class grRender

Window system intarface

Public Methods

grRender()

Default constructor

void SetInitScene( grNode * n )

One-shot scene setting

void SetRunScene( grNode * n )

Rendering scene setting

void Render()

Run-time rendering

void Init()

Setup rendering

void PortSize( int & w, int & h )

Current window size

void ReadPixel( GLenum format, GLenum type, GLvoid * mem )

Read the frame-buffer

void PickNodes( int x, int y, double wx, double wy, grPickResult & pr )

Selection function

int PickInNode( int x, int y, double wx, double wy, grNode * node )

Selection function

bool Pick( int x, int y, double wx, double wy, grNode * & node, int & prim )

Selection function

void grViewAll( const grVertex3f & vert)

Camera set tool

void grViewAll( const Boxd & boundbox )

Camera set tool

void grViewAll( const Boxf & boundbox )

Camera set tool

BOOL OnCreate( void * hwnd )

create callback

void OnDestroy( void * hwnd )

destroy callback

void OnSize( void * hwnd, int w, int h )

resize callback

grRender()

Default constructor.

void SetInitScene( grNode * n )

One-shot scene setting. The user MAY use this function to setup the one-shot scene. The one-shot scene is renderend once during startup and contain all the general static settings.

void SetRunScene( grNode * n )

Rendering scene setting. The user MUST use this function to setup the rendering scene. The rendering scene is rendered multiple time for visualization porpouse.

void Render()

Run-time rendering. This callback must be used by the system framework to rendering the scene (i.e. by the OnDraw callback).

void Init()

Setup rendering. This callback must be used by the system framework to rendering the inizialization scene, after the SetInitScene function. (i.e. on InitialUpdate callback).

void PortSize( int & w, int & h )

Current window size. This function read the current window size.

Parameters:

w - width of the window.
h - height of the window

void ReadPixel( GLenum format, GLenum type, GLvoid * mem )

Read the frame-buffer. This function read the frame-buffer picture.

Parameters:

format - see opengl:glReadPixels for the list of formats
type - see opengl:glReadPixels for the list of types
mem - pointer of image memory (allocated by user!)

void PickNodes( int x, int y, double wx, double wy, grPickResult & pr )

Selection function. The user may use this function to implement the selection of a set of nodes.

Parameters:

x - horizontal mouse position
y - vertical size position
wx - x selection range (in pixel)
wy - y selection range (in pixel)
pr - set of nodes selected

See Also:

grPickResult

int PickInNode( int x, int y, double wx, double wy, grNode * node )

Selection function. The user may use this function to implement the selection of a particular primitive of the spefied node.

Returns:

the index of the selected node primive, -1 if none.

Parameters:

x - horizontal mouse position
y - vertical size position
wx - x selection range (in pixel)
wy - y selection range (in pixel)
pr - pointer of a selected node

bool Pick( int x, int y, double wx, double wy, grNode * & node, int & prim )

Selection function. The user may use this function to implement the selection of a single node.

Returns:

true if a node is selected, false otherwise

Parameters:

x - horizontal mouse position
y - vertical size position
wx - x selection range (in pixel)
wy - y selection range (in pixel)
node - the node selected
prim - index of the picked node primitive

void grViewAll( const grVertex3f & vert)

Camera set tool. This function set the current camera position for best viewing of the specified set of vertices.

void grViewAll( const Boxd & boundbox )

Camera set tool. This function set the current camera position for best viewing of the specified bonding box.

void grViewAll( const Boxf & boundbox )

Camera set tool. This function set the current camera position for best viewing of the specified bonding box.

BOOL OnCreate( void * hwnd )

create callback. This function must be called by the system framework after the window creation (i.e. on OnCreate callback )

Parameters:

hwnd - the current window handle

void OnDestroy( void * hwnd )

destroy callback. This function must be called by the system framework on the window destruction (i.e. on OnDestroy callback )

Parameters:

hwnd - the current window handle

void OnSize( void * hwnd, int w, int h )

resize callback. This function must be called by the system framework on window size or resize (i.e. on OnSize callback ).

Parameters:

hwnd - the current window handle
w - new window width
h - new window height

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