feat: Implement fill bucket edition mode

src/containers/grid_3d.h

@@ -1,12 +1,12 @@
 #ifndef ISOMETRIC_MAPS_GRID_3D_H
 #define ISOMETRIC_MAPS_GRID_3D_H
 
-#include <core/templates/vector.h>
-#include <core/variant/array.h>
-
 #include <core/math/aabb.h>
 #include <core/math/vector3.h>
 #include <core/math/vector3i.h>
+#include <core/templates/hash_set.h>
+#include <core/templates/vector.h>
+#include <core/variant/array.h>
 
 namespace containers {
 
@@ -25,6 +25,9 @@ namespace containers {
 
         Vector3 plane_square_and_jumps_from(const Vector3& size) const;
 
+        template<bool (*condition)(T)>
+        bool match_condition_on_one_of(const AABB& aabb) const;
+
         inline int compute_array_size() const { return width * depth * height; }
 
         static int index_increment_from(const Vector3& planeSquareAndJumps, const Vector3& size, int iteration);
@@ -76,6 +79,13 @@ namespace containers {
 
         Array to_array() const;
         void from_array(const Array& array);
+
+        template<bool (*condition)(T)> Vector<Vector3> dfs(
+          const Vector3& p_starting_position,
+          Vector3::Axis p_axis,
+          const Vector3& p_unit_size,
+          HashSet<Vector3>* p_visited = nullptr
+        ) const;
     };
 
     template<class T, T default_value>
@@ -202,17 +212,26 @@ namespace containers {
 
     template<class T, T default_value>
     bool Grid3D<T, default_value>::is_overlapping(const AABB& aabb) const {
+        static constexpr bool (*condition)(T) = [](T element) -> bool {
+            return element != nullptr;
+        };
+        return match_condition_on_one_of<condition>(aabb);
+    }
+
+    template<class T, T default_value>
+    template<bool (*condition)(T)>
+    bool Grid3D<T, default_value>::match_condition_on_one_of(const AABB& aabb) const {
         int index {get_index_from_position(aabb.position)};
         const Vector3& size {aabb.size};
 
         if (index >= 0 && index < internal_array.size()) {
             T element = internal_array[index];
-            if (element) { return true; }
+            if (condition(element)) { return true; }
             for (int i = 1; i < static_cast<int>(size.x) * static_cast<int>(size.y) * static_cast<int>(size.z); ++i) {
                 index += Grid3D::index_increment_from(plane_square_and_jumps_from(size), size, i);
                 if (index >= 0 && index < internal_array.size()) {
                     element = internal_array[index];
-                    if (element) { return true; }
+                    if (condition(element)) { return true; }
                 }
             }
         }
@@ -330,6 +349,83 @@ namespace containers {
         }
         set_internal_array(new_internal_array);
     }
+
+    template<class T, T default_value>
+    template<bool (*condition)(T)>
+    Vector<Vector3> Grid3D<T, default_value>::dfs(
+      const Vector3& p_starting_position,
+      Vector3::Axis p_axis,
+      const Vector3& p_unit_size,
+      HashSet<Vector3>* p_visited
+    ) const {
+        static constexpr bool (*revert_condition)(T) = [](T element) -> bool {
+            return !condition(element);
+        };
+
+        Vector<Vector3> connected_positions;
+
+        HashSet<Vector3> visited_fallback;
+        HashSet<Vector3>* visited { p_visited == nullptr ? &visited_fallback : p_visited };
+
+        Vector<int> dx;
+        Vector<int> dy;
+        Vector<int> dz;
+
+        auto size_on_x {static_cast<int>(p_unit_size.x)};
+        auto size_on_y {static_cast<int>(p_unit_size.y)};
+        auto size_on_z {static_cast<int>(p_unit_size.z)};
+
+        switch (p_axis) {
+            case Vector3::AXIS_X:
+                dx.append_array({0, 0, 0, 0});
+                dy.append_array({-size_on_y, size_on_y, 0, 0});
+                dz.append_array({0, 0, -size_on_z, size_on_z});
+                break;
+            case Vector3::AXIS_Y:
+                dx.append_array({-size_on_x, size_on_x, 0, 0});
+                dy.append_array({0, 0, 0, 0});
+                dz.append_array({0, 0, -size_on_z, size_on_z});
+                break;
+            case Vector3::AXIS_Z:
+                dx.append_array({-size_on_x, size_on_x, 0, 0});
+                dy.append_array({0, 0, -size_on_y, size_on_y});
+                dz.append_array({0, 0, 0, 0});
+                break;
+        }
+
+        Vector<Vector3> stack;
+        stack.push_back(p_starting_position);
+        visited->insert(p_starting_position);
+
+        while (!stack.is_empty()) {
+            Vector3 current_position {stack[stack.size() - 1]};
+            stack.remove_at(stack.size() - 1);
+
+            if (current_position.x < 0 || current_position.y < 0 || current_position.z < 0 ||
+                current_position.x >= width || current_position.y >= depth || current_position.z >= height) {
+                continue;
+            }
+
+            AABB aabb {current_position, p_unit_size};
+            if (match_condition_on_one_of<revert_condition>(aabb)) {
+                continue;
+            }
+            connected_positions.append(current_position);
+
+            for (int i = 0; i < 4; ++i) {
+                Vector3 neighbor { current_position + Vector3(dx[i], dy[i], dz[i]) };
+
+                if (visited->has(neighbor)) {
+                    continue;
+                }
+
+                stack.push_back(neighbor);
+                visited->insert(neighbor);
+            }
+        }
+
+        return connected_positions;
+    }
 
