DTK_CREATE_CIRCLE(3)						Draw Toolkit manual					      DTK_CREATE_CIRCLE(3)

NAME

       dtk_create_circle - Create and modify circular shape

SYNOPSIS

       #include <drawtk.h>

       dtk_hshape dtk_create_circle(dtk_hshape shp,
		       float cx, float cy, float r, int filled,
		       const float *color, unsigned int numpoints);

DESCRIPTION

       dtk_create_circle() creates an approximation of a circle of radius r centered at (cx,cy) using num_points vertices.

       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)

EPFL
								       2011						      DTK_CREATE_CIRCLE(3)