41 lines
1.1 KiB
Dart
41 lines
1.1 KiB
Dart
import 'dart:html' as html;
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import 'dart:math' as math;
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import 'package:rules_of_living/src/Grid.dart';
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class Renderer {
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bool _dirty = true;
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bool _renderEdges = true;
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bool get renderEdges => _renderEdges;
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void set renderEdges(bool value) {
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_renderEdges = value;
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_dirty = true;
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}
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void render(html.CanvasElement canvas, Map<int, bool> map) {
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// only renders if any cells changed between renders
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if (!_dirty) return;
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html.CanvasRenderingContext2D ctx = canvas.getContext('2d');
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int brickW = (canvas.width ~/ map.width);
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int brickH = (canvas.height ~/ map.height);
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ctx.clearRect(0, 0, canvas.width, canvas.height);
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for (int i = 0; i < map.length; i++) {
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math.Point p = map.toCoordinates(i);
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if (_renderEdges) {
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ctx.setStrokeColorRgb(100, 100, 100);
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ctx.strokeRect(p.x * brickW, p.y * brickH, brickW, brickH);
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}
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if (map[i] == true)
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ctx.setFillColorRgb(155, 155, 255);
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else
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ctx.setFillColorRgb(0, 0, 0);
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ctx.fillRect(p.x * brickW, p.y * brickH, brickW, brickH);
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}
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_dirty = false;
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}
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}
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