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Updates startled in game demo to use drawAtlas

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This commit is contained in:
Viktor Lidholt 2015-07-28 12:49:36 -07:00
parent 0d7156fc03
commit 01ac0095e8
1 changed files with 20 additions and 26 deletions
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46
packages/flutter/example/game/lib/game_demo_world.dart
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@ -562,49 +562,43 @@ class Laser extends Sprite {
// Background starfield
class StarField extends Node {
Image _image;
int _numStars;
List<Point> _starPositions;
List<double> _starScales;
List<double> _opacity;
List<Texture> _textures;
List<Rect> _rects;
List<Color> _colors;
Paint _paint = new Paint()
..setFilterQuality(sky.FilterQuality.low)
..isAntiAlias = false
..setTransferMode(sky.TransferMode.plus);
StarField(SpriteSheet spriteSheet, this._numStars) {
_starPositions = [];
_starScales = [];
_opacity = [];
_textures = [];
_colors = [];
_rects = [];
for (int i = 0; i < _numStars; i++) {
_starPositions.add(new Point(_rand.nextDouble() * _gameSizeWidth, _rand.nextDouble() * _gameSizeHeight));
_starScales.add(_rand.nextDouble());
_opacity.add(_rand.nextDouble() * 0.5 + 0.5);
_textures.add(spriteSheet["star_${_rand.nextInt(2)}.png"]);
_colors.add(new Color.fromARGB((255.0 * (_rand.nextDouble() * 0.5 + 0.5)).toInt(), 255, 255, 255));
_rects.add(spriteSheet["star_${_rand.nextInt(2)}.png"].frame);
}
_image = spriteSheet.image;
}
void paint(PaintingCanvas canvas) {
// Setup paint object for opacity and transfer mode
Paint paint = new Paint();
paint.setTransferMode(sky.TransferMode.plus);
double baseScaleX = 64.0 / _textures[0].size.width;
double baseScaleY = 64.0 / _textures[0].size.height;
// Draw each star
// Create a transform for each star
List<sky.RSTransform> transforms = [];
for (int i = 0; i < _numStars; i++) {
Point pos = _starPositions[i];
double scale = _starScales[i];
paint.color = new Color.fromARGB((255.0*_opacity[i]).toInt(), 255, 255, 255);
canvas.save();
canvas.translate(pos.x, pos.y);
canvas.scale(baseScaleX * scale, baseScaleY * scale);
canvas.drawImageRect(_textures[i].image, _textures[i].frame, _textures[i].spriteSourceSize, paint);
canvas.restore();
sky.RSTransform transform = new sky.RSTransform(_starScales[i], 0.0, _starPositions[i].x, _starPositions[i].y);
transforms.add(transform);
}
// Draw the stars
canvas.drawAtlas(_image, transforms, _rects, _colors, sky.TransferMode.modulate, null, _paint);
}
void move(double dx, double dy) {