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/*�Copyright 2009-2013 DIVIDE-Studio�*/
/* This file is part of DIVIDE Framework.

   DIVIDE Framework is free software: you can redistribute it and/or modify
   it under the terms of the GNU Lesser General Public License as published by
   the Free Software Foundation, either version 3 of the License, or
   (at your option) any later version.

   DIVIDE Framework is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public License
   along with DIVIDE Framework.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef _FRAME_LISTENER_H_
#define _FRAME_LISTENER_H_
#include "core.h"

///As you might of guessed it, it's the same system used in Ogre3D (http://www.ogre3d.org/docs/api/html/OgreFrameListener_8h_source.html)
///I'm sorry for using it, but it's so simple to implement, I decided to use something that people already know and are comfortable with
///-Ionut
struct FrameEvent{
  F32 _timeSinceLastEvent;
  F32 _timeSinceLastFrame;
  F32 _currentTime;
};
/// FrameListener class.
///Has 3 events, associated with the start of rendering a frame, the end of rendering and the end of buffer swapping after frames
///All events have timers associated with them for update timing
class FrameListener{
public:
	///Either give it a name
	FrameListener(const std::string& name){_listenerName = name;}
	///Or the frame listenr manager will assing it an ID
	FrameListener() {}
	virtual ~FrameListener(){}
	inline const std::string& getName() {return _listenerName;}

protected:
	friend class FrameListenerManager;
	inline void  setName(const std::string& name) {_listenerName = name;}
	///Adapter patern instead of pure interface for the same reason as the Ogre boys pointed out:
	///Implement what you need without filling classes with dummy functions
	///frameStarted is calld at the beggining of a new frame before processing the logic aspect of a scene
	virtual bool frameStarted(const FrameEvent& evt) {return true;}
	///framePreRenderStarted is called when we need to start processing the visual aspect of a scene
	virtual bool framePreRenderStarted(const FrameEvent& evt) {return true;}
	///framePreRenderEnded is called after all the prerendering has finished and rendering should start
	virtual bool framePreRenderEnded(const FrameEvent& evt) {return true;}
	///frameRendering Queued is called after all the frame setup/rendering but before the call to SwapBuffers
	virtual bool frameRenderingQueued(const FrameEvent& evt) {return true;}
	///frameEnded is called after the buffers have been swapped
	virtual bool frameEnded(const FrameEvent& evt) {return true;}

private:
	///not _name so that it doesn't conflict with Resource base class
	std::string _listenerName;
};
#endif

Commits for Divide-Framework/trunk/Source Code/Rendering/Headers/FrameListener.h

Diff revisions: vs.
Revision Author Commited Message
168 Diff Diff k1ngp1n picture k1ngp1n Sat 26 Oct, 2013 19:03:21 +0000

- Reworked the Camera class[[BR]]
— Now fully quaternion based [[BR]]
— Basic camera types added but not used yet (third person, first person, orbit) [[BR]]
- Cleaned up Material and Texture handling [[BR]]
- Added clipping plane support [[BR]]
— Similar to OpenGL fixed-function clip planes but fully shader driven [[BR]]
— Added a new class, “Plane”, that helps define clip planes [[BR]]
- Optimized the Singleton class to allow faster “getInstance” calls without performance penalties [[BR]]
-- “createInstance” must be called for each singleton class before usage. Or “gerOrCreateInstance” can be used, which is basically the former “getInstance” implementation [[BR]]
- Improved console logging by changing some heap allocations to stack and removing dependencies on the std::string class [[BR]]
- Added a lot of performance optimizations related to coding standards and redundant calculations [[BR]]
— e.g. Frustum AABB check didn’t need to recompute the AABB points as they were calculated already [[BR]]
— e.g. A vector did not need to be set to 0 on initialization as that is already it’s default state on creation [[BR]]
— e.g. Faster Framerate and Timing calculations by using less member variables that are not needed outsied of calling functions [[BR]]
- The SceneState now contains the SceneRenderState and is passed on to the SceneGraph’s update calls [[BR]]
- Better material export/import to/from XML format [[BR]]
- More bug fixes and cleanups [[BR]]

