mirror of https://github.com/opencv/opencv.git
Open Source Computer Vision Library
https://opencv.org/
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
642 lines
20 KiB
642 lines
20 KiB
Viz |
|
=== |
|
|
|
.. highlight:: cpp |
|
|
|
This section describes 3D visualization window as well as classes and methods |
|
that are used to interact with it. |
|
|
|
3D visualization window (see :ocv:class:`Viz3d`) is used to display widgets (see :ocv:class:`Widget`), and it provides |
|
several methods to interact with scene and widgets. |
|
|
|
viz::makeTransformToGlobal |
|
-------------------------- |
|
Takes coordinate frame data and builds transform to global coordinate frame. |
|
|
|
.. ocv:function:: Affine3f viz::makeTransformToGlobal(const Vec3f& axis_x, const Vec3f& axis_y, const Vec3f& axis_z, const Vec3f& origin = Vec3f::all(0)) |
|
|
|
:param axis_x: X axis vector in global coordinate frame. |
|
:param axis_y: Y axis vector in global coordinate frame. |
|
:param axis_z: Z axis vector in global coordinate frame. |
|
:param origin: Origin of the coordinate frame in global coordinate frame. |
|
|
|
This function returns affine transform that describes transformation between global coordinate frame and a given coordinate frame. |
|
|
|
viz::makeCameraPose |
|
------------------- |
|
Constructs camera pose from position, focal_point and up_vector (see gluLookAt() for more infromation). |
|
|
|
.. ocv:function:: Affine3f makeCameraPose(const Vec3f& position, const Vec3f& focal_point, const Vec3f& y_dir) |
|
|
|
:param position: Position of the camera in global coordinate frame. |
|
:param focal_point: Focal point of the camera in global coordinate frame. |
|
:param y_dir: Up vector of the camera in global coordinate frame. |
|
|
|
This function returns pose of the camera in global coordinate frame. |
|
|
|
viz::get |
|
-------- |
|
Retrieves a window by its name. |
|
|
|
.. ocv:function:: Viz3d get(const String &window_name) |
|
|
|
:param window_name: Name of the window that is to be retrieved. |
|
|
|
This function returns a :ocv:class:`Viz3d` object with the given name. |
|
|
|
.. note:: If the window with that name already exists, that window is returned. Otherwise, new window is created with the given name, and it is returned. |
|
|
|
.. note:: Window names are automatically prefixed by "Viz - " if it is not done by the user. |
|
|
|
.. code-block:: cpp |
|
|
|
/// window and window_2 are the same windows. |
|
viz::Viz3d window = viz::get("myWindow"); |
|
viz::Viz3d window_2 = viz::get("Viz - myWindow"); |
|
|
|
viz::isNan |
|
---------- |
|
Checks **float/double** value for nan. |
|
|
|
.. ocv:function:: bool isNan(float x) |
|
|
|
.. ocv:function:: bool isNan(double x) |
|
|
|
:param x: return true if nan. |
|
|
|
Checks **vector** for nan. |
|
|
|
.. ocv:function:: bool isNan(const Vec<_Tp, cn>& v) |
|
|
|
:param v: return true if **any** of the elements of the vector is *nan*. |
|
|
|
Checks **point** for nan |
|
|
|
.. ocv:function:: bool isNan(const Point3_<_Tp>& p) |
|
|
|
:param p: return true if **any** of the elements of the point is *nan*. |
|
|
|
viz::Viz3d |
|
---------- |
|
.. ocv:class:: Viz3d |
|
|
|
The Viz3d class represents a 3D visualizer window. This class is implicitly shared. :: |
|
|
|
class CV_EXPORTS Viz3d |
|
{ |
|
public: |
|
typedef cv::Ptr<Viz3d> Ptr; |
|
typedef void (*KeyboardCallback)(const KeyboardEvent&, void*); |
|
typedef void (*MouseCallback)(const MouseEvent&, void*); |
|
|
|
Viz3d(const String& window_name = String()); |
|
Viz3d(const Viz3d&); |
|
