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Mathf.PI

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マニュアルに切り替える
public static var PI: float;
public static float PI;

Description

円周率( 3.14159265358979... )(読み取り専用)

var radius : float = 5;

function Start() { var perimeter : float = 2 * Mathf.PI * radius; Debug.Log("The perimeter of the circle is: " + perimeter); }
using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour { public float radius = 5; void Start() { float perimeter = 2 * Mathf.PI * radius; Debug.Log("The perimeter of the circle is: " + perimeter); } }