// Helper for ConvertGltf{1,2}Material
private UnityMaterial CreateNewPbrMaterial(
Material baseMaterial, Gltf2Material.PbrMetallicRoughness pbr)
{
Material mat = UnityEngine.Object.Instantiate(baseMaterial);
string matName = baseMaterial.name;
if (matName.StartsWith("Base"))
{
matName = matName.Substring(4);
}
mat.SetColor("_BaseColorFactor", pbr.baseColorFactor);
Texture tex = null;
if (pbr.baseColorTexture != null)
{
tex = pbr.baseColorTexture.texture.unityTexture;
mat.SetTexture("_BaseColorTex", tex);
}
if (tex != null)
{
matName = string.Format("{0}_{1}", matName, tex.name);
}
mat.SetFloat("_MetallicFactor", pbr.metallicFactor);
mat.SetFloat("_RoughnessFactor", pbr.roughnessFactor);
mat.name = matName;
return(new UnityMaterial {
material = mat, template = baseMaterial
});
}
// Helper for ConvertGltf{1,2}Material
private UnityMaterial CreateNewPbrMaterial(
Material baseMaterial, Gltf2Material.PbrMetallicRoughness pbr)
{
Material mat = UnityEngine.Object.Instantiate(baseMaterial);
string matName = baseMaterial.name;
if (matName.StartsWith("Base"))
{
matName = matName.Substring(4);
}
mat.SetColor("_BaseColorFactor", pbr.baseColorFactor);
mat.SetColor("_Color", pbr.baseColorFactor); //dook hack to get other shaders to work with color (not sure why they arn't using _color for their shader anyway?)
Texture tex = null;
if (pbr.baseColorTexture != null)
{
tex = pbr.baseColorTexture.texture.unityTexture;
mat.SetTexture("_BaseColorTex", tex);
mat.SetTexture("_MainTex", tex);
}
if (tex != null)
{
matName = string.Format("{0}_{1}", matName, tex.name);
}
mat.SetFloat("_MetallicFactor", pbr.metallicFactor);
mat.SetFloat("_RoughnessFactor", pbr.roughnessFactor);
mat.name = matName;
return(new UnityMaterial {
material = mat, template = baseMaterial
});
}
/// <summary>
/// Converts the given glTF1 material to a new Unity material.
/// This is only possible if the passed material is a Tilt Brush "PBR" material
/// squeezed into glTF1.
/// </summary>
/// <param name="gltfMat">The glTF1 material to convert.</param>
/// <returns>The result of the conversion, or null on failure.</returns>
private UnityMaterial?ConvertGltf1Material(Gltf1Material gltfMat)
{
Guid instanceGuid = ParseGuidFromMaterial(gltfMat);
Guid templateGuid = ParseGuidFromShader(gltfMat);
BrushDescriptor desc;
if (!PtSettings.Instance.brushManifest.BrushesByGuid.TryGetValue(templateGuid, out desc))
{
// If they are the same, there is no template/instance relationship.
if (instanceGuid != templateGuid)
{
Debug.LogErrorFormat("Unexpected: cannot find template material {0} for {1}",
templateGuid, instanceGuid);
}
return(null);
}
TiltBrushGltf1PbrValues tbPbr = gltfMat.values;
// The default values here are reasonable fallbacks if there is no tbPbr
Gltf2Material.PbrMetallicRoughness pbr = new Gltf2Material.PbrMetallicRoughness();
if (tbPbr != null)
{
if (tbPbr.BaseColorFactor != null)
{
pbr.baseColorFactor = tbPbr.BaseColorFactor.Value;
}
if (tbPbr.MetallicFactor != null)
{
pbr.metallicFactor = tbPbr.MetallicFactor.Value;
}
if (tbPbr.RoughnessFactor != null)
{
pbr.roughnessFactor = tbPbr.RoughnessFactor.Value;
}
if (tbPbr.BaseColorTexPtr != null)
{
pbr.baseColorTexture = new Gltf2Material.TextureInfo {
index = -1,
texCoord = 0,
texture = tbPbr.BaseColorTexPtr
};
}
// Tilt Brush doesn't support metallicRoughnessTexture (yet?)
}
return(CreateNewPbrMaterial(desc.Material, pbr));
}
