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Places demo game in a OneChildRenderObjectWrapper and adds a star field and nebula for background
R=abarth@chromium.org Review URL: https://codereview.chromium.org/1187153002.
This commit is contained in:
Viktor Lidholt
parent
5505a200ce
commit
abc8eaa505
@ -68,7 +68,6 @@ class GameDemoBox extends SpriteBox {
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}
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else if (pointer == _secondPointer) {
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_secondPointer = -1;
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_gameWorld.controlFire();
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}
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break;
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default:
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@ -14,6 +14,8 @@ const double _maxAsteroidSpeed = 1.0;
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const int _lifeTimeLaser = 50;
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const int _numStarsInStarField = 150;
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class GameDemoWorld extends NodeWithSize {
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// Images
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@ -21,15 +23,21 @@ class GameDemoWorld extends NodeWithSize {
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Image _imgAsteroid;
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Image _imgShip;
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Image _imgLaser;
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Image _imgStar;
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Image _imgNebula;
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// Inputs
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double _joystickX = 0.0;
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double _joystickY = 0.0;
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bool _fire;
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Node _gameLayer;
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Ship _ship;
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List<Asteroid> _asteroids = [];
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List<Laser> _lasers = [];
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StarField _starField;
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Nebula _nebula;
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GameDemoWorld(ImageMap images) : super.withSize(new Size(_gameSizeWidth, _gameSizeHeight)) {
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@ -38,6 +46,11 @@ class GameDemoWorld extends NodeWithSize {
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_imgAsteroid = images["https://raw.githubusercontent.com/slembcke/GalacticGuardian.spritebuilder/GDC/Packages/SpriteBuilder%20Resources.sbpack/Sprites/resources-auto/asteroid_big_002.png"];
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_imgShip = images["https://raw.githubusercontent.com/slembcke/GalacticGuardian.spritebuilder/GDC/Packages/SpriteBuilder%20Resources.sbpack/Sprites/resources-auto/GG_blueship_Lv3.png"];
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_imgLaser = images["https://raw.githubusercontent.com/slembcke/GalacticGuardian.spritebuilder/GDC/Packages/SpriteBuilder%20Resources.sbpack/Sprites/resources-auto/laserBlue.png"];
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_imgStar = images["https://raw.githubusercontent.com/slembcke/GalacticGuardian.spritebuilder/GDC/Packages/SpriteBuilder%20Resources.sbpack/Sprites/resources-auto/laserFlashPurple.png"];
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_imgNebula = images["https://raw.githubusercontent.com/slembcke/GalacticGuardian.spritebuilder/GDC/Source/Resources/NebulaClouds.png"];
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_gameLayer = new Node();
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this.addChild(_gameLayer);
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// Add some asteroids to the game world
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for (int i = 0; i < 5; i++) {
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@ -49,6 +62,14 @@ class GameDemoWorld extends NodeWithSize {
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// Add ship
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addShip();
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// Add starfield
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_starField = new StarField.withImage(_imgStar, _numStarsInStarField);
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_starField.zPosition = -2.0;
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addChild(_starField);
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// Add nebula
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addNebula();
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}
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// Methods for adding game objects
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@ -57,21 +78,21 @@ class GameDemoWorld extends NodeWithSize {
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Sprite sprtBg = new Sprite.withImage(_imgBg);
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sprtBg.size = new Size(_gameSizeWidth, _gameSizeHeight);
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sprtBg.pivot = Point.origin;
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this.addChild(sprtBg);
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_gameLayer.addChild(sprtBg);
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}
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void addAsteroid(AsteroidSize size, [Point pos]) {
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Asteroid asteroid = new Asteroid.withImage(_imgAsteroid, size);
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asteroid.zPosition = 1.0;
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if (pos != null) asteroid.position = pos;
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this.addChild(asteroid);
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_gameLayer.addChild(asteroid);
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_asteroids.add(asteroid);
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}
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void addShip() {
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Ship ship = new Ship.withImage(_imgShip);
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ship.zPosition = 10.0;
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this.addChild(ship);
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_gameLayer.addChild(ship);
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_ship = ship;
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}
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@ -79,7 +100,12 @@ class GameDemoWorld extends NodeWithSize {
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Laser laser = new Laser.withImage(_imgLaser, _ship);
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laser.zPosition = 8.0;
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_lasers.add(laser);
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this.addChild(laser);
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_gameLayer.addChild(laser);
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}
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void addNebula() {
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_nebula = new Nebula.withImage(_imgNebula);
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_gameLayer.addChild(_nebula);
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}
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void update(double dt) {
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@ -147,13 +173,16 @@ class GameDemoWorld extends NodeWithSize {
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Point delta = new Point(_gameSizeWidth/2 - _ship.position.x, _gameSizeHeight/2 - _ship.position.y);
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delta = pointMult(delta, cameraDampening);
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for (Node child in children) {
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for (Node child in _gameLayer.children) {
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child.position = pointAdd(child.position, delta);
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}
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// Update starfield
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_starField.move(delta.x, delta.y);
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}
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void warpObjects() {
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for (Node child in children) {
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for (Node child in _gameLayer.children) {
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if (child.position.x < 0) child.position = pointAdd(child.position, new Point(_gameSizeWidth, 0.0));
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if (child.position.x >= _gameSizeWidth) child.position = pointAdd(child.position, new Point(-_gameSizeWidth, 0.0));
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if (child.position.y < 0) child.position = pointAdd(child.position, new Point(0.0, _gameSizeHeight));
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@ -252,6 +281,85 @@ class Laser extends Sprite {
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}
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}
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// Background starfield
