KCL Library ReferencestdmathPI

PIConstant in std::math

The value of pi, Archimedes’ constant (π).

PI: number(_?) = 3.14159265358979323846264338327950288_?

PI is a number and is technically a ratio, so you might expect it to have type number(_). However, PI is nearly always used for converting between different units - usually degrees to or from radians. Therefore, PI is treated a bit specially by KCL and always has unknown units. This means that if you use PI, you will need to give KCL some extra information about the units of numbers. Usually you should use type ascription on the result of calculations, e.g., (2 * PI): number(rad). You might prefer to use units::toRadians or units::toDegrees to convert between angles with different units.

Examples

circumference = 70

exampleSketch = startSketchOn(XZ)
 |> circle(center = [0, 0], radius = (circumference / (2 * PI)): number(mm))

example = extrude(exampleSketch, length = 5)

Rendered example of PI 0