Globals: Viewport Info

Viewport Info

The viewport info global returns information about the state of Layout's OpenGL viewports. The data is read-only, but you can set the parameters using navigation and display commands.

Global Call

   LWViewportInfo *vpinfo;
   vpinfo = global( LWVIEWPORTINFO_GLOBAL, GFUSE_TRANSIENT );

   typedef struct st_LWViewportInfo {
        int               numViewports;
        int             (*type)  (int);
        unsigned int    (*flags) (int);
        void            (*pos)   (int, LWDVector);
        void            (*xfrm)  (int, double mat[9]);
        void            (*clip)  (int, double *hither, double *yon);
        void            (*rect)  (int, int *left, int *top, int *width, int *height);
   } LWViewportInfo;

numViewports

The number of viewports visible in the Layout interface.

view = type( i )

The type of view in the i^th viewport. It will be one of the following:

LVVIEWT_NONE

LVVIEWT_TOP

LVVIEWT_BOTTOM

LVVIEWT_BACK

LVVIEWT_FRONT

LVVIEWT_RIGHT

LVVIEWT_LEFT

LVVIEWT_PERSPECTIVE

LVVIEWT_LIGHT

LVVIEWT_CAMERA

LVVIEWT_SCHEMATIC

 

 
 
 

flags = flags( i )

Returns a set of bit flags for the  i^th viewport. These can be any combination of the following. 

LWVIEWF_CENTER
LWVIEWF_WEIGHTSHADE
LWVIEWF_XRAY

pos(i, spot)

Fills the spot vector with the viewing position of the  i^th viewport.

xfrm( i, mat[9] )

Fills mat with a 3x3 transformation from world coordinates to viewport cordinates for the  i^th viewport.

clip( i, &hither, &yon )

Fills hither and yon with the near and far Z clipping distances for the  i^th viewport. 

 

rect( i, &left, &top, &width, &height )

Fills left, top, width and height with pixel coordinates of the  i^th viewport.