96 lines
3.5 KiB
C#
96 lines
3.5 KiB
C#
using System.Numerics;
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using Content.Client.Parallax.Data;
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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.Prototypes;
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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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private string _parallaxPrototype = "FastSpace";
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[ViewVariables(VVAccess.ReadWrite)] public Vector2 Offset { get; set; }
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[ViewVariables(VVAccess.ReadWrite)] public float SpeedX { get; set; } = 0.0f;
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[ViewVariables(VVAccess.ReadWrite)] public float SpeedY { get; set; } = 0.0f;
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[ViewVariables(VVAccess.ReadWrite)] public float ScaleX { get; set; } = 1.0f;
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[ViewVariables(VVAccess.ReadWrite)] public float ScaleY { get; set; } = 1.0f;
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[ViewVariables(VVAccess.ReadWrite)] public string ParallaxPrototype
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{
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get => _parallaxPrototype;
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set
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{
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_parallaxPrototype = value;
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_parallaxManager.LoadParallaxByName(value);
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}
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}
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public ParallaxControl()
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{
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IoCManager.InjectDependencies(this);
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Offset = new Vector2(_random.Next(0, 1000), _random.Next(0, 1000));
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RectClipContent = true;
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_parallaxManager.LoadParallaxByName(_parallaxPrototype);
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}
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protected override void Draw(DrawingHandleScreen handle)
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{
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var currentTime = (float) _timing.RealTime.TotalSeconds;
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var offset = Offset + new Vector2(currentTime * SpeedX, currentTime * SpeedY);
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foreach (var layer in _parallaxManager.GetParallaxLayers(_parallaxPrototype))
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{
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var tex = layer.Texture;
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var texSize = new Vector2i(
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(int)(tex.Size.X * Size.X * layer.Config.Scale.X / 1920 * ScaleX),
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(int)(tex.Size.Y * Size.X * layer.Config.Scale.Y / 1920 * ScaleY)
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);
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var ourSize = PixelSize;
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//Protection from division by zero.
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texSize.X = Math.Max(texSize.X, 1);
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texSize.Y = Math.Max(texSize.Y, 1);
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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(new Vector2(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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