314 lines
11 KiB
Lua
314 lines
11 KiB
Lua
local opts = {
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show_distance = true,
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show_coordinates = true,
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coordinates_space = "image",
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show_angles = "degrees",
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line_width = 2,
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dots_radius = 3,
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font_size = 36,
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line_color = "33",
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confirm_bindings = "MBTN_LEFT,ENTER",
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exit_bindings = "ESC",
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set_first_point_on_begin = false,
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clear_on_second_point_set = false,
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}
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local options = require 'mp.options'
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local msg = require 'mp.msg'
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local assdraw = require 'mp.assdraw'
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local state = 0 -- {0,1,2,3} = {inactive,setting first point,setting second point,done}
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local first_point = nil -- in normalized video space coordinates
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local second_point = nil -- in normalized video space coordinates
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local video_dimensions_stale = false
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function split(input)
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local ret = {}
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for str in string.gmatch(input, "([^,]+)") do
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ret[#ret + 1] = str
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end
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return ret
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end
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local confirm_bindings = split(opts.confirm_bindings)
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local exit_bindings = split(opts.exit_bindings)
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options.read_options(opts, nil, function()
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if state ~= 0 then
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remove_bindings()
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end
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confirm_bindings = split(opts.confirm_bindings)
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exit_bindings = split(opts.exit_bindings)
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if state ~= 0 then
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add_bindings()
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mark_stale()
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end
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end)
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function draw_ass(ass)
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local ww, wh = mp.get_osd_size()
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mp.set_osd_ass(ww, wh, ass)
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end
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function cursor_video_space_normalized(dim)
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local mx, my = mp.get_mouse_pos()
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local ret = {}
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ret[1] = (mx - dim.ml) / (dim.w - dim.ml - dim.mr)
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ret[2] = (my - dim.mt) / (dim.h - dim.mt - dim.mb)
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return ret
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end
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function refresh()
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if not video_dimensions_stale then return end
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video_dimensions_stale = false
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local dim = mp.get_property_native("osd-dimensions")
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local out_params = mp.get_property_native("video-out-params")
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if not dim or not out_params then
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draw_ass("")
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return
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end
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local vid_width = out_params.dw
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local vid_height = out_params.dh
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function video_space_normalized_to_video(point)
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local ret = {}
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ret[1] = point[1] * vid_width
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ret[2] = point[2] * vid_height
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return ret
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end
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function video_space_normalized_to_screen(point)
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local ret = {}
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ret[1] = point[1] * (dim.w - dim.ml - dim.mr) + dim.ml
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ret[2] = point[2] * (dim.h - dim.mt - dim.mb) + dim.mt
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return ret
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end
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local line_start = {}
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local line_end = {}
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if second_point then
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line_start.image = video_space_normalized_to_video(first_point)
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line_start.screen = video_space_normalized_to_screen(first_point)
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line_end.image = video_space_normalized_to_video(second_point)
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line_end.screen = video_space_normalized_to_screen(second_point)
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elseif first_point then
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line_start.image = video_space_normalized_to_video(first_point)
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line_start.screen = video_space_normalized_to_screen(first_point)
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line_end.image = video_space_normalized_to_video(cursor_video_space_normalized(dim))
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line_end.screen = {}
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line_end.screen[1], line_end.screen[2] = mp.get_mouse_pos()
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else
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local mx, my = mp.get_mouse_pos()
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line_start.image = video_space_normalized_to_video(cursor_video_space_normalized(dim))
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line_start.screen = {}
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line_start.screen[1], line_start.screen[2] = mp.get_mouse_pos()
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line_end = line_start
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end
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local distinct = (math.abs(line_start.screen[1] - line_end.screen[1]) >= 1
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or math.abs(line_start.screen[2] - line_end.screen[2]) >= 1)
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local a = assdraw:ass_new()
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local draw_setup = function(bord)
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a:new_event()
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a:pos(0,0)
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a:append("{\\bord" .. bord .. "}")
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a:append("{\\shad0}")
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local r = opts.line_color
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a:append("{\\3c&H".. r .. r .. r .. "&}")
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a:append("{\\1a&HFF}")
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a:append("{\\2a&HFF}")
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a:append("{\\3a&H00}")
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a:append("{\\4a&HFF}")
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a:draw_start()
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end
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local dot = function(pos, size)
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draw_setup(size)
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a:move_to(pos[1], pos[2]-0.5)
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a:line_to(pos[1], pos[2]+0.5)
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end
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local line = function(from, to, size)
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draw_setup(size)
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a:move_to(from[1], from[2])
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a:line_to(to[1], to[2])
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end
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if distinct then
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dot(line_start.screen, opts.dots_radius)
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line(line_start.screen, line_end.screen, opts.line_width)
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dot(line_end.screen, opts.dots_radius)
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else
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dot(line_start.screen, opts.dots_radius)
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end
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local line_info = function()
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if not opts.show_distance then return end
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a:new_event()
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a:append("{\\fs36}{\\bord1}")
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a:pos((line_start.screen[1] + line_end.screen[1]) / 2, (line_start.screen[2] + line_end.screen[2]) / 2)
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local an = 1
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if line_start.image[1] < line_end.image[1] then an = an + 2 end
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if line_start.image[2] < line_end.image[2] then an = an + 6 end
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a:an(an)
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local image = math.sqrt(math.pow(line_start.image[1] - line_end.image[1], 2) + math.pow(line_start.image[2] - line_end.image[2], 2))
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local screen = math.sqrt(math.pow(line_start.screen[1] - line_end.screen[1], 2) + math.pow(line_start.screen[2] - line_end.screen[2], 2))
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if opts.coordinates_space == "both" then
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a:append(string.format("image: %.1f\\Nscreen: %.1f", image, screen))
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elseif opts.coordinates_space == "image" then
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a:append(string.format("%.1f", image))
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elseif opts.coordinates_space == "window" then