Viz3d& operator=(const Viz3d&); |
|
~Viz3d(); |
|
|
|
void showWidget(const String &id, const Widget &widget, const Affine3f &pose = Affine3f::Identity()); |
|
void removeWidget(const String &id); |
|
Widget getWidget(const String &id) const; |
|
void removeAllWidgets(); |
|
|
|
void setWidgetPose(const String &id, const Affine3f &pose); |
|
void updateWidgetPose(const String &id, const Affine3f &pose); |
|
Affine3f getWidgetPose(const String &id) const; |
|
|
|
void setCamera(const Camera &camera); |
|
Camera getCamera() const; |
|
Affine3f getViewerPose(); |
|
void setViewerPose(const Affine3f &pose); |
|
|
|
void resetCameraViewpoint (const String &id); |
|
void resetCamera(); |
|
|
|
void convertToWindowCoordinates(const Point3d &pt, Point3d &window_coord); |
|
void converTo3DRay(const Point3d &window_coord, Point3d &origin, Vec3d &direction); |
|
|
|
Size getWindowSize() const; |
|
void setWindowSize(const Size &window_size); |
|
String getWindowName() const; |
|
void saveScreenshot (const String &file); |
|
void setWindowPosition (int x, int y); |
|
void setFullScreen (bool mode); |
|
void setBackgroundColor(const Color& color = Color::black()); |
|
|
|
void spin(); |
|
void spinOnce(int time = 1, bool force_redraw = false); |
|
bool wasStopped() const; |
|
|
|
void registerKeyboardCallback(KeyboardCallback callback, void* cookie = 0); |
|
void registerMouseCallback(MouseCallback callback, void* cookie = 0); |
|
|
|
void setRenderingProperty(const String &id, int property, double value); |
|
double getRenderingProperty(const String &id, int property); |
|
|
|
void setDesiredUpdateRate(double rate); |
|
double getDesiredUpdateRate(); |
|
|
|
void setRepresentation(int representation); |
|
private: |
|
/* hidden */ |
|
}; |
|
|
|
viz::Viz3d::Viz3d |
|
----------------- |
|
The constructors. |
|
|
|
.. ocv:function:: Viz3d::Viz3d(const String& window_name = String()) |
|
|
|
:param window_name: Name of the window. |
|
|
|
viz::Viz3d::showWidget |
|
---------------------- |
|
Shows a widget in the window. |
|
|
|
.. ocv:function:: void Viz3d::showWidget(const String &id, const Widget &widget, const Affine3f &pose = Affine3f::Identity()) |
|
|
|
:param id: A unique id for the widget. |
|
:param widget: The widget to be displayed in the window. |
|
:param pose: Pose of the widget. |
|
|
|
viz::Viz3d::removeWidget |
|
------------------------ |
|
Removes a widget from the window. |
|
|
|
.. ocv:function:: void removeWidget(const String &id) |
|
|
|
:param id: The id of the widget that will be removed. |
|
|
|
viz::Viz3d::getWidget |
|
--------------------- |
|
Retrieves a widget from the window. A widget is implicitly shared; |
|
that is, if the returned widget is modified, the changes will be |
|
immediately visible in the window. |
|
|
|
.. ocv:function:: Widget getWidget(const String &id) const |
|
|
|
:param id: The id of the widget that will be returned. |
|
|
|
viz::Viz3d::removeAllWidgets |
|
---------------------------- |
|
Removes all widgets from the window. |
|
|
|
.. ocv:function:: void removeAllWidgets() |
|
|
|
viz::Viz3d::setWidgetPose |
|
------------------------- |
|
Sets pose of a widget in the window. |
|
|
|
.. ocv:function:: void setWidgetPose(const String &id, const Affine3f &pose) |
|
|
|
:param id: The id of the widget whose pose will be set. |
|
:param pose: The new pose of the widget. |
|
|
|
viz::Viz3d::updateWidgetPose |
|
---------------------------- |
|
Updates pose of a widget in the window by pre-multiplying its current pose. |
|
|
|
