52 lines
1.3 KiB
C#
52 lines
1.3 KiB
C#
using OpenTK.Mathematics;
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namespace Dashboard.Drawing.OpenGL
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{
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/// <summary>
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/// The current stack of transformations.
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/// </summary>
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public class TransformStack
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{
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private Matrix4 _top = Matrix4.Identity;
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private readonly Stack<Matrix4> _stack = new Stack<Matrix4>();
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/// <summary>
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/// The top-most transform matrix.
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/// </summary>
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public ref readonly Matrix4 Top => ref _top;
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/// <summary>
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/// The number of matrices in the stack.
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/// </summary>
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public int Count => _stack.Count;
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/// <summary>
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/// Push a transform.
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/// </summary>
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/// <param name="transform">The transform to push.</param>
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public void Push(in Matrix4 transform)
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{
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_stack.Push(_top);
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_top = transform * _top;
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}
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/// <summary>
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/// Pop a transform.
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/// </summary>
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public void Pop()
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{
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if (!_stack.TryPop(out _top))
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_top = Matrix4.Identity;
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}
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/// <summary>
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/// Clear the stack of transformations.
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/// </summary>
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public void Clear()
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{
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_stack.Clear();
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_top = Matrix4.Identity;
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}
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}
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}
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