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Foothold

2D plane geometry benchmarks and experiments for a 2D game

🤔 Rundown

The current benchmarks tests against:

There are plans to benchmark BST and QuadTrees as well.

Benchmarks are also run on an exported v95.1 map of ID: 310000000 (iykyk)

📋 Benchmarks

All benchmarks published on this page is ran on the following specifications.

BenchmarkDotNet=v0.13.1, OS=macOS Monterey 12.4 (21F79) [Darwin 21.5.0]
Apple M1, 1 CPU, 8 logical and 8 physical cores
.NET SDK=6.0.301
  [Host]     : .NET 6.0.6 (6.0.622.26707), Arm64 RyuJIT
  DefaultJob : .NET 6.0.6 (6.0.622.26707), Arm64 RyuJIT

FindFootholdClosest

This method finds the nearest point from a given point.

Typically used for when finding the nearest spawnpoint in a field.

Method Point Mean Error StdDev Rank
RBush Point (0, 0) 45.64 μs 0.068 μs 0.057 μs 1
RBush Point (9000, 9000) 46.16 μs 0.372 μs 0.291 μs 1
RBush Point (429, 290) 47.00 μs 0.839 μs 0.784 μs 1
Array Point (9000, 9000) 56.74 μs 0.050 μs 0.042 μs 2
Array Point (0, 0) 58.02 μs 0.030 μs 0.026 μs 3
Array Point (429, 290) 58.39 μs 0.066 μs 0.051 μs 3

FindFootholdBelow

This method finds the nearest point, or segment in a straight line down from a given point.

Typically used for finding the line segment (floor) where a falling object will fall onto.

Method Point Mean Error StdDev Rank
RBush Point (9000, 9000) 95.84 ns 0.287 ns 0.269 ns 1
RBush Point (0, 0) 721.77 ns 8.947 ns 7.471 ns 2
RBush Point (429, 290) 931.71 ns 2.262 ns 1.889 ns 3
Array Point (9000, 9000) 19,159.15 ns 17.328 ns 15.361 ns 4
Array Point (429, 290) 34,256.11 ns 102.668 ns 91.013 ns 5
Array Point (0, 0) 40,552.03 ns 798.794 ns 784.523 ns 6

FindFootholdUnderneath

This method finds the point, or segment intersecting a given point.

Typically used for validating player object movements and positioning.

Method Point Mean Error StdDev Rank
RBush Point (9000, 9000) 105.6 ns 0.37 ns 0.32 ns 1
RBush Point (0, 0) 276.6 ns 0.13 ns 0.13 ns 2
RBush Point (429, 298) 366.1 ns 0.38 ns 0.32 ns 3
Array Point (9000, 9000) 76,319.4 ns 48.41 ns 40.42 ns 4
Array Point (429, 298) 78,222.4 ns 48.99 ns 45.82 ns 5
Array Point (0, 0) 78,715.4 ns 28.76 ns 26.90 ns 5

⭐️ Acknowledgements

  • Matthieu Tran - making me work on 2d mushroom game at gunpoint. (jk)
  • moe-miho - the project that inspired this.

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