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Collision detection between children (#943)

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* Enable children of different components to collide

* Re-add import
This commit is contained in:
Lukas Klingsbo
2021-09-15 15:11:00 +02:00
committed by GitHub
parent e3fa9f2a55
commit 55ab428a9e
8 changed files with 101 additions and 21 deletions
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55
examples/lib/stories/collision_detection/multiple_shapes.dart
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@ -213,6 +213,35 @@ class CollidableSnowman extends MyCollidable {
addHitbox(top);
addHitbox(middle);
addHitbox(bottom);
add(randomCollidable(
Vector2(size.x / 2, size.y * 0.75),
size / 4,
Vector2.zero(),
screenCollidable,
));
}
}
MyCollidable randomCollidable(
Vector2 position,
Vector2 size,
Vector2 velocity,
ScreenCollidable screenCollidable, {
Random? rng,
}) {
final _rng = rng ?? Random();
final rotationSpeed = 0.5 - _rng.nextDouble();
final shapeType = Shapes.values[_rng.nextInt(Shapes.values.length)];
switch (shapeType) {
case Shapes.circle:
return CollidableCircle(position, size, velocity, screenCollidable)
..rotationSpeed = rotationSpeed;
case Shapes.rectangle:
return CollidableRectangle(position, size, velocity, screenCollidable)
..rotationSpeed = rotationSpeed;
case Shapes.polygon:
return CollidablePolygon(position, size, velocity, screenCollidable)
..rotationSpeed = rotationSpeed;
}
}
@ -239,7 +268,7 @@ class MultipleShapes extends FlameGame
add(snowman);
var totalAdded = 1;
while (totalAdded < 20) {
lastToAdd = createRandomCollidable(lastToAdd, screenCollidable);
lastToAdd = nextRandomCollidable(lastToAdd, screenCollidable);
final lastBottomRight =
lastToAdd.toAbsoluteRect().bottomRight.toVector2();
if (lastBottomRight.x < size.x && lastBottomRight.y < size.y) {
@ -254,9 +283,9 @@ class MultipleShapes extends FlameGame
final _rng = Random();
final _distance = Vector2(100, 0);
MyCollidable createRandomCollidable(
MyCollidable nextRandomCollidable(
MyCollidable lastCollidable,
ScreenCollidable screen,
ScreenCollidable screenCollidable,
) {
final collidableSize = Vector2.all(50) + Vector2.random(_rng) * 100;
final isXOverflow = lastCollidable.position.x +
@ -270,19 +299,13 @@ class MultipleShapes extends FlameGame
..x += collidableSize.x / 2;
}
final velocity = (Vector2.random(_rng) - Vector2.random(_rng)) * 400;
final rotationSpeed = 0.5 - _rng.nextDouble();
final shapeType = Shapes.values[_rng.nextInt(Shapes.values.length)];
switch (shapeType) {
case Shapes.circle:
return CollidableCircle(position, collidableSize, velocity, screen)
..rotationSpeed = rotationSpeed;
case Shapes.rectangle:
return CollidableRectangle(position, collidableSize, velocity, screen)
..rotationSpeed = rotationSpeed;
case Shapes.polygon:
return CollidablePolygon(position, collidableSize, velocity, screen)
..rotationSpeed = rotationSpeed;
}
return randomCollidable(
position,
collidableSize,
velocity,
screenCollidable,
rng: _rng,
);
}
@override