Panda3D
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A fisheye lens. More...
#include "fisheyeLens.h"
Public Member Functions | |
FisheyeLens (const FisheyeLens ©) | |
virtual TypeHandle | force_init_type () |
virtual TypeHandle | get_type () const |
void | operator= (const FisheyeLens ©) |
virtual | PT (Lens) make_copy() const |
Static Public Member Functions | |
static TypeHandle | get_class_type () |
static void | init_type () |
Protected Member Functions | |
virtual bool | do_extrude (const Lens::CData *lens_cdata, const LPoint3 &point2d, LPoint3 &near_point, LPoint3 &far_point) const |
Given a 2-d point in the range (-1,1) in both dimensions, where (0,0) is the center of the lens and (-1,-1) is the lower-left corner, compute the corresponding vector in space that maps to this point, if such a vector can be determined. | |
virtual bool | do_extrude_vec (const Lens::CData *lens_cdata, const LPoint3 &point2d, LVector3 &vec) const |
Given a 2-d point in the range (-1,1) in both dimensions, where (0,0) is the center of the lens and (-1,-1) is the lower-left corner, compute the vector that corresponds to the view direction. | |
virtual bool | do_project (const Lens::CData *lens_cdata, const LPoint3 &point3d, LPoint3 &point2d) const |
Given a 3-d point in space, determine the 2-d point this maps to, in the range (-1,1) in both dimensions, where (0,0) is the center of the lens and (-1,-1) is the lower-left corner. | |
virtual PN_stdfloat | film_to_fov (PN_stdfloat film_size, PN_stdfloat focal_length, bool horiz) const |
Given a width (or height) on the film and a focal length, compute the field of view in degrees. | |
virtual PN_stdfloat | fov_to_film (PN_stdfloat fov, PN_stdfloat focal_length, bool horiz) const |
Given a field of view in degrees and a focal length, compute the correspdonding width (or height) on the film. | |
virtual PN_stdfloat | fov_to_focal_length (PN_stdfloat fov, PN_stdfloat film_size, bool horiz) const |
Given a field of view in degrees and a width (or height) on the film, compute the focal length of the lens. |
A fisheye lens.
This nonlinear lens introduces a spherical distortion to the image, which is minimal at small angles from the lens, and increases at larger angles from the lens. The field of view may extend to 360 degrees.
Definition at line 30 of file fisheyeLens.h.
bool FisheyeLens::do_extrude | ( | const Lens::CData * | lens_cdata, |
const LPoint3 & | point2d, | ||
LPoint3 & | near_point, | ||
LPoint3 & | far_point | ||
) | const [protected, virtual] |
Given a 2-d point in the range (-1,1) in both dimensions, where (0,0) is the center of the lens and (-1,-1) is the lower-left corner, compute the corresponding vector in space that maps to this point, if such a vector can be determined.
The vector is returned by indicating the points on the near plane and far plane that both map to the indicated 2-d point.
The z coordinate of the 2-d point is ignored.
Returns true if the vector is defined, or false otherwise.
Reimplemented from Lens.
Definition at line 67 of file fisheyeLens.cxx.
References LVecBase2f::length().
Referenced by do_extrude_vec().
bool FisheyeLens::do_extrude_vec | ( | const Lens::CData * | lens_cdata, |
const LPoint3 & | point2d, | ||
LVector3 & | vec | ||
) | const [protected, virtual] |
Given a 2-d point in the range (-1,1) in both dimensions, where (0,0) is the center of the lens and (-1,-1) is the lower-left corner, compute the vector that corresponds to the view direction.
This will be parallel to the normal on the surface (the far plane) corresponding to the lens shape at this point.
See the comment block on Lens::extrude_vec_impl() for a more in-depth comment on the meaning of this vector.
The z coordinate of the 2-d point is ignored.
Returns true if the vector is defined, or false otherwise.
Reimplemented from Lens.
Definition at line 131 of file fisheyeLens.cxx.
References do_extrude().
bool FisheyeLens::do_project | ( | const Lens::CData * | lens_cdata, |
const LPoint3 & | point3d, | ||
LPoint3 & | point2d | ||
) | const [protected, virtual] |
Given a 3-d point in space, determine the 2-d point this maps to, in the range (-1,1) in both dimensions, where (0,0) is the center of the lens and (-1,-1) is the lower-left corner.
Some lens types also set the z coordinate of the 2-d point to a value in the range (-1, 1), where 1 represents a point on the near plane, and -1 represents a point on the far plane.
Returns true if the 3-d point is in front of the lens and within the viewing frustum (in which case point2d is filled in), or false otherwise.
Reimplemented from Lens.
Definition at line 160 of file fisheyeLens.cxx.
References LVecBase3f::length(), and LVecBase2f::normalize().
PN_stdfloat FisheyeLens::film_to_fov | ( | PN_stdfloat | film_size, |
PN_stdfloat | focal_length, | ||
bool | horiz | ||
) | const [protected, virtual] |
Given a width (or height) on the film and a focal length, compute the field of view in degrees.
If horiz is true, this is in the horizontal direction; otherwise, it is in the vertical direction (some lenses behave differently in each direction).
Reimplemented from Lens.
Definition at line 254 of file fisheyeLens.cxx.
PN_stdfloat FisheyeLens::fov_to_film | ( | PN_stdfloat | fov, |
PN_stdfloat | focal_length, | ||
bool | horiz | ||
) | const [protected, virtual] |
Given a field of view in degrees and a focal length, compute the correspdonding width (or height) on the film.
If horiz is true, this is in the horizontal direction; otherwise, it is in the vertical direction (some lenses behave differently in each direction).
Reimplemented from Lens.
Definition at line 226 of file fisheyeLens.cxx.
PN_stdfloat FisheyeLens::fov_to_focal_length | ( | PN_stdfloat | fov, |
PN_stdfloat | film_size, | ||
bool | horiz | ||
) | const [protected, virtual] |
Given a field of view in degrees and a width (or height) on the film, compute the focal length of the lens.
If horiz is true, this is in the horizontal direction; otherwise, it is in the vertical direction (some lenses behave differently in each direction).
Reimplemented from Lens.
Definition at line 240 of file fisheyeLens.cxx.