Add base support for 2D meshes in Godot, including Sprite -> Mesh2D conversion.

scene/2d/mesh_instance_2d.h

@@ -0,0 +1,33 @@
+#ifndef MESH_INSTANCE_2D_H
+#define MESH_INSTANCE_2D_H
+
+#include "scene/2d/node_2d.h"
+
+class MeshInstance2D : public Node2D {
+	GDCLASS(MeshInstance2D, Node2D)
+
+	Ref<Mesh> mesh;
+
+	Ref<Texture> texture;
+	Ref<Texture> normal_map;
+
+protected:
+	void _notification(int p_what);
+	static void _bind_methods();
+
+public:
+	void set_mesh(const Ref<Mesh> &p_mesh);
+	Ref<Mesh> get_mesh() const;
+
+	void set_texture(const Ref<Texture> &p_texture);
+	Ref<Texture> get_texture() const;
+
+	void set_normal_map(const Ref<Texture> &p_texture);
+	Ref<Texture> get_normal_map() const;
+
+	virtual Rect2 _edit_get_rect() const;
+
+	MeshInstance2D();
+};
+
+#endif // MESH_INSTANCE_2D_H