transform_LookAt.hpp

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#ifndef TRANSFORM_LOOK_AT_HPP
#define TRANSFORM_LOOK_AT_HPP

#include "math.hpp"

class LookAt
{
public:
  LookAt();

  const Vec3d& getEye() const { return mEye; }
  const Vec3d& getCenter() const { return mCenter; }
  const Vec3d& getUp() const { return mUp; }
  void setEye(const Vec3d& eye) { mEye = eye; }
  void setCenter(const Vec3d& center) { mCenter = center; }
  void setUp(const Vec3d& up) { mUp = up; }
  void setDirection(const Vec3d& direction) { mEye = mCenter - direction; }
  void computeVectors();
  void computeTransform();
  void computeInverse();
  void computeTransformGL();
  const Matrix44d& getTransformMatrix() const { return mTransform; }
  const Matrix44d& getInverseMatrix() const { return mInverse; }
protected:
  Vec3d  mEye;
  Vec3d  mCenter;
  Vec3d  mUp;
  Vec3d  mSide;
  Vec3d  mForward;
  Matrix44d mTransform;
  Matrix44d mInverse;
};

#endif // TRANSFORM_LOOK_AT_HPP