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Multi-thread optimisation algorithm

tags/v1.1.0
NGnius (Graham) 3 years ago
parent
d2a2ce52f0
commit
84fc330b12
2 changed files with 213 additions and 109 deletions
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  1. +3
    -3
      Pixi/Common/ColorSpaceUtility.cs
  2. +210
    -106
      Pixi/Common/CommandRoot.cs

+ 3
- 3
Pixi/Common/ColorSpaceUtility.cs View File

@@ -19,7 +19,7 @@ namespace Pixi.Common
{
public static class ColorSpaceUtility
{
private const float optimal_delta = 0.2f;
private const float optimal_delta = 0.1f;

private static Dictionary<BlockColor, float[]> colorMap = null;

@@ -50,14 +50,14 @@ namespace Pixi.Common
if (geometricClosest < optimal_delta)
{
#if DEBUG
Logging.MetaLog($"Final delta ({closest[0]},{closest[1]},{closest[2]}) t:{geometricClosest}");
//Logging.MetaLog($"Final delta ({closest[0]},{closest[1]},{closest[2]}) t:{geometricClosest}");
#endif
return c;
}
}
}
#if DEBUG
Logging.MetaLog($"Final delta ({closest[0]},{closest[1]},{closest[2]}) t:{geometricClosest}");
//Logging.MetaLog($"Final delta ({closest[0]},{closest[1]},{closest[2]}) t:{geometricClosest}");
#endif
return c;
}


+ 210
- 106
Pixi/Common/CommandRoot.cs View File

@@ -1,7 +1,9 @@
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Runtime.CompilerServices;
using System.Threading;
using UnityEngine;
using Unity.Mathematics;
using Svelto.ECS;
@@ -10,6 +12,7 @@ using GamecraftModdingAPI;
using GamecraftModdingAPI.Blocks;
using GamecraftModdingAPI.Commands;
using GamecraftModdingAPI.Utility;
using Svelto.DataStructures;

namespace Pixi.Common
{
@@ -40,6 +43,8 @@ namespace Pixi.Common
public string Description { get; } = "Import something into Gamecraft using magic. Usage: Pixi \"myfile.png\"";
public Dictionary<int, Importer[]> importers = new Dictionary<int, Importer[]>();
public static ThreadSafeDictionary<int, bool> optimisableBlockCache = new ThreadSafeDictionary<int, bool>();

public const float BLOCK_SIZE = 0.2f;
@@ -47,6 +52,52 @@ namespace Pixi.Common

public static int OPTIMISATION_PASSES = 2;

public static int GROUP_SIZE = 64;
// optimisation algorithm constants
private static float3[] cornerMultiplicands1 = new float3[8]
{
new float3(1, 1, 1),
new float3(1, 1, -1),
new float3(-1, 1, 1),
new float3(-1, 1, -1),
new float3(-1, -1, 1),
new float3(-1, -1, -1),
new float3(1, -1, 1),
new float3(1, -1, -1),
};
private static float3[] cornerMultiplicands2 = new float3[8]
{
new float3(1, 1, 1),
new float3(1, 1, -1),
new float3(1, -1, 1),
new float3(1, -1, -1),
new float3(-1, 1, 1),
new float3(-1, 1, -1),
new float3(-1, -1, 1),
new float3(-1, -1, -1),
};
private static int[][] cornerFaceMappings = new int[][]
{
new int[] {0, 1, 2, 3}, // top
new int[] {2, 3, 4, 5}, // left
new int[] {4, 5, 6, 7}, // bottom
new int[] {6, 7, 0, 1}, // right
new int[] {0, 2, 4, 6}, // back
new int[] {1, 3, 5, 7}, // front
};
private static int[][] oppositeFaceMappings = new int[][]
{
new int[] {6, 7, 4, 5}, // bottom
new int[] {0, 1, 6, 7}, // right
new int[] {2, 3, 0, 1}, // top
new int[] {4, 5, 2, 3}, // left
new int[] {1, 3, 5, 7}, // front
new int[] {0, 2, 4, 6}, // back
};

public CommandRoot()
{
CommandManager.AddCommand(this);
@@ -144,7 +195,7 @@ namespace Pixi.Common
{
for (int pass = 0; pass < OPTIMISATION_PASSES; pass++)
{
OptimiseBlocks(ref optVONs);
OptimiseBlocks(ref optVONs, (pass + 1) * GROUP_SIZE);
#if DEBUG
Logging.MetaLog($"Optimisation pass {pass} completed");
#endif
@@ -179,7 +230,66 @@ namespace Pixi.Common
}

