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/* ----------------------------------------------------------------------- *
 * This file is part of GEL, http://www.imm.dtu.dk/GEL
 * Copyright (C) the authors and DTU Informatics
 * For license and list of authors, see ../../doc/intro.pdf
 * ----------------------------------------------------------------------- */

#include "Mat3x3f.h"

namespace CGLA {
        Mat3x3f rotation_Mat3x3f(Axis axis, float angle)
        {
                Mat3x3f m(0.0f);

                switch(axis)
                        {
                        case XAXIS:
                                m[0][0] = 1.0f;
                                m[1][1] = cos(angle);
                                m[1][2] = sin(angle);
                                m[2][1] = -sin(angle);
                                m[2][2] = cos(angle);
                                break;
                        case YAXIS:
                                m[0][0] = cos(angle);
                                m[0][2] = -sin(angle);
                                m[2][0] = sin(angle);
                                m[2][2] = cos(angle);
                                m[1][1] = 1.0f;
                                break;
                        case ZAXIS:
                                m[0][0] = cos(angle);
                                m[0][1] = sin(angle);
                                m[1][0] = -sin(angle);
                                m[1][1] = cos(angle);
                                m[2][2] = 1.0f;
                                break;
                        }

                return m;
        }

        Mat3x3f scaling_Mat3x3f(const Vec3f& v)
        {
                Mat3x3f m(0.0f);
                m[0][0] = v[0];
                m[1][1] = v[1];
                m[2][2] = v[2];
                return m;
        }


}