Assignment 5 CS 381: Game Engine Architecture

Assignment 5
CS 381: Game Engine Architecture
Max Score: 100
Assignment
You will build on top of the posted solution to assignment four and implement 1) left-mouseclick selection and 2) Flying entities. Use the posted solution to assignment four as the basis
for this assignment. Your mission:
• Use buffered input to implement left-mouse-click selection. As before, an axis aligned
bounding box should bound the selected entity.
• Add desiredAltitude and altitude variables and change the altitude towards the
desiredAltitude at climbRate in your physics aspect to implement movement along
the y-axis.
Architecture (10 points)
Understand and use the posted solution to assignment four and implement the two requirements by adding to this codebase.
Simple 3D Physics (20 points)
Just like speed, desiredSpeed, and acceleration, flying entities simply need to change
altitude to desiredAltitude according to a climbRate.
Controlling desired altitude (10 points)
Players control a selected flying entity’s desired altitude using the numeric PgUp and numeric
PgDn keys on your keyboard.
1
New flying entity mesh (10 points)
I have uploaded a new flying entity’s mesh and material to our model website. Only this
Banshee entity can fly. You will need to take, place, and use these files to implement your
flying entity. None of the other ship models or the alien vessel may leave the water surface.
Make sure to load at least one example of each of the five (5) different types of ship models
(entity types) at http://www.cse.unr.edu/~sushil/models/381/ into your evolving game
engine.
Camera control (5 points)
You will now control the camera with the WASD and E (up) and F (down) keys (get my
permission if you would like to use different keys).
Quitting
Hitting the escape key should shut down your running game engine.
Tab selection (5 points)
Continue to leave the tab key bound to selection - that is - pressing the tab key will select
the ”next” entity. Only selected entities have visible axis aligned bounding boxes. So now,
once you implement mouse selection, we will have two ways of selecting entities. Both can
and should work together. Once you select an entity with a mouse left click, you should be
able to select the “next” entity by pressing the tab button.
Mouse selection (40 points)
Use buffered input to implement mouse selection in the input manager. Left clicking the
mouse over an entity in our game world should select the entity under the mouse (and
unselect any other selected entity). To use buffered input, you will need to
1. Make your input manager inherit from OIS::MouseListener and OIS::KeyListener
2. Register the input manager to handle buffered mouse and keyboard events with, for
example:
mMouse-setEventCallback(this);
mKeyboard-setEventCallback(this);
during contruction or initialization of the input manager, as is done in the base application.
3. Make your input manager capture the mouse and keyboard every tick with, for example:
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mKeyboard-capture();
mMouse-capture();
4. Override bool mousePressed(const OIS::MouseEvent &arg, OIS::MouseButtonID id)
and put your ray-casting, distance thresholding, and finding the closest entity here.
You will want to use the code shown in lab as a guide (40 points).
Cumulative Extra Credit
• Add shift-selection, where pressing the left-shift-key and tab key (or mouse), adds the
next entity to the list of selected entities. User control applies to all selected entities
(+5)
• Add a specific selection sound for each different type of entity. For example, when an
entity of type, say, destroyer gets selected, it says Ready to destroy while when the
frigate gets selected it says Let’s go. Nothing obscene please (+10).
• Third person view forward from a selected entity’s point of view (+5)
• Add group mouse selection (+5)
• Add the ability for selected entities to intercept another entity. Use right-mouse click
to indicate the target ship to be intercepted (+5)
• Add wakes to all entities. This code should be added to Renderer (+5)
Turning in your assignment
Assume that this format will be used for all your laboratory assignments throughout the
semester unless otherwise specified.
1. Demonstrate your working program in the lab on the due date. You will be graded on
your demonstration.
2. In lab, submit the assignment using canvas
(a) Make a subdirectory in your home directory named as5.
(b) Place all your project files in as5 (you will demo from this folder in lab).
(c) Tar and gzip or Zip the entire folder and submit using Canvas
Ask me or one of the TAs if you have questions.
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Objectives
1. Demonstrate an ability to apply knowledge of computing, mathematics, science, and
engineering by learning and applying knowledge of C++ and game engine architecture
to solve the problem of implementing a game engine
2. Demonstrate an ability to analyze a problem, and identify, formulate and use the
appropriate computing and engineering requirements for obtaining its solution by using
inheritance, callbacks, and polymorphism
3. Demonstrate an ability to use the techniques, skills, and modern engineering tools
necessary for engineering practice by using the ogre engine framework and the eclipse
IDE
4. Demonstrate an ability to apply design and development principles in the construction
of software systems or computer systems of varying complexity such as our game engine
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