Rearrange soucre files into subdirectories

[libs/gl.git] / source / render / objectinstance.h

diff --git a/source/render/objectinstance.h b/source/render/objectinstance.h
new file mode 100644 (file)
index 0000000..0ebef2f
--- /dev/null
+++ b/source/render/objectinstance.h
@@ -0,0 +1,59 @@
+#ifndef MSP_GL_OBJETCINSTANCE_H_
+#define MSP_GL_OBJETCINSTANCE_H_
+
+#include <string>
+#include "object.h"
+#include "placeable.h"
+
+namespace Msp {
+namespace GL {
+
+/**
+Represents a single instance of an Object.  Thanks to being derived from
+Placeable in can be positioned without additional effort.  Other instance
+parameters can be set by overriding the hook functions.
+
+ObjectInstances can benefit from being put in an InstanceScene, which will
+render all instances of the same object consecutively.
+*/
+class ObjectInstance: public PlacedRenderable
+{
+public:
+       class Loader: public DataFile::ObjectLoader<ObjectInstance>
+       {
+       public:
+               Loader(ObjectInstance &);
+
+       private:
+               void transform();
+       };
+
+protected:
+       const Object &object;
+
+public:
+       ObjectInstance(const Object &);
+
+       const Object &get_object() const { return object; }
+       virtual IntPtr get_instance_key() const { return reinterpret_cast<IntPtr>(&object); }
+
+       virtual const Geometry::BoundingSphere<float, 3> *get_bounding_sphere() const { return object.get_bounding_sphere(); }
+
+       virtual void render(Renderer &, const Tag & = Tag()) const;
+
+       /** Hook function, called from Object just before rendering the mesh.
+       Renderer state will have been pushed before this is called. */
+       virtual void setup_render(Renderer &, const Tag &) const;
+
+       /** Hook function, called from Object right after rendering the mesh.  Since
+       Object takes care of pushing Renderer state, this rarely needs to do
+       anything. */
+       virtual void finish_render(Renderer &, const Tag &) const { }
+
+       virtual unsigned get_level_of_detail(const Renderer &) const;
+};
+
+} // namespace GL
+} // namespaec Msp
+
+#endif