Merge remote-tracking branch 'remotes/origin/master' into vb_wold_object_manipulation

This commit is contained in:
bubnikv 2019-05-03 12:37:43 +02:00
commit 1c6006f657
76 changed files with 2255 additions and 204 deletions

View file

@ -52,6 +52,9 @@
#include <float.h>
#include <algorithm>
#include <cmath>
#if ENABLE_RENDER_STATISTICS
#include <chrono>
#endif // ENABLE_RENDER_STATISTICS
static const float TRACKBALLSIZE = 0.8f;
static const float GROUND_Z = -0.02f;
@ -672,6 +675,7 @@ GLCanvas3D::Mouse::Mouse()
: dragging(false)
, position(DBL_MAX, DBL_MAX)
, scene_position(DBL_MAX, DBL_MAX, DBL_MAX)
, ignore_left_up(false)
{
}
@ -1228,7 +1232,6 @@ GLCanvas3D::GLCanvas3D(wxGLCanvas* canvas, Bed3D& bed, Camera& camera, GLToolbar
, m_initialized(false)
, m_use_VBOs(false)
, m_apply_zoom_to_volumes_filter(false)
, m_hover_volume_id(-1)
, m_legend_texture_enabled(false)
, m_picking_enabled(false)
, m_moving_enabled(false)
@ -1237,6 +1240,7 @@ GLCanvas3D::GLCanvas3D(wxGLCanvas* canvas, Bed3D& bed, Camera& camera, GLToolbar
, m_regenerate_volumes(true)
, m_moving(false)
, m_tab_down(false)
, m_cursor_type(Standard)
, m_color_by("volume")
, m_reload_delayed(false)
, m_render_sla_auxiliaries(true)
@ -1588,6 +1592,10 @@ void GLCanvas3D::render()
if (!_set_current() || !_3DScene::init(m_canvas))
return;
#if ENABLE_RENDER_STATISTICS
auto start_time = std::chrono::high_resolution_clock::now();
#endif // ENABLE_RENDER_STATISTICS
if (m_bed.get_shape().empty())
{
// this happens at startup when no data is still saved under <>\AppData\Roaming\Slic3rPE
@ -1617,8 +1625,15 @@ void GLCanvas3D::render()
wxGetApp().imgui()->new_frame();
// picking pass
_picking_pass();
if (m_picking_enabled)
{
if (m_rectangle_selection.is_dragging())
// picking pass using rectangle selection
_rectangular_selection_picking_pass();
else
// regular picking pass
_picking_pass();
}
// draw scene
glsafe(::glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT));
@ -1654,6 +1669,9 @@ void GLCanvas3D::render()
_render_camera_target();
#endif // ENABLE_SHOW_CAMERA_TARGET
if (m_picking_enabled && m_rectangle_selection.is_dragging())
m_rectangle_selection.render(*this);
// draw overlays
_render_gizmos_overlay();
_render_warning_texture();
@ -1666,9 +1684,26 @@ void GLCanvas3D::render()
if ((m_layers_editing.last_object_id >= 0) && (m_layers_editing.object_max_z() > 0.0f))
m_layers_editing.render_overlay(*this);
#if ENABLE_RENDER_STATISTICS
ImGuiWrapper& imgui = *wxGetApp().imgui();
imgui.set_next_window_bg_alpha(0.5f);
imgui.begin(std::string("Render statistics"), ImGuiWindowFlags_AlwaysAutoResize | ImGuiWindowFlags_NoResize | ImGuiWindowFlags_NoCollapse);
imgui.text("Last frame: ");
ImGui::SameLine();
imgui.text(std::to_string(m_render_stats.last_frame));
ImGui::SameLine();
imgui.text(" ms");
imgui.end();
#endif // ENABLE_RENDER_STATISTICS
wxGetApp().imgui()->render();
m_canvas->SwapBuffers();
#if ENABLE_RENDER_STATISTICS
auto end_time = std::chrono::high_resolution_clock::now();
m_render_stats.last_frame = std::chrono::duration_cast<std::chrono::milliseconds>(end_time - start_time).count();
#endif // ENABLE_RENDER_STATISTICS
}
void GLCanvas3D::select_all()
@ -2365,9 +2400,51 @@ void GLCanvas3D::on_key(wxKeyEvent& evt)
// m_canvas->HandleAsNavigationKey(evt); // XXX: Doesn't work in some cases / on Linux
post_event(SimpleEvent(EVT_GLCANVAS_TAB));
}
else if (keyCode == WXK_SHIFT)
{
if (m_picking_enabled && m_rectangle_selection.is_dragging())
{
_update_selection_from_hover();
m_rectangle_selection.stop_dragging();
m_mouse.ignore_left_up = true;
m_dirty = true;
}
// set_cursor(Standard);
}
else if (keyCode == WXK_ALT)
{
if (m_picking_enabled && m_rectangle_selection.is_dragging())
{
