From 29ce7770c3e8373d2efea0b47fe50a13a81e75a2 Mon Sep 17 00:00:00 2001
From: Dan Goodliffe <dan@randomdan.homeip.net>
Date: Sat, 4 Mar 2023 14:17:00 +0000
Subject: Add Asset helpers to construct OpenGL ready meshes from Asset Factory
 meshes during load

---
 assetFactory/asset.cpp | 29 ++++++++++++++++++++++++++++-
 assetFactory/asset.h   | 22 ++++++++++++++++++++++
 2 files changed, 50 insertions(+), 1 deletion(-)

diff --git a/assetFactory/asset.cpp b/assetFactory/asset.cpp
index fa30a78..659a950 100644
--- a/assetFactory/asset.cpp
+++ b/assetFactory/asset.cpp
@@ -3,6 +3,33 @@
 bool
 Asset::persist(Persistence::PersistenceStore & store)
 {
-	return STORE_TYPE && STORE_MEMBER(id) && STORE_MEMBER(name)
+	return STORE_MEMBER(id) && STORE_MEMBER(name)
 			&& STORE_NAME_HELPER("mesh", meshes, Persistence::Appender<FactoryMesh::Collection>);
 }
+
+Asset::MeshConstruct::MeshConstruct(Mesh::Ptr & m) :
+	Persistence::SelectionPtrBase<FactoryMesh::Ptr> {fmesh}, out {m} { }
+
+void
+Asset::MeshConstruct::endObject(Persistence::Stack & stk)
+{
+	out = fmesh->createMesh();
+	Persistence::SelectionPtrBase<FactoryMesh::Ptr>::endObject(stk);
+}
+
+Asset::MeshArrayConstruct::MeshArrayConstruct(std::span<Mesh::Ptr> m) :
+	Persistence::SelectionPtrBase<FactoryMesh::Ptr> {fmesh}, out {m}
+{
+}
+
+void
+Asset::MeshArrayConstruct::endObject(Persistence::Stack & stk)
+{
+	for (auto & outMesh : out) {
+		if (!outMesh) {
+			outMesh = fmesh->createMesh();
+			break;
+		}
+	}
+	Persistence::SelectionPtrBase<FactoryMesh::Ptr>::endObject(stk);
+}
diff --git a/assetFactory/asset.h b/assetFactory/asset.h
index d86b804..8dd1ecb 100644
--- a/assetFactory/asset.h
+++ b/assetFactory/asset.h
@@ -12,6 +12,28 @@ public:
 	FactoryMesh::Collection meshes;
 
 protected:
+	struct MeshConstruct : public Persistence::SelectionPtrBase<FactoryMesh::Ptr> {
+		using Persistence::SelectionPtrBase<FactoryMesh::Ptr>::setValue;
+
+		MeshConstruct(Mesh::Ptr & m);
+
+		void endObject(Persistence::Stack & stk) override;
+
+		FactoryMesh::Ptr fmesh;
+		Mesh::Ptr & out;
+	};
+
+	struct MeshArrayConstruct : public Persistence::SelectionPtrBase<FactoryMesh::Ptr> {
+		using Persistence::SelectionPtrBase<FactoryMesh::Ptr>::setValue;
+
+		MeshArrayConstruct(std::span<Mesh::Ptr> m);
+
+		void endObject(Persistence::Stack & stk) override;
+
+		FactoryMesh::Ptr fmesh;
+		std::span<Mesh::Ptr> out;
+	};
+
 	friend Persistence::SelectionPtrBase<std::shared_ptr<Asset>>;
 	bool persist(Persistence::PersistenceStore & store) override;
 };
-- 
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