arc_properties — description of the Arc entity properties
The Arc entity is a leaf of the graphics entities hierarchy. This entity defines the parameters for ellipses and part of ellipses and the filled ones.
This field contains the handle of the parent. The parent of
the arc entity should be of the type "Axes" or
"Compound".
This property contains a vector with the
children of the handle. However,
arc handles currently do not have any
children.
This property is a positive real specifying the line width
in pixels. The displayed width is actually determined by rounding the supplied width
to the nearest integer. The only exception is vectorial export where the whole thickness
value is considered.
The line_style property value should be an integer in
[0 8]. 0 and 1 stands for solid, the other value stands for a selection of
dashes (see getlinestyle).
This property allows to display or not the line representing
the arc. The value must be "on" or
"off".
If fill_mode property value is
"on" , the arc is filled with the
background color.
This field contains the default foreground
property value used to draw the outside of the arc. It should be a color
index (relative to the current colormap).
This field contains the color used to fill the arc. It should be a color index (relative to the current colormap).
This property is to return the coordinates of the upper-left
point, the width and the height of the inclosing rectangle as well
as the boundary angles of the sector. It is the matrix in user coordinates
[xleft,yup,[zup],width,height,a1,a2] where
a1 and a2 are the sector
boundary angles in degree.
Warning: in Scilab versions
up to 4.1.2 a1 and a2 were given in
degree/64.
This field contains the visible property
value for the entity . It should be "on" or
"off". If "on" the arc is
drawn, If "off" the arc is not displayed on the
screen.
This field controls the kind of discretisation used to render
the arc. Its value must be either "nurbs" or
"lines". If "nurbs" is
selected then the arc is rendered using nurbs curves and surfaces.
This results in the display of a perfect ellipse part whatever the
view point is. If "lines" is selected then the
arc is approximated with a constant number of lines. This reduce
drawing time but some sharp edges may appear upon zooming. The use
of "lines" value is discouraged and should only
be used if a loss in framerate is noticed when using
"nurbs" value.
This field contains the clip_state property
value for the arc. Clip_state value should be :
"off" this means that the arc is not
clipped
"clipgrf" this means that the arc is
clipped outside the Axes box.
"on" this means that the arc is clipped
outside the arc given by property clip_box.
This field is to determinate the clip_box
property. By Default its value should be an empty matrix if
clip_state is "off". Other cases the vector
[x,y,w,h] (upper-left point width height) defines
the portions of the arc to display, however
clip_state property value will be changed.
This field can be use to store any scilab variable in the arc data structure, and to retreive it.
a=get("current_axes");//get the handle of the newly created axes
a.data_bounds=[-2,-2;2,2];
xarc(-1.5,1.5,3,3,0,360*64)
arc=get("hdl"); //get handle on current entity (here the arc entity)
arc.fill_mode="on";
arc.foreground=5;
arc.data(:,[3 6])=[2 270*64];
xfarc(-.5,1,.4,.6,0,360*64);
arc.visible="off";