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Game Design and Dev Ogre3D Overview

Game Design and Dev Ogre3D Overview. CSE 786 Prof. Roger Crawfis. Ogre 3D. Base web site: www.ogre3d.org Download and install Notes The SDK just seems to unpack the files where they were, so move to you development area (Programming/SDKs?) The Environment variable (OGRE_HOME) was not set.

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Game Design and Dev Ogre3D Overview

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  1. Game Design and DevOgre3D Overview CSE 786 Prof. Roger Crawfis

  2. Ogre 3D • Base web site: www.ogre3d.org • Download and install Notes • The SDK just seems to unpack the files where they were, so move to you development area (Programming/SDKs?) • The Environment variable (OGRE_HOME) was not set. • Use this in you Project settings. • Includes Boost and OIS. Does not include CEGUI. • OIS name conflicts with Ogre (Vector3), so never have a: using namespace OIS; • Wiki • Tutorials • API documentation • …

  3. What is Ogre3D? • Object-Oriented • A little old school and the code is getting bloated. • Not very well engineered now. • Some Design Patterns used • Singletons • Managers • Factory Methods

  4. What is Ogre3D? • Plug-In Architecture • Rendering System • Core Features • Enhancements • Dynamically loads dll’s at runtime. • Copy the ones you need over to your repository. • Default framework reads in a config file to determine which plug-ins to load. • Not automatic.

  5. Plug-In Framework • Default Plugins.cfg # Defines plugins to load # Define plugin folder PluginFolder=. # Define plugins Plugin=RenderSystem_Direct3D9_d Plugin=RenderSystem_GL_d Plugin=Plugin_ParticleFX_d Plugin=Plugin_BSPSceneManager_d Plugin=Plugin_CgProgramManager_d Plugin=Plugin_PCZSceneManager_d.dll Plugin=Plugin_OctreeZone_d.dll Plugin=Plugin_OctreeSceneManager_d

  6. Media Resources • Default Resources.cfg file: # Resource locations to be added to the 'boostrap' path # This also contains the minimum you need to use the Ogre example framework [Bootstrap] Zip=../../media/packs/OgreCore.zip # Resource locations to be added to the default path [General] FileSystem=../../media FileSystem=../../media/fonts FileSystem=../../media/materials/programs FileSystem=../../media/materials/scripts FileSystem=../../media/materials/textures FileSystem=../../media/models FileSystem=../../media/overlays FileSystem=../../media/particle FileSystem=../../media/gui FileSystem=../../media/DeferredShadingMedia FileSystem=../../media/PCZAppMedia Zip=../../media/packs/cubemap.zip Zip=../../media/packs/cubemapsJS.zip Zip=../../media/packs/dragon.zip Zip=../../media/packs/fresneldemo.zip Zip=../../media/packs/ogretestmap.zip Zip=../../media/packs/skybox.zip

  7. Core Objects

  8. Startup Sequence • ExampleApplication • Go() • Setup() • Configure() • setupResources() • chooseSceneManager() • createCamera() • createViewport() • createResourceListener() • loadResources() • createScene() • frameStarted/Ended() • createFrameListener() • destroyScene()

  9. Basic Scene • Entity, SceneNode • Camera, lights, shadows • BSP map • Integrated ODE physics • BSP map • Frame listeners

  10. Terrain, sky, fog

  11. CEGUI • Window, panel, scrollbar, listbox, button, static text • Media/gui/ogregui.layout CEGUI::Window* sheet = CEGUI::WindowManager::getSingleton().loadWindowLayout((CEGUI::utf8*)"ogregui.layout"); mGUISystem->setGUISheet(sheet);

  12. Animation • Node animation (camera, light sources) • Skeletal Animation AnimationState *mAnimationState; mAnimationState = ent->getAnimationState("Idle"); mAnimationState->setLoop(true); mAnimationState->setEnabled(true); mAnimationState->addTime(evt.timeSinceLastFrame); mNode->rotate(quat);

  13. Animation • Crowd (instancing vs single entity) InstancedGeometry* batch = new InstancedGeometry(mCamera->getSceneManager(), "robots" ); batch->addEntity(ent, Vector3::ZERO); batch->build(); • Facial animation VertexPoseKeyFrame* manualKeyFrame; manualKeyFrame->addPoseReference(); manualKeyFrame->updatePoseReference ( ushortposeIndex, Realinfluence) 

  14. Picking CEGUI::Point mousePos = CEGUI::MouseCursor::getSingleton().getPosition(); Ray mouseRay = mCamera->getCameraToViewportRay(mousePos.d_x/float(arg.state.width), mousePos.d_y/float(arg.state.height)); mRaySceneQuery->setRay(mouseRay); mRaySceneQuery->setSortByDistance(false); RaySceneQueryResult &result = mRaySceneQuery->execute(); RaySceneQueryResult::iterator mouseRayItr; Vector3 nodePos; for (mouseRayItr = result.begin(); mouseRayItr != result.end(); mouseRayItr++) { if (mouseRayItr->worldFragment) { nodePos = mouseRayItr->worldFragment->singleIntersection; break; } // if }

  15. Particle Effects mSceneMgr->getRootSceneNode()->createChildSceneNode()->attachObject( mSceneMgr->createParticleSystem("sil", "Examples/sil")); Examples/sil { material Examples/Flare2 particle_width 75 particle_height 100 cull_each false quota 1000 billboard_typeoriented_self // Area emitter emitter Point { angle 30 emission_rate 75 time_to_live 2 direction 0 1 0 velocity_min 250 velocity_max 300 colour_range_start 0 0 0 colour_range_end 1 1 1 } // Gravity affectorLinearForce { force_vector 0 -100 0 force_application add } // Fader affectorColourFader { red -0.5 green -0.5 blue -0.5 } }

  16. Particle Effects

  17. Fire and Smoke affector Rotator { rotation_range_start 0 rotation_range_end 360 rotation_speed_range_start -60 rotation_speed_range_end 200 }

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