.. ocv:function:: void updateWidgetPose(const String &id, const Affine3f &pose) |
|
|
|
:param id: The id of the widget whose pose will be updated. |
|
:param pose: The pose that the current pose of the widget will be pre-multiplied by. |
|
|
|
viz::Viz3d::getWidgetPose |
|
------------------------- |
|
Returns the current pose of a widget in the window. |
|
|
|
.. ocv:function:: Affine3f getWidgetPose(const String &id) const |
|
|
|
:param id: The id of the widget whose pose will be returned. |
|
|
|
viz::Viz3d::setCamera |
|
--------------------- |
|
Sets the intrinsic parameters of the viewer using Camera. |
|
|
|
.. ocv:function:: void setCamera(const Camera &camera) |
|
|
|
:param camera: Camera object wrapping intrinsinc parameters. |
|
|
|
viz::Viz3d::getCamera |
|
--------------------- |
|
Returns a camera object that contains intrinsic parameters of the current viewer. |
|
|
|
.. ocv:function:: Camera getCamera() const |
|
|
|
viz::Viz3d::getViewerPose |
|
------------------------- |
|
Returns the current pose of the viewer. |
|
|
|
..ocv:function:: Affine3f getViewerPose() |
|
|
|
viz::Viz3d::setViewerPose |
|
------------------------- |
|
Sets pose of the viewer. |
|
|
|
.. ocv:function:: void setViewerPose(const Affine3f &pose) |
|
|
|
:param pose: The new pose of the viewer. |
|
|
|
viz::Viz3d::resetCameraViewpoint |
|
-------------------------------- |
|
Resets camera viewpoint to a 3D widget in the scene. |
|
|
|
.. ocv:function:: void resetCameraViewpoint (const String &id) |
|
|
|
:param pose: Id of a 3D widget. |
|
|
|
viz::Viz3d::resetCamera |
|
----------------------- |
|
Resets camera. |
|
|
|
.. ocv:function:: void resetCamera() |
|
|
|
viz::Viz3d::convertToWindowCoordinates |
|
-------------------------------------- |
|
Transforms a point in world coordinate system to window coordinate system. |
|
|
|
.. ocv:function:: void convertToWindowCoordinates(const Point3d &pt, Point3d &window_coord) |
|
|
|
:param pt: Point in world coordinate system. |
|
:param window_coord: Output point in window coordinate system. |
|
|
|
viz::Viz3d::converTo3DRay |
|
------------------------- |
|
Transforms a point in window coordinate system to a 3D ray in world coordinate system. |
|
|
|
.. ocv:function:: void converTo3DRay(const Point3d &window_coord, Point3d &origin, Vec3d &direction) |
|
|
|
:param window_coord: Point in window coordinate system. |
|
:param origin: Output origin of the ray. |
|
:param direction: Output direction of the ray. |
|
|
|
viz::Viz3d::getWindowSize |
|
------------------------- |
|
Returns the current size of the window. |
|
|
|
.. ocv:function:: Size getWindowSize() const |
|
|
|
viz::Viz3d::setWindowSize |
|
------------------------- |
|
Sets the size of the window. |
|
|
|
.. ocv:function:: void setWindowSize(const Size &window_size) |
|
|
|
:param window_size: New size of the window. |
|
|
|
viz::Viz3d::getWindowName |
|
------------------------- |
|
Returns the name of the window which has been set in the constructor. |
|
|
|
.. ocv:function:: String getWindowName() const |
|
|
|
viz::Viz3d::saveScreenshot |
|
-------------------------- |
|
Saves screenshot of the current scene. |
|
|
|
.. ocv:function:: void saveScreenshot(const String &file) |
|
|
|
:param file: Name of the file. |
|
|
|
viz::Viz3d::setWindowPosition |
|
----------------------------- |
|
Sets the position of the window in the screen. |
|
|
|
.. ocv:function:: void setWindowPosition(int x, int y) |
|
|
|
:param x: x coordinate of the window |
|
:param y: y coordinate of the window |
|
|
|
viz::Viz3d::setFullScreen |
|
