Displays circular arcs in a window.
disp_arc displays one or several circular arcs in the current output window. An arc is described by its center point (CenterRow,CenterCol), the angle between start and end of the arc (Angle in radians) and the first point of the arc (BeginRow,BeginCol). The arc is displayed in clockwise direction. The parameters for output can be determined - as with the output of regions - with the procedures set_color, set_grey, set_draw, etc. The output window is set with the procedure set_window. It is possible to draw several arcs with one call by using tupel parameters. For the use of colors with several arcs, see set_color.
The center point has to be within the window. The radius of the arc has be at least 2 pixel.
CenterRow (input_control) |
arc.center.y -> real / integer |
row coordinate of center point. | |
Default value: 64 | |
Suggested values: 0, 64, 128, 256 | |
Range of values: 0 <= CenterRow <= 511 (lin) | |
Minimum increment: 1 | |
Recommended increment: 1 |
CenterCol (input_control) |
arc.center.x -> real / integer |
column coordinate of center point. | |
Default value: 64 | |
Suggested values: 0, 64, 128, 256 | |
Range of values: 0 <= CenterCol <= 511 (lin) | |
Minimum increment: 1 | |
Recommended increment: 1 |
Angle (input_control) |
arc.angle.rad -> real / integer |
angle between start and end of the arc (in radians). | |
Default value: 3.1415926 | |
Suggested values: 0.0, 0.785398, 1.570796, 3.1415926, 6.283185 | |
Range of values: 0.0 <= Angle <= 6.283185 (lin) | |
Minimum increment: 0.01 | |
Recommended increment: 0.1 | |
Restriction: Angle > 0.0 |
BeginRow (input_control) |
arc.begin.y(-array) -> integer / real |
row coordinate of the start of the arc. | |
Default value: 32 | |
Suggested values: 0, 64, 128, 256 | |
Range of values: 0 <= BeginRow <= 511 (lin) | |
Minimum increment: 1 | |
Recommended increment: 1 |
BeginCol (input_control) |
arc.begin.x(-array) -> integer / real |
column coordinate of the start of the arc. | |
Default value: 32 | |
Suggested values: 0, 64, 128, 256 | |
Range of values: 0 <= BeginCol <= 511 (lin) | |
Minimum increment: 1 | |
Recommended increment: 1 |
open_window(::0,0,-1,-1,'root','visible','':) > set_draw(::'fill':) > set_color(::'white':) > set_insert(::'not':) > Row = 100 > Column = 100 > disp_arc(::Row,Column,3.14,Row+10,Column+10:) > close_window(:::).
disp_arc returns TRUE, if a window is activated. Otherwise an exception is raised.
open_window, set_draw, set_color, set_colored, set_line_width, set_rgb, set_hsi, set_window
disp_circle, disp_ellipse, disp_region, circle, ellipse
open_window, open_textwindow, set_color, set_draw, set_rgb, set_hsi, set_window