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feat: Add RandomEffectController (#1203)

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* Create RandomEffectController

* added tests

* added example

* documentation

* formatting

* fix a test

* formatting

Co-authored-by: Erick <erickzanardoo@gmail.com>
This commit is contained in:
Pasha Stetsenko
2021-12-12 15:38:05 -08:00
committed by GitHub
parent 3b20129c8b
commit cdb2650b29
6 changed files with 293 additions and 11 deletions
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49
examples/lib/stories/effects/scale_effect_example.dart
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@ -1,3 +1,5 @@
import 'dart:math';
import 'package:flame/components.dart';
import 'package:flame/effects.dart';
import 'package:flame/game.dart';
@ -7,10 +9,10 @@ import 'package:flutter/material.dart';
class ScaleEffectExample extends FlameGame with TapDetector {
static const String description = '''
The `ScaleEffect` scales up the canvas before drawing the components and its
children.
In this example you can tap the screen and the component will scale up or
down, depending on its current state.
The star pulsates randomly using a RandomEffectController.
''';
late RectangleComponent square;
@ -30,6 +32,26 @@ class ScaleEffectExample extends FlameGame with TapDetector {
);
square.add(childSquare);
add(square);
add(
Star()
..position = Vector2(200, 100)
..add(
ScaleEffect.to(
Vector2.all(1.2),
InfiniteEffectController(
SequenceEffectController([
LinearEffectController(0.1),
ReverseLinearEffectController(0.1),
RandomEffectController.exponential(
PauseEffectController(1, progress: 0),
beta: 1,
),
]),
),
),
),
);
}
@override
@ -49,3 +71,26 @@ class ScaleEffectExample extends FlameGame with TapDetector {
);
}
}
class Star extends PositionComponent {
Star() {
const smallR = 15.0;
const bigR = 30.0;
const tau = 2 * pi;
shape = Path()..moveTo(bigR, 0);
for (var i = 1; i < 10; i++) {
final r = i.isEven ? bigR : smallR;
final a = i / 10 * tau;
shape.lineTo(r * cos(a), r * sin(a));
}
shape.close();
}
late final Path shape;
late final Paint paint = Paint()..color = const Color(0xFFFFF127);
@override
void render(Canvas canvas) {
canvas.drawPath(shape, paint);
}
}