_update_selection_from_hover();
m_rectangle_selection.stop_dragging();
m_mouse.ignore_left_up = true;
m_dirty = true;
}
// set_cursor(Standard);
}
else if (keyCode == WXK_CONTROL)
m_dirty = true;
}
else if (evt.GetEventType() == wxEVT_KEY_DOWN) {
m_tab_down = keyCode == WXK_TAB && !evt.HasAnyModifiers();
if (keyCode == WXK_SHIFT)
{
if (m_picking_enabled && (m_gizmos.get_current_type() != GLGizmosManager::SlaSupports))
{
m_mouse.ignore_left_up = false;
// set_cursor(Cross);
}
}
else if (keyCode == WXK_ALT)
{
if (m_picking_enabled && (m_gizmos.get_current_type() != GLGizmosManager::SlaSupports))
{
m_mouse.ignore_left_up = false;
// set_cursor(Cross);
}
}
else if (keyCode == WXK_CONTROL)
m_dirty = true;
}
}
}
@ -2486,6 +2563,7 @@ void GLCanvas3D::on_mouse(wxMouseEvent& evt)
m_mouse.set_start_position_3D_as_invalid();
m_mouse.set_start_position_2D_as_invalid();
m_mouse.dragging = false;
m_mouse.ignore_left_up = false;
m_dirty = true;
if (m_canvas->HasCapture())
@ -2584,7 +2662,7 @@ void GLCanvas3D::on_mouse(wxMouseEvent& evt)
if (top_level_wnd && top_level_wnd->IsActive())
m_canvas->SetFocus();
m_mouse.position = pos.cast<double>();
// 1) forces a frame render to ensure that m_hover_volume_id is updated even when the user right clicks while
// 1) forces a frame render to ensure that m_hover_volume_idxs is updated even when the user right clicks while
// the context menu is shown, ensuring it to disappear if the mouse is outside any volume and to
// change the volume hover state if any is under the mouse
// 2) when switching between 3d view and preview the size of the canvas changes if the side panels are visible,
@ -2624,26 +2702,35 @@ void GLCanvas3D::on_mouse(wxMouseEvent& evt)
m_dirty = true;
}
}
else if (evt.LeftDown() && (evt.ShiftDown() || evt.AltDown()) && m_picking_enabled)
{
if (m_gizmos.get_current_type() != GLGizmosManager::SlaSupports)
{
m_rectangle_selection.start_dragging(m_mouse.position, evt.ShiftDown() ? GLSelectionRectangle::Select : GLSelectionRectangle::Deselect);
m_dirty = true;
}
}
else
{
// Select volume in this 3D canvas.
// Don't deselect a volume if layer editing is enabled. We want the object to stay selected
// during the scene manipulation.
if (m_picking_enabled && ((m_hover_volume_id != -1) || !is_layers_editing_enabled()))
if (m_picking_enabled && (!m_hover_volume_idxs.empty() || !is_layers_editing_enabled()))
{
if (evt.LeftDown() && (m_hover_volume_id != -1))
if (evt.LeftDown() && !m_hover_volume_idxs.empty())
{
bool already_selected = m_selection.contains_volume(m_hover_volume_id);
int volume_idx = get_first_hover_volume_idx();
bool already_selected = m_selection.contains_volume(volume_idx);
bool ctrl_down = evt.CmdDown();
Selection::IndicesList curr_idxs = m_selection.get_volume_idxs();
if (already_selected && ctrl_down)
m_selection.remove(m_hover_volume_id);
m_selection.remove(volume_idx);
else
{
m_selection.add(m_hover_volume_id, !ctrl_down, true);
m_selection.add(volume_idx, !ctrl_down, true);
m_mouse.drag.move_requires_threshold = !already_selected;
if (already_selected)
m_mouse.set_move_start_threshold_position_2D_as_invalid();
@ -2651,6 +2738,7 @@ void GLCanvas3D::on_mouse(wxMouseEvent& evt)
m_mouse.drag.move_start_threshold_position_2D = pos;
}
// propagate event through callback
if (curr_idxs != m_selection.get_volume_idxs())
{
m_gizmos.refresh_on_off_state(m_selection);
@ -2661,18 +2749,18 @@ void GLCanvas3D::on_mouse(wxMouseEvent& evt)
}
}
// propagate event through callback
if (m_hover_volume_id != -1)
if (!m_hover_volume_idxs.empty())
{
if (evt.LeftDown() && m_moving_enabled && (m_mouse.drag.move_volume_idx == -1))
{
// Only accept the initial position, if it is inside the volume bounding box.
