//! @name Public camera properties
public:
- //! Sets camera Eye position.
- //! @param theEye [in] the location of camera's Eye.
- Standard_EXPORT void SetEye (const gp_Pnt& theEye);
+ //! Get camera look direction.
+ //! @return camera look direction.
+ const gp_Dir& Direction() const { return myDirection; }
- //! Get camera Eye position.
- //! @return camera eye location.
- const gp_Pnt& Eye() const
- {
- return myEye;
- }
+ //! Sets camera look direction preserving the current Eye() position.
+ //! WARNING! This method does NOT verify that the current Up() vector is orthogonal to the new Direction.
+ //! @param theDir [in] the direction.
+ Standard_EXPORT void SetDirectionFromEye (const gp_Dir& theDir);
- //! Sets Center of the camera.
- //! @param theCenter [in] the point where the camera looks at.
- Standard_EXPORT void SetCenter (const gp_Pnt& theCenter);
+ //! Sets camera look direction and computes the new Eye position relative to current Center.
+ //! WARNING! This method does NOT verify that the current Up() vector is orthogonal to the new Direction.
+ //! @param theDir [in] the direction.
+ Standard_EXPORT void SetDirection (const gp_Dir& theDir);
- //! Get Center of the camera.
- //! @return the point where the camera looks at.
- const gp_Pnt& Center() const
- {
- return myCenter;
- }
+ //! Get camera Up direction vector.
+ //! @return Camera's Up direction vector.
+ const gp_Dir& Up() const { return myUp; }
//! Sets camera Up direction vector, orthogonal to camera direction.
+ //! WARNING! This method does NOT verify that the new Up vector is orthogonal to the current Direction().
//! @param theUp [in] the Up direction vector.
+ //! @sa OrthogonalizeUp().
Standard_EXPORT void SetUp (const gp_Dir& theUp);
//! Orthogonalize up direction vector.
//! Return a copy of orthogonalized up direction vector.
Standard_EXPORT gp_Dir OrthogonalizedUp() const;
- //! Get camera Up direction vector.
- //! @return Camera's Up direction vector.
- const gp_Dir& Up() const
- {
- return myUp;
- }
+ //! Get camera Eye position.
+ //! @return camera eye location.
+ const gp_Pnt& Eye() const { return myEye; }
- //! Set camera axial scale.
- //! @param theAxialScale [in] the axial scale vector.
- Standard_EXPORT void SetAxialScale (const gp_XYZ& theAxialScale);
+ //! Sets camera Eye position.
+ //! Unlike SetEye(), this method only changes Eye point and preserves camera direction.
+ //! @param theEye [in] the location of camera's Eye.
+ //! @sa SetEye()
+ Standard_EXPORT void MoveEyeTo (const gp_Pnt& theEye);
- //! Get camera axial scale.
- //! @return Camera's axial scale.
- const gp_XYZ& AxialScale() const
+ //! Sets camera Eye and Center positions.
+ //! @param theEye [in] the location of camera's Eye
+ //! @param theCenter [in] the location of camera's Center
+ Standard_EXPORT void SetEyeAndCenter (const gp_Pnt& theEye,
+ const gp_Pnt& theCenter);
+
+ //! Sets camera Eye position.
+ //! WARNING! For backward compatibility reasons, this method also changes view direction,
+ //! so that the new direction is computed from new Eye position to old Center position.
+ //! @param theEye [in] the location of camera's Eye.
+ //! @sa MoveEyeTo(), SetEyeAndCenter()
+ Standard_EXPORT void SetEye (const gp_Pnt& theEye);
+
+ //! Get Center of the camera, e.g. the point where camera looks at.
+ //! This point is computed as Eye() translated along Direction() at Distance().
+ //! @return the point where the camera looks at.
+ gp_Pnt Center() const
{
- return myAxialScale;
+ return myEye.XYZ() + myDirection.XYZ() * myDistance;
}
- //! Set distance of Eye from camera Center.
- //! @param theDistance [in] the distance.
- Standard_EXPORT void SetDistance (const Standard_Real theDistance);
+ //! Sets Center of the camera, e.g. the point where camera looks at.
+ //! This methods changes camera direction, so that the new direction is computed
+ //! from current Eye position to specified Center position.
+ //! @param theCenter [in] the point where the camera looks at.
+ Standard_EXPORT void SetCenter (const gp_Pnt& theCenter);
//! Get distance of Eye from camera Center.
//! @return the distance.
- Standard_EXPORT Standard_Real Distance() const;
+ Standard_Real Distance() const { return myDistance; }
- //! Sets camera look direction.
- //! @param theDir [in] the direction.
- Standard_EXPORT void SetDirection (const gp_Dir& theDir);
+ //! Set distance of Eye from camera Center.
+ //! @param theDistance [in] the distance.
+ Standard_EXPORT void SetDistance (const Standard_Real theDistance);
- //! Get camera look direction.
- //! @return camera look direction.
- Standard_EXPORT gp_Dir Direction() const;
+ //! Get camera scale.
+ //! @return camera scale factor.
+ Standard_EXPORT Standard_Real Scale() const;
//! Sets camera scale. For orthographic projection the scale factor
//! corresponds to parallel scale of view mapping (i.e. size
//! @param theScale [in] the scale factor.
Standard_EXPORT void SetScale (const Standard_Real theScale);
- //! Get camera scale.
- //! @return camera scale factor.
- Standard_EXPORT Standard_Real Scale() const;
+ //! Get camera axial scale.
+ //! @return Camera's axial scale.
+ const gp_XYZ& AxialScale() const { return myAxialScale; }
+
+ //! Set camera axial scale.
+ //! @param theAxialScale [in] the axial scale vector.
+ Standard_EXPORT void SetAxialScale (const gp_XYZ& theAxialScale);
//! Change camera projection type.
//! When switching to perspective projection from orthographic one,
//! Reference point differs for perspective and ortho modes
//! (made for compatibility, to be improved..).
//! @param theEye [in] the eye coordinates in 3D space.
- //! @param theLookAt [in] the point the camera looks at.
+ //! @param theFwdDir [in] view direction
//! @param theUpDir [in] the up direction vector.
//! @param theAxialScale [in] the axial scale vector.
//! @param theOutMx [in/out] the orientation matrix.
template <typename Elem_t>
static void
LookOrientation (const NCollection_Vec3<Elem_t>& theEye,
- const NCollection_Vec3<Elem_t>& theLookAt,
+ const NCollection_Vec3<Elem_t>& theFwdDir,
const NCollection_Vec3<Elem_t>& theUpDir,
const NCollection_Vec3<Elem_t>& theAxialScale,
NCollection_Mat4<Elem_t>& theOutMx);
private:
- gp_Dir myUp; //!< Camera up direction vector.
- gp_Pnt myEye; //!< Camera eye position.
- gp_Pnt myCenter; //!< Camera center.
+ gp_Dir myUp; //!< Camera up direction vector
+ gp_Dir myDirection;//!< Camera view direction (from eye)
+ gp_Pnt myEye; //!< Camera eye position
+ Standard_Real myDistance; //!< distance from Eye to Center
gp_XYZ myAxialScale; //!< World axial scale.
projects / occt.git / blobdiff