cup_edit/example/lib/menus/camera_submenu.dart

import 'dart:async';
import 'dart:math';

import 'package:flutter/material.dart';

import 'package:flutter_filament/filament_controller.dart';
import 'package:flutter_filament_example/main.dart';

class CameraSubmenu extends StatefulWidget {
  final FilamentController controller;
  const CameraSubmenu({super.key, required this.controller});

  @override
  State<StatefulWidget> createState() => _CameraSubmenuState();
}

class _CameraSubmenuState extends State<CameraSubmenu> {
  double _near = 0.05;
  double _far = 1000.0;

  final _menuController = MenuController();

  List<Widget> _cameraMenu() {
    return [
      MenuItemButton(
        closeOnActivate: false,
        onPressed: () async {
          ExampleWidgetState.showProjectionMatrices.value =
              !ExampleWidgetState.showProjectionMatrices.value;
          print("Set to ${ExampleWidgetState.showProjectionMatrices}");
        },
        child: Text(
          '${ExampleWidgetState.showProjectionMatrices.value ? "Hide" : "Display"} camera projection/culling projection matrices',
          style: TextStyle(
              fontWeight: ExampleWidgetState.showProjectionMatrices.value
                  ? FontWeight.bold
                  : FontWeight.normal),
        ),
      ),
      SubmenuButton(
          menuChildren: [1.0, 7.0, 14.0, 28.0, 56.0]
              .map((v) => MenuItemButton(
                    onPressed: () {
                      widget.controller.setCameraFocalLength(v);
                    },
                    child: Text(
                      v.toStringAsFixed(2),
                    ),
                  ))
              .toList(),
          child: const Text("Set camera focal length")),
      SubmenuButton(
          menuChildren: [0.05, 0.1, 1.0, 10.0, 100.0]
              .map((v) => MenuItemButton(
                    onPressed: () {
                      _near = v;
                      widget.controller.setCameraCulling(_near, _far);
                    },
                    child: Text(
                      v.toStringAsFixed(2),
                    ),
                  ))
              .toList(),
          child: const Text("Set near")),
      SubmenuButton(
          menuChildren: [5.0, 50.0, 500.0, 1000.0, 100000.0]
              .map((v) => MenuItemButton(
                    onPressed: () {
                      _far = v;
                      widget.controller.setCameraCulling(_near, _far);
                    },
                    child: Text(
                      v.toStringAsFixed(2),
                    ),
                  ))
              .toList(),
          child: const Text("Set far")),
      MenuItemButton(
        onPressed: () async {
          widget.controller.setCameraPosition(1.0, 1.0, -1.0);
        },
        child: const Text('Move to 1, 1, -1'),
      ),
      MenuItemButton(
        onPressed: ExampleWidgetState.last == null
            ? null
            : () async {
                await widget.controller
                    .setCamera(ExampleWidgetState.last!, null);
              },
        child: const Text('Set to first camera in last added asset'),
      ),
      MenuItemButton(
        onPressed: ExampleWidgetState.last == null
            ? null
            : () async {
                await widget.controller
                    .moveCameraToAsset(ExampleWidgetState.last!);
              },
        child: const Text("Move to last added asset"),
      ),
      MenuItemButton(
        onPressed: () {
          widget.controller.setCameraRotation(pi / 4, 0.0, 1.0, 0.0);
        },
        child: const Text("Rotate camera 45 degrees around y axis"),
      ),
      MenuItemButton(
        onPressed: () {
          ExampleWidgetState.frustumCulling =
              !ExampleWidgetState.frustumCulling;
          widget.controller
              .setViewFrustumCulling(ExampleWidgetState.frustumCulling);
        },
        child: Text(
            "${ExampleWidgetState.frustumCulling ? "Disable" : "Enable"} frustum culling"),
      ),
      MenuItemButton(
          closeOnActivate: false,
          onPressed: () async {
            var projMatrix =
                await widget.controller.getCameraProjectionMatrix();
            await showDialog(
                context: context,
                builder: (ctx) {
                  return Center(
                      child: Container(
                          height: 100,
                          width: 300,