BoundingBoxf3 volume_bbox = m_volumes.volumes[m_hover_volume_id]->transformed_bounding_box();
int volume_idx = get_first_hover_volume_idx();
BoundingBoxf3 volume_bbox = m_volumes.volumes[volume_idx]->transformed_bounding_box();
volume_bbox.offset(1.0);
if (volume_bbox.contains(m_mouse.scene_position))
{
// The dragging operation is initiated.
m_mouse.drag.move_volume_idx = m_hover_volume_id;
m_mouse.drag.move_volume_idx = volume_idx;
m_selection.start_dragging();
m_mouse.drag.start_position_3D = m_mouse.scene_position;
m_moving = true;
@ -2689,7 +2777,7 @@ void GLCanvas3D::on_mouse(wxMouseEvent& evt)
Vec3d cur_pos = m_mouse.drag.start_position_3D;
// we do not want to translate objects if the user just clicked on an object while pressing shift to remove it from the selection and then drag
if (m_selection.contains_volume(m_hover_volume_id))
if (m_selection.contains_volume(get_first_hover_volume_idx()))
{
if (m_camera.get_theta() == 90.0f)
{
@ -2727,10 +2815,14 @@ void GLCanvas3D::on_mouse(wxMouseEvent& evt)
m_regenerate_volumes = false;
m_selection.translate(cur_pos - m_mouse.drag.start_position_3D);
wxGetApp().obj_manipul()->set_dirty();
m_dirty = true;
}
}
else if (evt.Dragging() && evt.LeftIsDown() && m_picking_enabled && m_rectangle_selection.is_dragging())
{
m_rectangle_selection.dragging(pos.cast<double>());
m_dirty = true;
}
else if (evt.Dragging())
{
m_mouse.dragging = true;
@ -2744,10 +2836,11 @@ void GLCanvas3D::on_mouse(wxMouseEvent& evt)
else if (evt.LeftIsDown())
{
// if dragging over blank area with left button, rotate
if ((m_hover_volume_id == -1) && m_mouse.is_start_position_3D_defined())
if (m_hover_volume_idxs.empty() && m_mouse.is_start_position_3D_defined())
{
const Vec3d& orig = m_mouse.drag.start_position_3D;
m_camera.phi += (((float)pos(0) - (float)orig(0)) * TRACKBALLSIZE);
float sign = m_camera.inverted_phi ? -1.0f : 1.0f;
m_camera.phi += sign * ((float)pos(0) - (float)orig(0)) * TRACKBALLSIZE;
m_camera.set_theta(m_camera.get_theta() - ((float)pos(1) - (float)orig(1)) * TRACKBALLSIZE, wxGetApp().preset_bundle->printers.get_edited_preset().printer_technology() != ptSLA);
m_dirty = true;
}
@ -2786,7 +2879,14 @@ void GLCanvas3D::on_mouse(wxMouseEvent& evt)
// of the scene with the background processing data should be performed.
