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https://github.com/SoftFever/OrcaSlicer.git
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Workaround to fix SPE-1082 + refactoring of 6 dof camera
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parent
15cb8ec653
commit
17a6b696e7
3 changed files with 137 additions and 8 deletions
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@ -240,17 +240,27 @@ void Camera::apply_view_matrix() const
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void Camera::apply_projection(const BoundingBoxf3& box, double near_z, double far_z) const
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{
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#if !ENABLE_6DOF_CAMERA
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set_distance(DefaultDistance);
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#endif // !ENABLE_6DOF_CAMERA
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double w = 0.0;
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double h = 0.0;
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#if ENABLE_6DOF_CAMERA
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double old_distance = m_distance;
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m_frustrum_zs = calc_tight_frustrum_zs_around(box);
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if (m_distance != old_distance)
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// the camera has been moved re-apply view matrix
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apply_view_matrix();
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#else
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while (true)
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{
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m_frustrum_zs = calc_tight_frustrum_zs_around(box);
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#endif // !ENABLE_6DOF_CAMERA
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if (near_z > 0.0)
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m_frustrum_zs.first = std::min(m_frustrum_zs.first, near_z);
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m_frustrum_zs.first = std::max(std::min(m_frustrum_zs.first, near_z), FrustrumMinNearZ);
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if (far_z > 0.0)
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m_frustrum_zs.second = std::max(m_frustrum_zs.second, far_z);
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@ -281,6 +291,7 @@ void Camera::apply_projection(const BoundingBoxf3& box, double near_z, double fa
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}
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}
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#if !ENABLE_6DOF_CAMERA
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if (m_type == Perspective)
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{
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double fov_deg = Geometry::rad2deg(2.0 * std::atan(h / m_frustrum_zs.first));
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@ -300,6 +311,7 @@ void Camera::apply_projection(const BoundingBoxf3& box, double near_z, double fa
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else
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break;
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}
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#endif // !ENABLE_6DOF_CAMERA
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glsafe(::glMatrixMode(GL_PROJECTION));
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glsafe(::glLoadIdentity());
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@ -324,14 +336,22 @@ void Camera::apply_projection(const BoundingBoxf3& box, double near_z, double fa
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}
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#if ENABLE_THUMBNAIL_GENERATOR
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#if ENABLE_6DOF_CAMERA
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void Camera::zoom_to_box(const BoundingBoxf3& box, double margin_factor)
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#else
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void Camera::zoom_to_box(const BoundingBoxf3& box, int canvas_w, int canvas_h, double margin_factor)
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#endif // ENABLE_6DOF_CAMERA
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#else
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void Camera::zoom_to_box(const BoundingBoxf3& box, int canvas_w, int canvas_h)
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#endif // ENABLE_THUMBNAIL_GENERATOR
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{
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// Calculate the zoom factor needed to adjust the view around the given box.
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#if ENABLE_THUMBNAIL_GENERATOR
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#if ENABLE_6DOF_CAMERA
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double zoom = calc_zoom_to_bounding_box_factor(box, margin_factor);
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#else
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double zoom = calc_zoom_to_bounding_box_factor(box, canvas_w, canvas_h, margin_factor);
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#endif // ENABLE_6DOF_CAMERA
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#else
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double zoom = calc_zoom_to_bounding_box_factor(box, canvas_w, canvas_h);
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#endif // ENABLE_THUMBNAIL_GENERATOR
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@ -348,10 +368,18 @@ void Camera::zoom_to_box(const BoundingBoxf3& box, int canvas_w, int canvas_h)
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}
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#if ENABLE_THUMBNAIL_GENERATOR
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#if ENABLE_6DOF_CAMERA
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void Camera::zoom_to_volumes(const GLVolumePtrs& volumes, double margin_factor)
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#else
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void Camera::zoom_to_volumes(const GLVolumePtrs& volumes, int canvas_w, int canvas_h, double margin_factor)
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#endif // ENABLE_6DOF_CAMERA
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{
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Vec3d center;
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#if ENABLE_6DOF_CAMERA
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double zoom = calc_zoom_to_volumes_factor(volumes, center, margin_factor);
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#else
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double zoom = calc_zoom_to_volumes_factor(volumes, canvas_w, canvas_h, center, margin_factor);
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#endif // ENABLE_6DOF_CAMERA
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if (zoom > 0.0)
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{
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m_zoom = zoom;
