Procedural Simplex Noise Texture

SimplexTexture.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using BaseX;

namespace FrooxEngine
{
    [Category("Assets/Procedural Textures")]
    public class SimplexTexture : ProceduralTexture
    {
        public readonly Sync<float2> Offset;
        public readonly Sync<float2> Scale;

        public readonly Sync<color> Background;
        public readonly Sync<color> Foreground;

        public readonly Sync<bool> Use3D;
        public readonly Sync<float> ZOffset;

        protected override IEnumerator<Context> UpdateTexture()
        {
            float2 off = Offset;
            float2 scale = Scale;
            bool _3d = Use3D;
            float zoff = ZOffset;
            color bg = Background;
            color fg = Foreground;

            yield return Context.ToBackground();

            for(int y = 0; y < tex2D.Size.y; y++)
                for (int x = 0; x < tex2D.Size.x; x++)
                {
                    // compute normalized position
                    float2 uv = new int2(x, y) / (float2)tex2D.Size;
                    uv *= scale;
                    uv += off;

                    float val = _3d ? MathX.SimplexNoise(new float3(uv, zoff)) : MathX.SimplexNoise(uv);
                    val *= 0.5f;
                    val += 0.5f;

                    tex2D.SetPixel(x, y, MathX.Lerp(bg, fg, val));
                }
        }

        protected override void OnInit()
        {
            base.OnInit();

            Scale.Value = float2.One;

            Background.Value = color.Black;
            Foreground.Value = color.White;
        }

        protected override void OnAttach()
        {
            base.OnAttach();
        }
    }
}