Legacy Documentation: Version 5.2
LanguageEnglish
  • C#
  • JS

Script language

Select your preferred scripting language. All code snippets will be displayed in this language.

Mathf.Cos

Suggest a change

Success!

Thank you for helping us improve the quality of Unity Documentation. Although we cannot accept all submissions, we do read each suggested change from our users and will make updates where applicable.

Close

Sumbission failed

For some reason your suggested change could not be submitted. Please try again in a few minutes. And thank you for taking the time to help us improve the quality of Unity Documentation.

Close

Cancel

Switch to Manual
public static function Cos(f: float): float;
public static float Cos(float f);

Parameters

Description

Returns the cosine of angle f in radians.

#pragma strict
public class PolyDrawExample extends MonoBehaviour {
	public var numberOfSides: int;
	public var polygonRadius: float;
	public var polygonCenter: Vector2;
	function Update() {
		DebugDrawPolygon(polygonCenter, polygonRadius, numberOfSides);
	}
	// and radius.
	function DebugDrawPolygon(center: Vector2, radius: float, numSides: int) {
		// The corner that is used to start the polygon (parallel to the X axis).
		var startCorner: Vector2 = new Vector2(radius, 0) + polygonCenter;
		// The "previous" corner point, initialised to the starting corner.
		var previousCorner: Vector2 = startCorner;
		// For each corner after the starting corner...
		for (var i: int = 1; i < numSides; i++) {
			// Calculate the angle of the corner in radians.
			var cornerAngle: float = 2f * Mathf.PI / floatnumSides * i;
			// Get the X and Y coordinates of the corner point.
			var currentCorner: Vector2 = new Vector2(Mathf.Cos(cornerAngle) * radius, Mathf.Sin(cornerAngle) * radius) + polygonCenter;
			// Draw a side of the polygon by connecting the current corner to the previous one.
			Debug.DrawLine(currentCorner, previousCorner);
			// Having used the current corner, it now becomes the previous corner.
			previousCorner = currentCorner;
		}
		// Draw the final side by connecting the last corner to the starting corner.
		Debug.DrawLine(startCorner, previousCorner);
	}
}
using UnityEngine;
using System.Collections;

public class PolyDrawExample : MonoBehaviour { public int numberOfSides; public float polygonRadius; public Vector2 polygonCenter;

void Update() { DebugDrawPolygon(polygonCenter, polygonRadius, numberOfSides); }

// Draw a polygon in the XY plane with a specfied position, number of sides // and radius. void DebugDrawPolygon(Vector2 center, float radius, int numSides) { // The corner that is used to start the polygon (parallel to the X axis). Vector2 startCorner = new Vector2(radius, 0) + polygonCenter;

// The "previous" corner point, initialised to the starting corner. Vector2 previousCorner = startCorner;

// For each corner after the starting corner... for (int i = 1; i < numSides; i++) { // Calculate the angle of the corner in radians. float cornerAngle = 2f * Mathf.PI / (float) numSides * i;

// Get the X and Y coordinates of the corner point. Vector2 currentCorner = new Vector2(Mathf.Cos(cornerAngle) * radius, Mathf.Sin(cornerAngle) * radius) + polygonCenter;

// Draw a side of the polygon by connecting the current corner to the previous one. Debug.DrawLine(currentCorner, previousCorner);

// Having used the current corner, it now becomes the previous corner. previousCorner = currentCorner; }

// Draw the final side by connecting the last corner to the starting corner. Debug.DrawLine(startCorner, previousCorner); } }
Copyright © 2023 Unity Technologies
优美缔软件(上海)有限公司 版权所有
"Unity"、Unity 徽标及其他 Unity 商标是 Unity Technologies 或其附属机构在美国及其他地区的商标或注册商标。其他名称或品牌是其各自所有者的商标。
公安部备案号:
31010902002961