Mega Code Archive
Gets the perpendicular vector to a specified vector
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//////////////////////////////////////////////////////////////////////
// Copyright (C) 2010 by Conquera Team
// Part of the Conquera Project
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 2 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
////////////////////////////////////////////////////////////////////////
using System;
using System.Collections.Generic;
using System.Text;
using Microsoft.Xna.Framework;
namespace Ale.Tools
{
/// <summary>
///
/// </summary>
public static class AleMathUtils
{
public static Random Random = new Random();
/// <summary>
/// Gets the perpendicular vector to a specified vector
/// </summary>
/// <param name="vec"></param>
/// <param name="perp"></param>
/// <returns></returns>
public static void GetPerpVector(ref Vector3 vec, out Vector3 perp)
{
Vector3 vecAbs = new Vector3(Math.Abs(vec.X), Math.Abs(vec.Y), Math.Abs(vec.Z));
//avoid parallel vector
if (vecAbs.X < vecAbs.Y)
{
if (vecAbs.X < vecAbs.Z)
{
perp = Vector3.UnitX;
}
else
{
perp = Vector3.UnitZ;
}
}
else
{
if (vecAbs.Y < vecAbs.Z)
{
perp = Vector3.UnitY;
}
else
{
perp = Vector3.UnitZ;
}
}
perp.Normalize();
Vector3.Cross(ref vec, ref perp, out perp);
}
/// <summary>
/// Gets the perpendicular vector to a specified vector
/// </summary>
/// <param name="vec"></param>
/// <returns></returns>
public static Vector3 GetPerpVector(ref Vector3 vec)
{
Vector3 perp;
GetPerpVector(ref vec, out perp);
return perp;
}
/// <summary>
/// Gets the perpendicular vector to a specified vector
/// </summary>
/// <param name="vec"></param>
/// <param name="perp"></param>
/// <returns></returns>
public static void GetPerpVector(ref Vector2 vec, out Vector2 perp)
{
perp = new Vector2(-vec.Y, vec.X);
}
}
}
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