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Code Issues Releases Wiki Activity

Optimized noise layer

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This commit is contained in:
SpoinkyNL 2019-12-07 16:03:14 +01:00
parent f91ea0f992
commit c99e549101
3 changed files with 34 additions and 16 deletions
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1
src/Artemis.Core/Artemis.Core.csproj
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@ -159,6 +159,7 @@
<Compile Include="Exceptions\ArtemisCoreException.cs" />
<Compile Include="Extensions\DirectoryInfoExtensions.cs" />
<Compile Include="Extensions\DoubleExtensions.cs" />
<Compile Include="Extensions\FloatExtensions.cs" />
<Compile Include="Extensions\RgbColorExtensions.cs" />
<Compile Include="Extensions\RgbDeviceExtensions.cs" />
<Compile Include="Extensions\RgbRectangleExtensions.cs" />

12
src/Artemis.Core/Extensions/FloatExtensions.cs Normal file
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@ -0,0 +1,12 @@
using System;
namespace Artemis.Core.Extensions
{
public static class FloatExtensions
{
public static int RoundToInt(this float number)
{
return (int)Math.Round(number, MidpointRounding.AwayFromZero);
}
}
}

37
src/Artemis.Plugins.LayerElements.Noise/NoiseLayerElement.cs
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@ -7,16 +7,16 @@ namespace Artemis.Plugins.LayerElements.Noise
{
public class NoiseLayerElement : LayerElement
{
private static Random _rand = new Random();
private const int Scale = 6;
private static readonly Random Rand = new Random();
private readonly OpenSimplexNoise _noise;
private float _z;
private const int Scale = 6;
public NoiseLayerElement(Layer layer, Guid guid, NoiseLayerElementSettings settings, LayerElementDescriptor descriptor) : base(layer, guid, settings, descriptor)
{
Settings = settings;
_z = _rand.Next(0, 4096);
_z = Rand.Next(0, 4096);
_noise = new OpenSimplexNoise(Guid.GetHashCode());
}
@ -41,25 +41,30 @@ namespace Artemis.Plugins.LayerElements.Noise
public override void Render(SKPath framePath, SKCanvas canvas)
{
// Scale down the render path
var width = (int) Math.Round(Math.Max(Layer.RenderRectangle.Width, Layer.RenderRectangle.Height) / Scale);
var height = (int) Math.Round(Math.Max(Layer.RenderRectangle.Width, Layer.RenderRectangle.Height) / Scale);
// Scale down the render path to avoid computing a value for every pixel
var width = (int) (Math.Max(Layer.RenderRectangle.Width, Layer.RenderRectangle.Height) / Scale);
var height = (int) (Math.Max(Layer.RenderRectangle.Width, Layer.RenderRectangle.Height) / Scale);
using (var bitmap = new SKBitmap(new SKImageInfo(width, height)))
{
for (var x = 0; x < width; x++)
// Only compute pixels inside LEDs, due to scaling there may be some rounding issues but it's neglect-able
foreach (var artemisLed in Layer.Leds)
{
for (var y = 0; y < height; y++)
{
// This check is actually more expensive then _noise.Evaluate() ^.^'
// if (!framePath.Contains(x * Scale, y * Scale))
// continue;
var xStart = artemisLed.AbsoluteRenderRectangle.Left / Scale;
var xEnd = artemisLed.AbsoluteRenderRectangle.Right / Scale;
var yStart = artemisLed.AbsoluteRenderRectangle.Top / Scale;
var yEnd = artemisLed.AbsoluteRenderRectangle.Bottom / Scale;
var v = _noise.Evaluate(Settings.XScale * x / width, Settings.YScale * y / height, _z);
bitmap.SetPixel(x, y, new SKColor(0, 0, 0, (byte) ((v + 1) * 127)));
for (var x = xStart; x < xEnd; x++)
{
for (var y = yStart; y < yEnd; y++)
{
var v = _noise.Evaluate(Settings.XScale * x / width, Settings.YScale * y / height, _z);
bitmap.SetPixel((int) x, (int) y, new SKColor(0, 0, 0, (byte) ((v + 1) * 127)));
}
}
}
using (var sh = SKShader.CreateBitmap(bitmap, SKShaderTileMode.Mirror, SKShaderTileMode.Mirror, SKMatrix.MakeScale(Scale, Scale)))
using (var paint = new SKPaint {Shader = sh})
{