post_event(SimpleEvent(EVT_GLCANVAS_MOUSE_DRAGGING_FINISHED));
}
else if (evt.LeftUp() && !m_mouse.dragging && (m_hover_volume_id == -1) && !is_layers_editing_enabled())
else if (evt.LeftUp() && m_picking_enabled && m_rectangle_selection.is_dragging())
{
if (evt.ShiftDown() || evt.AltDown())
_update_selection_from_hover();
m_rectangle_selection.stop_dragging();
}
else if (evt.LeftUp() && !m_mouse.ignore_left_up && !m_mouse.dragging && m_hover_volume_idxs.empty() && !is_layers_editing_enabled())
{
// deselect and propagate event through callback
if (!evt.ShiftDown() && m_picking_enabled)
@ -2799,21 +2899,24 @@ void GLCanvas3D::on_mouse(wxMouseEvent& evt)
post_event(SimpleEvent(EVT_GLCANVAS_OBJECT_SELECT));
}
}
else if (evt.LeftUp() && m_mouse.dragging)
// Flips X mouse deltas if bed is upside down
m_camera.inverted_phi = (m_camera.get_dir_up()(2) < 0.0);
else if (evt.RightUp())
{
m_mouse.position = pos.cast<double>();
// forces a frame render to ensure that m_hover_volume_id is updated even when the user right clicks while
// forces a frame render to ensure that m_hover_volume_idxs is updated even when the user right clicks while
// the context menu is already shown
render();
if (m_hover_volume_id != -1)
if (!m_hover_volume_idxs.empty())
{
// if right clicking on volume, propagate event through callback (shows context menu)
if (m_volumes.volumes[m_hover_volume_id]->hover
&& !m_volumes.volumes[m_hover_volume_id]->is_wipe_tower // no context menu for the wipe tower
int volume_idx = get_first_hover_volume_idx();
if (!m_volumes.volumes[volume_idx]->is_wipe_tower // no context menu for the wipe tower
&& m_gizmos.get_current_type() != GLGizmosManager::SlaSupports) // disable context menu when the gizmo is open
{
// forces the selection of the volume
m_selection.add(m_hover_volume_id);
m_selection.add(volume_idx);
m_gizmos.refresh_on_off_state(m_selection);
post_event(SimpleEvent(EVT_GLCANVAS_OBJECT_SELECT));
m_gizmos.update_data(*this);
@ -3213,6 +3316,20 @@ double GLCanvas3D::get_size_proportional_to_max_bed_size(double factor) const
return factor * m_bed.get_bounding_box().max_size();
}
void GLCanvas3D::set_cursor(ECursorType type)
{
if ((m_canvas != nullptr) && (m_cursor_type != type))
{
switch (type)
{
case Standard: { m_canvas->SetCursor(*wxSTANDARD_CURSOR); break; }
case Cross: { m_canvas->SetCursor(*wxCROSS_CURSOR); break; }
}
m_cursor_type = type;
}
}
void GLCanvas3D::msw_rescale()
{
m_warning_texture.msw_rescale(*this);
@ -3391,7 +3508,7 @@ bool GLCanvas3D::_init_toolbar()
item.name = "layersediting";
#if ENABLE_SVG_ICONS
item.icon_filename = "layers.svg";
item.icon_filename = "layers_white.svg";
#endif // ENABLE_SVG_ICONS
item.tooltip = GUI::L_str("Layers editing");
item.sprite_id = 10;
@ -3583,10 +3700,10 @@ void GLCanvas3D::_refresh_if_shown_on_screen()
void GLCanvas3D::_picking_pass() const
{
const Vec2d& pos = m_mouse.position;
if (m_picking_enabled && !m_mouse.dragging && (pos != Vec2d(DBL_MAX, DBL_MAX)))
if (m_picking_enabled && !m_mouse.dragging && (m_mouse.position != Vec2d(DBL_MAX, DBL_MAX)))
{
m_hover_volume_idxs.clear();
// Render the object for picking.
// FIXME This cannot possibly work in a multi - sampled context as the color gets mangled by the anti - aliasing.
// Better to use software ray - casting on a bounding - box hierarchy.
