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Split up addRandomPattern function

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Unknown 2018-10-22 19:17:00 +02:00
parent 0b5b1de454
commit 474adb740c
1 changed files with 32 additions and 13 deletions
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45
lib/src/Simulation.dart
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@ -9,6 +9,10 @@ class Simulation {
Grid<bool> map; Grid<bool> map;
Grid<bool> _snapshot; Grid<bool> _snapshot;
final int _RANDOM_PATTERN_AMOUNT = 20;
final int _RANDOM_PATTERN_DISPERSAL = 10;
final double _RANDOM_PATTERN_SPREAD_FROM_CENTER = 1 / 3;
RuleSet rules = GameOfLife(); RuleSet rules = GameOfLife();
bool dirty = true; bool dirty = true;
@ -16,7 +20,6 @@ class Simulation {
bool _renderEdges = true; bool _renderEdges = true;
bool get renderEdges => _renderEdges; bool get renderEdges => _renderEdges;
int _amount;
int _dispersal; int _dispersal;
math.Point get gridSize => math.Point<int>(map.width, map.height); math.Point get gridSize => math.Point<int>(map.width, map.height);
@ -38,25 +41,41 @@ class Simulation {
return map; return map;
} }
void addRandomPattern({int amount, int dispersal}) { void addRandomPattern(
int _startingSeed = DateTime.now().millisecondsSinceEpoch; {int seed, int amount, int dispersal, num spreadFromCenter}) {
math.Random rng = new math.Random(_startingSeed); math.Random rng = _getRNG(seed ?? DateTime.now().millisecondsSinceEpoch);
_amount = amount ?? rng.nextInt(20); amount ??= rng.nextInt(_RANDOM_PATTERN_AMOUNT);
_dispersal = dispersal ?? 10; dispersal ??= _RANDOM_PATTERN_DISPERSAL;
int cx = rng.nextInt(map.width ~/ 3) + (map.width ~/ 3); spreadFromCenter ??= _RANDOM_PATTERN_SPREAD_FROM_CENTER;
int cy = rng.nextInt(map.height ~/ 3) + (map.height ~/ 3);
int sanityCheck = 0; int sanityCheck = 0;
for (var i = 0; i < (_amount); i++) { Map<int, bool> changeSet = {};
for (var i = 0; i < (amount); i++) {
sanityCheck++; sanityCheck++;
getCellState(cx, cy) math.Point cell = _getRandomPoint(rng, gridSize, spreadFromCenter);
getCellState(cell.x, cell.y)
? i-- ? i--
: setCellState( : changeSet[map.toIndex(cell.x, cell.y)] = true;
cx + rng.nextInt(_dispersal), cy + rng.nextInt(_dispersal), true);
if (sanityCheck > 100 && sanityCheck > i * 3) break; if (sanityCheck > 100 && sanityCheck > i * 3) break;
} }
mergeStateChanges(changeSet);
}
dirty = true; math.Random _getRNG(int seed) {
math.Random rng = new math.Random(seed);
return rng;
}
math.Point<int> _getRandomPoint(
math.Random rng, math.Point size, num spreadFromCenter) {
math.Point absoluteSpread =
math.Point(map.width * spreadFromCenter, map.height * spreadFromCenter);
math.Point center = math.Point(map.width / 2, map.height / 2);
num cx = rng.nextInt(absoluteSpread.x.toInt()) +
(center.x - absoluteSpread.x / 2);
num cy = rng.nextInt(absoluteSpread.y.toInt()) +
(center.y - absoluteSpread.y / 2);
return math.Point<int>(cx.toInt(), cy.toInt());
} }
void setCellState(int x, int y, bool state) { void setCellState(int x, int y, bool state) {