// 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
});
}
/// <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)
{
// We know this guid doesn't map to a brush; if it did, LookupGlobalMaterial would
// have succeeded and we wouldn't be trying to create an new material.
Guid instanceGuid = ParseGuidFromMaterial(gltfMat);
Guid templateGuid = ParseGuidFromShader(gltfMat);
BrushDescriptor desc;
if (!TbtSettings.Instance.TryGetBrush(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?)
}
var pbrInfo = new TbtSettings.PbrMaterialInfo {
#if TILT_BRUSH
descriptor = desc,
#endif
material = desc.Material
};
return(CreateNewPbrMaterial(pbrInfo, gltfMat.name, pbr));
}
/// <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 (!TiltBrushToolkit.TbtSettings.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));
}
// Helper for ConvertGltf{1,2}Material
private UnityMaterial CreateNewPbrMaterial(
TbtSettings.PbrMaterialInfo pbrInfo, string gltfMatName,
Gltf2Material.PbrMetallicRoughness pbr)
{
Material mat = UnityEngine.Object.Instantiate(pbrInfo.material);
Texture tex = null;
if (pbr.baseColorTexture != null)
{
tex = pbr.baseColorTexture.texture.unityTexture;
mat.SetTexture("_BaseColorTex", tex);
}
if (gltfMatName != null)
{
// The gltf has a name it wants us to use
mat.name = gltfMatName;
}
else
{
// No name in the gltf; make up something reasonable
string matName = pbrInfo.material.name;
if (matName.StartsWith("Base"))
{
matName = matName.Substring(4);
}
if (tex != null)
{
matName = string.Format("{0}_{1}", matName, tex.name);
}
mat.name = matName;
}
mat.SetColor("_BaseColorFactor", pbr.baseColorFactor);
mat.SetFloat("_MetallicFactor", pbr.metallicFactor);
mat.SetFloat("_RoughnessFactor", pbr.roughnessFactor);
return(new UnityMaterial {
material = mat,
#if TILT_BRUSH
exportableMaterial = pbrInfo.descriptor,
#endif
template = pbrInfo.material
});
}
