trusty (3) dtk_create_arrow.3.gz

Provided by: libdrawtk-dev_2.0-2ubuntu1_amd64 bug

NAME
       dtk_create_arrow - Create and modify arrow shape


SYNOPSIS
       #include <drawtk.h>

       dtk_hshape dtk_create_arrow(dtk_hshape shp,
                       float cx, float cy, float width, float height,
                       int filled, const float *color);


DESCRIPTION
       dtk_create_arrow() creates an arrow pointing to the left with the pointed pointed located at (cx,cy) with
       a total width of width, a hat of length width/3 , a total height of height and  the  width  of  the  body
       being height/2.

       shp, filled and color have the same usage and meaning as for other shape creation function:

        * shp  can  be  used to modify a previously created shape. If it is non-null, the handle will be used to
          modify the shape referenced by shp: no new shape is created and the returned value is  ensured  to  be
          shp  in  case  of  success,  NULL otherwise. If shp is NULL, the function will attempt to create a new
          shape.

        * filled is set to 0 if the described shape should be a continuous line or a non-null value if the shape
          is supposed to be filled polygon.

        * color  should  point  to  a  4  float array containing a normalized RGBA value (i.e. each component is
          between 0.0 and 1.0).


RETURN VALUE
       In case of success these functions return the handle to the newly created or modified shape. If  the  shp
       argument is non-null, the handle returned is the same value. In case of error, NULL is returned.


SEE ALSO
       dtk_destroy_shape(3)