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Adds swarms of enemies to demo game

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This commit is contained in:
Viktor Lidholt 2015-08-25 14:49:54 -07:00
parent 0d0ee255fa
commit ec4aaf2efd
2 changed files with 64 additions and 20 deletions
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1
examples/game/lib/game_demo.dart
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@ -1,6 +1,7 @@
library game;
import 'dart:async';
import 'dart:math' as math;
import 'dart:sky' as sky;
import 'sprites.dart';

83
examples/game/lib/game_demo_node.dart
View File

@ -3,6 +3,9 @@ part of game;
final double _gameSizeWidth = 320.0;
double _gameSizeHeight = 320.0;
final double _chunkSpacing = 640.0;
final int _chunksPerLevel = 5;
final bool _drawDebug = false;
class GameDemoNode extends NodeWithSize {
@ -164,7 +167,6 @@ class GameDemoNode extends NodeWithSize {
}
int _chunk = 0;
double _chunkSpacing = 640.0;
void addObjects() {
@ -181,21 +183,24 @@ class GameDemoNode extends NodeWithSize {
if (chunk == 0) {
// Leave the first chunk empty
return;
} else if (chunk == 1) {
addLevelAsteroids(10, yPos, 0.0);
} else {
addLevelAsteroids(9 + chunk, yPos, 0.5);
}
}
void addLevelAsteroids(int numAsteroids, double yPos, double distribution) {
for (int i = 0; i < numAsteroids; i++) {
GameObjectType type = (randomDouble() < distribution) ? GameObjectType.asteroidBig : GameObjectType.asteroidSmall;
Point pos = new Point(randomSignedDouble() * 160.0,
yPos + _chunkSpacing * randomDouble());
_objectFactory.addGameObject(type, pos);
chunk -= 1;
int level = chunk ~/ _chunksPerLevel;
int part = chunk % _chunksPerLevel;
if (part == 0) {
_objectFactory.addAsteroids(10 + level * 4, yPos, 0.0 + (level * 0.2).clamp(0.0, 0.7));
} else if (part == 1) {
_objectFactory.addSwarm(4 + level * 2, yPos);
} else if (part == 2) {
_objectFactory.addAsteroids(10 + level * 4, yPos, 0.0 + (level * 0.2).clamp(0.0, 0.7));
} else if (part == 3) {
_objectFactory.addAsteroids(10 + level * 4, yPos, 0.0 + (level * 0.2).clamp(0.0, 0.7));
} else if (part == 4) {
_objectFactory.addAsteroids(10 + level * 4, yPos, 0.0 + (level * 0.2).clamp(0.0, 0.7));
}
_objectFactory.addGameObject(GameObjectType.movingEnemy, new Point(0.0, yPos + 160.0));
}
void fire() {
@ -434,20 +439,41 @@ class MovingEnemy extends Obstacle {
constraints = [new ConstraintRotationToMovement(0.0, 0.5)];
}
final double _swirlSpacing = 80.0;
_addRandomSquare(List<Offset> offsets, double x, double y) {
double xMove = (randomDouble() < 0.5) ? _swirlSpacing : -_swirlSpacing;
double yMove = (randomDouble() < 0.5) ? _swirlSpacing : -_swirlSpacing;
if (randomDouble() < 0.5) {
offsets.add(new Offset(x, y));
offsets.add(new Offset(xMove + x, y));
offsets.add(new Offset(xMove + x, yMove + y));
offsets.add(new Offset(x, yMove + y));
offsets.add(new Offset(x, y));
} else {
offsets.add(new Offset(x, y));
offsets.add(new Offset(x, y + yMove));
offsets.add(new Offset(xMove + x, yMove + y));
offsets.add(new Offset(xMove + x, y));
offsets.add(new Offset(x, y));
}
}
void setupActions() {
List<Offset> offsets = [
new Offset(-160.0, 160.0),
new Offset(-80.0, -160.0),
new Offset(0.0, 160.0),
new Offset(80.0, -160.0),
new Offset(160.0, 160.0)];
List<Offset> offsets = [];
_addRandomSquare(offsets, -_swirlSpacing, 0.0);
_addRandomSquare(offsets, _swirlSpacing, 0.0);
offsets.add(new Offset(-_swirlSpacing, 0.0));
List<Point> points = [];
for (Offset offset in offsets) {
points.add(position + offset);
}
ActionSpline spline = new ActionSpline((a) => position = a, points, 4.0);
ActionSpline spline = new ActionSpline((a) => position = a, points, 6.0);
spline.tension = 0.7;
actions.run(new ActionRepeatForever(spline));
}
@ -467,6 +493,23 @@ class GameObjectFactory {
Map<String,SoundEffect> sounds;
Level level;
void addAsteroids(int numAsteroids, double yPos, double distribution) {
for (int i = 0; i < numAsteroids; i++) {
GameObjectType type = (randomDouble() < distribution) ? GameObjectType.asteroidBig : GameObjectType.asteroidSmall;
Point pos = new Point(randomSignedDouble() * 160.0,
yPos + _chunkSpacing * randomDouble());
addGameObject(type, pos);
}
}
void addSwarm(int numEnemies, double yPos) {
for (int i = 0; i < numEnemies; i++) {
double spacing = math.max(_chunkSpacing / (numEnemies + 1.0), 80.0);
double y = yPos + _chunkSpacing / 2.0 - (numEnemies - 1) * spacing / 2.0 + i * spacing;
addGameObject(GameObjectType.movingEnemy, new Point(0.0, y));
}
}
void addGameObject(GameObjectType type, Point pos) {
GameObject obj;
if (type == GameObjectType.asteroidBig)