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Overview
Comment:tileset
Downloads: Tarball | ZIP archive
Timelines: family | ancestors | descendants | both | trunk
Files: files | file ages | folders
SHA1: 31a1d7564ec65419fd62b1e515f9f613726bf6ed
User & Date: athaudia 2017-07-25 02:36:56.523
Context
2017-07-25
16:34
automatic scaling check-in: b9f5dfb290 user: athaudia tags: trunk
02:36
tileset check-in: 31a1d7564e user: athaudia tags: trunk
01:52
context and loader and timing check-in: edca182ac3 user: athaudia tags: trunk
Changes
Unified Diff Ignore Whitespace Patch
Changes to lib/src/context.dart. 
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import 'dart:html';










class Context {
	CanvasRenderingContext2D _ctx;
	Context(this._ctx);
	void draw(ImageElement img, int x, int y) {
		_ctx.drawImage(img, x, y);
	}

	void rect(int x, int y, int w, int h) {
		_ctx.fillRect(x, y, w, h);
	}


























}


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import 'dart:html';

class Tileset {
	ImageElement _img;
	int _tileW, _tileH, _spacing;
	Tileset(this._img, this._tileW, this._tileH, this._spacing);
	int tileCountX() {
		return ((_img.width+_spacing) / (_tileW+_spacing)).floor();
	}
}

class Context {
	CanvasRenderingContext2D _ctx;
	Context(this._ctx);
	void draw(ImageElement img, int x, int y) {
		_ctx.drawImage(img, x, y);
	}

	void rect(int x, int y, int w, int h) {
		_ctx.fillRect(x, y, w, h);
	}

	void drawTile(Tileset tileset, int tile, int x, int y) {
		int tcx = tileset.tileCountX();
		int tx = tile & tcx;
		int ty = (tile / tcx).floor();
		int posx = tx*(tileset._tileW+tileset._spacing);
		int posy = ty*(tileset._tileH+tileset._spacing);
		Rectangle src = new Rectangle(posx, posy, tileset._tileW, tileset._tileH);
		Rectangle dst = new Rectangle(x, y, tileset._tileW, tileset._tileH);
		_ctx.drawImageToRect(tileset._img, dst, sourceRect: src);
	}
}

class Loader {
	int loaded = 0;
	ImageElement image(String url) {
		var img = new ImageElement(src: url);
		loaded -= 1;
		img.onLoad.listen((e) => loaded += 1);
		return img;
	}

	Tileset tileset(String url, int tileWidth, int tileHeight,
	                {int spacing = 0}) {
		return new Tileset(image(url), tileWidth, tileHeight, spacing);
	}
}
Changes to lib/src/loader.dart. 
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import 'dart:html';

class Loader {
	int loaded = 0;
	ImageElement image(String url) {
		var img = new ImageElement(src: url);
		loaded -= 1;
		img.onLoad.listen((e) => loaded += 1);
		return img;
	}
}



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import 'dart:html';
Changes to web/index.html. 
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<!DOCTYPE html>
<html>
<head>
</head>
<body>
<script type="text/javascript" src="main.dart.js"></script>
</body>
</html>





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<!DOCTYPE html>
<html>
<head>
</head>
<body style="margin:0">
<script type="text/javascript" src="main.dart.js"></script>
</body>
</html>
Changes to web/main.dart. 
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import 'dart:html';
import 'package:playtypus/playtypus.dart';

class MyGame extends Game {
	ImageElement img;

	int tick = 0;
	MyGame() : super(800, 600) {}
	
	void onPreload(Loader load) {
		img = load.image("tileset.png");

	}
	void onLoad() {}
	void onRender(Context ctx) {
		ctx.rect(0,0,tick,600);
		ctx.draw(img, 0, 0);




	}
	void onTick() {
		tick += 1;
	}
		
}







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import 'dart:html';
import 'package:playtypus/playtypus.dart';

class MyGame extends Game {
	ImageElement img;
	Tileset tileset;
	int tick = 0;
	MyGame() : super(1920, 1080) {}
	
	void onPreload(Loader load) {
		img = load.image("tileset.png");
		tileset = load.tileset("tileset.png", 16, 16, spacing: 1);
	}
	void onLoad() {}
	void onRender(Context ctx) {
		ctx.rect(0,0,tick,600);
		//ctx.draw(img, 0, 0);
		int tile = (tick / 1).floor();
		for(int x = 0; x < 1920/16; ++x)
			for(int y = 0; y < 1080/16; ++y)
				ctx.drawTile(tileset, tile+x+y, x*16, y*16);
	}
	void onTick() {
		tick += 1;
	}
		
}
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