76 lines
2.5 KiB
C#
76 lines
2.5 KiB
C#
using System;
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using UnityEngine;
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using Random = UnityEngine.Random;
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namespace AllIn1VfxToolkit
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{
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public static class AllIn1VfxNoiseCreator
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{
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public static Texture2D PerlinNoise(Texture2D tex, float scale, int randomSeed, bool tileable)
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{
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int texWidth = tex.width;
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int texHeight = tex.height;
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Random.InitState(randomSeed);
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float randomOffset = Random.Range(-100f, 100f);
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for(int i = 0; i < texHeight; i++)
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{
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for(int j = 0; j < texWidth; j++)
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{
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tex.SetPixel(j, i, CalculatePerlinColor(j, i, scale, randomOffset, texWidth, texHeight));
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}
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}
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tex.Apply();
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Texture2D finalPerlin = new Texture2D(texHeight, texWidth);
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finalPerlin.SetPixels(tex.GetPixels());
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if(tileable)
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{
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for(int i = 0; i < texHeight; i++)
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{
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for(int j = 0; j < texWidth; j++)
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{
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finalPerlin.SetPixel(j, i, PerlinBorderless(j, i, scale, randomOffset, texWidth, texHeight, tex));
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}
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}
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}
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finalPerlin.Apply();
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return finalPerlin;
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}
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private static Color CalculatePerlinColor(int x, int y, float scale, float offset, int width, int height)
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{
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float xCoord = (x + offset) / width * scale;
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float yCoord = (y + offset) / height * scale;
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float perlin = Mathf.PerlinNoise(xCoord, yCoord);
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return new Color(perlin, perlin, perlin, 1);
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}
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private static Color PerlinBorderless(int x, int y, float scale, float offset, int width, int height, Texture2D previousPerlin)
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{
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int iniX = x;
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int iniY = y;
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float u = (float)x / width;
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float v = (float)y / height;
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if(u > 0.5f) x = width - x;
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if(v > 0.5f) y = height - y;
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offset += 23.43f;
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float xCoord = (x + offset) / width * scale;
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float yCoord = (y + offset) / height * scale;
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float perlin = Mathf.PerlinNoise(xCoord, yCoord);
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Color newPerlin = new Color(perlin, perlin, perlin, 1);
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float edge = Mathf.Max(u, v);
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edge = Mathf.Max(edge, Mathf.Max(1f - u, 1f - v));
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edge = Mathf.Pow(edge, 10f);
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return Color.Lerp(previousPerlin.GetPixel(iniX, iniY), newPerlin, edge);
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}
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}
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} |