// Exports all non-experimental brushes along with their material parameters
// into a directory structure suitable for submission to
// google3/googledata/html/external_content/tiltbrush.com/shaders/brushes
//
// Input:
// Non-experimental brushes (from Assets/Manifest.asset)
// Their materials and shaders
//
// Output:
// An ExportManifest, writen to manifestPath
// An ExportRequests instance
//
// The manifest is consumed by Tilt Brush at export time, and should not
// be uploaded to Poly or be served by it.
//
// The ExportRequests is processed by a texture downsampler; see DownsampleTextures()
//
// Shaders are not generated here; see GenerateShaders()
//
private static ExportRequests WriteManifest(
string manifestPath, string exportRoot)
{
ExportRequests exportRequests = new ExportRequests();
Debug.LogFormat("Exporting to: {0}", manifestPath);
ExportGlTF.ExportManifest manifest = new ExportGlTF.ExportManifest();
Dictionary <Guid, BrushDescriptor> brushes;
using (var unused = new BuildTiltBrush.TempHookUpSingletons())
{
manifest.tiltBrushVersion = App.Config.m_VersionNumber;
manifest.tiltBrushBuildStamp = App.Config.m_BuildStamp;
brushes = GetBrushes();
}
foreach (KeyValuePair <Guid, BrushDescriptor> kvp in brushes)
{
try
{
BrushDescriptor descriptor = kvp.Value;
var exp = ExportBrush(exportRequests, descriptor, exportRoot);
manifest.brushes.Add(exp.guid, exp);
// While we're at it, maybe a sanity check of the descriptor is in order
if (descriptor.m_RenderBackfaces && !exp.enableCull)
{
Debug.LogWarning(
$"{descriptor.m_DurableName}: generates backface geometry, but disables culling",
descriptor);
}
}
catch (ExportException e)
{
Debug.LogException(e);
} // foreach Brush + try
}
var serializer = new JsonSerializer();
serializer.ContractResolver = new CustomJsonContractResolver();
using (var writer = new CustomJsonWriter(new StreamWriter(manifestPath)))
{
writer.Formatting = Formatting.Indented;
serializer.Serialize(writer, manifest);
}
return(exportRequests);
}
// Input: the exportRequests
// Output: downsampled textures, to subdirectories of exportRoot
private static void ExportTextures(ExportRequests exportRequests)
{
string projectPath = Path.GetDirectoryName(Application.dataPath);
string requestsJson = Path.Combine(projectPath, "Temp/ExportRequests.json");
var serializer = new JsonSerializer();
serializer.ContractResolver = new CustomJsonContractResolver();
using (var writer = new CustomJsonWriter(new StreamWriter(requestsJson))) {
writer.Formatting = Formatting.Indented;
serializer.Serialize(writer, exportRequests);
}
string scriptPath = Path.Combine(projectPath, "Support/bin/gltf_export_textures.py");
RunCommand("python", scriptPath, requestsJson);
}