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→Work Breakdown and Progress
== Enhancement ==
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'''Title: Multi-threaded Node Absolute Calculator'''
'''Enhancement Result'''
* The frames frame flow much smoothly is very smooth due to the transformation of the node chains is which are updated concurrently and efficiently during rendering instead of being done sequentially.
* The program runs significantly faster significantly. To show improved performance of the Emperor Engine, we used Performance and Diagnostic tool in Visual Studio on the a lab computer. It shows that by using thread is multiple threads, performance has improved 10 times faster than before.
[[File:Node Absolute Calculator Result.jpg]]
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'''Enhancement Process'''
* Class ThreadPool
** A class An object of ''ThreadPool'' class is created which creates threads at its initializationto accept threads in a vector called ''threads''.** The number of threads depends on the number of the computer core systemsystems, it can be obtained at the run time through std::thread::hardware_concurrency() in ''ThreadPool'' constructor, and it is stored in a std::vector called ''threads''.** The ''threadPool'' is a queue holding jobs which is are defined as std::function, and a job is added into ''threadPool ''in ''AddJob'' function.** std::mutex and std::condition_variable is used to lock and unlock threads status and to wake threads respectively. In addition to, two bool type variables (quit and stopped) are flag determining flags to run threadsdecline a new job while the thread pool is shutting down.** In ''Run'' function, the ''threadPool'' dispatches the a job to each thread to be finished one by one until all jobs are done or the program is terminated.
** The ''ShutDown'' function wakes all threads up and makes them join to be terminated.
* To Use the Threads
** When the NodeManager performs the function updateValues for each active object from the vector activeObjects, jobs(active objects(Node)’ _updateAbs function) are add added to the queue threadPool which means an added job is waiting to calculate node’s absolute transformation.** While adding jobs, one slept thread from the thread pool wakes up, and perform performs the ''Run '' function subsequently.** Before the function ''updateValues '' ends, threads are terminated through the ShutDown function of ''ThreadPool''.
'''Enhancement Description'''
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Multi-threading technology is used for calculating node absolute transformation in Emperor Engine which gives a performance enhancement. Every time the engine renders a scene with the nodes (which happens in NodeManager) it works through an iteration using a loop to update the absolute matrix sequentially. By using multiple threads, it works much faster and makes engine work in a more efficient way.
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'''Work Load Division'''
* Member 1(Erquan (Ashley) Bi)
** Work Worked on how many threads need are needed and how they are being divided and dispatched form the thread pool to a vector of threads for each core to calculate node absolute transformation on hardware.
* Member 2 (Eunju Han)
** Manager thread Managed threads’ running and termination with determined threadsand Merged code with Ashley’s work and tested with the client program (Lab8). '''Source Code Repository'''<br/>[https://bitbucket.org/Apex_Page/scs_emperor https://bitbucket.org/Apex_Page/scs_emperor]
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[https://scs.senecac.on.ca/~oop345/pages/content/multi.html Multi-Threading of OOP345]
[http://www.cplusplus.com/reference/thread/thread/ std::thread]
<br/>* BitBucket Fetching a remote reference<br/>https://help.github.com/articles/fetching-a-remote/<br/><br/><br/>
<s>Sphere Collision or View Frustum Culling</s><br/>
<s><Sphere Collision Resources> <br/>
== Work Breakdown and Progress ==
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'''Lab completed'''
*Ashley: Lab2, 4, 5, 7, 10, OpenGL lab8 and 9<br/>
*Eunju: Lab1, 3, 6, 8, 9, OpenGL lab7 and 10<br/>
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'''Lab Workload Plan'''
*Anybody: lab1(Eunju)<br/>
*Eunju: lab3,6,9<br/>
*<s>Frank: lab4,7,10</s><br/>
{| class="wikitable sortable" border="1" cellpadding="5"
| Submit Proposal / Research Document || Group|| YES ||Friday October 16th, 2015
|-
| Lab 4 || <s>Frank</s> Ashley || Yes 2015-11-03 (late because of team member set back) || 2015-10-16
|-
| Lab 5 || Ashley || Yes 2015-11-03 || 2015-11-03
| Lab 6 || Eunju || Yes 2015-11-07(1 min late because of merging issue) || 2015-11-06
|-
| Lab 7 || <s>Frank</s> Ashley|| Yes 2015-11-13 || 2015-11-13
|-
| Lab 8 || <s>Ashley</s> Eunju || Yes 2015-11-20 || 2015-11-20
|-
| Lab 9 || Eunju || Yes 2015-11-26 || 2015-11-27
|-
| Lab 10 || <s>Frank</s> Ashley || NO Yes 2015-12-04 ||2015-12-04
|-
| OpenGL Lab7 || AshleyEunju || NO Yes Code 2015-12-13 ||2015-11-13
|-
| OpenGL Lab8 || Eunju Ashley || NO Yes Code 2015-12-13 ||2015-11-20
|-
| OpenGL Lab9 || Eunju Ashley || NO Yes Code 2015-12-13 ||2015-11-27
|-
| OpenGL Lab10 || AshleyEunju|| NO Yes Code 2015-12-13 ||2015-12-04
|-
| Submit Engine Enhancement|| Group|| YES ||Friday November 27thDecember 4th, 2015
|-
| Submit Project (completed engine) || Group|| NO YES ||Thursday Sunday December 10th13th, 2015
|-
