rotate3d.h

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#ifndef rotation3d_h
#define rotation3d_h

/*  3-D rotation matrix */

class Rotation3d : public Resource {
public:
    Rotation3d();
    virtual ~Rotation3d();
    
    void rotate(float x, float y, float z, float* tr)const;
    void rotate(float* r, float* tr) const;
    void inverse_rotate(float* tr, float* r) const;

    void identity();
    
    // relative transformation of the transformation
    void rotate_x(float radians);
    void rotate_y(float radians);
    void rotate_z(float radians);
    void origin(float x, float y, float z);
    void offset(float x, float y);
    void post_multiply(Rotation3d&);
    void x_axis(float& x, float& y) const;
    void y_axis(float& x, float& y) const;
    void z_axis(float& x, float& y) const;
private:
    float a_[3][3];
    float o_[2][3];
};
#endif