70 lines
2.6 KiB
C#
70 lines
2.6 KiB
C#
using Content.Client.Parallax.Managers;
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using Robust.Client.Graphics;
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using Robust.Client.UserInterface;
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using Robust.Shared.Random;
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using Robust.Shared.Timing;
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using Robust.Shared.ViewVariables;
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namespace Content.Client.Parallax;
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/// <summary>
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/// Renders the parallax background as a UI control.
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/// </summary>
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public sealed class ParallaxControl : Control
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{
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[Dependency] private readonly IGameTiming _timing = default!;
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[Dependency] private readonly IParallaxManager _parallaxManager = default!;
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[Dependency] private readonly IRobustRandom _random = default!;
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[ViewVariables(VVAccess.ReadWrite)] public Vector2 Offset { get; set; }
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public ParallaxControl()
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{
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IoCManager.InjectDependencies(this);
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Offset = (_random.Next(0, 1000), _random.Next(0, 1000));
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RectClipContent = true;
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_parallaxManager.LoadParallaxByName("FastSpace");
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}
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protected override void Draw(DrawingHandleScreen handle)
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{
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foreach (var layer in _parallaxManager.GetParallaxLayers("FastSpace"))
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{
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var tex = layer.Texture;
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var texSize = (tex.Size.X * (int) Size.X, tex.Size.Y * (int) Size.X) * layer.Config.Scale.Floored() / 540;
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var ourSize = PixelSize;
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var currentTime = (float) _timing.RealTime.TotalSeconds;
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var offset = Offset + new Vector2(currentTime * 100f, currentTime * 0f);
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if (layer.Config.Tiled)
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{
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// Multiply offset by slowness to match normal parallax
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var scaledOffset = (offset * layer.Config.Slowness).Floored();
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// Then modulo the scaled offset by the size to prevent drawing a bunch of offscreen tiles for really small images.
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scaledOffset.X %= texSize.X;
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scaledOffset.Y %= texSize.Y;
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// Note: scaledOffset must never be below 0 or there will be visual issues.
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// It could be allowed to be >= texSize on a given axis but that would be wasteful.
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for (var x = -scaledOffset.X; x < ourSize.X; x += texSize.X)
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{
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for (var y = -scaledOffset.Y; y < ourSize.Y; y += texSize.Y)
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{
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handle.DrawTextureRect(tex, UIBox2.FromDimensions((x, y), texSize));
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}
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}
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}
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else
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{
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var origin = ((ourSize - texSize) / 2) + layer.Config.ControlHomePosition;
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handle.DrawTextureRect(tex, UIBox2.FromDimensions(origin, texSize));
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}
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}
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}
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}
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