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@ -389,6 +417,7 @@ void Camera::debug_render() const
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float deltaZ = farZ - nearZ;
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float zoom = (float)m_zoom;
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float fov = (float)get_fov();
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std::array<int, 4>viewport = get_viewport();
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float gui_scale = (float)get_gui_scale();
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ImGui::InputText("Type", type.data(), type.length(), ImGuiInputTextFlags_ReadOnly);
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@ -408,6 +437,8 @@ void Camera::debug_render() const
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ImGui::InputFloat("Zoom", &zoom, 0.0f, 0.0f, "%.6f", ImGuiInputTextFlags_ReadOnly);
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ImGui::InputFloat("Fov", &fov, 0.0f, 0.0f, "%.6f", ImGuiInputTextFlags_ReadOnly);
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ImGui::Separator();
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ImGui::InputInt4("Viewport", viewport.data(), ImGuiInputTextFlags_ReadOnly);
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ImGui::Separator();
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ImGui::InputFloat("GUI scale", &gui_scale, 0.0f, 0.0f, "%.6f", ImGuiInputTextFlags_ReadOnly);
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imgui.end();
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}
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@ -427,10 +458,31 @@ void Camera::translate_world(const Vec3d& displacement)
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void Camera::rotate_on_sphere(double delta_azimut_rad, double delta_zenit_rad)
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{
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// FIXME -> The following is a HACK !!!
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// When the value of the zenit rotation is large enough, the following call to rotate() shows
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// numerical instability introducing some scaling into m_view_matrix (verified by checking
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// that the camera space unit vectors are no more unit).
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// See also https://dev.prusa3d.com/browse/SPE-1082
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// We split the zenit rotation into a set of smaller rotations which are then applied.
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static const double MAX_ALLOWED = Geometry::deg2rad(0.1);
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unsigned int zenit_steps_count = 1 + (unsigned int)(std::abs(delta_zenit_rad) / MAX_ALLOWED);
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double zenit_step = delta_zenit_rad / (double)zenit_steps_count;
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Vec3d target = m_target;
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translate_world(-target);
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m_view_matrix.rotate(Eigen::AngleAxisd(delta_zenit_rad, get_dir_right()));
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m_view_matrix.rotate(Eigen::AngleAxisd(delta_azimut_rad, Vec3d::UnitZ()));
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if (zenit_step != 0.0)
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{
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Vec3d right = get_dir_right();
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for (unsigned int i = 0; i < zenit_steps_count; ++i)
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{
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m_view_matrix.rotate(Eigen::AngleAxisd(zenit_step, right));
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}
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}
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if (delta_azimut_rad != 0.0)
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m_view_matrix.rotate(Eigen::AngleAxisd(delta_azimut_rad, Vec3d::UnitZ()));
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translate_world(target);
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}
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@ -453,7 +505,11 @@ void Camera::rotate_local_around_pivot(const Vec3d& rotation_rad, const Vec3d& p
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double Camera::min_zoom() const
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{
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#if ENABLE_6DOF_CAMERA
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return 0.7 * calc_zoom_to_bounding_box_factor(m_scene_box);
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#else
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return 0.7 * calc_zoom_to_bounding_box_factor(m_scene_box, (int)m_viewport[2], (int)m_viewport[3]);
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#endif // ENABLE_6DOF_CAMERA
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}
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#endif // ENABLE_6DOF_CAMERA
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@ -462,8 +518,10 @@ std::pair<double, double> Camera::calc_tight_frustrum_zs_around(const BoundingBo
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std::pair<double, double> ret;
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auto& [near_z, far_z] = ret;
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#if !ENABLE_6DOF_CAMERA
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while (true)
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{
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#endif // !ENABLE_6DOF_CAMERA
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// box in eye space
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BoundingBoxf3 eye_box = box.transformed(m_view_matrix);
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near_z = -eye_box.max(2);
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@ -482,18 +540,39 @@ std::pair<double, double> Camera::calc_tight_frustrum_zs_around(const BoundingBo
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far_z = mid_z + half_size;
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}
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#if ENABLE_6DOF_CAMERA
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if (near_z < FrustrumMinNearZ)
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{
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float delta = FrustrumMinNearZ - near_z;
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set_distance(m_distance + delta);
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near_z += delta;
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far_z += delta;
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}
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else if ((near_z > 2.0 * FrustrumMinNearZ) && (m_distance > DefaultDistance))
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{
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float delta = m_distance - DefaultDistance;
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set_distance(DefaultDistance);