163 Diff Diff k1ngp1n picture k1ngp1n Thu 18 Jul, 2013 12:24:26 +0000

[Ionut] [[BR]]
- Fixed a rendering bug with the previous terrain rendering system (number of strips was not calculated correctly. had to add the primitive restart indices to the list as well) [[BR]]
- Fixed a rendering bug with the previous double sided Quad3D patch (water planes should not be double sided. The first parameter of the bool mask of the resource descriptor for water planes now controls whether the Quad will be single or double sided) [[BR]]
- NavMesh debug draw now uses a caching system for rendering instead of re-submitting the same geometry every frame [[BR]]
— Fixed a bug that prevented GLIM primitives to be cached if they had “canZombify” set to false [[BR]]
- Navigation meshes are now saved and loaded from file on creation. Delete the “nm” file from the navMeshes subfolder to recreate a navigation mesh for a scene. [[BR]]
- LightManager is now a FrameListener. ShadowMap generation is called with the “FramePreRenderEnd” event [[BR]]
- Terrain NavMesh uses the lowest LoD possible for now to improve creation times until all bugs are resolved [[BR]]
- Geometry importer now uses the “replace” operation for the base texture of objects [[BR]]
- glUniformBufferObjects are now a little less dependent on the GLM library [[BR]]
- Primitive restart is now toggled on or off at each VAO draw call [[BR]]
- Some GFXDevice inlining [[BR]]

141 Diff Diff k1ngp1n picture k1ngp1n Wed 30 Jan, 2013 19:35:31 +0000

[Ionut] [[BR]]
-Updated to boost 1.52 and CEGUI 0.7.9 [[BR]]
-Updated to PhysX 3.2 [[BR]]
-Updated copyright notices [[BR]]

114 Diff Diff k1ngp1n picture k1ngp1n Sat 02 Jun, 2012 13:03:01 +0000

[Ionut][[BR]]
-First steps in moving away from a generalized “ResourceManager”: [[BR]]
--Added templated resource loaders (Core\Resources\ConcreteLoaders). Just add a new loader for a new resource type and it’s ready for use [[BR]]
---Next step involves moving loading responsibility from the resource itself to the resource loader that handles it’s creation [[BR]]
--Renamed the ResourceManager to ResourceCache and limited it’s responsibility from general resource operations to a more standard abstract template factory with cache [[BR]]
---Manager base class is renamed to BaseCache as it’s a wrapper for a cache map in essence [[BR]]
---Next step involves adding a ResourceCache per scene (dropping Singleton status) with the possibility of sharing resources between them (to avoid reloading existing resources for a new scene) [[BR]]
-Translated AITenisScene and PingPongScene source code to english [[BR]]