private void OptimiseBlocks(ref List<ProcessedVoxelObjectNotation> optVONs)
private void OptimiseBlocks(ref List<ProcessedVoxelObjectNotation> optVONs, int chunkSize)
{
// Reduce blocks to place to reduce lag while placing and from excessive blocks in the world.
// Blocks are reduced by grouping similar blocks that are touching (before they're placed)
// multithreaded because this is an expensive (slow) operation
int item = 0;
ProcessedVoxelObjectNotation[][] groups = new ProcessedVoxelObjectNotation[optVONs.Count / chunkSize][];
Thread[] tasks = new Thread[groups.Length];
while (item < groups.Length)
{
groups[item] = new ProcessedVoxelObjectNotation[chunkSize];
optVONs.CopyTo(item * chunkSize, groups[item], 0, chunkSize);
int tmpItem = item; // scope is dumb
tasks[item] = new Thread(() =>
{
groups[tmpItem] = groupBlocksBestEffort(groups[tmpItem], tmpItem);
});
tasks[item].Start();
item++;
}
#if DEBUG
Logging.MetaLog($"Created {groups.Length} + 1? groups");
#endif
// final group
ProcessedVoxelObjectNotation[] finalGroup = null;
Thread finalThread = null;
if (optVONs.Count > item * chunkSize)
{
//finalGroup = optVONs.GetRange(item * GROUP_SIZE, optVONs.Count - (item * GROUP_SIZE)).ToArray();
finalGroup = new ProcessedVoxelObjectNotation[optVONs.Count - (item * chunkSize)];
optVONs.CopyTo(item * chunkSize, finalGroup, 0, optVONs.Count - (item * chunkSize));
finalThread = new Thread(() =>
{
finalGroup = groupBlocksBestEffort(finalGroup, -1);
});
finalThread.Start();
}
// gather results
List<ProcessedVoxelObjectNotation> result = new List<ProcessedVoxelObjectNotation>();
for (int i = 0; i < groups.Length; i++)
{
#if DEBUG
Logging.MetaLog($"Waiting for completion of task {i}");
#endif
tasks[i].Join();
result.AddRange(groups[i]);
}

if (finalThread != null)
{
#if DEBUG
Logging.MetaLog($"Waiting for completion of final task");
#endif
finalThread.Join();
result.AddRange(finalGroup);
}
optVONs = result;
}