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near_z -= delta;
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far_z -= delta;
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}
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#else
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if (near_z >= FrustrumMinNearZ)
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break;
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// ensure min Near Z
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// ensure min near z
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set_distance(m_distance + FrustrumMinNearZ - near_z);
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}
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#endif // ENABLE_6DOF_CAMERA
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return ret;
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}
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#if ENABLE_THUMBNAIL_GENERATOR
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#if ENABLE_6DOF_CAMERA
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double Camera::calc_zoom_to_bounding_box_factor(const BoundingBoxf3& box, double margin_factor) const
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#else
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double Camera::calc_zoom_to_bounding_box_factor(const BoundingBoxf3& box, int canvas_w, int canvas_h, double margin_factor) const
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#endif // ENABLE_6DOF_CAMERA
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#else
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double Camera::calc_zoom_to_bounding_box_factor(const BoundingBoxf3& box, int canvas_w, int canvas_h) const
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#endif // ENABLE_THUMBNAIL_GENERATOR
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@ -505,8 +584,10 @@ double Camera::calc_zoom_to_bounding_box_factor(const BoundingBoxf3& box, int ca
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// project the box vertices on a plane perpendicular to the camera forward axis
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// then calculates the vertices coordinate on this plane along the camera xy axes
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#if !ENABLE_6DOF_CAMERA
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// ensure that the view matrix is updated
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apply_view_matrix();
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#endif // !ENABLE_6DOF_CAMERA
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Vec3d right = get_dir_right();
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Vec3d up = get_dir_up();
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@ -563,11 +644,19 @@ double Camera::calc_zoom_to_bounding_box_factor(const BoundingBoxf3& box, int ca
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dx *= margin_factor;
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dy *= margin_factor;
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#if ENABLE_6DOF_CAMERA
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return std::min((double)m_viewport[2] / dx, (double)m_viewport[3] / dy);
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#else
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return std::min((double)canvas_w / dx, (double)canvas_h / dy);
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#endif // ENABLE_6DOF_CAMERA
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}
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#if ENABLE_THUMBNAIL_GENERATOR
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#if ENABLE_6DOF_CAMERA
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double Camera::calc_zoom_to_volumes_factor(const GLVolumePtrs& volumes, Vec3d& center, double margin_factor) const
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#else
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double Camera::calc_zoom_to_volumes_factor(const GLVolumePtrs& volumes, int canvas_w, int canvas_h, Vec3d& center, double margin_factor) const
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#endif // ENABLE_6DOF_CAMERA
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{
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if (volumes.empty())
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return -1.0;
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@ -575,8 +664,10 @@ double Camera::calc_zoom_to_volumes_factor(const GLVolumePtrs& volumes, int canv
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// project the volumes vertices on a plane perpendicular to the camera forward axis
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// then calculates the vertices coordinate on this plane along the camera xy axes
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#if !ENABLE_6DOF_CAMERA
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// ensure that the view matrix is updated
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apply_view_matrix();
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#endif // !ENABLE_6DOF_CAMERA
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Vec3d right = get_dir_right();
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Vec3d up = get_dir_up();
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@ -628,14 +719,26 @@ double Camera::calc_zoom_to_volumes_factor(const GLVolumePtrs& volumes, int canv
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if ((dx <= 0.0) || (dy <= 0.0))
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return -1.0f;
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#if ENABLE_6DOF_CAMERA
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return std::min((double)m_viewport[2] / dx, (double)m_viewport[3] / dy);
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#else
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return std::min((double)canvas_w / dx, (double)canvas_h / dy);
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#endif // ENABLE_6DOF_CAMERA
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}
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#endif // ENABLE_THUMBNAIL_GENERATOR
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void Camera::set_distance(double distance) const
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{
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#if ENABLE_6DOF_CAMERA
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if (m_distance != distance)
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{
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m_view_matrix.translate((distance - m_distance) * get_dir_forward());
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m_distance = distance;
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}
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#else
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m_distance = distance;
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apply_view_matrix();
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#endif // ENABLE_6DOF_CAMERA
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}
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#if ENABLE_6DOF_CAMERA
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