85 lines
2.4 KiB
Lua
85 lines
2.4 KiB
Lua
local tools = {}
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-- Get Table length
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function tools.table_length(T)
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local count = 0
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for _ in pairs(T) do count = count + 1 end
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return count
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end
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-- Pause system n seconds
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local clock = os.clock
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function tools.sleep(n) -- seconds
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local t0 = clock()
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while clock() - t0 <= n do end
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end
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-- Collision detection function
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function tools.check_circle_collision(circle1, circle2)
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local distance = math.sqrt((circle1.x - circle2.x) ^ 2 + (circle1.y - circle2.y) ^ 2)
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return distance <= circle1.radius + circle2.radius
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end
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-- Deep copy table
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function tools.clone_table(orig)
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local orig_type = type(orig)
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local copy
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if orig_type == 'table' then
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copy = {}
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for orig_key, orig_value in next, orig, nil do
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copy[tools.clone_table(orig_key)] = tools.clone_table(orig_value)
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end
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setmetatable(copy, tools.clone_table(getmetatable(orig)))
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else -- number, string, boolean, etc
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copy = orig
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end
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return copy
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end
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-- Print table
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function tools.print_r(t)
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local print_r_cache={}
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local function sub_print_r(t,indent)
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if (print_r_cache[tostring(t)]) then
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print(indent.."*"..tostring(t))
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else
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print_r_cache[tostring(t)]=true
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if (type(t)=="table") then
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for pos,val in pairs(t) do
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if (type(val)=="table") then
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print(indent.."["..pos.."] => "..tostring(t).." {")
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sub_print_r(val,indent..string.rep(" ",string.len(pos)+8))
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print(indent..string.rep(" ",string.len(pos)+6).."}")
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elseif (type(val)=="string") then
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print(indent.."["..pos..'] => "'..val..'"')
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else
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print(indent.."["..pos.."] => "..tostring(val))
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end
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end
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else
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print(indent..tostring(t))
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end
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end
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end
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if (type(t)=="table") then
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print(tostring(t).." {")
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sub_print_r(t," ")
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print("}")
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else
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sub_print_r(t," ")
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end
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print()
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end
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function tools.distance(x1, y1, x2, y2)
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local dx = x1 - x2
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local dy = y1 - y2
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return math.sqrt ( dx * dx + dy * dy )
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end
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function tools.circle_position(angle, radius, x_center, y_center)
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local angle_temp = angle * math.pi / 180
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return x_center + radius * math.cos(angle_temp), y_center + radius * math.sin(angle_temp)
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end
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return tools |