class PickingObject

class that implements a basic routine for picking one item from a given OpenGL display list

Inheritance:

Public

	constructors PickingObject () build a picking Object
	destructor virtual ~PickingObject () delete a PickingObject

Protected Fields

GLuint

pickingBuffer [_pickingBufferSize] the selection buffer used to pick items

Protected Methods

int	doPicking (GLuint displayList, const Vec2 &pixel, Camera3D *cam, double areaSize) returns the reference of a selected item after OpenGL picking

GLuint pickingBuffer[_pickingBufferSize]

the selection buffer used to pick items

int doPicking(GLuint displayList, const Vec2 &pixel, Camera3D *cam, double areaSize)

returns the reference of a selected item after OpenGL picking

Returns:

-1 if no item has been selected or returns the reference of the selected item

Parameters:

displayList - an OpenGL display list using the name stack
pixel - the position in screen coordinate where the mouse button was pressed
cam - the camera where the selection is performed
areaSize - the half size in pixels of the area around the pixel where any item is searched

constructors

PickingObject()

build a picking Object

destructor

virtual ~PickingObject()

delete a PickingObject

alphabetic index hierarchy of classes

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