PointCloudPicker Class Reference

Implementation of picking points from a point cloud. More...

#include <easy3d/gui/picker_point_cloud.h>

Inheritance diagram for PointCloudPicker:

Public Member Functions
	PointCloudPicker (const Camera *cam)
	Constructor.
unsigned int	resolution () const
	Returns the picker resolution (in pixels).
void	set_resolution (unsigned int r)
	Sets the picker resolution (in pixels).
PointCloud::Vertex	pick_vertex (PointCloud *model, int x, int y)
	Pick vertex at a given screen location.
void	pick_vertices (PointCloud *model, const Rect &rect, bool deselect)
	Pick vertices of a point cloud by a rectangle. The selected vertices will be marked in vertex property "v:select".
void	pick_vertices (PointCloud *model, const Polygon2 &plg, bool deselect)
	Pick vertices of a point cloud by a polygon/lasso. The selected vertices will be marked in vertex property "v:select".
Public Member Functions inherited from Picker
	Picker (const Camera *cam)
	Constructor.
virtual	~Picker ()
	Destructor.
const Camera *	camera () const
	Returns the pointer of the camera.
Line3	picking_line (int x, int y) const
	Construct a picking line.
vec3	picking_dir (int x, int y) const
	The picking direction, pointing inside the screen.
vec3	project (const vec3 &p) const
	Project a 3D point in the world coordinate system onto the 2D screen coordinate system.
vec3	unproject (int x, int y, float depth) const
	Compute the world coordinates of a point defined in the screen coordinate system.
void	screen_to_opengl (int x, int y, int &gl_x, int &gl_y, int width, int height) const
	Convert a point expressed in the screen coordinate system (with an origin in the upper left corner) into the OpenGL coordinate system (with an origin in the lower left corner). The high DPI scaling is also taken into consideration, so the result always corresponds to its image pixel.

Detailed Description

Implementation of picking points from a point cloud.

See also

Picker, ModelPicker, SurfaceMeshPicker

Examples

Tutorial_403_PointSelection/main.cpp.

Constructor & Destructor Documentation

PointCloudPicker()

PointCloudPicker ( const Camera * cam )

explicit

Constructor.

Parameters

cam	The camera used for picking.

Member Function Documentation

pick_vertex()

PointCloud::Vertex pick_vertex	(	PointCloud *	model,
		int	x,
		int	y )

Pick vertex at a given screen location.

Parameters

model	The point cloud model.
x	The x coordinate of the screen point.
y	The y coordinate of the screen point.

Returns

The picked vertex.

pick_vertices() [1/2]

void pick_vertices	(	PointCloud *	model,
		const Polygon2 &	plg,
		bool	deselect )

Pick vertices of a point cloud by a polygon/lasso. The selected vertices will be marked in vertex property "v:select".

Parameters

model	The point cloud model.
plg	The polygon region.
deselect	True to perform an inverse operation.

pick_vertices() [2/2]

void pick_vertices	(	PointCloud *	model,
		const Rect &	rect,
		bool	deselect )

Pick vertices of a point cloud by a rectangle. The selected vertices will be marked in vertex property "v:select".

Parameters

model	The point cloud model.
rect	The rectangle region.
deselect	True to perform an inverse operation.

resolution()

unsigned int resolution ( ) const

inline

Returns the picker resolution (in pixels).

The picker resolution indicates the sensitivity of picking a point. It is used only for the CPU implementation of picking a single point.

Returns

The picker resolution in pixels.

set_resolution()

void set_resolution ( unsigned int r )

inline

Sets the picker resolution (in pixels).

The picker resolution indicates the sensitivity of picking a point. It is used only for the CPU implementation of picking a single point.

Parameters

r	The new picker resolution in pixels.

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The documentation for this class was generated from the following files:

• G:/3_code/Easy3D/easy3d/gui/picker_point_cloud.h
• G:/3_code/Easy3D/easy3d/gui/picker_point_cloud.cpp