//public async static Task<Texture3D> ShowNoise3DSeamlessAsync(int width, int height, int depth, Vector3 offset, int octave, float f, float a, INoisCreater creater)
//{
// Texture3D[] tex4D = new Texture3D[depth];
// await Task.Run(() =>
// {
// for (int i = 0; i < depth; i++)
// {
// tex4D[i] = ShowNoise3D(width, height, depth, offset, octave, f, a, creater);
// }
// });
// Texture3D tex = new Texture3D(width, height, depth, TextureFormat.RGBA32, false);
// float halfW = width / 2f;
// float theta = 2 * Mathf.PI / (float)width;
// await Task.Run(() =>
// {
// for (int x = 0; x < width; x++)
// {
// for (int y = 0; y < height; y++)
// {
// for (int z = 0; z < depth; z++)
// {
// float nx = halfW + Mathf.Cos(x * theta) * halfW;
// float ny = halfW + Mathf.Sin(y * theta) * halfW;
// int fx = (int)nx;
// int fy = (int)ny;
// Color col = tex4D[z].GetPixel(fx, fy, y);
// tex.SetPixel(x, y, z, col);
// }
// }
// }
// });
// tex.Apply();
// return tex;
//}
#endregion
//private static IEnumerator ShowNoise3DSeamlessCor(int width, int height, int depth, Vector3 offset, int octave, float f, float a, INoisCreater creater, Action<Texture3D> callback)
//{
// Texture3D tex = null;
// yield return tex = ShowNoise3DSeamless(width, height, depth, offset, octave, f, a, creater);
// if (tex != null) callback.Invoke(tex);
// else Debug.LogError("3D 无缝纹理 生成失败！");
//}
public static Texture3D ShowNoise3DSeamless(int width, int height, int depth, Vector3 offset, int octave, float f, float a, INoisCreater creater)
{
//Texture3D tex4D = null;
Vector3 offset4D = Vector3.zero;
int width4D = (int)(width / (2 * Mathf.PI) + 2);
//for(int i = 0; i < depth; i++)
//{
// offset4D += Vector3.one * depth;
// tex4D = ShowNoise3D(width4D, width4D, height, offset4D, octave, f, a, creater);
// AssetDatabase.CreateAsset(tex4D, "Assets/Temp/Temp/" + i + ".asset");
//}
//AssetDatabase.SaveAssets();
Texture3D tex = new Texture3D(width, height, depth, TextureFormat.RGBA32, false);
float halfW = width4D / 2f;
float theta = 2 * Mathf.PI / (float)width;
for (int x = 0; x < width; x++)
{
for (int y = 0; y < height; y++)
{
for (int z = 0; z < depth; z++)
{
float nx = halfW + Mathf.Cos(x * theta) * width4D;
float ny = halfW + Mathf.Sin(y * theta) * width4D;
int fx = (int)nx;
int fy = (int)ny;
float frequency = 1;
float ambitient = 1;
for (int i = 0; i < octave; i++)
{
frequency *= f;
ambitient *= a;
}
float noise1 = creater.Get3D((fx + offset.x) * frequency, (fy + offset.y) * frequency, (y + offset.z) * frequency);
float noise2 = creater.Get3D((fx + offset.x) * frequency, (fy + offset.y) * frequency, (z + offset.z) * frequency);
float noise = ambitient * (noise1 + noise2) / 2f;
tex.SetPixel(x, y, z, new Color(0.5f * noise, 0.5f * noise, 0.5f * noise, 0.5f * noise));
//AssetDatabase.DeleteAsset("Assets/Resources/Temp/" + z + ".asset");
}
}
}
tex.Apply();
//for (int z = 0; z < depth; z++)
//{
// AssetDatabase.DeleteAsset("Assets/Temp/Temp/" + z + ".asset");
//}
return(tex);
}
public static Texture3D ShowNoise3D(int width, int height, int depth, Vector3 offset, int octave, float f, float a, INoisCreater creater)
{
Texture3D tex = new Texture3D(width, height, depth, TextureFormat.RGBA32, false);
for (int x = 0; x < width; x++)
{
for (int y = 0; y < height; y++)
{
for (int z = 0; z < depth; z++)
{
float frequency = 1;
float ambitient = 1;
for (int i = 0; i < octave; i++)
{
frequency *= f;
ambitient *= a;
}
float noise = creater.Get3D((x + offset.x) * frequency, (y + offset.y) * frequency, (z + offset.z) * frequency) * ambitient;
tex.SetPixel(x, y, z, new Color(0.5f * noise, 0.5f * noise, 0.5f * noise, 0.5f * noise));
}
}
}
tex.Apply();
return(tex);
}
public static Texture2D ShowNoise2DSeamless(int width, int height, Vector3 offset, int octave, float f, float a, INoisCreater creater)
{
//Texture3D uperTex = ShowNoise3D(width, width, height, offset, octave, f, a, creater);
Texture2D tex = new Texture2D(width, height);
float theta = 2 * Mathf.PI / (float)width;
float width3D = width / (2 * Mathf.PI);
int halfW = (int)width3D / 2;
for (int x = 0; x < width; x++)
{
for (int y = 0; y < height; y++)
{
float nx = halfW + Mathf.Sin(x * theta) * width3D;
float ny = halfW + Mathf.Cos(x * theta) * width3D;
int fx = (int)nx;
int fy = (int)ny;
float frequency = 1;
float ambitient = 1;
for (int i = 0; i < octave; i++)
{
frequency *= f;
ambitient *= a;
}
float noise = ambitient * creater.Get3D((fx + offset.x) * frequency, (fy + offset.y) * frequency, (y + offset.z) * frequency);
tex.SetPixel(x, y, new Color(0.5f * noise, 0.5f * noise, 0.5f * noise, 0.5f * noise));
}
}
//tex.wrapMode = TextureWrapMode.Repeat;
tex.Apply();
return(tex);
}