camera3d.cpp

#include "camera3d.h"
#include <QDebug>

//Left hand co-ordinate system
const QVector3D Camera3D::LocalForward(0.0f, 0.0f, -1.0f);
const QVector3D Camera3D::LocalUp(0.0f, 1.0f, 0.0f);
const QVector3D Camera3D::LocalRight(1.0f, 0.0f, 0.0f);

void Camera3D::translate(const QVector3D& dt){ m_dirty = true; m_translation += dt; }
void Camera3D::rotate(const QQuaternion& dr) { m_dirty = true; m_rotation = dr * m_rotation; }

void Camera3D::setRotation(const QQuaternion& r) {m_dirty = true; m_rotation = r; }
void Camera3D::setTranslation(const QVector3D& t) {m_dirty = true; m_translation = t; }

const QMatrix4x4 &Camera3D::toMatrix()
{
  if (m_dirty)
  {
    m_dirty = false;
    m_world.setToIdentity();
    m_world.rotate(m_rotation.conjugate());
    m_world.translate(-m_translation);
  }
  return m_world;
}

QVector3D Camera3D::forward() const { return m_rotation.rotatedVector(LocalForward); }
QVector3D Camera3D::right() const{ return m_rotation.rotatedVector(LocalRight);}
QVector3D Camera3D::up() const { return m_rotation.rotatedVector(LocalUp); }

QDebug operator<<(QDebug dbg, const Camera3D &transform)
{
    dbg << "Camera3D\n{\n";
    dbg << "Position: <" << transform.translation().x() << ", " << transform.translation().y() << ", " << transform.translation().z() << ">\n";
    dbg << "Rotation: <" << transform.rotation().x() << ", " << transform.rotation().y() << ", " << transform.rotation().z() << " | " << transform.rotation().scalar() << ">\n}";
    return dbg;
}

QDataStream& operator<<(QDataStream& out, const Camera3D& transform)
{
    out << transform.m_translation;
    out << transform.m_rotation;
    return out;
}

QDataStream& operator>>(QDataStream& in, Camera3D& transform)
{
    in >> transform.m_translation;
    in >> transform.m_rotation;
    transform.m_dirty = true;
    return in;
}