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osu-lazer/osu.Game/Screens/Edit/Compose/Components/RectangularPositionSnapGrid.cs

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// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
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// See the LICENCE file in the repository root for full licence text.
using System;
using osu.Framework.Bindables;
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using osu.Game.Utils;
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using osuTK;
namespace osu.Game.Screens.Edit.Compose.Components
{
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public partial class RectangularPositionSnapGrid : LinedPositionSnapGrid
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{
/// <summary>
/// The spacing between grid lines of this <see cref="RectangularPositionSnapGrid"/>.
/// </summary>
public Bindable<Vector2> Spacing { get; } = new Bindable<Vector2>(Vector2.One);
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/// <summary>
/// The rotation in degrees of the grid lines of this <see cref="RectangularPositionSnapGrid"/>.
/// </summary>
public BindableFloat GridLineRotation { get; } = new BindableFloat();
public RectangularPositionSnapGrid()
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{
Spacing.BindValueChanged(_ => GridCache.Invalidate());
GridLineRotation.BindValueChanged(_ => GridCache.Invalidate());
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}
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protected override void CreateContent()
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{
var drawSize = DrawSize;
var rot = Quaternion.FromAxisAngle(Vector3.UnitZ, MathHelper.DegreesToRadians(GridLineRotation.Value));
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GenerateGridLines(Vector2.Transform(new Vector2(0, -Spacing.Value.Y), rot), drawSize);
GenerateGridLines(Vector2.Transform(new Vector2(0, Spacing.Value.Y), rot), drawSize);
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GenerateGridLines(Vector2.Transform(new Vector2(-Spacing.Value.X, 0), rot), drawSize);
GenerateGridLines(Vector2.Transform(new Vector2(Spacing.Value.X, 0), rot), drawSize);
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GenerateOutline(drawSize);
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}
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public override Vector2 GetSnappedPosition(Vector2 original)
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{
Vector2 relativeToStart = GeometryUtils.RotateVector(original - StartPosition.Value, GridLineRotation.Value);
Vector2 offset = Vector2.Divide(relativeToStart, Spacing.Value);
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Vector2 roundedOffset = new Vector2(MathF.Round(offset.X), MathF.Round(offset.Y));
return StartPosition.Value + GeometryUtils.RotateVector(Vector2.Multiply(roundedOffset, Spacing.Value), -GridLineRotation.Value);
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}
}
}