dtk_create_circle(3) [debian man page]

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)

DTK_CREATE_SHAPE(3)						Draw Toolkit manual					       DTK_CREATE_SHAPE(3)

NAME

       dtk_create_shape - Create and modify custom shape

SYNOPSIS

       #include <drawtk.h>

       dtk_hshape dtk_create_shape(dtk_hshape shp,
		       unsigned int ind_num, const float *vertex_array,
		       int filled, const float *color);

DESCRIPTION

       dtk_create_shape()  creates  a shape specified by ind_num vertices referenced by vertex_array. In this array, the position parameters (x,y)
       of  each  vertex  are  packed  together	and  the  list	should	ordered,  so  that  the  array	 is   filled   in   the   following   way:
       x0,y0,x1,y1,x2,y2,...,xN,yN.

       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.
	  In the case of filled polygon request, the last point specified in vertex_array will be connected with the first one.

	* 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_SHAPE(3)