                          color: Colors.white,
                          child: Text(projMatrix.storage
                              .map((v) => v.toStringAsFixed(2))
                              .join(","))));
                });
          },
          child: const Text("Get projection matrix")),
      MenuItemButton(
          closeOnActivate: false,
          onPressed: () async {
            var frustum = await widget.controller.getCameraFrustum();
            var normalString = [
              frustum.plane0,
              frustum.plane1,
              frustum.plane2,
              frustum.plane3,
              frustum.plane4,
              frustum.plane5
            ]
                .map((plane) =>
                    plane.normal.storage
                        .map((v) => v.toStringAsFixed(2))
                        .join(",") +
                    ",${plane.constant}")
                .join("\n");
            showDialog(
                context: context,
                builder: (ctx) {
                  return Center(
                      child: Container(
                          height: 300,
                          width: 300,
                          color: Colors.white,
                          child:
                              Text("Frustum plane normals : $normalString ")));
                });
            _menuController.close();
          },
          child: const Text("Get frustum")),
      SubmenuButton(
          menuChildren: ManipulatorMode.values.map((mm) {
            return MenuItemButton(
              onPressed: () {
                ExampleWidgetState.cameraManipulatorMode = mm;
                widget.controller.setCameraManipulatorOptions(
                    mode: ExampleWidgetState.cameraManipulatorMode,
                    orbitSpeedX: ExampleWidgetState.orbitSpeedX,
                    orbitSpeedY: ExampleWidgetState.orbitSpeedY,
                    zoomSpeed: ExampleWidgetState.zoomSpeed);
              },
              child: Text(
                mm.name,
                style: TextStyle(
                    fontWeight: ExampleWidgetState.cameraManipulatorMode == mm
                        ? FontWeight.bold
                        : FontWeight.normal),
              ),
            );
          }).toList(),
          child: const Text("Manipulator mode")),
      SubmenuButton(
          menuChildren: [0.01, 0.1, 1.0, 10.0, 100.0].map((speed) {
            return MenuItemButton(
              onPressed: () {
                ExampleWidgetState.zoomSpeed = speed;
                widget.controller.setCameraManipulatorOptions(
                    mode: ExampleWidgetState.cameraManipulatorMode,
                    orbitSpeedX: ExampleWidgetState.orbitSpeedX,
                    orbitSpeedY: ExampleWidgetState.orbitSpeedY,
                    zoomSpeed: ExampleWidgetState.zoomSpeed);
              },
              child: Text(
                speed.toString(),
                style: TextStyle(
                    fontWeight:
                        (speed - ExampleWidgetState.zoomSpeed).abs() < 0.0001
                            ? FontWeight.bold
                            : FontWeight.normal),
              ),
            );
          }).toList(),
          child: const Text("Zoom speed")),
      SubmenuButton(
          menuChildren: [0.001, 0.01, 0.1, 1.0].map((speed) {
            return MenuItemButton(
              onPressed: () {
                ExampleWidgetState.orbitSpeedX = speed;
                ExampleWidgetState.orbitSpeedY = speed;
                widget.controller.setCameraManipulatorOptions(
                    mode: ExampleWidgetState.cameraManipulatorMode,
                    orbitSpeedX: ExampleWidgetState.orbitSpeedX,
                    orbitSpeedY: ExampleWidgetState.orbitSpeedY,
                    zoomSpeed: ExampleWidgetState.zoomSpeed);
              },
              child: Text(
                speed.toString(),
                style: TextStyle(
                    fontWeight:
                        (speed - ExampleWidgetState.orbitSpeedX).abs() < 0.0001
                            ? FontWeight.bold
                            : FontWeight.normal),
              ),
            );
          }).toList(),
          child: const Text("Orbit speed (X & Y)"))
    ];
  }

  @override
  Widget build(BuildContext context) {
    return SubmenuButton(
      controller: _menuController,
      menuChildren: _cameraMenu(),
      child: const Text("Camera"),
    );
  }
}