllObjects (FUNCTOR functor) const |
Recursive depth-first visit all objects in all viewports of the scene, calling the user-supplied function The passed function must accept only one argument of type "const mrpt::opengl::CRenderizablePtr &". | |
template<typename FUNCTOR , typename EXTRA_PARAM > | |
void | visitAllObjects (FUNCTOR functor, const EXTRA_PARAM &userParam) const |
Recursive depth-first visit all objects in all viewports of the scene, calling the user-supplied function The passed function must accept a first argument of type "const mrpt::opengl::CRenderizablePtr &" and a second one of type EXTRA_PARAM. | |
Protected Types | |
typedef std::vector< COpenGLViewportPtr > | TListViewports |
Protected Member Functions | |
CSerializable virtual methods | |
void | writeToStream (mrpt::utils::CStream &out, int *getVersion) const MRPT_OVERRIDE |
void | readFromStream (mrpt::utils::CStream &in, int version) MRPT_OVERRIDE |
Static Protected Member Functions | |
template<typename FUNCTOR > | |
static void | internal_visitAllObjects (FUNCTOR functor, const CRenderizablePtr &o) |
Protected Attributes | |
bool | m_followCamera |
TListViewports | m_viewports |
The list of viewports, indexed by name. | |
RTTI stuff <br> | |
typedef COpenGLScenePtr | SmartPtr |
static mrpt::utils::CLASSINIT | _init_COpenGLScene |
static mrpt::utils::TRuntimeClassId | classCOpenGLScene |
static const mrpt::utils::TRuntimeClassId * | classinfo |
static const mrpt::utils::TRuntimeClassId * | _GetBaseClass () |
virtual const mrpt::utils::TRuntimeClassId * | GetRuntimeClass () const MRPT_OVERRIDE |
virtual mrpt::utils::CObject * | duplicate () const MRPT_OVERRIDE |
static mrpt::utils::CObject * | CreateObject () |
static COpenGLScenePtr | Create () |
A typedef for the associated smart pointer
Definition at line 51 of file COpenGLScene.h.
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protected |
Definition at line 201 of file COpenGLScene.h.
mrpt::opengl::COpenGLScene::COpenGLScene | ( | ) |
Constructor.
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virtual |
Destructor:
mrpt::opengl::COpenGLScene::COpenGLScene | ( | const COpenGLScene & | obj | ) |
Copy constructor:
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staticprotected |
void mrpt::opengl::COpenGLScene::clear | ( | bool | createMainViewport = true | ) |
Clear the list of objects and viewports in the scene, deleting objects' memory, and leaving just the default viewport with the default values.
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COpenGLViewportPtr mrpt::opengl::COpenGLScene::createViewport | ( | const std::string & | viewportName | ) |
Creates a new viewport, adding it to the scene and returning a pointer to the new object.
Names (case-sensitive) cannot be duplicated: if the name provided coincides with an already existing viewport, a pointer to the existing object will be returned. The first, default viewport, is named "main".
void mrpt::opengl::COpenGLScene::dumpListOfObjects | ( | mrpt::utils::CStringList & | lst | ) |
Retrieves a list of all objects in text form.
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inline |
If disabled (default), the SceneViewer application will ignore the camera of the "main" viewport and keep the viewport selected by the user by hand; otherwise, the camera in the "main" viewport prevails.
Definition at line 113 of file COpenGLScene.h.
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inline |
Return the value of "followCamera".
Definition at line 118 of file COpenGLScene.h.
void mrpt::opengl::COpenGLScene::getBoundingBox | ( | mrpt::math::TPoint3D & | bb_min, |
mrpt::math::TPoint3D & | bb_max, | ||
const std::string & | vpn = std::string("main") |
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) | const |
Evaluates the bounding box of the scene in the given viewport (default: "main").
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inline |
Returns the i'th object of a given class (or of a descendant class), or NULL (an empty smart pointer) if not found.
Example:
By default (ith=0), the first observation is returned.
Definition at line 132 of file COpenGLScene.h.
References MRPT_END, and MRPT_START.
CRenderizablePtr mrpt::opengl::COpenGLScene::getByName | ( | const std::string & | str, |
const std::string & | viewportName = std::string("main") |
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) |
Returns the first object with a given name, or NULL (an empty smart pointer) if not found.
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COpenGLViewportPtr mrpt::opengl::COpenGLScene::getViewport | ( | const std::string & | viewportName = std::string("main") | ) | const |
Returns the viewport with the given name, or NULL if it does not exist; note that the default viewport is named "main" and initially occupies the entire rendering area.
void mrpt::opengl::COpenGLScene::initializeAllTextures | ( | ) |
Initializes all textures in the scene (See opengl::CTexturedPlane::loadTextureInOpenGL)
void mrpt::opengl::COpenGLScene::insert | ( | const CRenderizablePtr & | newObject, |
const std::string & | viewportName = std::string("main") |
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) |
Insert a new object into the scene, in the given viewport (by default, into the "main" viewport).
The viewport must be created previously, an exception will be raised if the given name does not correspond to an existing viewport.
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inline |
Inserts a set of objects into the scene, in the given viewport ("main" by default).
Definition at line 87 of file COpenGLScene.h.
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inline |
Inserts a set of objects into the scene, in the given viewport ("main" by default).
Any iterable object will be accepted.
Definition at line 73 of file COpenGLScene.h.
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inlinestaticprotected |
Definition at line 207 of file COpenGLScene.h.
References mrpt::opengl::CSetOfObjectsPtr, and IS_CLASS.
bool mrpt::opengl::COpenGLScene::loadFromFile | ( | const std::string & | fil | ) |
Loads the scene from a 3Dscene file, the format used by the application SceneViewer3D.
COpenGLScene & mrpt::opengl::COpenGLScene::operator= | ( | const COpenGLScene & | obj | ) |
Copy operator:
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protected |
void mrpt::opengl::COpenGLScene::removeObject | ( | const CRenderizablePtr & | obj, |
const std::string & | viewportName = std::string("main") |
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) |
Removes the given object from the scene (it also deletes the object to free its memory).
void mrpt::opengl::COpenGLScene::render | ( | ) | const |
Render this scene.
bool mrpt::opengl::COpenGLScene::saveToFile | ( | const std::string & | fil | ) | const |
Saves the scene to a 3Dscene file, loadable by the application SceneViewer3D.
bool mrpt::opengl::COpenGLScene::traceRay | ( | const mrpt::poses::CPose3D & | o, |
double & | dist | ||
) | const |
Traces a ray.
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inline |
Definition at line 104 of file COpenGLScene.h.
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inline |
Recursive depth-first visit all objects in all viewports of the scene, calling the user-supplied function The passed function must accept only one argument of type "const mrpt::opengl::CRenderizablePtr &".
Definition at line 180 of file COpenGLScene.h.
References MRPT_END, and MRPT_START.
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inline |
Recursive depth-first visit all objects in all viewports of the scene, calling the user-supplied function The passed function must accept a first argument of type "const mrpt::opengl::CRenderizablePtr &" and a second one of type EXTRA_PARAM.
Definition at line 194 of file COpenGLScene.h.
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staticprotected |
Definition at line 51 of file COpenGLScene.h.
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Definition at line 51 of file COpenGLScene.h.
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Definition at line 51 of file COpenGLScene.h.
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protected |
Definition at line 199 of file COpenGLScene.h.
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The list of viewports, indexed by name.
Definition at line 203 of file COpenGLScene.h.
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