@ -3617,27 +3734,98 @@ void GLCanvas3D::_picking_pass() const
GLubyte color[4] = { 0, 0, 0, 0 };
const Size& cnv_size = get_canvas_size();
bool inside = (0 <= pos(0)) && (pos(0) < cnv_size.get_width()) && (0 <= pos(1)) && (pos(1) < cnv_size.get_height());
bool inside = (0 <= m_mouse.position(0)) && (m_mouse.position(0) < cnv_size.get_width()) && (0 <= m_mouse.position(1)) && (m_mouse.position(1) < cnv_size.get_height());
if (inside)
{
glsafe(::glReadPixels(pos(0), cnv_size.get_height() - pos(1) - 1, 1, 1, GL_RGBA, GL_UNSIGNED_BYTE, (void*)color));
volume_id = color[0] + color[1] * 256 + color[2] * 256 * 256;
glsafe(::glReadPixels(m_mouse.position(0), cnv_size.get_height() - m_mouse.position(1) - 1, 1, 1, GL_RGBA, GL_UNSIGNED_BYTE, (void*)color));
volume_id = color[0] + (color[1] << 8) + (color[2] << 16);
}
if ((0 <= volume_id) && (volume_id < (int)m_volumes.volumes.size()))
{
m_hover_volume_id = volume_id;
m_hover_volume_idxs.push_back(volume_id);
m_gizmos.set_hover_id(-1);
}
else
{
m_hover_volume_id = -1;
m_gizmos.set_hover_id(inside && volume_id <= GLGizmoBase::BASE_ID ? (GLGizmoBase::BASE_ID - volume_id) : -1);
}
_update_volumes_hover_state();
}
}
void GLCanvas3D::_rectangular_selection_picking_pass() const
{
m_gizmos.set_hover_id(-1);
std::set<int> idxs;
if (m_picking_enabled)
{
if (m_multisample_allowed)
glsafe(::glDisable(GL_MULTISAMPLE));
glsafe(::glDisable(GL_BLEND));
glsafe(::glEnable(GL_DEPTH_TEST));
glsafe(::glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT));
_render_volumes_for_picking();
if (m_multisample_allowed)
glsafe(::glEnable(GL_MULTISAMPLE));
int width = std::max((int)m_rectangle_selection.get_width(), 1);
int height = std::max((int)m_rectangle_selection.get_height(), 1);
int px_count = width * height;
int left = (int)m_rectangle_selection.get_left();
int top = get_canvas_size().get_height() - (int)m_rectangle_selection.get_top();
if ((left >= 0) && (top >= 0))
{
#define USE_PARALLEL 1
#if USE_PARALLEL
struct Pixel
{
std::array<GLubyte, 4> data;
int id() const { return data[0] + (data[1] << 8) + (data[2] << 16); }
};
std::vector<Pixel> frame(px_count);
glsafe(::glReadPixels(left, top, width, height, GL_RGBA, GL_UNSIGNED_BYTE, (void*)frame.data()));
tbb::spin_mutex mutex;
tbb::parallel_for(tbb::blocked_range<size_t>(0, frame.size(), (size_t)width),
[this, &frame, &idxs, &mutex](const tbb::blocked_range<size_t>& range) {
for (size_t i = range.begin(); i < range.end(); ++i)
{
int volume_id = frame[i].id();
if ((0 <= volume_id) && (volume_id < (int)m_volumes.volumes.size()))
{
mutex.lock();
idxs.insert(volume_id);
mutex.unlock();
}
}
}
);
#else
std::vector<GLubyte> frame(4 * px_count);
glsafe(::glReadPixels(left, top, width, height, GL_RGBA, GL_UNSIGNED_BYTE, (void*)frame.data()));
for (int i = 0; i < px_count; ++i)
{
int px_id = 4 * i;
int volume_id = frame[px_id] + (frame[px_id + 1] << 8) + (frame[px_id + 2] << 16);
if ((0 <= volume_id) && (volume_id < (int)m_volumes.volumes.size()))
idxs.insert(volume_id);
}
#endif // USE_PARALLEL
}
}
m_hover_volume_idxs.assign(idxs.begin(), idxs.end());
_update_volumes_hover_state();
}
void GLCanvas3D::_render_background() const
{
glsafe(::glPushMatrix());
@ -4123,24 +4311,93 @@ void GLCanvas3D::_update_volumes_hover_state() const
{
for (GLVolume* v : m_volumes.volumes)
{
v->hover = false;
v->hover = GLVolume::HS_None;
}
if (m_hover_volume_id == -1)
if (m_hover_volume_idxs.empty())
return;
GLVolume* volume = m_volumes.volumes[m_hover_volume_id];
if (volume->is_modifier)
volume->hover = true;
else
{
int object_idx = volume->object_idx();
