alysbrooks-public » games » isometric-park-fna

Location: alysbrooks-public/games/isometric-park-fna/ImGui.NET/ImVector.cs

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Commit Description:
Optimize PreserveCounts and only recalculate when needed....
Commit Description:
Optimize PreserveCounts and only recalculate when needed. Previously would recalculate preservecounts every Update call (~1 per frame), which isn't necessary when there's no tick. Might be some room to tweak, like doing these updates only when preserves change. Some measurements: This takes about 30ms versus the .25 ms with no preserve (then like .0002ms). When the map is filled up with preserve, about 35ms and 9ms. With a handful of cells, it's more like 0.8ms (before JIT optimizes most of it away).
References:
r589:842194b6bfa6 m6-tiles-and-trees
File last commit:
r16:2e10c6ae1d70 default
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ImGui.NET/ImVector.cs
75 lines | 1.9 KiB | text/x-csharp | CSharpLexer
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using System;
using System.Runtime.CompilerServices;
namespace ImGuiNET
{
public unsafe struct ImVector
{
public readonly int Size;
public readonly int Capacity;
public readonly IntPtr Data;
public ref T Ref<T>(int index)
{
return ref Unsafe.AsRef<T>((byte*)Data + index * Unsafe.SizeOf<T>());
}
public IntPtr Address<T>(int index)
{
return (IntPtr)((byte*)Data + index * Unsafe.SizeOf<T>());
}
}
public unsafe struct ImVector<T>
{
public readonly int Size;
public readonly int Capacity;
public readonly IntPtr Data;
public ImVector(ImVector vector)
{
Size = vector.Size;
Capacity = vector.Capacity;
Data = vector.Data;
}
public ImVector(int size, int capacity, IntPtr data)
{
Size = size;
Capacity = capacity;
Data = data;
}
public ref T this[int index] => ref Unsafe.AsRef<T>((byte*)Data + index * Unsafe.SizeOf<T>());
}
public unsafe struct ImPtrVector<T>
{
public readonly int Size;
public readonly int Capacity;
public readonly IntPtr Data;
private readonly int _stride;
public ImPtrVector(ImVector vector, int stride)
: this(vector.Size, vector.Capacity, vector.Data, stride)
{ }
public ImPtrVector(int size, int capacity, IntPtr data, int stride)
{
Size = size;
Capacity = capacity;
Data = data;
_stride = stride;
}
public T this[int index]
{
get
{
byte* address = (byte*)Data + index * _stride;
T ret = Unsafe.Read<T>(&address);
return ret;
}
}
}
}