1. Game Design and Dev Ogre3D Overview
CSE 786
Prof. Roger Crawfis

2. Ogre 3D Base web site: www.ogre3d.org Download and install Notes Wiki
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 Some Design Patterns used
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

8. Core Objects
-The 'Root' object is the entry point to the OGRE system. This object MUST be the first one to be created, and the last one to be destroyed.
-(ST_GENERIC, ST_INTERIOR , BSP_MANAGER)The intention is that specialisations will be created for each type of scene such that under the surface the subclass will optimise the scene organisation for best performance given assumptions which can be made for that scene type. An example is the BspSceneManager which optimises rendering for large indoor levels based on a Binary Space Partition (BSP) tree.
-An entity is an instance of a movable object in the scene.
-The Material object controls how objects in the scene are rendered. It specifies what basic surface properties objects have such as reflectance of colours, shininess etc, how many texture layers are present, what images are on them and how they are blended together, what special effects are applied such as environment mapping, what culling mode is used, how the textures are filtered etc.
-Overlays allow you to render 2D and 3D elements on top of the normal scene contents to create effects like heads-up displays (HUDs), menu systems, status panels etc.

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

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

11. Terrain, sky, fog
Demo_Terrain
Media\Terrain.cfg

12. 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);
Demo_Gui
Can show Buffered input: OIS::KeyListener, OIS::MouseListener

13. 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);
-Softimage XSI, Milkshape 3D, Blender, 3D Studio or Maya exporters
Shadow_deneme
Demo_SkeletalAnimation => CEGUI_MeshViewer
-Morph animation works by storing snapshots of the absolute vertex positions in each keyframe, and interpolating between them.
-Pose animation is about blending multiple discrete poses, expressed as offsets to the base vertex data, with different weights to provide a final result.

14. Animation Crowd (instancing vs single entity) Facial animation
InstancedGeometry* batch =
new InstancedGeometry(mCamera->getSceneManager(), "robots" );
batch->addEntity(ent, Vector3::ZERO);
batch->build();
Facial animation
VertexPoseKeyFrame* manualKeyFrame;
manualKeyFrame->addPoseReference();
manualKeyFrame->updatePoseReference ( ushort poseIndex, Real influence) 
Demo_Crowd
Demo_FacialAnimation

15. 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 }
3D desktop

16. 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
billboard_type oriented_self
// Area emitter
emitter Point {
angle
emission_rate 75
time_to_live 2
direction
velocity_min
velocity_max
colour_range_start
colour_range_end }
// Gravity
affector LinearForce
force_vector
force_application add
// Fader
affector ColourFader
red -0.5
green -0.5
blue -0.5
Demo_ParticleFX
Media/particle/Example.particle

17. Particle Effects Particle system attributes quota material
particle_width
particle_height
cull_each
billboard_type
billboard_origin
billboard_rotation_type
common_direction
common_up_vector
renderer
sorted
local_space
point_rendering
accurate_facing
iteration_interval
nonvisible_update_timeout
Emitter attributes
(point, box, clyinder, ellipsoid, hollow ellipsoid, ring)
angle
colour
colour_range_start
colour_range_end
direction
emission_rate
position
velocity
velocity_min
velocity_max
time_to_live
time_to_live_min
time_to_live_max
duration
duration_min
duration_max
repeat_delay
repeat_delay_min
repeat_delay_max
Affectors (LinearForce, ColorFader)
Linear Force Affector
ColourFader Affector
ColourFader2 Affector
Scaler Affector
Rotator Affector
ColourInterpolator Affector
ColourImage Affector
DeflectorPlane Affector
DirectionRandomiser Affector

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