I came here from Arduino videos and I cannot express how grateful I am for everything you're doing Mr. Paul McWhorter. You produce high quality content that I couldn't find anywhere else. Thank you!

Had fun with the kids yesterday building a robot (with box) in the room and having the sphere turn around it. Since teaching the kids is the reason I grind these lessons, I want to thank you for it all. Only the beginning, can't wait for us to build mini robots and play with the arduino eventually. Have a great day sir! 💥☕

Already made an appointment on my calendar, not that I would need one because I am subscribed and part of the notification squad. Can't wait till Paul does a Data Analysis Python tutorial, solely on libraries like scipy, numpy, pandas :) Will become a Patreon supporter when I get my first paycheck!

I am Legend. I just followed your 1D animation. Then just extended to 2D like carrom Board. Then finally I did 3D. Just with two extra "if" statements and eight new variables. All thanks to you Paul. Great Tutorials. I really appreciate your effort and being consistent.

Got it! Legendary, Great Lesson Paul!!

I AM LEGEND!! I somehow managed to complete this with only one error, switching a < and > for the if statement for the z direction. This was so satisfying to complete and watch, thanks so much for the great lesson Mr. McWhorter!!

First one was excellent. I saw the '3D Graphics..' in title and was like; _Already?..._ lol. Best wishes and keep up the awesome.

Another great lesson.

Catching up with both your series, all amazing!

I look forward to this video!

That last homework assignment was a good challenge. I learned a lot. Ready for more. :)

Thanks for another great lesson. Appreciate your efforts Paul!

Have been watching your videos from the last 4 days and am so grateful I found your channel I wish you were one of my college professors

Hi Paul, "I am Legend"! I got the homework right first time and it's a work of art. I removed the right hand wall so I could get a bird's eye view of the ball bouncing off all the internal walls (even though the front and right hand walls were not there. Thanks again for a great tutorial.

Commenting during the intro to help the youtube algorithm out :) To simplify the quotes in my IF statement. I created a new VAR roomEdge=(roomWidth/2)-(mRadius)-(wallThickness/2) Then my if statement just got adjusted to: if(xPos>roomEdge or xPos

I AM LEGEND! This is neat stuff. Thanks for your great lessons, Paul!

EXCITING!!!!

I completely get the addition of the two variables for 'perfect bouncing' in one dimension, however for all three, I found it simpler to include more of the original parameters in the conditionals (after all the new parameters were based on the existing ones...: for i in range(0, 3): # shifts the ball incrementally pos[i] = pos[i] + delta[i] # in all three dimensions if (pos[0] >= (width/2 - rad - thickness/2) or pos[0] = (height/2 - rad - thickness/2) or pos[1] = (depth/2 - rad - thickness/2) or pos[2]

Great lesson. Instead of adding the extra variables, I just changed the "if" statement to: "if xPos>((roomWidth/2)-(wallThickness/2)-(marble.radius)) or xPos

Oh my word, I wasn't sure about this to start with but I took my homework a little further and had the user input the room dims to start with then the ball bounces around on a diagonal path with different rates for x and y, very hypnotic to watch, or I'm easily pleased but the nett result is this is great fun.

Got It! Fun stuff

Thank you Paul, it was fun but no secret word at end I solve it with modifiying 1 line : if (xPos>(roomWidth/2)-wallThickness-mRadius or xPos

You know -- oddly enough -- I found the visual graphics of this relatively easier to learn than the syntax stuff. Maybe cause you can see visually the logic unfold for what you are programming. Thank you! No scholastic background in computer programming -- did STEM for Molecular Biology. Greatly appreciate these lessons!

I am LEGEND.. Here is my solution to homework assignment given in Lesson 3 .. I created a new variable called 'ballTravel' .... ballTravel = (roomWidth / 2) - (wallThickness / 2) - (mRadius). Used it in the 'while' loop. . Looks good here. Thanks again Paul for a great lesson mRadius = 0.5 wallThickness = 0.1 roomWidth = 15 roomDepth = 5 roomHeight = 10 floor = box( pos=vector(0, -roomHeight / 2, 0), color=color.white, size=vector(roomWidth, wallThickness, roomDepth), ) ceiling = box( pos=vector(0, roomHeight / 2, 0), color=color.white, size=vector(roomWidth, wallThickness, roomDepth), ) rSide = box( pos=vector(roomWidth / 2, 0, 0), color=color.white, size=vector(wallThickness, roomHeight, roomDepth), ) lSide = box( pos=vector(-roomWidth / 2, 0, 0), color=color.white, size=vector(wallThickness, roomHeight, roomDepth), ) back = box( pos=vector(0, 0, -roomDepth / 2), color=color.white, size=vector(roomWidth, roomHeight, wallThickness), ) marble = sphere(color=color.red, radius=mRadius) deltaX = 0.1 xPos = 0 ballTravel = (roomWidth / 2) - (wallThickness / 2) - (mRadius) while True: rate(30) xPos = xPos + deltaX if xPos > ballTravel or xPos < -ballTravel: deltaX = deltaX * (-1) marble.pos = vector(xPos, 0, 0)

