Refactored Mesh internals and formats.

-Changed how mesh data is organized, hoping to make it more efficient on Vulkan and GLES.
-Removed compression, it now always uses the most efficient format.
-Added support for custom arrays (up to 8 custom formats)
-Added support for 8 weights in skeleton data.
-Added a simple optional versioning system for imported assets, to reimport if binary is newer
-Fixes #43979 (I needed to test)

WARNING:

-NOT backwards compatible with previous 4.x-devel, will most likely never be, but it will force reimport scenes due to version change.
-NOT backwards compatible with 3.x scenes, this will be eventually re-added.
-Skeletons not working any longer, will fix in next PR.

1 files changed, 16 insertions, 0 deletions

diff --git a/editor/editor_file_system.cpp b/editor/editor_file_system.cpp
index 6dcc505a11..738b88a86b 100644
--- a/editor/editor_file_system.cpp
+++ b/editor/editor_file_system.cpp
@@ -357,10 +357,12 @@ bool EditorFileSystem::_test_for_reimport(const String &p_path, bool p_only_impo
 
 	List<String> to_check;
 
+	String importer_name;
 	String source_file = "";
 	String source_md5 = "";
 	Vector<String> dest_files;
 	String dest_md5 = "";
+	int version = 0;
 
 	while (true) {
 		assign = Variant();
@@ -384,6 +386,10 @@ bool EditorFileSystem::_test_for_reimport(const String &p_path, bool p_only_impo
 				for (int i = 0; i < fa.size(); i++) {
 					to_check.push_back(fa[i]);
 				}
+			} else if (assign == "importer_version") {
+				version = value;
+			} else if (assign == "importer") {
+				importer_name = value;
 			} else if (!p_only_imported_files) {
 				if (assign == "source_file") {
 					source_file = value;
@@ -399,6 +405,12 @@ bool EditorFileSystem::_test_for_reimport(const String &p_path, bool p_only_impo
 
 	memdelete(f);
 
+	Ref<ResourceImporter> importer = ResourceFormatImporter::get_singleton()->get_importer_by_name(importer_name);
+
+	if (importer->get_format_version() > version) {
+		return true; // version changed, reimport
+	}
+
 	// Read the md5's from a separate file (so the import parameters aren't dependent on the file version
 	String base_path = ResourceFormatImporter::get_singleton()->get_import_base_path(p_path);
 	FileAccess *md5s = FileAccess::open(base_path + ".md5", FileAccess::READ, &err);
@@ -1576,6 +1588,10 @@ Error EditorFileSystem::_reimport_group(const String &p_group_file, const Vector
 		f->store_line("[remap]");
 		f->store_line("");
 		f->store_line("importer=\"" + importer->get_importer_name() + "\"");
+		int version = importer->get_format_version();
+		if (version > 0) {
+			f->store_line("importer_version=" + itos(importer->get_format_version()));
+		}
 		if (importer->get_resource_type() != "") {
 			f->store_line("type=\"" + importer->get_resource_type() + "\"");
 		}