73 lines
2.4 KiB
C#
73 lines
2.4 KiB
C#
using System.Numerics;
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using Content.Shared.Physics;
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using Robust.Client.GameObjects;
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using Robust.Client.Graphics;
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using Robust.Shared.Enums;
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namespace Content.Client.Physics;
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/// <summary>
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/// Draws a texture on top of a joint.
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/// </summary>
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public sealed class JointVisualsOverlay : Overlay
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{
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public override OverlaySpace Space => OverlaySpace.WorldSpaceBelowFOV;
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private IEntityManager _entManager;
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public JointVisualsOverlay(IEntityManager entManager)
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{
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_entManager = entManager;
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}
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protected override void Draw(in OverlayDrawArgs args)
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{
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var worldHandle = args.WorldHandle;
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var spriteSystem = _entManager.System<SpriteSystem>();
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var xformSystem = _entManager.System<SharedTransformSystem>();
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var joints = _entManager.EntityQueryEnumerator<JointVisualsComponent, TransformComponent>();
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var xformQuery = _entManager.GetEntityQuery<TransformComponent>();
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args.DrawingHandle.SetTransform(Matrix3x2.Identity);
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while (joints.MoveNext(out var visuals, out var xform))
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{
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if (xform.MapID != args.MapId)
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continue;
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var other = _entManager.GetEntity(visuals.Target);
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if (!xformQuery.TryGetComponent(other, out var otherXform))
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continue;
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if (xform.MapID != otherXform.MapID)
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continue;
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var texture = spriteSystem.Frame0(visuals.Sprite);
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var width = texture.Width / (float) EyeManager.PixelsPerMeter;
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var coordsA = xform.Coordinates;
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var coordsB = otherXform.Coordinates;
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var rotA = xform.LocalRotation;
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var rotB = otherXform.LocalRotation;
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coordsA = coordsA.Offset(rotA.RotateVec(visuals.OffsetA));
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coordsB = coordsB.Offset(rotB.RotateVec(visuals.OffsetB));
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var posA = xformSystem.ToMapCoordinates(coordsA).Position;
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var posB = xformSystem.ToMapCoordinates(coordsB).Position;
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var diff = (posB - posA);
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var length = diff.Length();
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var midPoint = diff / 2f + posA;
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var angle = (posB - posA).ToWorldAngle();
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var box = new Box2(-width / 2f, -length / 2f, width / 2f, length / 2f);
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var rotate = new Box2Rotated(box.Translated(midPoint), angle, midPoint);
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worldHandle.DrawTextureRect(texture, rotate);
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}
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}
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}
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