private void TransformSpecularGlossiness(AssetContext asset, Texture texture, TextureReferences reference)
{
var specularGloss = texture as Texture2D;
EnsureReadableTexture(specularGloss);
var diffuse = reference.SmoothnessSource as Texture2D;
EnsureReadableTexture(diffuse);
var smoothnessSource =
reference.SmoothnessTextureChannel == SmoothnessTextureChannel.MetallicOrSpecularAlpha
? specularGloss
: diffuse;
var metallicRoughMapName = GetTextureOutputName(asset.UrhoAssetName, reference);
using (var fileStream = asset.DestinationFolder.Create(metallicRoughMapName))
{
if (fileStream != null)
{
var tmpTexture = CreateTargetTexture(specularGloss, diffuse);
var specularColors =
new PixelSource(specularGloss, tmpTexture.width, tmpTexture.height, Color.black);
var diffuseColors = new PixelSource(diffuse, tmpTexture.width, tmpTexture.height, Color.white);
var smoothnessColors = specularGloss == smoothnessSource
? specularColors
: diffuseColors;
var pixels = new Color32[tmpTexture.width * tmpTexture.height];
var index = 0;
for (var y = 0; y < tmpTexture.height; ++y)
{
for (var x = 0; x < tmpTexture.width; ++x)
{
var mr = PBRUtils.ConvertToMetallicRoughness(new PBRUtils.SpecularGlossiness
{
diffuse = diffuseColors.GetAt(x, y),
specular = specularColors.GetAt(x, y),
glossiness = smoothnessColors.GetAt(x, y).a,
opacity = 1.0f
});
pixels[index] = new Color(mr.roughness, mr.metallic, 0, 1);
++index;
}
}
tmpTexture.SetPixels32(pixels, 0);
var bytes = tmpTexture.EncodeToPNG();
fileStream.Write(bytes, 0, bytes.Length);
}
}
}
private void TransformMetallicGlossiness(AssetContext asset, Texture texture, TextureReferences reference)
{
var metallicGloss = texture as Texture2D;
EnsureReadableTexture(metallicGloss);
var smoothnessSource = reference.SmoothnessSource as Texture2D;
EnsureReadableTexture(smoothnessSource);
var metallicRoughMapName = GetTextureOutputName(asset.UrhoAssetName, reference);
using (var fileStream = asset.DestinationFolder.Create(metallicRoughMapName))
{
if (fileStream != null)
{
var tmpTexture = CreateTargetTexture(metallicGloss, reference.SmoothnessSource as Texture2D);
var metallicColors = new PixelSource(metallicGloss, tmpTexture.width, tmpTexture.height,
new Color(0, 0, 0, 0));
var smoothnessColors = metallicGloss == smoothnessSource
? metallicColors
: new PixelSource(smoothnessSource, tmpTexture.width, tmpTexture.height, new Color(0, 0, 0, 0));
var pixels = new Color32[tmpTexture.width * tmpTexture.height];
var index = 0;
for (var y = 0; y < tmpTexture.height; ++y)
{
for (var x = 0; x < tmpTexture.width; ++x)
{
var r = 1.0f - smoothnessColors.GetAt(x, y).a;
var m = metallicColors.GetAt(x, y).r;
pixels[index] = new Color(r, m, 0, 1);
++index;
}
}
tmpTexture.SetPixels32(pixels, 0);
var bytes = tmpTexture.EncodeToPNG();
fileStream.Write(bytes, 0, bytes.Length);
}
}
}