Added (AI generated) raycaster and tank controls

.gitignore

@@ -0,0 +1,45 @@
+# Miscellaneous
+*.class
+*.log
+*.pyc
+*.swp
+.DS_Store
+.atom/
+.build/
+.buildlog/
+.history
+.svn/
+.swiftpm/
+migrate_working_dir/
+
+# IntelliJ related
+*.iml
+*.ipr
+*.iws
+.idea/
+
+# The .vscode folder contains launch configuration and tasks you configure in
+# VS Code which you may wish to be included in version control, so this line
+# is commented out by default.
+#.vscode/
+
+# Flutter/Dart/Pub related
+**/doc/api/
+**/ios/Flutter/.last_build_id
+.dart_tool/
+.flutter-plugins-dependencies
+.pub-cache/
+.pub/
+/build/
+/coverage/
+
+# Symbolication related
+app.*.symbols
+
+# Obfuscation related
+app.*.map.json
+
+# Android Studio will place build artifacts here
+/android/app/debug
+/android/app/profile
+/android/app/release

.metadata

@@ -0,0 +1,45 @@
+# This file tracks properties of this Flutter project.
+# Used by Flutter tool to assess capabilities and perform upgrades etc.
+#
+# This file should be version controlled and should not be manually edited.
+
+version:
+  revision: "ff37bef603469fb030f2b72995ab929ccfc227f0"
+  channel: "stable"
+
+project_type: app
+
+# Tracks metadata for the flutter migrate command
+migration:
+  platforms:
+    - platform: root
+      create_revision: ff37bef603469fb030f2b72995ab929ccfc227f0
+      base_revision: ff37bef603469fb030f2b72995ab929ccfc227f0
+    - platform: android
+      create_revision: ff37bef603469fb030f2b72995ab929ccfc227f0
+      base_revision: ff37bef603469fb030f2b72995ab929ccfc227f0
+    - platform: ios
+      create_revision: ff37bef603469fb030f2b72995ab929ccfc227f0
+      base_revision: ff37bef603469fb030f2b72995ab929ccfc227f0
+    - platform: linux
+      create_revision: ff37bef603469fb030f2b72995ab929ccfc227f0
+      base_revision: ff37bef603469fb030f2b72995ab929ccfc227f0
+    - platform: macos
+      create_revision: ff37bef603469fb030f2b72995ab929ccfc227f0
+      base_revision: ff37bef603469fb030f2b72995ab929ccfc227f0
+    - platform: web
+      create_revision: ff37bef603469fb030f2b72995ab929ccfc227f0
+      base_revision: ff37bef603469fb030f2b72995ab929ccfc227f0
+    - platform: windows
+      create_revision: ff37bef603469fb030f2b72995ab929ccfc227f0
+      base_revision: ff37bef603469fb030f2b72995ab929ccfc227f0
+
+  # User provided section
+
+  # List of Local paths (relative to this file) that should be
+  # ignored by the migrate tool.
+  #
+  # Files that are not part of the templates will be ignored by default.
+  unmanaged_files:
+    - 'lib/main.dart'
+    - 'ios/Runner.xcodeproj/project.pbxproj'

.vscode/launch.json

@@ -0,0 +1,25 @@
+{
+  // Use IntelliSense to learn about possible attributes.
+  // Hover to view descriptions of existing attributes.
+  // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+  "version": "0.2.0",
+  "configurations": [
+    {
+      "name": "wolf_dart",
+      "request": "launch",
+      "type": "dart"
+    },
+    {
+      "name": "wolf_dart (profile mode)",
+      "request": "launch",
+      "type": "dart",
+      "flutterMode": "profile"
+    },
+    {
+      "name": "wolf_dart (release mode)",
+      "request": "launch",
+      "type": "dart",
+      "flutterMode": "release"
+    }
+  ]
+}

README.md

@@ -0,0 +1,3 @@
+# wolf_dart
+
+A new Flutter project.