------------------------- |
|
Sets or unsets full-screen rendering mode. |
|
|
|
.. ocv:function:: void setFullScreen(bool mode) |
|
|
|
:param mode: If true, window will use full-screen mode. |
|
|
|
viz::Viz3d::setBackgroundColor |
|
------------------------------ |
|
Sets background color. |
|
|
|
.. ocv:function:: void setBackgroundColor(const Color& color = Color::black()) |
|
|
|
viz::Viz3d::spin |
|
---------------- |
|
The window renders and starts the event loop. |
|
|
|
.. ocv:function:: void spin() |
|
|
|
viz::Viz3d::spinOnce |
|
-------------------- |
|
Starts the event loop for a given time. |
|
|
|
.. ocv:function:: void spinOnce(int time = 1, bool force_redraw = false) |
|
|
|
:param time: Amount of time in milliseconds for the event loop to keep running. |
|
:param force_draw: If true, window renders. |
|
|
|
viz::Viz3d::wasStopped |
|
---------------------- |
|
Returns whether the event loop has been stopped. |
|
|
|
.. ocv:function:: bool wasStopped() |
|
|
|
viz::Viz3d::registerKeyboardCallback |
|
------------------------------------ |
|
Sets keyboard handler. |
|
|
|
.. ocv:function:: void registerKeyboardCallback(KeyboardCallback callback, void* cookie = 0) |
|
|
|
:param callback: Keyboard callback ``(void (*KeyboardCallbackFunction(const KeyboardEvent&, void*))``. |
|
:param cookie: The optional parameter passed to the callback. |
|
|
|
viz::Viz3d::registerMouseCallback |
|
--------------------------------- |
|
Sets mouse handler. |
|
|
|
.. ocv:function:: void registerMouseCallback(MouseCallback callback, void* cookie = 0) |
|
|
|
:param callback: Mouse callback ``(void (*MouseCallback)(const MouseEvent&, void*))``. |
|
:param cookie: The optional parameter passed to the callback. |
|
|
|
viz::Viz3d::setRenderingProperty |
|
-------------------------------- |
|
Sets rendering property of a widget. |
|
|
|
.. ocv:function:: void setRenderingProperty(const String &id, int property, double value) |
|
|
|
:param id: Id of the widget. |
|
:param property: Property that will be modified. |
|
:param value: The new value of the property. |
|
|
|
**Rendering property** can be one of the following: |
|
|
|
* **POINT_SIZE** |
|
* **OPACITY** |
|
* **LINE_WIDTH** |
|
* **FONT_SIZE** |
|
* **REPRESENTATION**: Expected values are |
|
* **REPRESENTATION_POINTS** |
|
* **REPRESENTATION_WIREFRAME** |
|
* **REPRESENTATION_SURFACE** |
|
* **IMMEDIATE_RENDERING**: |
|
* Turn on immediate rendering by setting the value to ``1``. |
|
* Turn off immediate rendering by setting the value to ``0``. |
|
* **SHADING**: Expected values are |
|
* **SHADING_FLAT** |
|
* **SHADING_GOURAUD** |
|
* **SHADING_PHONG** |
|
|
|
viz::Viz3d::getRenderingProperty |
|
-------------------------------- |
|
Returns rendering property of a widget. |
|
|
|
.. ocv:function:: double getRenderingProperty(const String &id, int property) |
|
|
|
:param id: Id of the widget. |
|
:param property: Property. |
|
|
|
**Rendering property** can be one of the following: |
|
|
|
* **POINT_SIZE** |
|
* **OPACITY** |
|
* **LINE_WIDTH** |
|
* **FONT_SIZE** |
|
* **REPRESENTATION**: Expected values are |
|
* **REPRESENTATION_POINTS** |
|
* **REPRESENTATION_WIREFRAME** |
|
* **REPRESENTATION_SURFACE** |
|
* **IMMEDIATE_RENDERING**: |
|
* Turn on immediate rendering by setting the value to ``1``. |
|
* Turn off immediate rendering by setting the value to ``0``. |
|
* **SHADING**: Expected values are |
|
* **SHADING_FLAT** |
|
* **SHADING_GOURAUD** |
|
* **SHADING_PHONG** |
|
|
|
viz::Viz3d::setDesiredUpdateRate |
|
-------------------------------- |
