SG四角形で登場

script.lua

--track0:width,0,9999,40
--track1:height,0,9999,60
--track2:padding,-9999,9999,5
--track3:holding time(s),0,9999,1
local COLORS = { 0x000000, 0xffffff }
local DIRECTIONS = { "left", "right", "up", "down" }
local SPEED = 300

if chars == null then
  chars = {}
end

debug_print(string.format("index = %d",obj.index))
if chars[obj.index] == null then
  chars[obj.index] = { direction = DIRECTIONS[math.floor(obj.rand(1, #DIRECTIONS))], color = COLORS[math.floor(obj.rand(1, #COLORS))] }
end

local w, h = obj.getpixel()
local width, height, pad, holdingtime = obj.track0, obj.track1, obj.track2, obj.track3
local time = math.max(obj.time - holdingtime, 0)
local entrytime = 0.5 - obj.time
local dx = obj.ox + obj.index * (width + pad) - width / 2
local dy = obj.oy - height / 2

if entrytime < 0 then
  obj.draw(obj.index * (width + pad), 0)
end

obj.load("figure", "四角形", chars[obj.index].color, 1)
local direction = chars[obj.index].direction
local left, right, top, bottom = dx, dx + width, dy, dy + height
if direction == "left" then
  if entrytime > 0 then
    left, right = dx - entrytime * SPEED / 4, dx + width - entrytime * SPEED
  else
    left, right = dx + time * SPEED, dx + width + time * SPEED / 4
  end
  right = math.max(left, right)
elseif direction == "right" then
  if entrytime > 0 then
    left, right = dx + entrytime * SPEED, dx + width + entrytime * SPEED / 4
  else
    left, right = dx - time * SPEED / 4, dx + width - time * SPEED
  end
  left = math.min(left, right)
elseif direction == "up" then
  if entrytime > 0 then
    top, bottom = dy + entrytime * SPEED, dy + height + entrytime * SPEED / 4
  else
    top, bottom = dy - time * SPEED / 4, dy + height - time * SPEED
  end
  bottom = math.max(top, bottom)
elseif direction == "down" then
  if entrytime > 0 then
    top, bottom = dy - entrytime * SPEED / 4, dy + height - entrytime * SPEED
  else
    top, bottom = dy + time * SPEED, dy + height + time * SPEED / 4
  end
  top = math.min(top, bottom)
end
obj.drawpoly(left, top, 0, right, top, 0, right, bottom, 0, left, bottom, 0)