Game Engine

Description

A c++ data driven game engine consisting of various subsystems including graphics, physics and multi-threading.

How To Use

IMPORTANT Please install OpenAL with Audio/OpenAL 1.1 SDK/redist/oalinst.exe.

Level Editor and Developer's Console

Current Limitations

• Inputs are case sensitive.
• Captials must be used with the CapsLock button, shift is not implemented.
• Divide on numpad is used for a forward slash.

Commands

General Commands

1. Toggle free camera movement debugcamera

2. Create a game object

spawngameobject GameObjectName

• gameobjectname is the resource identifier.

3. Add a scene node to a game object

addscenenode GameObjectName MeshIdentifier colour=1,1,1,1

• adds a scene node to an existing game object.
• MeshIdentifier is the resource name of a mesh already loaded into the resource manager.
• colour must have 4 components.

4. Add a physics node to a game object

addphysicsnode GameObjectName shape=Box invMass=0.5 static=true

• shape is the collision shape of the physics node. It must be either 'Box' or 'Sphere'.
• static will dictate whether it is moveable or not. Static nodes will not collide with eachother. Must be either 'true' or 'false'.
• IMPORTANT. A SCALE MUST BE SET FOR A GAMEOBJECT BEFORE ADDING A PHYSICS NODE

5. Load a mesh into the resource manager

loadmesh NewMeshIdentifier mesh=.../Directory/Example/someMesh.obj loadmesh NewMeshIdentifier mesh=.../Directory/Example/someMesh.obj texture=../Directory/AnotherExample/someTexture.png

• NewMeshIdentifier is the meshes identifier to be used for adding it to a game object.
• A texture is optional.
• WARNING MAY BE SLOW DEPENDING ON SIZE OF THE MESH

6. Load a sound into the resource manager

loadsound NewSoundName sound=../Data/...

• NewSoundName is the sounds identifier to be used for scripting and playing.

7. Add a light to the scene

addlight NewLightName position=0,0,0 colour=1,1,1,1 radius=1 intensity=1 shadow=true

• radius and intensity can be any values.
• shadow dictates whether the light will cast a shadow on objects in the scene or not. Must be either 'true' or 'false'.

8. Save the level to file

savelevel LevelName

• writes all resources and current state of the game to XML files. Must ideally be used when the game is not being played.

9. Stop playing the level

quit

• stops level playback and resets to position of original save.
• ENSURE LEVEL IS SAVED BEFORE QUITTING

10. Start the level

start

11. Others

removelight lightName

removescenenode gameObjectName

removephysicsnode gameObjectName

Messages

1. Pausing/Resuming the game

text GameLoop deltatime disable text GameLoop deltatime enable

2. Moving a game object

`movegameobject SubsystemToDeliverTo GameObjectName position=0,0,0

• Will snap a game object to that position.
• If the game object has a scene node only, SubsystemToDeliverTo must be RenderingSystem.
• If the game object has a scene node and a physics node, SubsystemToDeliverTo must be Physics

3. Scaling a game object

`scalegameobject SubsystemToDeliverTo GameObjectName scale=0,0,0

• Will set the size of a game object to that scale.
• If the game object has a scene node only, SubsystemToDeliverTo must be RenderingSystem.
• If the game object has a scene node and a physics node, SubsystemToDeliverTo must be Physics

3. Rotate a game object

`rotategameobject SubsystemToDeliverTo GameObjectName rotate=0,0,0,0

• Will set the orientation of the gameobjec to that rotation.
• the first 3 components of rotate are the axes on which to rotate. The 4th compoinent is how many degrees to rotate by.
• For example, a rotation on the Y axis only by 45 degrees will be rotate=0,1,0,45.
• If the game object has a scene node only, SubsystemToDeliverTo must be RenderingSystem.
• If the game object has a scene node and a physics node, SubsystemToDeliverTo must be Physics