int instance_idx = volume->instance_idx();
bool ctrl_pressed = wxGetKeyState(WXK_CONTROL); // additive select/deselect
bool shift_pressed = wxGetKeyState(WXK_SHIFT); // select by rectangle
bool alt_pressed = wxGetKeyState(WXK_ALT); // deselect by rectangle
for (GLVolume* v : m_volumes.volumes)
if (alt_pressed && (shift_pressed || ctrl_pressed))
{
// illegal combinations of keys
m_hover_volume_idxs.clear();
return;
}
bool selection_modifiers_only = m_selection.is_empty() || m_selection.is_any_modifier();
bool hover_modifiers_only = true;
for (int i : m_hover_volume_idxs)
{
if (!m_volumes.volumes[i]->is_modifier)
{
if ((v->object_idx() == object_idx) && (v->instance_idx() == instance_idx))
v->hover = true;
hover_modifiers_only = false;
break;
}
}
std::set<std::pair<int, int>> hover_instances;
for (int i : m_hover_volume_idxs)
{
const GLVolume& v = *m_volumes.volumes[i];
hover_instances.insert(std::make_pair(v.object_idx(), v.instance_idx()));
}
bool hover_from_single_instance = hover_instances.size() == 1;
if (hover_modifiers_only && !hover_from_single_instance)
{
// do not allow to select volumes from different instances
m_hover_volume_idxs.clear();
return;
}
for (int i : m_hover_volume_idxs)
{
GLVolume& volume = *m_volumes.volumes[i];
if (volume.hover != GLVolume::HS_None)
continue;
bool deselect = volume.selected && ((ctrl_pressed && !shift_pressed) || alt_pressed);
// (volume->is_modifier && !selection_modifiers_only && !is_ctrl_pressed) -> allows hovering on selected modifiers belonging to selection of type Instance
bool select = (!volume.selected || (volume.is_modifier && !selection_modifiers_only && !ctrl_pressed)) && !alt_pressed;
if (select || deselect)
{
bool as_volume =
volume.is_modifier && hover_from_single_instance && !ctrl_pressed &&
(
(!deselect) ||
(deselect && !m_selection.is_single_full_instance() && (volume.object_idx() == m_selection.get_object_idx()) && (volume.instance_idx() == m_selection.get_instance_idx()))
);
if (as_volume)
{
if (deselect)
volume.hover = GLVolume::HS_Deselect;
else
volume.hover = GLVolume::HS_Select;
}
else
{
int object_idx = volume.object_idx();
int instance_idx = volume.instance_idx();
for (GLVolume* v : m_volumes.volumes)
{
if ((v->object_idx() == object_idx) && (v->instance_idx() == instance_idx))
{
if (deselect)
v->hover = GLVolume::HS_Deselect;
else
v->hover = GLVolume::HS_Select;
}
}
}
}
}
}
@ -5419,6 +5676,55 @@ void GLCanvas3D::_resize_toolbars() const
}
#endif // !ENABLE_SVG_ICONS
void GLCanvas3D::_update_selection_from_hover()
{
bool ctrl_pressed = wxGetKeyState(WXK_CONTROL);
if (m_hover_volume_idxs.empty())
{
if (!ctrl_pressed && (m_rectangle_selection.get_state() == GLSelectionRectangle::Select))
m_selection.clear();
return;
}
GLSelectionRectangle::EState state = m_rectangle_selection.get_state();
bool hover_modifiers_only = true;
for (int i : m_hover_volume_idxs)
{
if (!m_volumes.volumes[i]->is_modifier)
{
hover_modifiers_only = false;
break;
}
}
if ((state == GLSelectionRectangle::Select) && !ctrl_pressed)
m_selection.clear();
for (int i : m_hover_volume_idxs)
{
if (state == GLSelectionRectangle::Select)
{
if (hover_modifiers_only)
{
const GLVolume& v = *m_volumes.volumes[i];
m_selection.add_volume(v.object_idx(), v.volume_idx(), v.instance_idx(), false);
}
else
m_selection.add(i, false);
}
else
m_selection.remove(i);
}
m_gizmos.refresh_on_off_state(m_selection);
m_gizmos.update_data(*this);
post_event(SimpleEvent(EVT_GLCANVAS_OBJECT_SELECT));
m_dirty = true;
}
const Print* GLCanvas3D::fff_print() const
{
return (m_process == nullptr) ? nullptr : m_process->fff_print();