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straighten out min_fov with film_size and focal_length

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This commit is contained in:
David Rose 2006-10-19 23:58:30 +00:00
parent 7a41d118c7
commit ab895aaab6
1 changed files with 51 additions and 25 deletions
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72
panda/src/gobj/lens.cxx
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@ -310,6 +310,9 @@ set_min_fov(float min_fov) {
} else {
// Otherwise, throw out film size.
nassertv(_film_size_seq == 0);
// Make sure we save the aspect ratio first.
compute_aspect_ratio();
adjust_user_flags(UF_film_width | UF_film_height | UF_vfov | UF_hfov,
UF_min_fov);
}
@ -343,6 +346,9 @@ set_fov(float hfov) {
} else {
// Otherwise, throw out film size.
nassertv(_film_size_seq == 0);
// Make sure we save the aspect ratio first.
compute_aspect_ratio();
adjust_user_flags(UF_film_width | UF_film_height | UF_vfov | UF_min_fov,
UF_hfov);
}
@ -1419,34 +1425,54 @@ project_impl(const LPoint3f &point3d, LPoint3f &point2d) const {
////////////////////////////////////////////////////////////////////
void Lens::
compute_film_size() {
if ((_user_flags & UF_film_width) == 0) {
if ((_user_flags & (UF_hfov | UF_focal_length)) == (UF_hfov | UF_focal_length)) {
_film_size[0] = fov_to_film(_fov[0], _focal_length, true);
if ((_user_flags & (UF_min_fov | UF_focal_length)) == (UF_min_fov | UF_focal_length)) {
// If we just have a min FOV and a focal length, that determines
// the smaller of the two film_sizes, and the larger is simply
// chosen according to the aspect ratio.
float fs = fov_to_film(_min_fov, _focal_length, true);
nassertv((_user_flags & UF_aspect_ratio) != 0 ||
(_comp_flags & CF_aspect_ratio) != 0);
if (_aspect_ratio < 1.0f) {
_film_size[1] = fs / _aspect_ratio;
_film_size[0] = fs;
} else {
_film_size[0] = 1.0f;
_film_size[0] = fs * _aspect_ratio;
_film_size[1] = fs;
}
}
if ((_user_flags & UF_film_height) == 0) {
if ((_user_flags & (UF_vfov | UF_focal_length)) == (UF_vfov | UF_focal_length)) {
_film_size[1] = fov_to_film(_fov[1], _focal_length, false);
} else if ((_user_flags & (UF_hfov | UF_vfov)) == (UF_hfov | UF_vfov)) {
// If we don't have a focal length, but we have an explicit vfov
// and hfov, we can infer the focal length is whatever makes the
// film width, above, be what it is.
if ((_comp_flags & CF_focal_length) == 0) {
_focal_length = fov_to_focal_length(_fov[0], _film_size[0], true);
adjust_comp_flags(0, CF_focal_length);
} else {
if ((_user_flags & UF_film_width) == 0) {
if ((_user_flags & (UF_hfov | UF_focal_length)) == (UF_hfov | UF_focal_length)) {
_film_size[0] = fov_to_film(_fov[0], _focal_length, true);
} else {
_film_size[0] = 1.0f;
}
_film_size[1] = fov_to_film(_fov[1], _focal_length, false);
}
} else if ((_user_flags & UF_aspect_ratio) != 0) {
_film_size[1] = _film_size[0] / _aspect_ratio;
if ((_user_flags & UF_film_height) == 0) {
if ((_user_flags & (UF_vfov | UF_focal_length)) == (UF_vfov | UF_focal_length)) {
_film_size[1] = fov_to_film(_fov[1], _focal_length, false);
} else {
// Default is an aspect ratio of 1.
_film_size[1] = _film_size[0];
} else if ((_user_flags & (UF_hfov | UF_vfov)) == (UF_hfov | UF_vfov)) {
// If we don't have a focal length, but we have an explicit vfov
// and hfov, we can infer the focal length is whatever makes the
// film width, above, be what it is.
if ((_comp_flags & CF_focal_length) == 0) {
_focal_length = fov_to_focal_length(_fov[0], _film_size[0], true);
adjust_comp_flags(0, CF_focal_length);
}
_film_size[1] = fov_to_film(_fov[1], _focal_length, false);
} else if ((_user_flags & UF_aspect_ratio) != 0 ||
(_comp_flags & CF_aspect_ratio) != 0) {
_film_size[1] = _film_size[0] / _aspect_ratio;
} else {
// Default is an aspect ratio of 1.
_film_size[1] = _film_size[0];
}
}
}
@ -1564,8 +1590,8 @@ compute_aspect_ratio() {
} else {
_aspect_ratio = film_size[0] / film_size[1];
}
adjust_comp_flags(0, CF_aspect_ratio);
}
adjust_comp_flags(0, CF_aspect_ratio);
}
////////////////////////////////////////////////////////////////////