     template<class T, T default_value>
     Grid3D<T, default_value>::Grid3D() {

src/editor/commands/emitters/fill_plan_command_emitter.cpp

@@ -0,0 +1,71 @@
+#ifdef TOOLS_ENABLED
+
+#include "fill_plan_command_emitter.h"
+
+#include "editor/isometric_editor_plugin.h"
+#include "isometric_server.h"
+#include "utils/isometric_maths.h"
+
+using namespace editor::commands::emitters;
+
+static constexpr bool (*condition)(node::IsometricPositionable*) = [](node::IsometricPositionable* positionable) -> bool {
+    return positionable == nullptr;
+};
+
+Vector<Ref<editor::commands::Command<node::IsometricMap>>> FillPlanCommandEmitter::from_gui_input_to_command_impl(Ref<InputEventMouse> p_event) {
+    Vector<Ref<Command<node::IsometricMap>>> commands;
+
+    if (!Input::get_singleton()->is_mouse_button_pressed(MouseButton::LEFT)) {
+        return commands;
+    }
+
+    IsometricEditorPlugin* isometric_editor_plugin { IsometricEditorPlugin::get_instance() };
+
+    int selected_tile_id {isometric_editor_plugin->get_selection_pane()->get_selected_positionable_id()};
+
+    if (selected_tile_id == resource::PositionableSet::NONE_POSITIONABLE_ID) { return commands; }
+
+    node::IsometricMap* map { isometric_editor_plugin->get_selected_map() };
+    const EditorPlane& editor_plane {
+      isometric_editor_plugin->get_editor_plane_for_map(map, EditorPlane::PlaneType::EDITOR_DRAWER)
+    };
+
+    Vector3::Axis editor_plane_axis { editor_plane.get_axis() };
+
+    const data::IsometricParameters* parameters {IsometricServer::get_instance()->space_get_configuration(map->get_space_RID())};
+
+    const Vector3& position {
+      utils::from_screen_to_3D(
+        *parameters,
+        map->get_local_mouse_position(),
+        editor_plane_axis,
+        static_cast<float>(editor_plane.get_position())
+      )
+    };
+
+    Vector3 positionable_size;
+    if (auto* positionable {Object::cast_to<node::IsometricPositionable>(
+          map->get_positionable_set()->get_positionable_scene_for_id(selected_tile_id)->instantiate()
+        )}) {
+        positionable_size = positionable->get_size();
+        memdelete(positionable);
+    } else {
+        return commands;
+    }
+
+    Vector<Vector3> connected_positions_with_no_elements { map->dfs<condition>(position, editor_plane_axis, positionable_size) };
+
+    for (const Vector3& connected_position : connected_positions_with_no_elements) {
+        Ref<editor::commands::AddPositionableCommand> add_command;
+        add_command.instantiate();
+        add_command->set_aabb({connected_position, positionable_size});
+        add_command->set_positionable_id(selected_tile_id);
+        add_command->set_layer_id(IsometricEditorPlugin::get_instance()->get_selected_layer());
+        commands.push_back(add_command);
+    }
+
+    return commands;
+}
+
+
+#endif

src/editor/commands/emitters/fill_plan_command_emitter.h

@@ -0,0 +1,32 @@
+#ifndef ISOMETRIC_MAPS_FILL_PLAN_COMMAND_EMITTER_H
+#define ISOMETRIC_MAPS_FILL_PLAN_COMMAND_EMITTER_H
+
+#ifdef TOOLS_ENABLED
+
+#include "command_emitter.h"
+#include "node/isometric_map.h"
+
+#include <core/input/input_event.h>
+
+namespace editor {
+    namespace commands {
+        namespace emitters {
+            static constexpr const char fill_plan_action_name[]{"Fill plan with elements"};
+
+            class FillPlanCommandEmitter : public CommandEmitter<FillPlanCommandEmitter, InputEventMouse, node::IsometricMap, fill_plan_action_name> {
+                friend class CommandEmitter<FillPlanCommandEmitter, InputEventMouse, node::IsometricMap, fill_plan_action_name>;
+
+            public:
+                FillPlanCommandEmitter() = default;
+                ~FillPlanCommandEmitter() = default;
+
+            private:
+                Vector<Ref<Command<node::IsometricMap>>> from_gui_input_to_command_impl([[maybe_unused]] Ref<InputEventMouse> p_event);
+            };
+        }
+    }
+}
+
+#endif
+
+#endif// ISOMETRIC_MAPS_FILL_PLAN_COMMAND_EMITTER_H