|
Sets desired update rate of the window. |
|
|
|
.. ocv:function:: void setDesiredUpdateRate(double rate) |
|
|
|
:param rate: Desired update rate. The default is 30. |
|
|
|
viz::Viz3d::getDesiredUpdateRate |
|
-------------------------------- |
|
Returns desired update rate of the window. |
|
|
|
.. ocv:function:: double getDesiredUpdateRate() |
|
|
|
viz::Viz3d::setRepresentation |
|
----------------------------- |
|
Sets geometry representation of the widgets to surface, wireframe or points. |
|
|
|
.. ocv:function:: void setRepresentation(int representation) |
|
|
|
:param representation: Geometry representation which can be one of the following: |
|
|
|
* **REPRESENTATION_POINTS** |
|
* **REPRESENTATION_WIREFRAME** |
|
* **REPRESENTATION_SURFACE** |
|
|
|
viz::Color |
|
---------- |
|
.. ocv:class:: Color |
|
|
|
This class a represents BGR color. :: |
|
|
|
class CV_EXPORTS Color : public Scalar |
|
{ |
|
public: |
|
Color(); |
|
Color(double gray); |
|
Color(double blue, double green, double red); |
|
|
|
Color(const Scalar& color); |
|
|
|
static Color black(); |
|
static Color blue(); |
|
static Color green(); |
|
static Color cyan(); |
|
|
|
static Color red(); |
|
static Color magenta(); |
|
static Color yellow(); |
|
static Color white(); |
|
|
|
static Color gray(); |
|
}; |
|
|
|
viz::Mesh3d |
|
----------- |
|
.. ocv:class:: Mesh3d |
|
|
|
This class wraps mesh attributes, and it can load a mesh from a ``ply`` file. :: |
|
|
|
class CV_EXPORTS Mesh3d |
|
{ |
|
public: |
|
|
|
Mat cloud, colors; |
|
Mat polygons; |
|
|
|
//! Loads mesh from a given ply file |
|
static Mesh3d loadMesh(const String& file); |
|
|
|
private: |
|
/* hidden */ |
|
}; |
|
|
|
viz::Mesh3d::loadMesh |
|
--------------------- |
|
Loads a mesh from a ``ply`` file. |
|
|
|
.. ocv:function:: static Mesh3d loadMesh(const String& file) |
|
|
|
:param file: File name. |
|
|
|
|
|
viz::KeyboardEvent |
|
------------------ |
|
.. ocv:class:: KeyboardEvent |
|
|
|
This class represents a keyboard event. :: |
|
|
|
class CV_EXPORTS KeyboardEvent |
|
{ |
|
public: |
|
enum { ALT = 1, CTRL = 2, SHIFT = 4 }; |
|
enum Action { KEY_UP = 0, KEY_DOWN = 1 }; |
|
|
|
KeyboardEvent(Action action, const String& symbol, unsigned char code, int modifiers); |
|
|
|
Action action; |
|
String symbol; |
|
unsigned char code; |
|
int modifiers; |
|
}; |
|
|
|
viz::KeyboardEvent::KeyboardEvent |
|
--------------------------------- |
|
Constructs a KeyboardEvent. |
|
|
|
.. ocv:function:: KeyboardEvent (Action action, const String& symbol, unsigned char code, Modifiers modifiers) |
|
|
|
:param action: Signals if key is pressed or released. |
|
:param symbol: Name of the key. |
|
:param code: Code of the key. |
|
:param modifiers: Signals if ``alt``, ``ctrl`` or ``shift`` are pressed or their combination. |
|
|
|
|
|
viz::MouseEvent |
|
--------------- |
|
.. ocv:class:: MouseEvent |
|
|
|
This class represents a mouse event. :: |
|
|
|
class CV_EXPORTS MouseEvent |
|
{ |
|
public: |
|
enum Type { MouseMove = 1, MouseButtonPress, MouseButtonRelease, MouseScrollDown, MouseScrollUp, MouseDblClick } ; |
|
enum MouseButton { NoButton = 0, LeftButton, MiddleButton, RightButton, VScroll } ; |
|
|
|
MouseEvent(const Type& type, const MouseButton& button, const Point& pointer, int modifiers); |
|
|
|
Type type; |
|
MouseButton button; |
|
Point pointer; |
|
int modifiers; |
|
}; |
|
|
|
viz::MouseEvent::MouseEvent |
|
--------------------------- |
|
Constructs a MouseEvent. |
|
|
|
.. ocv:function:: MouseEvent (const Type& type, const MouseButton& button, const Point& p, Modifiers modifiers) |
