CANVAS:stroke arc

February 22, 2021 16:37

CANVAS:stroke_arc(x, y, radius_x, radius_y, start, end, rotation, color)

Draw a stroked arc defined by the center position (x,y), with x radius radius_x, y radius radius_y, start and end angles (start, end), rotation angle rotation, and with the color color.

It fills the shape you get by connecting each end of the arc to the center of the ellipse with a straight line.

Parameters:

x	The x position of the center of the arc
y	The y position of the center of the arc
radius_x	The radius in the x direction
radius_y	The radius in the y direction
start	The start angle of the arc in degrees clockwise from the positive x axis
end	The end angle of the arc in degrees clockwise from the positive x axis
rotation	The rotation angle in degrees clockwise
color	An RGB color value as an integer value

Example:

-- Draw a dashed circle on the canvas with the color red
function DashedCircle(name)
  local canvas = gre.get_canvas(name)
  local size = canvas:get_dimensions()
  local x = size.width / 2
  local y = size.height / 2
  local r = size.width / 6
  canvas:set_line_width(0.1 * r)
  for a = 0, 330, 30 do
    canvas:stroke_arc(x, y, r, r, a, a + 20, 0, 0xff2244)
  end
end