analysis_options.yaml

@@ -0,0 +1 @@
+include: package:flutter_lints/flutter.yaml

lib/main.dart

@@ -0,0 +1,337 @@
+import 'dart:math' as math;
+
+import 'package:flutter/material.dart';
+import 'package:flutter/scheduler.dart';
+import 'package:flutter/services.dart';
+
+void main() => runApp(const MaterialApp(home: WolfRenderer()));
+
+typedef LinearCoordinates = ({double x, double y});
+
+class WolfRenderer extends StatefulWidget {
+  const WolfRenderer({super.key});
+
+  @override
+  State<WolfRenderer> createState() => _WolfRendererState();
+}
+
+class _WolfRendererState extends State<WolfRenderer>
+    with SingleTickerProviderStateMixin {
+  late Ticker _gameLoop;
+  final FocusNode _focusNode = FocusNode();
+
+  final List<List<int>> map = [
+    [1, 1, 1, 1, 1, 1, 1, 1],
+    [1, 0, 0, 0, 0, 0, 0, 1],
+    [1, 0, 1, 0, 0, 1, 0, 1],
+    [1, 0, 1, 0, 0, 1, 0, 1],
+    [1, 0, 0, 0, 0, 0, 0, 1],
+    [1, 1, 1, 1, 1, 1, 1, 1],
+  ];
+
+  LinearCoordinates player = (x: 2.5, y: 2.5);
+  double playerAngle = 0.0;
+  final double fov = math.pi / 3;
+
+  @override
+  void initState() {
+    super.initState();
+    _bumpPlayerIfStuck();
+
+    _gameLoop = createTicker(_tick)..start();
+    _focusNode.requestFocus();
+  }
+
+  @override
+  void dispose() {
+    _gameLoop.dispose();
+    _focusNode.dispose();
+    super.dispose();
+  }
+
+  void _bumpPlayerIfStuck() {
+    int pX = player.x.toInt();
+    int pY = player.y.toInt();
+
+    if (pY < 0 ||
+        pY >= map.length ||
+        pX < 0 ||
+        pX >= map[0].length ||
+        map[pY][pX] > 0) {
+      double shortestDist = double.infinity;
+      LinearCoordinates nearestSafeSpot = (x: 1.5, y: 1.5);
+
+      for (int y = 0; y < map.length; y++) {
+        for (int x = 0; x < map[y].length; x++) {
+          if (map[y][x] == 0) {
+            double safeX = x + 0.5;
+            double safeY = y + 0.5;
+            double dist = math.sqrt(
+              math.pow(safeX - player.x, 2) + math.pow(safeY - player.y, 2),
+            );
+
+            if (dist < shortestDist) {
+              shortestDist = dist;
+              nearestSafeSpot = (x: safeX, y: safeY);
+            }
+          }
+        }
+      }
+      player = nearestSafeSpot;
+    }
+  }
+
+  // Updated Movement Logic
+  void _tick(Duration elapsed) {
+    const double moveSpeed = 0.05;
+    const double turnSpeed = 0.04; // Added a dedicated turning speed
+
+    double newX = player.x;
+    double newY = player.y;
+
+    final pressedKeys = HardwareKeyboard.instance.logicalKeysPressed;
+
+    if (pressedKeys.contains(LogicalKeyboardKey.keyW)) {
+      newX += math.cos(playerAngle) * moveSpeed;
+      newY += math.sin(playerAngle) * moveSpeed;
+    }
+    if (pressedKeys.contains(LogicalKeyboardKey.keyS)) {
+      newX -= math.cos(playerAngle) * moveSpeed;
+      newY -= math.sin(playerAngle) * moveSpeed;
+    }
+
+    if (pressedKeys.contains(LogicalKeyboardKey.keyA)) {
+      playerAngle -= turnSpeed;
+    }
+    if (pressedKeys.contains(LogicalKeyboardKey.keyD)) {
+      playerAngle += turnSpeed;
+    }
+
+    // Keep the angle mapped cleanly between 0 and 2*PI (optional, but good practice)
+    if (playerAngle < 0) playerAngle += 2 * math.pi;
+    if (playerAngle > 2 * math.pi) playerAngle -= 2 * math.pi;
+
+    if (map[newY.toInt()][newX.toInt()] == 0) {
+      player = (x: newX, y: newY);
+    }
+
+    setState(() {});
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      backgroundColor: Colors.black,
+      body: KeyboardListener(
+        focusNode: _focusNode,
+        autofocus: true,
+        onKeyEvent: (_) {},
+        child: LayoutBuilder(
+          builder: (context, constraints) {
+            return CustomPaint(
+              size: Size(constraints.maxWidth, constraints.maxHeight),
+              painter: RaycasterPainter(
+                map: map,
+                player: player,
+                playerAngle: playerAngle,
+                fov: fov,
+              ),
+            );
+          },
+        ),
+      ),
+    );
+  }
+}
+
+class RaycasterPainter extends CustomPainter {
+  final List<List<int>> map;
+  final LinearCoordinates player;
+  final double playerAngle;
+  final double fov;
+
+  RaycasterPainter({
+    required this.map,
+    required this.player,
+    required this.playerAngle,
+    required this.fov,
+  });
+
+  @override
+  void paint(Canvas canvas, Size size) {
+    // 1. Draw Ceiling & Floor
+    canvas.drawRect(
+      Rect.fromLTWH(0, 0, size.width, size.height / 2),
+      Paint()..color = Colors.blueGrey[900]!,
+    );
+    canvas.drawRect(
+      Rect.fromLTWH(0, size.height / 2, size.width, size.height / 2),
+      Paint()..color = Colors.brown[900]!,
+    );
+
+    int screenWidth = size.width.toInt();
+
+    // 2. Camera Plane Setup
+    // Direction vector of the player
+    double dirX = math.cos(playerAngle);
+    double dirY = math.sin(playerAngle);
+