private static ProcessedVoxelObjectNotation[] groupBlocksBestEffort(ProcessedVoxelObjectNotation[] blocksToOptimise, int id)
{
// a really complicated algorithm to determine if two similar blocks are touching (before they're placed)
// the general concept:
@@ -194,89 +304,99 @@ namespace Pixi.Common
// this means it's not safe to assume that block A's common face (top) can be swapped with block B's non-common opposite face (top) to get the merged block
//
// note2: this does not work with blocks which aren't cubes (i.e. any block where rotation matters)
// TODO multithread this expensive operation
int item = 0;
while (item < optVONs.Count)
try
{
bool isItemUpdated = false;
ProcessedVoxelObjectNotation itemVON = optVONs[item];
if (isOptimisableBlock(itemVON.block))
#if DEBUG
Stopwatch timer = Stopwatch.StartNew();
#endif
FasterList<ProcessedVoxelObjectNotation> optVONs = new FasterList<ProcessedVoxelObjectNotation>(blocksToOptimise);
int item = 0;
while (item < optVONs.count - 1)
{
float3[] itemCorners = calculateCorners(itemVON);
int seeker = item + 1; // despite this, assume that seeker goes thru the entire list (not just blocks after item)
while (seeker < optVONs.Count)
#if DEBUG
Logging.MetaLog($"({id}) Now grouping item {item}/{optVONs.count} ({100f * item/(float)optVONs.count}%)");
#endif
bool isItemUpdated = false;
ProcessedVoxelObjectNotation itemVON = optVONs[item];
if (isOptimisableBlock(itemVON.block))
{
if (seeker == item)
{
seeker++;
}
else
float3[] itemCorners = calculateCorners(itemVON);
int seeker = item + 1; // despite this, assume that seeker goes thru the entire list (not just blocks after item)
while (seeker < optVONs.count)
{
ProcessedVoxelObjectNotation seekerVON = optVONs[seeker];
//Logging.MetaLog($"Comparing {itemVON} and {seekerVON}");
float3[] seekerCorners = calculateCorners(seekerVON);
int[][] mapping = findMatchingCorners(itemCorners, seekerCorners);
if (mapping.Length != 0
&& itemVON.block == seekerVON.block
&& itemVON.color.Color == seekerVON.color.Color
&& itemVON.color.Darkness == seekerVON.color.Darkness
&& isOptimisableBlock(seekerVON.block)) // match found
if (seeker == item)
{
// switch out corners based on mapping
//Logging.MetaLog($"Corners {float3ArrToString(itemCorners)}\nand {float3ArrToString(seekerCorners)}");
//Logging.MetaLog($"Mappings (len:{mapping[0].Length}) {mapping[0][0]} -> {mapping[1][0]}\n{mapping[0][1]} -> {mapping[1][1]}\n{mapping[0][2]} -> {mapping[1][2]}\n{mapping[0][3]} -> {mapping[1][3]}\n");
for (byte i = 0; i < 4; i++)
seeker++;
}
else
{
ProcessedVoxelObjectNotation seekerVON = optVONs[seeker];
//Logging.MetaLog($"Comparing {itemVON} and {seekerVON}");
float3[] seekerCorners = calculateCorners(seekerVON);
int[][] mapping = findMatchingCorners(itemCorners, seekerCorners);
if (mapping.Length != 0
&& itemVON.block == seekerVON.block
&& itemVON.color.Color == seekerVON.color.Color
&& itemVON.color.Darkness == seekerVON.color.Darkness
&& isOptimisableBlock(seekerVON.block)) // match found
{
itemCorners[mapping[0][i]] = seekerCorners[mapping[1][i]];
// switch out corners based on mapping
//Logging.MetaLog($"Corners {float3ArrToString(itemCorners)}\nand {float3ArrToString(seekerCorners)}");
//Logging.MetaLog($"Mappings (len:{mapping[0].Length}) {mapping[0][0]} -> {mapping[1][0]}\n{mapping[0][1]} -> {mapping[1][1]}\n{mapping[0][2]} -> {mapping[1][2]}\n{mapping[0][3]} -> {mapping[1][3]}\n");
for (byte i = 0; i < 4; i++)
{
itemCorners[mapping[0][i]] = seekerCorners[mapping[1][i]];
}
// remove 2nd block, since it's now part of the 1st block
//Logging.MetaLog($"Removing {seekerVON}");
optVONs.RemoveAt(seeker);
if (seeker < item)
{
item--; // note: this will never become less than 0
}
isItemUpdated = true;
// regenerate info
//Logging.MetaLog($"Final corners {float3ArrToString(itemCorners)}");
updateVonFromCorners(itemCorners, ref itemVON);
itemCorners = calculateCorners(itemVON);
//Logging.MetaLog($"Merged block is {itemVON}");
}
// remove 2nd block, since it's now part of the 1st block
//Logging.MetaLog($"Removing {seekerVON}");
optVONs.RemoveAt(seeker);
if (seeker < item)
else
{
item--; // note: this will never become less than 0
seeker++;
}
isItemUpdated = true;
// regenerate info
//Logging.MetaLog($"Final corners {float3ArrToString(itemCorners)}");
updateVonFromCorners(itemCorners, ref itemVON);
itemCorners = calculateCorners(itemVON);
//Logging.MetaLog($"Merged block is {itemVON}");
}
else
{
seeker++;
}
}
}

if (isItemUpdated)
if (isItemUpdated)
{
optVONs[item] = itemVON;
//Logging.MetaLog($"Optimised block is now {itemVON}");
}
item++;
}
else
{
optVONs[item] = itemVON;
//Logging.MetaLog($"Optimised block is now {itemVON}");
item++;
}
item++;
}
else
{
item++;
}
#if DEBUG
timer.Stop();
Logging.MetaLog($"({id}) Completed best effort grouping of range in {timer.ElapsedMilliseconds}ms");
#endif
return optVONs.ToArray();
}
catch (Exception e)
{
Logging.MetaLog($"({id}) Exception occured...\n{e.ToString()}");
}

return blocksToOptimise;
}

private float3[] calculateCorners(ProcessedVoxelObjectNotation von)
[MethodImpl(MethodImplOptions.AggressiveInlining)]
private static float3[] calculateCorners(ProcessedVoxelObjectNotation von)
{
float3[] cornerMultiplicands = new float3[8]
{
new float3(1, 1, 1),
new float3(1, 1, -1),
new float3(-1, 1, 1),
new float3(-1, 1, -1),
new float3(-1, -1, 1),
new float3(-1, -1, -1),
new float3(1, -1, 1),
new float3(1, -1, -1),
};
float3[] corners = new float3[8];
Quaternion rotation = Quaternion.Euler(von.rotation);
float3 rotatedScale = rotation * von.scale;
@@ -284,24 +404,14 @@ namespace Pixi.Common
// generate corners
for (int i = 0; i < corners.Length; i++)
{
corners[i] = trueCenter + BLOCK_SIZE * (cornerMultiplicands[i] * rotatedScale / 2);
corners[i] = trueCenter + BLOCK_SIZE * (cornerMultiplicands1[i] * rotatedScale / 2);
}
return corners;
}