src/editor/isometric_editor_plugin.cpp

@@ -19,6 +19,7 @@ static constexpr const char* NONE_EDITION_LABEL {"None"};
 static constexpr const char* SELECT_EDITION_LABEL {"Select"};
 static constexpr const char* PAINT_EDITION_LABEL {"Paint"};
 static constexpr const char* DRAG_AND_DROP_EDITION_LABEL {"Drag & Drop"};
+static constexpr const char* FILL_EDITION_LABEL {"Fill"};
 static constexpr const char* GRID_COLOR_PICKER_TITLE {"Grid color:"};
 
 static constexpr const char* DEBUG_BUTTON_TITLE {"Debug"};
@@ -94,6 +95,7 @@ void IsometricEditorPlugin::_notification(int p_notification) {
         edition_mode_button->add_item(SELECT_EDITION_LABEL);
         edition_mode_button->add_item(PAINT_EDITION_LABEL);
         edition_mode_button->add_item(DRAG_AND_DROP_EDITION_LABEL);
+        edition_mode_button->add_item(FILL_EDITION_LABEL);
         edition_mode_button->set_flat(true);
         edition_mode_button->connect("item_selected", Callable(this, "_on_edition_mode_changed"));
         toolbar->add_child(edition_mode_button);
@@ -248,6 +250,8 @@ bool IsometricEditorPlugin::forward_canvas_gui_input(const Ref<InputEvent>& p_ev
         case DRAG_AND_DROP:
             drag_and_drop_command_emitter.on_gui_input(p_event, selected_map);
             break;
+        case FILL:
+            fill_plan_command_emitter.on_gui_input(p_event, selected_map);
     }
     move_editor_drawer_command_emitter.on_gui_input(p_event, selected_map);
     rotate_editor_plane_command_emitter.on_gui_input(p_event, selected_map);
@@ -369,6 +373,8 @@ void IsometricEditorPlugin::_on_edition_mode_changed(int selected_index) {
         current_mode = Mode::PAINT;
     } else if (selected_label == DRAG_AND_DROP_EDITION_LABEL) {
         current_mode = Mode::DRAG_AND_DROP;
+    } else if (selected_label == FILL_EDITION_LABEL) {
+        current_mode = Mode::FILL;
     }
 }
 

src/editor/isometric_editor_plugin.h

@@ -7,6 +7,7 @@
 #include "edition_grid_drawer.h"
 #include "editor/commands/emitters/delete_command_emitter.h"
 #include "editor/commands/emitters/drag_and_drop_command_emitter.h"
+#include "editor/commands/emitters/fill_plan_command_emitter.h"
 #include "editor/commands/emitters/move_editor_grid_command_emitter.h"
 #include "editor/commands/emitters/move_editor_view_limiter_command_emitter.h"
 #include "editor/commands/emitters/move_selection_command_emitter.h"
@@ -34,7 +35,8 @@ namespace editor {
             NONE,
             SELECT,
             PAINT,
-            DRAG_AND_DROP
+            DRAG_AND_DROP,
+            FILL
         };
 
         editor::inspector::PositionableSelectionPane* get_selection_pane() const;
@@ -106,6 +108,7 @@ namespace editor {
         commands::emitters::DeleteCommandEmitter delete_command_emitter;
         commands::emitters::MoveSelectionCommandEmitter move_selection_command_emitter;
         commands::emitters::DragAndDropCommandEmitter drag_and_drop_command_emitter;
+        commands::emitters::FillPlanCommandEmitter fill_plan_command_emitter;
         commands::emitters::MoveEditorGridCommandEmitter move_editor_drawer_command_emitter;
         commands::emitters::RotateEditorPlaneCommandEmitter rotate_editor_plane_command_emitter;
         commands::emitters::MoveEditorViewLimiterCommandEmitter plane_view_limiter_command_emitter;

src/node/isometric_map.h

@@ -79,6 +79,9 @@ namespace node {
         void set_layer_visible(uint32_t p_layer_id, bool is_visible);
         void set_layer_color(uint32_t p_layer_id, const Color& p_color);
         Vector<Vector3> get_layer_positions(uint32_t p_layer_id) const;
+
+        template<bool (*condition)(node::IsometricPositionable*)>
+        Vector<Vector3> dfs(const Vector3& p_starting_position, Vector3::Axis p_axis, const Vector3& p_unit_size) const;
 #endif
 #ifdef DEBUG_ENABLED
         void set_debug_modulate(const Color &p_modulate) const override;
@@ -91,5 +94,12 @@ namespace node {
     protected:
         static void _bind_methods();
     };
+
+#ifdef TOOLS_ENABLED
+    template<bool (*condition)(node::IsometricPositionable*)>
+    Vector<Vector3> IsometricMap::dfs(const Vector3& p_starting_position, Vector3::Axis p_axis, const Vector3& p_unit_size) const {
+        return instances_grid_3d.dfs<condition>(p_starting_position, p_axis, p_unit_size);
+    }
+#endif
 }// namespace node
 #endif// ISOMETRIC_MAPS_ISOMETRIC_MAP_H