+    // The camera plane is perpendicular to the direction vector.
+    // Multiplying by tan(fov/2) scales the plane to match our field of view.
+    double planeX = -dirY * math.tan(fov / 2);
+    double planeY = dirX * math.tan(fov / 2);
+
+    for (int x = 0; x < screenWidth; x++) {
+      // Calculate where on the camera plane this ray passes (-1 is left edge, 1 is right edge)
+      double cameraX = 2 * x / screenWidth - 1.0;
+      double rayDirX = dirX + planeX * cameraX;
+      double rayDirY = dirY + planeY * cameraX;
+
+      // Current map box we are in
+      int mapX = player.x.toInt();
+      int mapY = player.y.toInt();
+
+      // Length of ray from current position to next x or y-side
+      double sideDistX;
+      double sideDistY;
+
+      // Length of ray from one x or y-side to next x or y-side
+      double deltaDistX = (rayDirX == 0)
+          ? double.infinity
+          : (1.0 / rayDirX).abs();
+      double deltaDistY = (rayDirY == 0)
+          ? double.infinity
+          : (1.0 / rayDirY).abs();
+      double perpWallDist;
+
+      // Direction to step in x or y direction (+1 or -1)
+      int stepX;
+      int stepY;
+
+      bool hit = false;
+      int side =
+          0; // 0 for North/South (vertical) walls, 1 for East/West (horizontal) walls
+
+      // Calculate step and initial sideDist
+      if (rayDirX < 0) {
+        stepX = -1;
+        sideDistX = (player.x - mapX) * deltaDistX;
+      } else {
+        stepX = 1;
+        sideDistX = (mapX + 1.0 - player.x) * deltaDistX;
+      }
+      if (rayDirY < 0) {
+        stepY = -1;
+        sideDistY = (player.y - mapY) * deltaDistY;
+      } else {
+        stepY = 1;
+        sideDistY = (mapY + 1.0 - player.y) * deltaDistY;
+      }
+
+      // 3. The True DDA Loop
+      while (!hit) {
+        // Jump to next map square, either in x-direction, or in y-direction
+        if (sideDistX < sideDistY) {
+          sideDistX += deltaDistX;
+          mapX += stepX;
+          side = 0;
+        } else {
+          sideDistY += deltaDistY;
+          mapY += stepY;
+          side = 1;
+        }
+
+        // Check bounds and wall collisions
+        if (mapY < 0 ||
+            mapY >= map.length ||
+            mapX < 0 ||
+            mapX >= map[0].length) {
+          hit = true;
+          perpWallDist = 20.0; // Out of bounds fallback
+        } else if (map[mapY][mapX] > 0) {
+          hit = true;
+        }
+      }
+
+      // Calculate distance projected on camera direction (No fisheye effect!)
+      if (side == 0) {
+        perpWallDist = (sideDistX - deltaDistX);
+      } else {
+        perpWallDist = (sideDistY - deltaDistY);
+      }
+
+      // 4. Calculate exact wall hit coordinate for textures
+      double wallX;
+      if (side == 0) {
+        wallX = player.y + perpWallDist * rayDirY;
+      } else {
+        wallX = player.x + perpWallDist * rayDirX;
+      }
+      wallX -= wallX.floor(); // Get just the fractional part (0.0 to 0.99)
+
+      _drawTexturedColumn(canvas, x, perpWallDist, wallX, side, size);
+    }
+  }
+
+  void _drawTexturedColumn(
+    Canvas canvas,
+    int x,
+    double distance,
+    double wallX,
+    int side,
+    Size size,
+  ) {
+    if (distance <= 0.01) distance = 0.01;
+
+    double wallHeight = size.height / distance;
+    double drawStart = (size.height / 2) - (wallHeight / 2);
+    double drawEnd = (size.height / 2) + (wallHeight / 2);
+
+    // --- PROCEDURAL TEXTURE LOGIC ---
+    Color baseColor;
+
+    // Draw a dark edge on the sides of the block to create "tiles"
+    if (wallX < 0.05 || wallX > 0.95) {
+      baseColor = Colors.black87;
+    } else {
+      baseColor = Colors.teal; // Main wall color
+    }
+
+    // Faux-Lighting: Darken East/West walls to give a 3D pop to corners
+    if (side == 1) {
+      baseColor = Color.fromARGB(
+        255,
+        ((baseColor.r * 255).round().clamp(0, 255) * 0.7).toInt(),
+        ((baseColor.g * 255).round().clamp(0, 255) * 0.7).toInt(),
+        ((baseColor.b * 255).round().clamp(0, 255) * 0.7).toInt(),
+      );
+    }
+
+    // Depth cueing: Dim colors as they get further away
+    double dimFactor = (1.0 - (distance / 15)).clamp(0.0, 1.0);
+    Color finalColor = Color.fromARGB(
+      255,
+      ((baseColor.r * 255).round().clamp(0, 255) * dimFactor).toInt(),
+      ((baseColor.g * 255).round().clamp(0, 255) * dimFactor).toInt(),
+      ((baseColor.b * 255).round().clamp(0, 255) * dimFactor).toInt(),
+    );
+
+    final paint = Paint()
+      ..color = finalColor
+      ..strokeWidth =
+          1.1 // Prevent transparent gaps between line strokes
+      ..style = PaintingStyle.stroke;
+
+    canvas.drawLine(
+      Offset(x.toDouble(), drawStart),
+      Offset(x.toDouble(), drawEnd),
+      paint,
+    );
+  }
+
+  @override
+  bool shouldRepaint(covariant RaycasterPainter oldDelegate) {
+    return oldDelegate.player != player ||
+        oldDelegate.playerAngle != playerAngle;
+  }
+}