Also doing your AI course where we installed multiple interpreters. Couldn't work out for a moment why my vpython wouldn't run. Then penny dropped - was still in the venv for python 3.6.

nice parameter Sir Paul

As a professional cad designer this is a piece of cake, so sure I'm legend. I did put in a 'glass' in the front so we can see the ball bouncing and yet the box is closed. from vpython import * from time import * mRadius=1 wallThickness=.2 roomWidth=15 roomDepth=20 roomHeight=5.5 floor=box(pos=vector(0,-roomHeight/2,0),color=color.red,size=vector(roomWidth,wallThickness,roomDepth)) ceiling=box(pos=vector(0,roomHeight/2,0),color=color.red,size=vector(roomWidth,wallThickness,roomDepth)) leftwall=box(pos=vector(-roomWidth/2,0,0),color=color.red,size=vector(wallThickness,roomHeight,roomDepth)) rightwall=box(pos=vector(roomWidth/2,0,0),color=color.red,size=vector(wallThickness,roomHeight,roomDepth)) backwall=box(pos=vector(0,0,-roomDepth/2),color=color.red,size=vector(roomWidth,roomHeight,wallThickness)) frontwall=box(pos=vector(0,0,roomDepth/2),color=color.white,opacity=0.15,size=vector(roomWidth,roomHeight,wallThickness)) marble=sphere(radius=mRadius,color=color.blue) deltaX=.1 deltaY=.1 deltaZ=.1 xPos=0 yPos=0 zPos=0 while True: rate(40) xPos=xPos+deltaX if xPos>=((roomWidth/2)-(mRadius)-(wallThickness/2)) or xPos=((roomHeight/2)-(mRadius)-(wallThickness/2)) or yPos=((roomDepth/2)-(mRadius)-(wallThickness/2)) or zPos

Legend!

I am legend!!! Looks like the DVD icon when bouncing in the TV screen but 3D because it has depth!! I wasn't sure at first because the ball only moved in z-axis but after an hour of head banging I got it right

U r a good tutor !!i like all of ur vedios

FULCWL-created 3 classes, each with a method with rate as the object. Ball remained stationary. Now to learn what knowledge from prior lessons needs to be incorporated and why.

Hi Paul Thanks for the tutorials. I believed I had correctly done the homework and it looked good on the screen. Then I saw your solution and realised I had not allowed for the edge of the wall. When the wall thickness is increased to 1 the ball clearly is penetrating to its centre. Must try harder.

something that really tripped me up on this was watching where to put your "-' negative sign at.

Came close but no cigar. Your explanation helps clear the clouds, just have to keep doing. See you tomorrow.

Fun lesson. I am legend!

Legendary bounce...

A simple coordinate geometry and 3D geometry is applied. But one must make sure to clear basic concepts of vectors while working on these projects.

Since mradius is a parameter, you can also use "if xpos > (roomwidth/2)-mradius or xpos < (-roomwidth/2)+mradius"

Great tutorial, thanks. I love coding *and* watching silly cats videos ;-)

I AM LEGEND! I did my homework, and out of curiosity, I made a room with a functioning door, I added some furniture like a bed and a closet(With functioning doors). Thank you for another amazing tutorial! Edit: The bed part was extremely hard.

You're over thinking the wall bounce. You already have bounce defined by the room width. Therefore, the bounce occurs when the center of the ball hits the edge of the wall. So it's just a matter of subtracting the ball radius in the if statement if(xpos>rwidth/2-mradius or xpos

After creating 6 new variables task is done,I M legend!!

¡Gracias!

I AM LEGENDARY! Like some other commentors, I fixed the bouncing marble running through the wall in lesson 2. I fixed it with parameters in lesson 3.

Sir are your new jetson nano lessons are coming ,if yes when?

I am legend. Varying each of the delta values by small amounts makes it much more interesting. 😉

Hello Paul, Excellent lesson and I love your use of math equations to explain what needs to be accomplished !!!! Excellent teacher !!!!!! The best !!!!! I did have one question. When you changed to a bigger box and a bigger marble something about the box doesn't look right. Either both the floor and ceiling looked too short or both of the walls needed to be moved in. It looks like a box with a notch in the four corners. Should this be? Is not what I would have expected. Thanks again for your great lessons !!!! Rick

why is it that when deltax is changed to 0.5 the marble goes through the wall slightly? I can't find a solution to this, the velocity of the ball shouldn't affect whether the conditionals are met or not...

