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/* ----------------------------------------------------------------------- *
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 * This file is part of GEL, http://www.imm.dtu.dk/GEL
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 * Copyright (C) the authors and DTU Informatics
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 * For license and list of authors, see ../../doc/intro.pdf
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 * ----------------------------------------------------------------------- */
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#include "Mat4x4d.h"
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namespace CGLA
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{
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  Mat4x4d rotation_Mat4x4d(Axis axis, float angle)
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  {
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    Mat4x4d m(0.0);
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    switch(axis)
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      {
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      case XAXIS:
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	m[0][0] = 1.0;
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	m[1][1] = cos(angle);
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	m[1][2] = sin(angle);
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	m[2][1] = -sin(angle);
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	m[2][2] = cos(angle);
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	m[3][3] = 1.0;
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	break;
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      case YAXIS:
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	m[0][0] = cos(angle);
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	m[0][2] = -sin(angle);
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	m[2][0] = sin(angle);
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	m[2][2] = cos(angle);
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	m[1][1] = 1.0;
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	m[3][3] = 1.0;
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	break;
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      case ZAXIS:
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	m[0][0] = cos(angle);
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	m[0][1] = sin(angle);
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	m[1][0] = -sin(angle);
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	m[1][1] = cos(angle);
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	m[2][2] = 1.0;
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	m[3][3] = 1.0;
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	break;
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      }
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    return m;
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  }
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  Mat4x4d translation_Mat4x4d(const Vec3d& v)
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  {
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    Mat4x4d m(0.0);
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    m[0][0] = 1.0;
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    m[1][1] = 1.0;
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    m[2][2] = 1.0;
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    m[3][3] = 1.0;
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    m[0][3] = v[0];
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    m[1][3] = v[1];
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    m[2][3] = v[2];
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    return m;
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  }
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  Mat4x4d scaling_Mat4x4d(const Vec3d& v)
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  {
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    Mat4x4d m(0.0);
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    m[0][0] = v[0];
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    m[1][1] = v[1];
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    m[2][2] = v[2];
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    m[3][3] = 1.0;
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    return m;
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  }
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}