add cpu-side submodel structure for ray testing

betterRenderer/renderer/source/rt_model.h

@@ -0,0 +1,24 @@
+#pragma once
+
+#include <glm/vec3.hpp>
+#include <memory>
+
+#include "nvrenderer/nvrenderer.h"
+
+class TSubModel;
+class TModel3d;
+
+namespace Rt {
+struct IRtModel {
+  virtual TSubModel const* Intersect(NvRenderer::Renderable const& renderable,
+                                     glm::dvec3 const& ro,
+                                     glm::dvec3 const& rd) const {
+    return nullptr;
+  }
+  virtual ~IRtModel() = default;
+};
+
+std::shared_ptr<IRtModel> CreateRtModel(TModel3d const* src,
+                                        NvRenderer const* owner);
+
+}  // namespace Rt