The PathData class provides an object-oriented way to produce an SVG path. Each of the methods corresponds to a path command. Construct a path by calling one or more methods. The path object can be passed as an argument to the RVG::ShapeConstructors#path method.
Add an arc command. If abs is true the coordinates are absolute, otherwise the coordinates are relative.
# File lib/rvg/pathdata.rb, line 123 def arc(abs, rx, ry, x_axis_rotation, large_arc_flag, sweep_flag, x, y) @path << sprintf("%s%g,%g %g %d %d %g,%g ", (abs ? 'A' : 'a'), rx, ry, x_axis_rotation, large_arc_flag, sweep_flag, x, y) end
Add a closepath command. The abs argument is ignored.
# File lib/rvg/pathdata.rb, line 52 def closepath(abs=true) @path << 'Z' # ignore `abs' end
Add a curveto (cubic Bezier) command. If abs is true the coordinates are absolute, otherwise the coordinates are relative.
# File lib/rvg/pathdata.rb, line 84 def curveto(abs, x1, y1, x2, y2, x, y, *coords) @path << sprintf("%s%g,%g %g,%g %g,%g ", (abs ? 'C' : 'c'), x1, y1, x2, y2, x, y) # "multiple sets of coordinates may be specified to draw a polybezier" add_points(6, *coords) end
Add a horizontal lineto command. If abs is true the coordinates are absolute, otherwise the coordinates are relative.
# File lib/rvg/pathdata.rb, line 69 def hlineto(abs, x) @path << sprintf("%s%g ", (abs ? 'H' : 'h'), x) end
Add a lineto command. Any number of x,y coordinate pairs may be specified. If abs is true the coordinates are absolute, otherwise the coordinates are relative.
# File lib/rvg/pathdata.rb, line 60 def lineto(abs, x, y, *coords) @path << sprintf("%s%g,%g ", (abs ? 'L' : 'l'), x, y) # "a number of coordinate pairs may be specified to draw a polyline" add_points(2, *coords) end
Add a moveto command. If abs is true the coordinates are absolute, otherwise the coordinates are relative.
# File lib/rvg/pathdata.rb, line 44 def moveto(abs, x, y, *coords) @path << sprintf("%s%g,%g ", (abs ? 'M' : 'm'), x, y) # "subsequent pairs are treated as implicit lineto commands" add_points(2, *coords) end
Add a quadratic Bezier curveto command. If abs is true the coordinates are absolute, otherwise the coordinates are relative.
# File lib/rvg/pathdata.rb, line 104 def quadratic_curveto(abs, x1, y1, x, y, *coords) @path << sprintf("%s%g,%g %g,%g ", (abs ? 'Q' : 'q'), x1, y1, x, y) add_points(4, *coords) end
Add a smooth curveto (cubic Bezier) command. If abs is true the coordinates are absolute, otherwise the coordinates are relative.
# File lib/rvg/pathdata.rb, line 94 def smooth_curveto(abs, x2, y2, x, y, *coords) @path << sprintf("%s%g,%g %g,%g ", (abs ? 'S' : 's'), x2, y2, x, y) # "multiple sets of coordinates may be specified to draw a polybezier" add_points(4, *coords) end
Add a smooth quadratic Bezier curveto command. If abs is true the coordinates are absolute, otherwise the coordinates are relative.
# File lib/rvg/pathdata.rb, line 113 def smooth_quadratic_curveto(abs, x, y, *coords) @path << sprintf("%s%g,%g ", (abs ? 'T' : 't'), x, y) add_points(2, *coords) end
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