private void updateVonFromCorners(float3[] corners, ref ProcessedVoxelObjectNotation von)
[MethodImpl(MethodImplOptions.AggressiveInlining)]
private static void updateVonFromCorners(float3[] corners, ref ProcessedVoxelObjectNotation von)
{
float3[] cornerMultiplicands = new float3[8]
{
new float3(1, 1, 1),
new float3(1, 1, -1),
new float3(1, -1, 1),
new float3(1, -1, -1),
new float3(-1, 1, 1),
new float3(-1, 1, -1),
new float3(-1, -1, 1),
new float3(-1, -1, -1),
};
float3 newCenter = sumOfFloat3Arr(corners) / corners.Length;
float3 newPosition = newCenter;
Quaternion rot = Quaternion.Euler(von.rotation);
@@ -311,26 +421,9 @@ namespace Pixi.Common
//Logging.MetaLog($"Updated VON scale {von.scale} (absolute {rotatedScale})");
}
private int[][] findMatchingCorners(float3[] corners1, float3[] corners2)
[MethodImpl(MethodImplOptions.AggressiveInlining)]
private static int[][] findMatchingCorners(float3[] corners1, float3[] corners2)
{
int[][] cornerFaceMappings = new int[][]
{
new int[] {0, 1, 2, 3}, // top
new int[] {2, 3, 4, 5}, // left
new int[] {4, 5, 6, 7}, // bottom
new int[] {6, 7, 0, 1}, // right
new int[] {0, 2, 4, 6}, // back
new int[] {1, 3, 5, 7}, // front
};
int[][] oppositeFaceMappings = new int[][]
{
new int[] {6, 7, 4, 5}, // bottom
new int[] {0, 1, 6, 7}, // right
new int[] {2, 3, 0, 1}, // top
new int[] {4, 5, 2, 3}, // left
new int[] {1, 3, 5, 7}, // front
new int[] {0, 2, 4, 6}, // back
};
float3[][] faces1 = facesFromCorners(corners1);
float3[][] faces2 = facesFromCorners(corners2);
for (byte i = 0; i < faces1.Length; i++)
@@ -355,7 +448,8 @@ namespace Pixi.Common
}
// this assumes the corners are in the order that calculateCorners outputs
private float3[][] facesFromCorners(float3[] corners)
[MethodImpl(MethodImplOptions.AggressiveInlining)]
private static float3[][] facesFromCorners(float3[] corners)
{
return new float3[][]
{
@@ -368,7 +462,8 @@ namespace Pixi.Common
};
}

private int[] matchFace(float3[] face1, float3[] face2)
[MethodImpl(MethodImplOptions.AggressiveInlining)]
private static int[] matchFace(float3[] face1, float3[] face2)
{
int[] result = new int[4];
byte count = 0;
@@ -396,7 +491,8 @@ namespace Pixi.Common
return new int[0];
}

private float3 sumOfFloat3Arr(float3[] arr)
[MethodImpl(MethodImplOptions.AggressiveInlining)]
private static float3 sumOfFloat3Arr(float3[] arr)
{
float3 total = float3.zero;
for (int i = 0; i < arr.Length; i++)
@@ -408,12 +504,19 @@ namespace Pixi.Common
}

[MethodImpl(MethodImplOptions.AggressiveInlining)]
private bool isOptimisableBlock(BlockIDs block)
private static bool isOptimisableBlock(BlockIDs block)
{
return block.ToString().EndsWith("Cube", StringComparison.InvariantCultureIgnoreCase);
if (optimisableBlockCache.ContainsKey((int) block))
{
return optimisableBlockCache[(int) block];
}

bool result = block.ToString().EndsWith("Cube", StringComparison.InvariantCultureIgnoreCase);
optimisableBlockCache[(int) block] = result;
return result;
}

private string float3ArrToString(float3[] arr)
private static string float3ArrToString(float3[] arr)
{
string result = "[";
foreach (float3 f in arr)
@@ -434,10 +537,11 @@ namespace Pixi.Common
catch (Exception e)
{
#if DEBUG
Logging.CommandLogError("RIP\n" + e);
Logging.CommandLogError("RIP Pixi\n" + e);
#else
Logging.CommandLogError("Pixi failed (reason: " + e.Message + ")");
Logging.CommandLogError("Pixi failed (reason: " + e.Message + ")");
#endif
Logging.LogWarning("Pixi Error\n" + e);
}
}
}