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Port the tumbler from Box2D (#4486)

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This commit is contained in:
metalgearsloth
2021-08-21 17:23:01 +10:00
committed by GitHub
parent 2965af93a1
commit bbbebbadf7
1 changed files with 84 additions and 0 deletions
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84
Content.Server/Physics/TestbedCommand.cs
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@@ -21,6 +21,7 @@
// SOFTWARE.
using System;
using Content.Server.Administration;
using Content.Shared.Administration;
using Content.Shared.Physics;
@@ -33,6 +34,7 @@ using Robust.Shared.Maths;
using Robust.Shared.Physics;
using Robust.Shared.Physics.Collision.Shapes;
using Robust.Shared.Physics.Dynamics;
using Robust.Shared.Physics.Dynamics.Joints;
using Robust.Shared.Timing;
@@ -97,6 +99,10 @@ namespace Content.Server.Physics
SetupPlayer(mapId, shell, player, mapManager);
CreatePyramid(mapId);
break;
case "tumbler":
SetupPlayer(mapId, shell, player, mapManager);
CreateTumbler(mapId);
break;
default:
shell.WriteLine($"testbed {args[0]} not found!");
return;
@@ -291,5 +297,83 @@ namespace Content.Server.Physics
x += deltaX;
}
}
private void CreateTumbler(MapId mapId)
{
var broadphaseSystem = EntitySystem.Get<SharedBroadphaseSystem>();
var compManager = IoCManager.Resolve<IComponentManager>();
var entityManager = IoCManager.Resolve<IEntityManager>();
var groundEnt = entityManager.SpawnEntity(null, new MapCoordinates(0f, 0f, mapId));
var ground = compManager.AddComponent<PhysicsComponent>(groundEnt);
var bodyEnt = entityManager.SpawnEntity(null, new MapCoordinates(0f, 10f, mapId));
var body = compManager.AddComponent<PhysicsComponent>(bodyEnt);
body.BodyType = BodyType.Dynamic;
body.SleepingAllowed = false;
body.FixedRotation = false;
// TODO: Box2D just derefs, bleh shape structs someday
var shape1 = new PolygonShape();
shape1.SetAsBox(0.5f, 10.0f, new Vector2(10.0f, 0.0f), 0.0f);
broadphaseSystem.CreateFixture(body, shape1, 20.0f);
var shape2 = new PolygonShape();
shape2.SetAsBox(0.5f, 10.0f, new Vector2(-10.0f, 0.0f), 0f);
broadphaseSystem.CreateFixture(body, shape2, 20.0f);
var shape3 = new PolygonShape();
shape3.SetAsBox(10.0f, 0.5f, new Vector2(0.0f, 10.0f), 0f);
broadphaseSystem.CreateFixture(body, shape3, 20.0f);
var shape4 = new PolygonShape();
shape4.SetAsBox(10.0f, 0.5f, new Vector2(0.0f, -10.0f), 0f);
broadphaseSystem.CreateFixture(body, shape4, 20.0f);
foreach (var fixture in body.Fixtures)
{
fixture.CollisionLayer = (int) CollisionGroup.Impassable;
}
// TODO: Should Joints be their own entities? Box2D just adds them directly to the world.
// HMMM
// At the least it should be its own damn component
var revolute = new RevoluteJoint(ground, body)
{
LocalAnchorA = new Vector2(0f, 10f),
LocalAnchorB = new Vector2(0f, 0f),
ReferenceAngle = 0f,
MotorSpeed = 0.05f * MathF.PI,
MaxMotorTorque = 100000000f,
EnableMotor = true
};
body.AddJoint(revolute);
// Box2D has this as 800 which is jesus christo.
// Wouldn't recommend higher than 100 in debug and higher than 300 on release unless
// you really want a profile.
var count = 50;
EntitySystem.Get<SharedPhysicsSystem>().Maps[mapId].Gravity = new Vector2(0f, -9.8f);
var mapManager = IoCManager.Resolve<IMapManager>();
for (var i = 0; i < count; i++)
{
Timer.Spawn(i * 20, () =>
{
if (!mapManager.MapExists(mapId)) return;
var ent = entityManager.SpawnEntity(null, new MapCoordinates(0f, 10f, mapId));
var body = compManager.AddComponent<PhysicsComponent>(ent);
body.BodyType = BodyType.Dynamic;
body.FixedRotation = false;
var shape = new PolygonShape();
shape.SetAsBox(0.125f, 0.125f);
broadphaseSystem.CreateFixture(body, shape, 0.0625f);
body.Fixtures[0].CollisionMask = (int) CollisionGroup.Impassable;
body.Fixtures[0].CollisionLayer = (int) CollisionGroup.Impassable;
});
}
}
}
}