paint: improve meshes tab

paint/sources/io/export_arm.c

@@ -259,6 +259,12 @@ void export_arm_run_project() {
 	}
 	g_project->mesh_transforms = mesh_transforms;
 
+	i32_array_t *mesh_materials = i32_array_create(g_project->_->paint_objects->length);
+	for (i32 i = 0; i < g_project->_->paint_objects->length; ++i) {
+		mesh_materials->buffer[i] = tab_meshes_get_override(g_project->_->paint_objects->buffer[i]);
+	}
+	g_project->mesh_materials = mesh_materials;
+
 	g_project->material_nodes = mnodes;
 	g_project->brush_nodes    = bnodes;
 	g_project->layer_datas    = ld;

paint/sources/io/import_arm.c

@@ -600,6 +600,15 @@ void import_arm_run_project(char *path) {
 		}
 	}
 
+	if (project->mesh_materials != NULL) {
+		for (i32 i = 0; i < g_project->_->paint_objects->length && i < project->mesh_materials->length; ++i) {
+			i32 mat_index = project->mesh_materials->buffer[i];
+			if (mat_index >= 0) {
+				tab_meshes_set_override(g_project->_->paint_objects->buffer[i], mat_index);
+			}
+		}
+	}
+
 	tab_timeline_import(project);
 
 	sys_notify_on_next_frame(&import_arm_run_project_on_next_frame, NULL);

paint/sources/io/import_legacy.c

@@ -230,6 +230,7 @@ project_t *import_arm_from_map_to_arm(any_map_t *old) {
 	project->mesh_assets         = any_map_get(old, "mesh_assets");
 	project->mesh_icons          = any_map_get(old, "mesh_icons");
 	project->mesh_transforms     = any_map_get(old, "mesh_transforms");
+	project->mesh_materials      = any_map_get(old, "mesh_materials");
 	project->atlas_objects       = any_map_get(old, "atlas_objects");
 	project->atlas_names         = any_map_get(old, "atlas_names");
 	project->script_datas        = any_map_get(old, "script_datas");
@@ -288,6 +289,7 @@ project_t *import_arm_from_map_to_arm(any_map_t *old) {
 }
 
 project_t *import_arm_from_version_8(any_map_t *old) {
+	any_map_set(old, "mesh_materials", NULL);
 	any_map_set(old, "script_names", NULL);
 	any_map_set(old, "stages", NULL);
 	return import_arm_from_map_to_arm(old);