|
|
|
:param type: Type of the event. This can be **MouseMove**, **MouseButtonPress**, **MouseButtonRelease**, **MouseScrollDown**, **MouseScrollUp**, **MouseDblClick**. |
|
:param button: Mouse button. This can be **NoButton**, **LeftButton**, **MiddleButton**, **RightButton**, **VScroll**. |
|
:param p: Position of the event. |
|
:param modifiers: Signals if ``alt``, ``ctrl`` or ``shift`` are pressed or their combination. |
|
|
|
viz::Camera |
|
----------- |
|
.. ocv:class:: Camera |
|
|
|
This class wraps intrinsic parameters of a camera. It provides several constructors |
|
that can extract the intrinsic parameters from ``field of view``, ``intrinsic matrix`` and |
|
``projection matrix``. :: |
|
|
|
class CV_EXPORTS Camera |
|
{ |
|
public: |
|
Camera(float f_x, float f_y, float c_x, float c_y, const Size &window_size); |
|
Camera(const Vec2f &fov, const Size &window_size); |
|
Camera(const cv::Matx33f &K, const Size &window_size); |
|
Camera(const cv::Matx44f &proj, const Size &window_size); |
|
|
|
inline const Vec2d & getClip() const { return clip_; } |
|
inline void setClip(const Vec2d &clip) { clip_ = clip; } |
|
|
|
inline const Size & getWindowSize() const { return window_size_; } |
|
void setWindowSize(const Size &window_size); |
|
|
|
inline const Vec2f & getFov() const { return fov_; } |
|
inline void setFov(const Vec2f & fov) { fov_ = fov; } |
|
|
|
inline const Vec2f & getPrincipalPoint() const { return principal_point_; } |
|
inline const Vec2f & getFocalLength() const { return focal_; } |
|
|
|
void computeProjectionMatrix(Matx44f &proj) const; |
|
|
|
static Camera KinectCamera(const Size &window_size); |
|
|
|
private: |
|
/* hidden */ |
|
}; |
|
|
|
viz::Camera::Camera |
|
------------------- |
|
Constructs a Camera. |
|
|
|
.. ocv:function:: Camera(float f_x, float f_y, float c_x, float c_y, const Size &window_size) |
|
|
|
:param f_x: Horizontal focal length. |
|
:param f_y: Vertical focal length. |
|
:param c_x: x coordinate of the principal point. |
|
:param c_y: y coordinate of the principal point. |
|
:param window_size: Size of the window. This together with focal length and principal point determines the field of view. |
|
|
|
.. ocv:function:: Camera(const Vec2f &fov, const Size &window_size) |
|
|
|
:param fov: Field of view (horizontal, vertical) |
|
:param window_size: Size of the window. |
|
|
|
Principal point is at the center of the window by default. |
|
|
|
.. ocv:function:: Camera(const cv::Matx33f &K, const Size &window_size) |
|
|
|
:param K: Intrinsic matrix of the camera. |
|
:param window_size: Size of the window. This together with intrinsic matrix determines the field of view. |
|
|
|
.. ocv:function:: Camera(const cv::Matx44f &proj, const Size &window_size) |
|
|
|
:param proj: Projection matrix of the camera. |
|
:param window_size: Size of the window. This together with projection matrix determines the field of view. |
|
|
|
viz::Camera::computeProjectionMatrix |
|
------------------------------------ |
|
Computes projection matrix using intrinsic parameters of the camera. |
|
|
|
.. ocv:function:: void computeProjectionMatrix(Matx44f &proj) const |
|
|
|
:param proj: Output projection matrix. |
|
|
|
viz::Camera::KinectCamera |
|
------------------------- |
|
Creates a Kinect Camera. |
|
|
|
.. ocv:function:: static Camera KinectCamera(const Size &window_size) |
|
|
|
:param window_size: Size of the window. This together with intrinsic matrix of a Kinect Camera determines the field of view.
|
|
|