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class StarField extends Node {
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Image _img;
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int _numStars;
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List<Point> _starPositions;
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List<double> _starScales;
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List<double> _opacity;
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StarField.withImage(Image this._img, int this._numStars) {
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_starPositions = [];
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_starScales = [];
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_opacity = [];
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for (int i = 0; i < _numStars; i++) {
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_starPositions.add(new Point(_rand.nextDouble() * _gameSizeWidth, _rand.nextDouble() * _gameSizeHeight));
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_starScales.add(_rand.nextDouble());
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_opacity.add(_rand.nextDouble() * 0.5 + 0.5);
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}
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}
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void paint(PictureRecorder canvas) {
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// Setup paint object for opacity and transfer mode
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Paint paint = new Paint();
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paint.setTransferMode(TransferMode.plusMode);
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double baseScaleX = 32.0/_img.width;
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double baseScaleY = 32.0/_img.height;
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// Draw each star
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for (int i = 0; i < _numStars; i++) {
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Point pos = _starPositions[i];
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double scale = _starScales[i];
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paint.color = new Color.fromARGB((255.0*_opacity[i]).toInt(), 255, 255, 255);
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canvas.save();
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canvas.translate(pos.x, pos.y);
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canvas.scale(baseScaleX*scale, baseScaleY*scale);
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canvas.drawImage(_img, 0.0, 0.0, paint);
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canvas.restore();
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}
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}
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void move(double dx, double dy) {
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for (int i = 0; i < _numStars; i++) {
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double xPos = _starPositions[i].x;
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double yPos = _starPositions[i].y;
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double scale = _starScales[i];
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xPos += dx * scale;
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yPos += dy * scale;
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if (xPos >= _gameSizeWidth) xPos -= _gameSizeWidth;
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if (xPos < 0) xPos += _gameSizeWidth;
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if (yPos >= _gameSizeHeight) yPos -= _gameSizeHeight;
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if (yPos < 0) yPos += _gameSizeHeight;
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_starPositions[i] = new Point(xPos, yPos);
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}
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}
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}
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class Nebula extends Node {
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Nebula.withImage(Image img) {
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for (int i = 0; i < 2; i++) {
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for (int j = 0; j < 2; j++) {
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Sprite sprt = new Sprite.withImage(img);
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sprt.pivot = Point.origin;
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sprt.position = new Point(i * _gameSizeWidth - _gameSizeWidth, j * _gameSizeHeight - _gameSizeHeight);
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addChild(sprt);
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}
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}
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}
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}
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// Convenience methods
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Point pointAdd(Point a, Point b) {
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@ -1,7 +1,10 @@
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import 'dart:sky';
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import 'lib/game_demo.dart';
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import 'lib/sprites.dart';
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import 'package:sky/widgets/basic.dart';
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import 'package:sky/app/view.dart';
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import 'package:sky/widgets/ui_node.dart';
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import 'package:sky/widgets/raised_button.dart';
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AppView app;
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@ -12,10 +15,47 @@ void main() {
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"https://raw.githubusercontent.com/slembcke/GalacticGuardian.spritebuilder/GDC/Packages/SpriteBuilder%20Resources.sbpack/Sprites/resources-auto/asteroid_big_002.png",
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"https://raw.githubusercontent.com/slembcke/GalacticGuardian.spritebuilder/GDC/Packages/SpriteBuilder%20Resources.sbpack/Sprites/resources-auto/GG_blueship_Lv3.png",
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"https://raw.githubusercontent.com/slembcke/GalacticGuardian.spritebuilder/GDC/Packages/SpriteBuilder%20Resources.sbpack/Sprites/resources-auto/laserBlue.png",
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"https://raw.githubusercontent.com/slembcke/GalacticGuardian.spritebuilder/GDC/Packages/SpriteBuilder%20Resources.sbpack/Sprites/resources-auto/laserFlashPurple.png",
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"https://raw.githubusercontent.com/slembcke/GalacticGuardian.spritebuilder/GDC/Source/Resources/NebulaClouds.png",
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],
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allLoaded);
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}
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void allLoaded(ImageMap loader) {
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app = new AppView(root: (new GameDemoBox(new GameDemoWorld(loader))));
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_loader = loader;
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new GameDemoApp();
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}
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class GameDemoApp extends App {
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UINode build() {
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return new Stack([
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new GameDemo(),
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// new StackPositionedChild(
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// new Flex([
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// new FlexExpandingChild(
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// new RaisedButton(child:new Text("Hello")),
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// key: 1
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// ),
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// new FlexExpandingChild(
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// new RaisedButton(child:new Text("Foo!")),
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// key: 2
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// )
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// ]),
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// right:0.0,
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// top: 20.0
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// )
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]);
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}
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}
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ImageMap _loader;
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class GameDemo extends OneChildRenderObjectWrapper {
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GameDemo({ UINode child, Object key })
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: super(child: child, key: key);
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GameDemoBox get root { return super.root; }
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GameDemoBox createNode() => new GameDemoBox(new GameDemoWorld(_loader));
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}
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