103 Diff Diff k1ngp1n picture k1ngp1n Mon 12 Mar, 2012 19:06:00 +0000

[Ionut] [[BR]]
Features: [[BR]]
-Added a proper RenderState Management system similar to the D3D default one[[BR]]
--All possible states are managed: cull, blend, alpha-blend, color mask, lighting, stencil mask, fill mode etc [[BR]]
--Every material has different states for normal rendering, shadow rendering and reflection rendering [[BR]]
--Nodes are sorted by shader first then by state hash depending on current render stage [[BR]]
--Redundant states are not changed [[BR]]
--Every entity submits it’s desired state before render [[BR]]
--Every state is checked before rendering a VBO or other primitive type[[BR]]
[[BR]]
-Added a Reflector base class used for reflection calculations and updates (useful for water, mirrors, portals etc)[[BR]]
--Reflections are triggered between pre-render and render calls [[BR]]
--Water now derives from Reflector class as well [[BR]]
[[BR]]
-Material now properly calculates if it has transparency or is double sided, setting desired states to handle this feature (cull, blend) [[BR]]
-Added some basic defines or inline template functions to facilitate access to useful classes and methods (hardware devices, resource management, console printing, etc) [[BR]]
-Lights are updated after every camera update[[BR]]
-Added a new FrameListener event triggered after pre-render call is finished (used by reflectors) [[BR]]
-Added a CRC class to compute unique hash values for entities[[BR]]
-Added D3D dummy files [[BR]]
-Removed executables from subversion [[BR]]
Performance: [[BR]]
-Image loading has been improved a bit [[BR]]
-Terrain texel density now varies with LOD level [[BR]]
-Light API specific calls,except position, are set only if values changed[[BR]]
-Specific GUI casting and rendering are the Rendering API’s job now, not the GUI class [[BR]]
-Rendering Queue processing is now more efficient in sorting valid visible nodes and setting appropriate states/materials
[[BR]]
Bug fixes: [[BR]]
-Better drawState checks[[BR]]
-Proper light effects in deferred rendering[[BR]]
-Light dummy now renders properly[[BR]]
-Reworked bounding box computation [[BR]]
[[BR]]
Known bugs: [[BR]]
-Terrain infinite plain still not visible [[BR]]
-Some z-fighting occurs when looking at certain objects from a distance. (looking at another object and back again fixes it) [[BR]]

101 Diff Diff k1ngp1n picture k1ngp1n Wed 07 Mar, 2012 13:56:56 +0000

[Ionut] [[BR]]
-Added GLSL effect-like file support using GLSW [http://prideout.net/blog/?p=11] [[BR]]
-Added GLSL “#include” support. Now shader functions can be define in separate frag/vert files as atoms and included in the glsl effect file [[BR]]
-Added more DoxyGen-comments[[BR]]

100 k1ngp1n picture k1ngp1n Mon 05 Mar, 2012 17:45:11 +0000

[Ionut] [[BR]]
Features: [[BR]]
-Added a physics system interface instead of direct PhysX interaction to allow other physics engines (Bullet, ODE etc) to be easily implemented [[BR]]
--This will aid in Object-Object collisions and character control in future revisions [[BR]]
-Added an Ogre3D inspired FrameListener which now allows Before-frame/during-frame/after-frame event plugins of callbacks [[BR]]
-Added a renderInViewport system to draw elements in a user defined rectangle on screen [[BR]]
--Current uses: shadowmap preview (F10) [[BR]]
-Separated Shaders from ShaderPrograms[[BR]]
--ShaderPrograms can now use multiple Shaders [[BR]]
-Error output is now sent to errors.log[[BR]]
-All SceneNode based elements now have a postDraw calls as well [[BR]]
-A cubemap generating function has been added to the GFXDevice class[[BR]]
-Added debug only print options to the Console class [[BR]]
[[BR]]
Performance: [[BR]]
-All shadows are now filtered by a faster Gaussian 3x3 blur filter [[BR]]
-All renderables are now sorted and rendered by material/front-to-back/back-to-front, depending on case [[BR]]
-RenderQueue now sorts and queue’s translucent and opaque objects separately[[BR]]
-Shader uniforms/attributes are now cached to reduce number of address calls to the GPU[[BR]]
-Shaders are now cached, so that if multiple ShaderPrograms use an already compiled Shader, that Shader is returned from memory instead of creating a new copy[[BR]]
-Shaders are not unbound/rebound except when an objects demands so (vastly improves performance)[[BR]]
-Reduced calls to glEnable[[BR]]
[[BR]]
Bug fixes: [[BR]]
-Preprocessor configurations now work properly [[BR]]
-Video API is now unloaded before destruction [[BR]]
-Manager base class now properly frees memory [[BR]]
-Materials are saved to XML only if they are changed at any point [[BR]]