linux/.gitignore

@@ -0,0 +1 @@
+flutter/ephemeral

linux/CMakeLists.txt

@@ -0,0 +1,128 @@
+# Project-level configuration.
+cmake_minimum_required(VERSION 3.13)
+project(runner LANGUAGES CXX)
+
+# The name of the executable created for the application. Change this to change
+# the on-disk name of your application.
+set(BINARY_NAME "wolf_dart")
+# The unique GTK application identifier for this application. See:
+# https://wiki.gnome.org/HowDoI/ChooseApplicationID
+set(APPLICATION_ID "com.example.wolf_dart")
+
+# Explicitly opt in to modern CMake behaviors to avoid warnings with recent
+# versions of CMake.
+cmake_policy(SET CMP0063 NEW)
+
+# Load bundled libraries from the lib/ directory relative to the binary.
+set(CMAKE_INSTALL_RPATH "$ORIGIN/lib")
+
+# Root filesystem for cross-building.
+if(FLUTTER_TARGET_PLATFORM_SYSROOT)
+  set(CMAKE_SYSROOT ${FLUTTER_TARGET_PLATFORM_SYSROOT})
+  set(CMAKE_FIND_ROOT_PATH ${CMAKE_SYSROOT})
+  set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
+  set(CMAKE_FIND_ROOT_PATH_MODE_PACKAGE ONLY)
+  set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
+  set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
+endif()
+
+# Define build configuration options.
+if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
+  set(CMAKE_BUILD_TYPE "Debug" CACHE
+    STRING "Flutter build mode" FORCE)
+  set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS
+    "Debug" "Profile" "Release")
+endif()
+
+# Compilation settings that should be applied to most targets.
+#
+# Be cautious about adding new options here, as plugins use this function by
+# default. In most cases, you should add new options to specific targets instead
+# of modifying this function.
+function(APPLY_STANDARD_SETTINGS TARGET)
+  target_compile_features(${TARGET} PUBLIC cxx_std_14)
+  target_compile_options(${TARGET} PRIVATE -Wall -Werror)
+  target_compile_options(${TARGET} PRIVATE "$<$<NOT:$<CONFIG:Debug>>:-O3>")
+  target_compile_definitions(${TARGET} PRIVATE "$<$<NOT:$<CONFIG:Debug>>:NDEBUG>")
+endfunction()
+
+# Flutter library and tool build rules.
+set(FLUTTER_MANAGED_DIR "${CMAKE_CURRENT_SOURCE_DIR}/flutter")
+add_subdirectory(${FLUTTER_MANAGED_DIR})
+
+# System-level dependencies.
+find_package(PkgConfig REQUIRED)
+pkg_check_modules(GTK REQUIRED IMPORTED_TARGET gtk+-3.0)
+
+# Application build; see runner/CMakeLists.txt.
+add_subdirectory("runner")
+
+# Run the Flutter tool portions of the build. This must not be removed.
+add_dependencies(${BINARY_NAME} flutter_assemble)
+
+# Only the install-generated bundle's copy of the executable will launch
+# correctly, since the resources must in the right relative locations. To avoid
+# people trying to run the unbundled copy, put it in a subdirectory instead of
+# the default top-level location.
+set_target_properties(${BINARY_NAME}
+  PROPERTIES
+  RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/intermediates_do_not_run"
+)
+
+
+# Generated plugin build rules, which manage building the plugins and adding
+# them to the application.
+include(flutter/generated_plugins.cmake)
+
+
+# === Installation ===
+# By default, "installing" just makes a relocatable bundle in the build
+# directory.
+set(BUILD_BUNDLE_DIR "${PROJECT_BINARY_DIR}/bundle")
+if(CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT)
+  set(CMAKE_INSTALL_PREFIX "${BUILD_BUNDLE_DIR}" CACHE PATH "..." FORCE)
+endif()
+
+# Start with a clean build bundle directory every time.
+install(CODE "
+  file(REMOVE_RECURSE \"${BUILD_BUNDLE_DIR}/\")
+  " COMPONENT Runtime)
+
+set(INSTALL_BUNDLE_DATA_DIR "${CMAKE_INSTALL_PREFIX}/data")
+set(INSTALL_BUNDLE_LIB_DIR "${CMAKE_INSTALL_PREFIX}/lib")
+
+install(TARGETS ${BINARY_NAME} RUNTIME DESTINATION "${CMAKE_INSTALL_PREFIX}"
+  COMPONENT Runtime)
+
+install(FILES "${FLUTTER_ICU_DATA_FILE}" DESTINATION "${INSTALL_BUNDLE_DATA_DIR}"
+  COMPONENT Runtime)
+
+install(FILES "${FLUTTER_LIBRARY}" DESTINATION "${INSTALL_BUNDLE_LIB_DIR}"
+  COMPONENT Runtime)
+
+foreach(bundled_library ${PLUGIN_BUNDLED_LIBRARIES})
+  install(FILES "${bundled_library}"
+    DESTINATION "${INSTALL_BUNDLE_LIB_DIR}"
+    COMPONENT Runtime)
+endforeach(bundled_library)
+
+# Copy the native assets provided by the build.dart from all packages.
+set(NATIVE_ASSETS_DIR "${PROJECT_BUILD_DIR}native_assets/linux/")
+install(DIRECTORY "${NATIVE_ASSETS_DIR}"
+   DESTINATION "${INSTALL_BUNDLE_LIB_DIR}"
+   COMPONENT Runtime)
+
+# Fully re-copy the assets directory on each build to avoid having stale files
+# from a previous install.
+set(FLUTTER_ASSET_DIR_NAME "flutter_assets")
+install(CODE "
+  file(REMOVE_RECURSE \"${INSTALL_BUNDLE_DATA_DIR}/${FLUTTER_ASSET_DIR_NAME}\")
+  " COMPONENT Runtime)
+install(DIRECTORY "${PROJECT_BUILD_DIR}/${FLUTTER_ASSET_DIR_NAME}"
+  DESTINATION "${INSTALL_BUNDLE_DATA_DIR}" COMPONENT Runtime)
+
+# Install the AOT library on non-Debug builds only.
+if(NOT CMAKE_BUILD_TYPE MATCHES "Debug")
+  install(FILES "${AOT_LIBRARY}" DESTINATION "${INSTALL_BUNDLE_LIB_DIR}"
+    COMPONENT Runtime)
+endif()

