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# [mailto:flbotos4@myseneca.ca?subject=GAM531 <s>Ferenc Botos</s>]

assignment <br/>'''Title: Multi-threaded Node Absolute Calculator'''  '''Enhancement Result''' * The frame flow is very smooth due to the transformation of the node chains which are updated concurrently and efficiently during rendering instead of being done sequentially. * The program runs significantly faster. To show improved performance of the Emperor Engine, we used Performance and Diagnostic tool in Visual Studio on a lab computer. It shows that by using multiple threads, performance has improved 10 times. [[File:Node Absolute Calculator Result.jpg]] <br/>'''Enhancement Process''' * Class ThreadPool** An object of ''ThreadPool'' class is created at its initialization to accept threads in a vector called ''threads''.** The number of threads depends on the number of the computer core systems, it can be obtained at the run time through std::thread::hardware_concurrency() in ''ThreadPool'' constructor.** The ''threadPool'' is a queue holding jobs which 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 flags to decline a new job while the thread pool is shutting down.** In ''Run'' function, the ''threadPool'' dispatches 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 added to the queue threadPool waiting to calculate node’s absolute transformation.** While adding jobs, one slept thread from the thread pool wakes up, and performs the ''Run'' function subsequently.** Before the function ''updateValues'' ends, threads are terminated through the ShutDown function of ''ThreadPool''.  '''Enhancement Description'''<br/>Multi-threading technology is used for calculating node absolute transformation in Emperor Engine which gives a performance enhancement option. 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.<br/><br/> '''Work Load Division''' * Member 1(Erquan (Ashley) Bi)** Worked on how many threads 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.

'''Source Code Repository'''<Sphere Collision Resourcesbr/>[https://bitbucket.org/Apex_Page/scs_emperor https://bitbucket.org/Apex_Page/scs_emperor]

[http://gamedev.stackexchange.com/questions/313/what-is-a-good-algorithm-to-detect-collision-between-moving-spheres What is a good algorithm to detect collision between moving spheres?]</s>

BitBucket Fetching a remote reference'''Project completed'''<br/>httpsOur team Apex, has finished Emperor_Engine Version 1.0. We completed testing it with Directx11 in release mode. There are also all four OpenGL lab codes filled in, and we have tried to re-implement all part OpenGL we need. However, due to the lack of time and some reasons related to materials and textures, this game engine with OpenGL does not work properly. [[File:apex_version1.png]] <br/>'''Engine enhancement completed'''<br/help>Our team Apex has submit Engine Enhancement assignment with the tag "EngineEnhancement" on the group repository on Nov 27th, 2015.github<br/>Please look at the section above in details.com/articles/fetching-a-remote/ 

'''Lab completed'''*Ashley: Lab2, 4, 5, 7, 10, OpenGL lab8 and 9<Lab workloadbr/>*Eunju: Lab1, 3, 6, 8, 9, OpenGL lab7 and 10<br/> <br/>'''Lab Workload Plan'''

*<s>Frank: lab4,7,10</s><br/><br/>

| Submit Proposal / Research Document || Group|| NO 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 6 || Eunju || Yes 2015-11-07 (1 min late because of merging issue) || 2015-11-06|-| Lab 7 || Ashley|| Yes 2015-11-13 || 2015-11-13

| Lab 7 8 || FrankEunju || NO Yes 2015-11-20 || 2015-11-1320

| Lab 8 9 || Ashley Eunju || NO Yes 2015-11-26 || 2015-11-2027

| Lab 9 10 || Eunju Ashley || NO Yes 2015-12-04 || 2015-1112-2704

| Lab 10 OpenGL Lab7 || FrankEunju || NO Yes Code 2015-12-13 ||2015-1211-0413

| OpenGl Lab1 OpenGL Lab8 || none Ashley || NO Yes Code 2015-12-13 ||Week 132015-11-20

| OpenGL Lab2 Lab9 || none Ashley || NO Yes Code 2015-12-13 ||Week 132015-11-27

| OpenGL Lab3 Lab10 || none Eunju|| NO Yes Code 2015-12-13 ||Week 132015-12-04

| Submit Engine Enhancement|| Group|| NO YES ||Friday November 27thDecember 4th, 2015

| Submit Project (completed engine) || Group|| NO YES ||Thursday Sunday December 10th13th, 2015