public bool LoadFromKtx(string path)
{
string iblPath = path + "_ibl.ktx";
if (!File.Exists(iblPath))
{
return(false);
}
string skyPath = path + "_skybox.ktx";
if (!File.Exists(skyPath))
{
return(false);
}
var iblKtx = CreateKtx(iblPath);
var skyKtx = CreateKtx(skyPath);
_skyboxTexture = KtxUtility.CreateTexture(_engine, skyKtx, false);
_texture = KtxUtility.CreateTexture(_engine, iblKtx, false);
if (!iblKtx.GetSphericalHarmonics(out _bands))
{
return(false);
}
IndirectLight = IndirectLightBuilder.Create()
.WithReflections(_texture)
.WithIntensity(Intensity)
.Build(_engine);
Skybox = SkyboxBuilder.Create()
.WithEnvironment(_skyboxTexture)
.WithSun(true)
.Build(_engine);
return(true);
}
public bool LoadFromDirectory(string path)
{
// First check if KTX files are available.
if (LoadFromKtx(Path.Combine(path, Path.GetFileName(path))))
{
return(true);
}
// Read spherical harmonics
string sh = Path.Combine(path, "sh.txt");
var pattern = new Regex(@"^\([\s]{0,}(.+),[\s]{0,}(.+),[\s]{0,}(.+)\)", RegexOptions.Compiled);
if (File.Exists(sh))
{
var lines = File.ReadAllLines(sh);
if (lines.Length != _bands.Length)
{
return(false);
}
for (var i = 0; i < _bands.Length; i++)
{
var matches = pattern.Matches(lines[i]);
if (!pattern.IsMatch(lines[0]))
{
return(false);
}
var parts = matches[0].Groups;
if (!float.TryParse(parts[1].Value, out var r))
{
return(false);
}
if (!float.TryParse(parts[2].Value, out var g))
{
return(false);
}
if (!float.TryParse(parts[3].Value, out var b))
{
return(false);
}
_bands[i] = new Vector3(r, g, b);
}
}
else
{
return(false);
}
// Read mip-mapped cubemap
string prefix = "m";
if (!LoadCubemapLevel(ref _texture, path, 0, prefix + "0_"))
{
return(false);
}
int numLevels = _texture.Levels;
for (var i = 1; i < numLevels; i++)
{
LoadCubemapLevel(ref _texture, path, i, prefix + i + "_");
}
if (!LoadCubemapLevel(ref _skyboxTexture, path))
{
return(false);
}
IndirectLight = IndirectLightBuilder.Create()
.WithReflections(_texture)
.WithIrradiance(3, _bands)
.WithIntensity(Intensity)
.Build(_engine);
Skybox = SkyboxBuilder.Create()
.WithEnvironment(_skyboxTexture)
.WithSun(true)
.Build(_engine);
return(true);
}