linux/flutter/CMakeLists.txt

@@ -0,0 +1,88 @@
+# This file controls Flutter-level build steps. It should not be edited.
+cmake_minimum_required(VERSION 3.10)
+
+set(EPHEMERAL_DIR "${CMAKE_CURRENT_SOURCE_DIR}/ephemeral")
+
+# Configuration provided via flutter tool.
+include(${EPHEMERAL_DIR}/generated_config.cmake)
+
+# TODO: Move the rest of this into files in ephemeral. See
+# https://github.com/flutter/flutter/issues/57146.
+
+# Serves the same purpose as list(TRANSFORM ... PREPEND ...),
+# which isn't available in 3.10.
+function(list_prepend LIST_NAME PREFIX)
+    set(NEW_LIST "")
+    foreach(element ${${LIST_NAME}})
+        list(APPEND NEW_LIST "${PREFIX}${element}")
+    endforeach(element)
+    set(${LIST_NAME} "${NEW_LIST}" PARENT_SCOPE)
+endfunction()
+
+# === Flutter Library ===
+# System-level dependencies.
+find_package(PkgConfig REQUIRED)
+pkg_check_modules(GTK REQUIRED IMPORTED_TARGET gtk+-3.0)
+pkg_check_modules(GLIB REQUIRED IMPORTED_TARGET glib-2.0)
+pkg_check_modules(GIO REQUIRED IMPORTED_TARGET gio-2.0)
+
+set(FLUTTER_LIBRARY "${EPHEMERAL_DIR}/libflutter_linux_gtk.so")
+
+# Published to parent scope for install step.
+set(FLUTTER_LIBRARY ${FLUTTER_LIBRARY} PARENT_SCOPE)
+set(FLUTTER_ICU_DATA_FILE "${EPHEMERAL_DIR}/icudtl.dat" PARENT_SCOPE)
+set(PROJECT_BUILD_DIR "${PROJECT_DIR}/build/" PARENT_SCOPE)
+set(AOT_LIBRARY "${PROJECT_DIR}/build/lib/libapp.so" PARENT_SCOPE)
+
+list(APPEND FLUTTER_LIBRARY_HEADERS
+  "fl_basic_message_channel.h"
+  "fl_binary_codec.h"
+  "fl_binary_messenger.h"
+  "fl_dart_project.h"
+  "fl_engine.h"
+  "fl_json_message_codec.h"
+  "fl_json_method_codec.h"
+  "fl_message_codec.h"
+  "fl_method_call.h"
+  "fl_method_channel.h"
+  "fl_method_codec.h"
+  "fl_method_response.h"
+  "fl_plugin_registrar.h"
+  "fl_plugin_registry.h"
+  "fl_standard_message_codec.h"
+  "fl_standard_method_codec.h"
+  "fl_string_codec.h"
+  "fl_value.h"
+  "fl_view.h"
+  "flutter_linux.h"
+)
+list_prepend(FLUTTER_LIBRARY_HEADERS "${EPHEMERAL_DIR}/flutter_linux/")
+add_library(flutter INTERFACE)
+target_include_directories(flutter INTERFACE
+  "${EPHEMERAL_DIR}"
+)
+target_link_libraries(flutter INTERFACE "${FLUTTER_LIBRARY}")
+target_link_libraries(flutter INTERFACE
+  PkgConfig::GTK
+  PkgConfig::GLIB
+  PkgConfig::GIO
+)
+add_dependencies(flutter flutter_assemble)
+
+# === Flutter tool backend ===
+# _phony_ is a non-existent file to force this command to run every time,
+# since currently there's no way to get a full input/output list from the
+# flutter tool.
+add_custom_command(
+  OUTPUT ${FLUTTER_LIBRARY} ${FLUTTER_LIBRARY_HEADERS}
+    ${CMAKE_CURRENT_BINARY_DIR}/_phony_
+  COMMAND ${CMAKE_COMMAND} -E env
+    ${FLUTTER_TOOL_ENVIRONMENT}
+    "${FLUTTER_ROOT}/packages/flutter_tools/bin/tool_backend.sh"
+      ${FLUTTER_TARGET_PLATFORM} ${CMAKE_BUILD_TYPE}
+  VERBATIM
+)
+add_custom_target(flutter_assemble DEPENDS
+  "${FLUTTER_LIBRARY}"
+  ${FLUTTER_LIBRARY_HEADERS}
+)

linux/flutter/generated_plugin_registrant.cc

@@ -0,0 +1,11 @@
+//
+//  Generated file. Do not edit.
+//
+
+// clang-format off
+
+#include "generated_plugin_registrant.h"
+
+
+void fl_register_plugins(FlPluginRegistry* registry) {
+}

linux/flutter/generated_plugin_registrant.h

@@ -0,0 +1,15 @@
+//
+//  Generated file. Do not edit.
+//
+
+// clang-format off
+
+#ifndef GENERATED_PLUGIN_REGISTRANT_
+#define GENERATED_PLUGIN_REGISTRANT_
+
+#include <flutter_linux/flutter_linux.h>
+
+// Registers Flutter plugins.
+void fl_register_plugins(FlPluginRegistry* registry);
+
+#endif  // GENERATED_PLUGIN_REGISTRANT_

linux/flutter/generated_plugins.cmake

@@ -0,0 +1,23 @@
+#
+# Generated file, do not edit.
+#
+
+list(APPEND FLUTTER_PLUGIN_LIST
+)
+
+list(APPEND FLUTTER_FFI_PLUGIN_LIST
+)
+
+set(PLUGIN_BUNDLED_LIBRARIES)
+
+foreach(plugin ${FLUTTER_PLUGIN_LIST})
+  add_subdirectory(flutter/ephemeral/.plugin_symlinks/${plugin}/linux plugins/${plugin})
+  target_link_libraries(${BINARY_NAME} PRIVATE ${plugin}_plugin)
+  list(APPEND PLUGIN_BUNDLED_LIBRARIES $<TARGET_FILE:${plugin}_plugin>)
+  list(APPEND PLUGIN_BUNDLED_LIBRARIES ${${plugin}_bundled_libraries})
+endforeach(plugin)
+
+foreach(ffi_plugin ${FLUTTER_FFI_PLUGIN_LIST})
+  add_subdirectory(flutter/ephemeral/.plugin_symlinks/${ffi_plugin}/linux plugins/${ffi_plugin})
+  list(APPEND PLUGIN_BUNDLED_LIBRARIES ${${ffi_plugin}_bundled_libraries})
+endforeach(ffi_plugin)

linux/runner/CMakeLists.txt

@@ -0,0 +1,26 @@
+cmake_minimum_required(VERSION 3.13)
+project(runner LANGUAGES CXX)
+
+# Define the application target. To change its name, change BINARY_NAME in the
+# top-level CMakeLists.txt, not the value here, or `flutter run` will no longer
+# work.
+#
+# Any new source files that you add to the application should be added here.
+add_executable(${BINARY_NAME}
+  "main.cc"
+  "my_application.cc"
+  "${FLUTTER_MANAGED_DIR}/generated_plugin_registrant.cc"
+)
+
+# Apply the standard set of build settings. This can be removed for applications
+# that need different build settings.
+apply_standard_settings(${BINARY_NAME})
+
+# Add preprocessor definitions for the application ID.
+add_definitions(-DAPPLICATION_ID="${APPLICATION_ID}")
+
+# Add dependency libraries. Add any application-specific dependencies here.
+target_link_libraries(${BINARY_NAME} PRIVATE flutter)
+target_link_libraries(${BINARY_NAME} PRIVATE PkgConfig::GTK)
+
+target_include_directories(${BINARY_NAME} PRIVATE "${CMAKE_SOURCE_DIR}")

linux/runner/main.cc

@@ -0,0 +1,6 @@
+#include "my_application.h"
+
+int main(int argc, char** argv) {
+  g_autoptr(MyApplication) app = my_application_new();
+  return g_application_run(G_APPLICATION(app), argc, argv);
+}

