CISC/CMPE 454 Computer Graphics - Assignment 3 - Physical Simulator
454 Assignment 3
You will implement parts of a physical simulator.
Step 0
In Linux or MacOS, go into the 'linux' or 'macos' directory, compile the code with 'make', then run it from the command line as
./anim ../tests/test1.txtIn Windows Visual Studio, double-click on the a2.vcxproj file, check that the command-line arguments in the Properties are
..\tests\test1.txtand then compile and run the code.
NOTES:
- If you do not include a command-line argument, the program will
generate random spheres.
- The last spheres generated are recorded in ../tests/lastSpheres.txt,
which you can use for testing if you encounter an error in the
randomly-generated spheres.
- We will test on different inputs.You can drag the mouse with the left button down to move the viewpoint. Dragging up/down with the right mouse button zooms in and out.
Pressing 'p' pauses or unpauses.
Pressing 'c' shows the line between each sphere and its 'contactPoint', which will be useful for your debugging. Between spheres the line goes only half-way to the contact point on the other sphere.
Pressing '+' or '-' increases or decreases the simulation speed, which starts at half of real time.
Step 1
[1 mark] Implement pointToEdgeDistance() in linalg.cpp according to the comments above that function.
Step 2
[3 marks] Implement Sphere::distToRectangle() according to the comments in that function.
At this point you should test your code by running it on test1.txt. Press 'c' to see the closest point to the sphere, which should be the bottom of the pit.
Then move the sphere (in test1.txt) so that it is close to, but does not touch, one of the pit edges. Press 'c' and verify that the closest point is on the edge.
Then move the sphere outside one of the pit corner and test again that the closest point is now that corner.
Get this code tested and working before proceeding.
Step 3
[2 marks] Implement World::integrate() in world.cpp according to the comments in that function.
Now test this with the original test1.txt to see that the sphere accelerates downward.
Step 4
[3 marks] EFFICIENTY and CLEANLY implement the binary search in World::updateStateByDeltaT() according to the comments in that function. At least one mark is for clean and efficient code.
Step 5
[0 marks] Read and understand findCollisions().
Step 6.
Implement sphere/sphere [3 marks] and sphere/rectangle [2 marks] collision resolution in World::resolveCollision() according to the comments in that function.
Do sphere/rectangle collision first and test it with the original test1.txt. Once that is working, move the sphere so that it hits an edge of the pit and test that the collision causes the sphere to move in the correct direction.
Finally, implement sphere/sphere collision and test it with test2.txt.
Then try several tests with many spheres by setting NUM_SPHERES_TO_GEN and not providing any command-line arguments.
To Hand In
Make a directory called 'a3'. In that directory, put
- a README.txt file with your name(s), student number(s), and netID(s)
- All of the *.h and *.cpp files, even if you did not modify them.
- DO NOT INCLUDE ANY OTHER FILES. YOU WILL LOSE MARKS OTHERWISE.Create a ZIP archive, named a3.zip, of the a3 directory and upload it to OnQ.
IN GROUPS OF TWO, ONLY ONE PERSON SHOULD UPLOAD THE ASSIGNMENT.
