Ogre2SelectionBuffer Class Reference

Generates a selection buffer object for a given camera. The selection buffer is used of entity selection. On setup, a unique color is assigned to each entity. Whenever a selection request is made, the selection buffer camera renders to a 1x1 sized offscreen buffer. The color value of that pixel gives the identity of the entity. More...

#include <Ogre2SelectionBuffer.hh>

Public Member Functions
	Ogre2SelectionBuffer (const std::string &_cameraName, Ogre2ScenePtr _scene)
	Constructor. More...
	~Ogre2SelectionBuffer ()
	Destructor. More...
bool	ExecuteQuery (const int _x, const int _y, Ogre::Item *&_item, math::Vector3d &_point)
	Perform selection operation and get ogre item and point of intersection. More...
Ogre::Item *	OnSelectionClick (const int _x, const int _y)
	Handle on mouse click. More...
void	Update ()
	Call this to update the selection buffer contents. More...

Detailed Description

Generates a selection buffer object for a given camera. The selection buffer is used of entity selection. On setup, a unique color is assigned to each entity. Whenever a selection request is made, the selection buffer camera renders to a 1x1 sized offscreen buffer. The color value of that pixel gives the identity of the entity.

Constructor & Destructor Documentation

Ogre2SelectionBuffer()

Ogre2SelectionBuffer	(	const std::string &	_cameraName,
		Ogre2ScenePtr	_scene
	)

Constructor.

Parameters

[in]	_cameraName	Name of the camera to generate a selection buffer for.
[in]	_scene	Pointer to the scene

~Ogre2SelectionBuffer()

~Ogre2SelectionBuffer

(

)

Destructor.

Member Function Documentation

ExecuteQuery()

bool ExecuteQuery	(	const int	_x,
		const int	_y,
		Ogre::Item *&	_item,
		math::Vector3d &	_point
	)

Perform selection operation and get ogre item and point of intersection.

Parameters

[in]	_x	X coordinate in pixels.
[in]	_y	Y coordinate in pixels.
[out]	_item	Ogre item at the coordinate.
[out]	_point	3D point of intersection with the ogre item's mesh.

Returns

True if an ogre item is found, false otherwise

OnSelectionClick()

Ogre::Item* OnSelectionClick	(	const int	_x,
		const int	_y
	)

Handle on mouse click.

Parameters

[in]	_x	X coordinate in pixels.
[in]	_y	Y coordinate in pixels.

Returns

Returns the Ogre item at the coordinate.

Update()

void Update

(

)

Call this to update the selection buffer contents.

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

• Ogre2SelectionBuffer.hh