linux/runner/my_application.cc

@@ -0,0 +1,148 @@
+#include "my_application.h"
+
+#include <flutter_linux/flutter_linux.h>
+#ifdef GDK_WINDOWING_X11
+#include <gdk/gdkx.h>
+#endif
+
+#include "flutter/generated_plugin_registrant.h"
+
+struct _MyApplication {
+  GtkApplication parent_instance;
+  char** dart_entrypoint_arguments;
+};
+
+G_DEFINE_TYPE(MyApplication, my_application, GTK_TYPE_APPLICATION)
+
+// Called when first Flutter frame received.
+static void first_frame_cb(MyApplication* self, FlView* view) {
+  gtk_widget_show(gtk_widget_get_toplevel(GTK_WIDGET(view)));
+}
+
+// Implements GApplication::activate.
+static void my_application_activate(GApplication* application) {
+  MyApplication* self = MY_APPLICATION(application);
+  GtkWindow* window =
+      GTK_WINDOW(gtk_application_window_new(GTK_APPLICATION(application)));
+
+  // Use a header bar when running in GNOME as this is the common style used
+  // by applications and is the setup most users will be using (e.g. Ubuntu
+  // desktop).
+  // If running on X and not using GNOME then just use a traditional title bar
+  // in case the window manager does more exotic layout, e.g. tiling.
+  // If running on Wayland assume the header bar will work (may need changing
+  // if future cases occur).
+  gboolean use_header_bar = TRUE;
+#ifdef GDK_WINDOWING_X11
+  GdkScreen* screen = gtk_window_get_screen(window);
+  if (GDK_IS_X11_SCREEN(screen)) {
+    const gchar* wm_name = gdk_x11_screen_get_window_manager_name(screen);
+    if (g_strcmp0(wm_name, "GNOME Shell") != 0) {
+      use_header_bar = FALSE;
+    }
+  }
+#endif
+  if (use_header_bar) {
+    GtkHeaderBar* header_bar = GTK_HEADER_BAR(gtk_header_bar_new());
+    gtk_widget_show(GTK_WIDGET(header_bar));
+    gtk_header_bar_set_title(header_bar, "wolf_dart");
+    gtk_header_bar_set_show_close_button(header_bar, TRUE);
+    gtk_window_set_titlebar(window, GTK_WIDGET(header_bar));
+  } else {
+    gtk_window_set_title(window, "wolf_dart");
+  }
+
+  gtk_window_set_default_size(window, 1280, 720);
+
+  g_autoptr(FlDartProject) project = fl_dart_project_new();
+  fl_dart_project_set_dart_entrypoint_arguments(
+      project, self->dart_entrypoint_arguments);
+
+  FlView* view = fl_view_new(project);
+  GdkRGBA background_color;
+  // Background defaults to black, override it here if necessary, e.g. #00000000
+  // for transparent.
+  gdk_rgba_parse(&background_color, "#000000");
+  fl_view_set_background_color(view, &background_color);
+  gtk_widget_show(GTK_WIDGET(view));
+  gtk_container_add(GTK_CONTAINER(window), GTK_WIDGET(view));
+
+  // Show the window when Flutter renders.
+  // Requires the view to be realized so we can start rendering.
+  g_signal_connect_swapped(view, "first-frame", G_CALLBACK(first_frame_cb),
+                           self);
+  gtk_widget_realize(GTK_WIDGET(view));
+
+  fl_register_plugins(FL_PLUGIN_REGISTRY(view));
+
+  gtk_widget_grab_focus(GTK_WIDGET(view));
+}
+
+// Implements GApplication::local_command_line.
+static gboolean my_application_local_command_line(GApplication* application,
+                                                  gchar*** arguments,
+                                                  int* exit_status) {
