public async Task TestGridFixtures()
{
var server = StartServer();
await server.WaitIdleAsync();
var entManager = server.ResolveDependency <IEntityManager>();
var mapManager = server.ResolveDependency <IMapManager>();
var gridFixtures = server.ResolveDependency <IEntitySystemManager>().GetEntitySystem <GridFixtureSystem>();
await server.WaitAssertion(() =>
{
var mapId = mapManager.CreateMap();
var grid = mapManager.CreateGrid(mapId);
// Should be nothing if grid empty
Assert.That(entManager.ComponentManager.TryGetComponent(grid.GridEntityId, out PhysicsComponent gridBody));
Assert.That(gridBody.Fixtures.Count, Is.EqualTo(0));
Assert.That(gridBody.BodyType, Is.EqualTo(BodyType.Static));
// 1 fixture if we only ever update the 1 chunk
grid.SetTile(Vector2i.Zero, new Tile(1));
gridFixtures.Process();
Assert.That(gridBody.Fixtures.Count, Is.EqualTo(1));
// Also should only be a single tile.
var bounds = gridBody.Fixtures[0].Shape.CalculateLocalBounds(Angle.Zero);
// Poly probably has Box2D's radius added to it so won't be a unit square
Assert.That(MathHelper.CloseTo(Box2.Area(bounds), 1.0f, 0.1f));
// Now do 2 tiles (same chunk)
grid.SetTile(Vector2i.One, new Tile(1));
gridFixtures.Process();
Assert.That(gridBody.Fixtures.Count, Is.EqualTo(1));
bounds = gridBody.Fixtures[0].Shape.CalculateLocalBounds(Angle.Zero);
// Because it's a diagonal tile it will actually be 2x2 area (until we get accurate hitboxes anyway).
Assert.That(MathHelper.CloseTo(Box2.Area(bounds), 4.0f, 0.1f));
// If we add a new chunk should be 2 now
grid.SetTile(new Vector2i(-1, -1), new Tile(1));
gridFixtures.Process();
Assert.That(gridBody.Fixtures.Count, Is.EqualTo(2));
gridBody.LinearVelocity = Vector2.One;
Assert.That(gridBody.LinearVelocity.Length, Is.EqualTo(0f));
});
}
public async Task TestGridFixtures()
{
var server = StartServer();
await server.WaitIdleAsync();
var entManager = server.ResolveDependency <IEntityManager>();
var mapManager = server.ResolveDependency <IMapManager>();
await server.WaitAssertion(() =>
{
var mapId = mapManager.CreateMap();
var grid = mapManager.CreateGrid(mapId);
// Should be nothing if grid empty
Assert.That(entManager.TryGetComponent(grid.GridEntityId, out PhysicsComponent gridBody));
Assert.That(entManager.TryGetComponent(grid.GridEntityId, out FixturesComponent manager));
Assert.That(manager.FixtureCount, Is.EqualTo(0));
Assert.That(gridBody.BodyType, Is.EqualTo(BodyType.Static));
// 1 fixture if we only ever update the 1 chunk
grid.SetTile(Vector2i.Zero, new Tile(1));
Assert.That(manager.FixtureCount, Is.EqualTo(1));
// Also should only be a single tile.
var bounds = manager.Fixtures.First().Value.Shape.ComputeAABB(new Transform(Vector2.Zero, (float)Angle.Zero.Theta), 0);
// Poly probably has Box2D's radius added to it so won't be a unit square
Assert.That(MathHelper.CloseToPercent(Box2.Area(bounds), 1.0f, 0.1f));
// Now do 2 tiles (same chunk)
grid.SetTile(Vector2i.One, new Tile(1));
Assert.That(manager.FixtureCount, Is.EqualTo(2));
bounds = manager.Fixtures.First().Value.Shape.ComputeAABB(new Transform(Vector2.Zero, (float)Angle.Zero.Theta), 0);
// Even if we add a new tile old fixture should stay the same if they don't connect.
Assert.That(MathHelper.CloseToPercent(Box2.Area(bounds), 1.0f, 0.1f));
// If we add a new chunk should be 3 now
grid.SetTile(new Vector2i(-1, -1), new Tile(1));
Assert.That(manager.FixtureCount, Is.EqualTo(3));
gridBody.LinearVelocity = Vector2.One;
Assert.That(gridBody.LinearVelocity.Length, Is.EqualTo(0f));
});
}
