math.pi

Constant

math.pi -- 3.1415926535898

Represents the ratio of a circle's circumference to its diameter.

Examples

Print the value of pi

engine.print("info", math.pi) -- 3.1415926535898

Compute the circumference of a circle

local radius = 5
local circumference = 2 * math.pi * radius

engine.print("info", circumference) -- 31.415926535898

Compute the area of a circle

local radius = 3
local area = math.pi * radius * radius

engine.print("info", area) -- 28.274333882308

Generate a full circle of evenly spaced points

local point_count = 8

for i = 0, point_count - 1 do
    local angle = 2 * math.pi * i / point_count
    local pos_x = math.cos(angle)
    local pos_y = math.sin(angle)
    engine.print("info", pos_x, pos_y)
end

Compute the volume of a sphere

local radius = 4
local volume = (4 / 3) * math.pi * radius * radius * radius

engine.print("info", volume) -- 268.08257310942

Convert 180 degrees to radians using pi directly

local radians = math.pi

engine.print("info", radians) -- 3.1415926535898

Constant

Examples

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