+  MyApplication* self = MY_APPLICATION(application);
+  // Strip out the first argument as it is the binary name.
+  self->dart_entrypoint_arguments = g_strdupv(*arguments + 1);
+
+  g_autoptr(GError) error = nullptr;
+  if (!g_application_register(application, nullptr, &error)) {
+    g_warning("Failed to register: %s", error->message);
+    *exit_status = 1;
+    return TRUE;
+  }
+
+  g_application_activate(application);
+  *exit_status = 0;
+
+  return TRUE;
+}
+
+// Implements GApplication::startup.
+static void my_application_startup(GApplication* application) {
+  // MyApplication* self = MY_APPLICATION(object);
+
+  // Perform any actions required at application startup.
+
+  G_APPLICATION_CLASS(my_application_parent_class)->startup(application);
+}
+
+// Implements GApplication::shutdown.
+static void my_application_shutdown(GApplication* application) {
+  // MyApplication* self = MY_APPLICATION(object);
+
+  // Perform any actions required at application shutdown.
+
+  G_APPLICATION_CLASS(my_application_parent_class)->shutdown(application);
+}
+
+// Implements GObject::dispose.
+static void my_application_dispose(GObject* object) {
+  MyApplication* self = MY_APPLICATION(object);
+  g_clear_pointer(&self->dart_entrypoint_arguments, g_strfreev);
+  G_OBJECT_CLASS(my_application_parent_class)->dispose(object);
+}
+
+static void my_application_class_init(MyApplicationClass* klass) {
+  G_APPLICATION_CLASS(klass)->activate = my_application_activate;
+  G_APPLICATION_CLASS(klass)->local_command_line =
+      my_application_local_command_line;
+  G_APPLICATION_CLASS(klass)->startup = my_application_startup;
+  G_APPLICATION_CLASS(klass)->shutdown = my_application_shutdown;
+  G_OBJECT_CLASS(klass)->dispose = my_application_dispose;
+}
+
+static void my_application_init(MyApplication* self) {}
+
+MyApplication* my_application_new() {
+  // Set the program name to the application ID, which helps various systems
+  // like GTK and desktop environments map this running application to its
+  // corresponding .desktop file. This ensures better integration by allowing
+  // the application to be recognized beyond its binary name.
+  g_set_prgname(APPLICATION_ID);
+
+  return MY_APPLICATION(g_object_new(my_application_get_type(),
+                                     "application-id", APPLICATION_ID, "flags",
+                                     G_APPLICATION_NON_UNIQUE, nullptr));
+}

linux/runner/my_application.h

@@ -0,0 +1,21 @@
+#ifndef FLUTTER_MY_APPLICATION_H_
+#define FLUTTER_MY_APPLICATION_H_
+
+#include <gtk/gtk.h>
+
+G_DECLARE_FINAL_TYPE(MyApplication,
+                     my_application,
+                     MY,
+                     APPLICATION,
+                     GtkApplication)
+
+/**
+ * my_application_new:
+ *
+ * Creates a new Flutter-based application.
+ *
+ * Returns: a new #MyApplication.
+ */
+MyApplication* my_application_new();
+
+#endif  // FLUTTER_MY_APPLICATION_H_

pubspec.yaml

@@ -0,0 +1,19 @@
+name: wolf_dart
+description: "A new Flutter project."
+publish_to: 'none'
+version: 0.1.0+1
+
+environment:
+  sdk: ^3.11.1
+
+dependencies:
+  flutter:
+    sdk: flutter
+
+dev_dependencies:
+  flutter_test:
+    sdk: flutter
+  flutter_lints: ^6.0.0
+
+flutter:
+  uses-material-design: true