Line data    Source code

       1             : /* Copyright (C) 2020 Wildfire Games.
       2             :  * This file is part of 0 A.D.
       3             :  *
       4             :  * 0 A.D. is free software: you can redistribute it and/or modify
       5             :  * it under the terms of the GNU General Public License as published by
       6             :  * the Free Software Foundation, either version 2 of the License, or
       7             :  * (at your option) any later version.
       8             :  *
       9             :  * 0 A.D. is distributed in the hope that it will be useful,
      10             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      11             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      12             :  * GNU General Public License for more details.
      13             :  *
      14             :  * You should have received a copy of the GNU General Public License
      15             :  * along with 0 A.D.  If not, see <http://www.gnu.org/licenses/>.
      16             :  */
      17             : 
      18             : /*
      19             :  * Provides an interface for a vector in R3 and allows vector and
      20             :  * scalar operations on it
      21             :  */
      22             : 
      23             : #include "precompiled.h"
      24             : 
      25             : #include "Vector3D.h"
      26             : 
      27             : #include "MathUtil.h"
      28             : #include "FixedVector3D.h"
      29             : 
      30             : #include <cmath>
      31             : #include <algorithm>
      32             : #include <limits>
      33             : 
      34           8 : CVector3D::CVector3D(const CFixedVector3D& v) :
      35           8 :     X(v.X.ToFloat()), Y(v.Y.ToFloat()), Z(v.Z.ToFloat())
      36             : {
      37           8 : }
      38             : 
      39             : // static
      40        1443 : CVector3D CVector3D::Max()
      41             : {
      42        1443 :     const float max_float = std::numeric_limits<float>::max();
      43        1443 :     return CVector3D(max_float, max_float, max_float);
      44             : }
      45             : 
      46             : // static
      47        1435 : CVector3D CVector3D::Min()
      48             : {
      49        1435 :     const float max_float = std::numeric_limits<float>::max();
      50        1435 :     return CVector3D(-max_float, -max_float, -max_float);
      51             : }
      52             : 
      53           0 : int CVector3D::operator ! () const
      54             : {
      55           0 :     if (X != 0.0f ||
      56           0 :         Y != 0.0f ||
      57           0 :         Z != 0.0f)
      58             : 
      59           0 :         return 0;
      60             : 
      61           0 :     return 1;
      62             : }
      63             : 
      64         172 : float CVector3D::LengthSquared () const
      65             : {
      66         172 :     return ( SQR(X) + SQR(Y) + SQR(Z) );
      67             : }
      68             : 
      69         142 : float CVector3D::Length () const
      70             : {
      71         142 :     return sqrtf ( LengthSquared() );
      72             : }
      73             : 
      74          60 : void CVector3D::Normalize ()
      75             : {
      76          60 :     float scale = 1.0f/Length ();
      77             : 
      78          60 :     X *= scale;
      79          60 :     Y *= scale;
      80          60 :     Z *= scale;
      81          60 : }
      82             : 
      83          21 : CVector3D CVector3D::Normalized () const
      84             : {
      85          21 :     float scale = 1.0f/Length ();
      86             : 
      87          21 :     return CVector3D(X * scale, Y * scale, Z * scale);
      88             : }
      89             : 
      90             : 
      91             : //-----------------------------------------------------------------------------
      92             : 
      93           0 : float MaxComponent(const CVector3D& v)
      94             : {
      95           0 :     return std::max({v.X, v.Y, v.Z});
      96           3 : }