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a:append(string.format("%.1f", screen))
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end
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end
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local dot_info = function(pos, opposite)
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if not opts.show_coordinates then return end
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a:new_event()
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a:append("{\\fs" .. opts.font_size .."}{\\bord1}")
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a:pos(pos.screen[1], pos.screen[2])
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local an
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if distinct then
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an = 1
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if line_start.image[1] > line_end.image[1] then an = an + 2 end
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if line_start.image[2] < line_end.image[2] then an = an + 6 end
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else
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an = 7
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end
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if opposite then
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an = 9 + 1 - an
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end
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a:an(an)
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if opts.coordinates_space == "both" then
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a:append(string.format("image: %.1f, %.1f\\Nscreen: %i, %i",
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pos.image[1], pos.image[2], pos.screen[1], pos.screen[2]))
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elseif opts.coordinates_space == "image" then
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a:append(string.format("%.1f, %.1f", pos.image[1], pos.image[2]))
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elseif opts.coordinates_space == "window" then
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a:append(string.format("%i, %i", pos.screen[1], pos.screen[2]))
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end
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end
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dot_info(line_start, true)
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if distinct then
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line_info()
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dot_info(line_end, false)
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end
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if distinct and opts.show_angles ~= "no" then
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local dist = 50
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local pos_from_angle = function(mult, angle)
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return {
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line_start.screen[1] + mult * dist * math.cos(angle),
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line_start.screen[2] + mult * dist * math.sin(angle),
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}
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end
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local extended = { line_start.screen[1], line_start.screen[2] }
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if line_end.screen[1] > line_start.screen[1] then
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extended[1] = extended[1] + dist
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else
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extended[1] = extended[1] - dist
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end
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line(line_start.screen, extended, math.max(0, opts.line_width-0.5))
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local angle = math.atan(math.abs(line_start.image[2] - line_end.image[2]) / math.abs(line_start.image[1] - line_end.image[1]))
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local fix_angle
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local an
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if line_end.image[2] < line_start.image[2] and line_end.image[1] > line_start.image[1] then
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-- upper-right
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an = 4
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fix_angle = function(angle) return - angle end
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elseif line_end.image[2] < line_start.image[2] then
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-- upper-left
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an = 6
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fix_angle = function(angle) return math.pi + angle end
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elseif line_end.image[1] < line_start.image[1] then
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-- bottom-left
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an = 6
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fix_angle = function(angle) return math.pi - angle end
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else
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-- bottom-right
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an = 4
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fix_angle = function(angle) return angle end
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end
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-- should implement this https://math.stackexchange.com/questions/873224/calculate-control-points-of-cubic-bezier-curve-approximating-a-part-of-a-circle
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local cp1 = pos_from_angle(1, fix_angle(angle*1/4))
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local cp2 = pos_from_angle(1, fix_angle(angle*3/4))
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local p2 = pos_from_angle(1, fix_angle(angle))
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a:bezier_curve(cp1[1], cp1[2], cp2[1], cp2[2], p2[1], p2[2])
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a:new_event()
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a:append("{\\fs" .. opts.font_size .."}{\\bord1}")
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local text_pos = pos_from_angle(1.1, fix_angle(angle*2/3)) -- you'd think /2 would make more sense, but *2/3 looks better
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a:pos(text_pos[1], text_pos[2])
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a:an(an)
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if opts.show_angles == "both" then
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a:append(string.format("%.2f\\N%.1f°", angle, angle / math.pi * 180))
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elseif opts.show_angles == "degrees" then
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a:append(string.format("%.1f°", angle / math.pi * 180))
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elseif opts.show_angles == "radians" then
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a:append(string.format("%.2f", angle))
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end
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end
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draw_ass(a.text)
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end
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function mark_stale()
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video_dimensions_stale = true
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end
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function add_bindings()
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mp.add_forced_key_binding("mouse_move", "ruler-mouse-move", mark_stale)
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for _, key in ipairs(confirm_bindings) do
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mp.add_forced_key_binding(key, "ruler-next-" .. key, next_step)
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end
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for _, key in ipairs(exit_bindings) do
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mp.add_forced_key_binding(key, "ruler-stop-" .. key, stop)
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end
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end
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function remove_bindings()
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for _, key in ipairs(confirm_bindings) do
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mp.remove_key_binding("ruler-next-" .. key)
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end
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for _, key in ipairs(exit_bindings) do
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mp.remove_key_binding("ruler-stop-" .. key)
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end
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mp.remove_key_binding("ruler-mouse-move")
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end
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function next_step()
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if state == 0 then
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state = 1
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mp.register_idle(refresh)
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mp.observe_property("osd-dimensions", nil, mark_stale)
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mark_stale()
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add_bindings()
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if opts.set_first_point_on_begin then
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next_step()
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end
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elseif state == 1 then
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local dim = mp.get_property_native("osd-dimensions")
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if not dim then return end
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state = 2
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first_point = cursor_video_space_normalized(dim)
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elseif state == 2 then
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local dim = mp.get_property_native("osd-dimensions")
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if not dim then return end
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state = 3
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second_point = cursor_video_space_normalized(dim)
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if opts.clear_on_second_point_set then
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next_step()
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end
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else
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stop()
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end
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end
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function stop()
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if state == 0 then return end
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mp.unregister_idle(refresh)
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mp.unobserve_property(mark_stale)
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remove_bindings()
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state = 0
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first_point = nil
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second_point = nil
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draw_ass("")
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end
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mp.add_key_binding(nil, "ruler", next_step)
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