pch migration to modules [wip]

vr/vr_interface.cppm

@@ -0,0 +1,49 @@
+module;
+#include <memory>
+#include <string>
+#include <unordered_map>
+#include <vector>
+
+export module eu07.vr.vr_interface;
+import eu07.glm;
+import eu07.vehicle.camera;
+import eu07.simcore;
+import eu07.model.texture;
+
+export {
+
+class vr_interface
+{
+public:
+    enum eye_e {
+        eye_left,
+        eye_right
+    };
+
+    virtual viewport_proj_config get_proj_config(eye_e) = 0;
+    virtual TModel3d* get_hiddenarea_mesh(eye_e) = 0;
+    virtual glm::ivec2 get_target_size() = 0;
+    virtual void begin_frame() = 0;
+    virtual void submit(eye_e, opengl_texture*) = 0;
+    virtual std::vector<TModel3d*> get_render_models() = 0;
+    virtual glm::mat4 get_pick_transform() = 0;
+    virtual void finish_frame() = 0;
+    virtual ~vr_interface() = 0;
+};
+
+class vr_interface_factory
+{
+public:
+    using create_method = std::unique_ptr<vr_interface>(*)();
+
+    bool register_backend(const std::string &backend, create_method func);
+    std::unique_ptr<vr_interface> create(const std::string &name);
+
+    static vr_interface_factory* get_instance();
+
+private:
+    std::unordered_map<std::string, create_method> backends;
+    static vr_interface_factory *instance;
+};
+
+}  // export