網上有很多,但大多使用Camera.RenderToCubemap接口,不能滿足需求。
寫了段代碼可以載入Texture2D生成Cubemap(在Editor下運作):
/// <summary>
/// Array order [Px, Py, Pz, Nx, Ny, Nz](Execute in editor)
/// </summary>
public static Cubemap BuildCubemap(Texture2D[] texs)
{
var p_x = texs[0];
var p_y = texs[1];
var p_z = texs[2];
var n_x = texs[3];
var n_y = texs[4];
var n_z = texs[5];
if (p_x.width != p_x.height) throw new System.Exception("Create Error! width != height");
var textureArr = new Texture2D[] { p_x, p_y, p_z, n_x, n_y, n_z };
for (int i = 0; i < textureArr.Length; i++)
{
var item = textureArr[i];
var path = AssetDatabase.GetAssetPath(item);
var textureImporter = AssetImporter.GetAtPath(path) as TextureImporter;
textureImporter.textureFormat = TextureImporterFormat.RGB24;
textureImporter.isReadable = true;
textureImporter.SaveAndReimport();
textureArr[i] = AssetDatabase.LoadAssetAtPath<Texture2D>(path);
}
var cubemap = new Cubemap(p_x.width, TextureFormat.RGB24, false);
//Set CubemapFace.(force fix texture format question).
cubemap.SetPixels(textureArr[0].GetPixels().Reverse().ToArray(), CubemapFace.PositiveX);
cubemap.SetPixels(textureArr[1].GetPixels().Reverse().ToArray(), CubemapFace.PositiveY);
cubemap.SetPixels(textureArr[2].GetPixels().Reverse().ToArray(), CubemapFace.PositiveZ);
cubemap.SetPixels(textureArr[3].GetPixels().Reverse().ToArray(), CubemapFace.NegativeX);
cubemap.SetPixels(textureArr[4].GetPixels().Reverse().ToArray(), CubemapFace.NegativeY);
cubemap.SetPixels(textureArr[5].GetPixels().Reverse().ToArray(), CubemapFace.NegativeZ);
cubemap.Apply();
return cubemap;
}
生成結果: