flutter/flame
1
0
Fork 0
mirror of https://github.com/flame-engine/flame.git synced 2025-11-03 20:36:31 +08:00
Code Issues Packages Projects Releases Wiki Activity

fix comments and update example

Browse Source
This commit is contained in:
rafaelbarbosatec
2020-06-23 11:34:10 -03:00
parent 433dbdc6ac
commit 76ff9930a6
5 changed files with 101 additions and 93 deletions
Download Patch File Download Diff File Expand all files Collapse all files

99
doc/examples/joystick/lib/main.dart
View File

@ -1,33 +1,19 @@
import 'dart:math';
import 'package:flame/components/joystick/Joystick_action.dart';
import 'package:flame/components/joystick/Joystick_directional.dart';
import 'package:flame/components/joystick/joystick_action.dart';
import 'package:flame/components/joystick/joystick_component.dart';
import 'package:flame/components/joystick/joystick_events.dart';
import 'package:flame/components/joystick/joystick_directional.dart';
import 'package:flame/game.dart';
import 'package:flame/gestures.dart';
import 'package:flame/palette.dart';
import 'package:flutter/material.dart';
import 'player.dart';
void main() {
final game = MyGame();
runApp(game.widget);
}
class MyGame extends BaseGame
with MultiTouchDragDetector
implements JoystickListener {
final _whitePaint = BasicPalette.white.paint;
final _bluePaint = Paint()..color = const Color(0xFF0000FF);
final _greenPaint = Paint()..color = const Color(0xFF00FF00);
final double speed = 159;
double currentSpeed = 0;
double _radAngle;
bool _move = false;
Paint _paint;
Rect _rect;
class MyGame extends BaseGame with MultiTouchDragDetector {
final player = Player();
final joystick = JoystickComponent(
directional: JoystickDirectional(),
actions: [
@ -56,83 +42,14 @@ class MyGame extends BaseGame
);
MyGame() {
_paint = _whitePaint;
joystick.addObserver(this);
joystick.addObserver(player);
add(player);
add(joystick);
}
@override
void update(double dt) {
if (_move) {
moveFromAngle(dt);
}
super.update(dt);
}
@override
void render(Canvas canvas) {
if (_rect != null) {
canvas.save();
canvas.translate(_rect.center.dx, _rect.center.dy);
canvas.rotate(_radAngle == 0.0 ? 0.0 : _radAngle + (pi / 2));
canvas.translate(-_rect.center.dx, -_rect.center.dy);
canvas.drawRect(_rect, _paint);
canvas.restore();
}
super.render(canvas);
}
@override
void onReceiveDrag(DragEvent drag) {
joystick.onReceiveDrag(drag);
super.onReceiveDrag(drag);
}
@override
void resize(Size size) {
_rect = Rect.fromLTWH(
(size.width / 2) - 25,
(size.height / 2) - 25,
50,
50,
);
super.resize(size);
}
@override
void joystickAction(JoystickActionEvent event) {
if (event.event == ActionEvent.DOWN) {
if (event.id == 1) {
_paint = _paint == _whitePaint ? _bluePaint : _whitePaint;
}
if (event.id == 2) {
_paint = _paint == _whitePaint ? _greenPaint : _whitePaint;
}
}
}
@override
void joystickChangeDirectional(JoystickDirectionalEvent event) {
_move = event.directional != JoystickMoveDirectional.IDLE;
if (_move) {
_radAngle = event.radAngle;
currentSpeed = speed * event.intensity;
}
}
void moveFromAngle(double dtUpdate) {
final double nextX = (currentSpeed * dtUpdate) * cos(_radAngle);
final double nextY = (currentSpeed * dtUpdate) * sin(_radAngle);
final Offset nextPoint = Offset(nextX, nextY);
final Offset diffBase = Offset(
_rect.center.dx + nextPoint.dx,
_rect.center.dy + nextPoint.dy,
) -
_rect.center;
final Rect newPosition = _rect.shift(diffBase);
_rect = newPosition;
}
}