In the lesson I put a comment about making the ball bounce back when it touched the was rather then halfway through, but I have to admit that I did not account for the thickness of the wall. with the code I showed if you made the wall thickness 3, my ball would enter the wall. As you said, as coders we need to test under different conditions, especially the extremes. Fixed solution below.: if (xPos+wallThickness/2 >= (roomWidth/2-mRadius) or xPos-wallThickness/2

I AM LEGEND TOO! Very learningfull. But please close room corners by adding wall thickness to wall width, length and depth. :)

Hey Paul, will you please create lessons for coding an arduino in Python. Thank You!

I got mine to work but I guess I did not fully paramaterize everything, I just changed my if statement to: "if xPos > (roomWidth - wallThickness) / 2 - mRadius or xPos < (-roomWidth + wallThickness) / 2 + mRadius:" which worked and used less variables/parameters. I guess I am not really sure why having additional variables is better than just changing the if statement. I will try to do the homework using your parameters method to get the ball bouncing in 3 dimensions and see where that gets me!

After a little confusion with why the ball was not moving in the Z direction realised I forgot to add ZPos variable to my ball.position vector, correcting mistakes is best way to learn

Please read : the distance between the left wall and right wall is 10 instead of 5,i apologize

I am Legend. The result is almost as good as a fish tank, with one big round fish. Hours of fun, well maybe a few mins :)

here is what i did to get the marble to stay inside the walls. travel=(roomwidth/2)-mRadius-wallThickness/4 if(xPos>travel) or (xPos

Pls advises me what exercise's book could pay to enhance me?

I am a legend!

Here is my solution: if xPos>((roomWidth/2)-(wallThickness/2)-(mRadius)) or xPos

Efficient coding would have the left and right marble edge and the left and right wall edge defined only once OUTSIDE the loop since they do not change

I am legend!

how do we use threads in vpython?

Good

I can't find a setting to make the marble move. Maybe my laptop is too old and doesn't have the graphic card to run this program. The program loads and runs okay. In the prior lesson the marble moved but it wasn't smooth. Suggestions? I'm dead in the water right now

I'm legend 😎 My if statement looks a little bit different My logic was If xPos>((roomW/2)-(mRadius+(wallT/2))) or xPos

I’m legend!

Hey Paul!!! Can I ask you a favor, can you also make a tutorial for c++ please.

I am legend. No cheap lawn chairs for me this week.

I think the calculation is a bit messy, the distance between the left wall and right wall is 5. So, in this case i think we should not consider the wall thickness. I think we should consider the center of the marble and the center of the left and right wall will coincide, so the marble will travel 0.75 less than half of the distance between the edges of the left and right wall. Therefore, the calculation or the code should read like this: If( xPos >(4.25) orxPos

I'm a legend. I used already defined parameter: if x_pos > room_width/2-(m_radius + wall_thickness / 2), oo I have not defined new parameters.

I am legend-ish I know there's got to be a better way, but I divided room width by 2 and then added the marble radius to the wall thickness and then subtracted the sum of each from each other... like this....( roomWidth/2)-(wallthickness+mRadius) or ( roomWidth/2)+(wallthickness+mRadius) BUT, I'm betting you're about to show us a better way.

I could mess with this stuff all day, My wife is starting to get upset. lol

I am ledgend!

Verily, I say unto thee: BOOM!

I am a legend

I am the legend

Increase the rate to 100 that will make you happier :)

mine is roomWidth/2-mRadius that's all

Folded. Tried to extrapolate from X but using 3 if statements just won't work for me. Await your method

I AM LEGEND

I guess that you had entered the wrong DATE OF PREMIERE. it says that it will premiere on august 4th...

this is the only channel i turn my addblock off

I am LEGEND

I am legend 👍

I am Legend! I modified the parameters a bit so the outside corners are square. Took me a few tries to figure out how to give it a push in the 'Z' direction, it was really obvious, just didn't see it at first :) Here is a video of it working. kzfaq.info/get/bejne/edqVg9J11L3Hn2w.html

I am legend B)

Hello Paul, This is the KZfaq address of my homework: kzfaq.info/get/bejne/q9l8l5R2ua7Mj4U.html My computer is very slow, this makes the image jumpy, and it was difficult to move the image on the browser precisely. Opacity of the walls is 0.2, so the movements in the z axis can be seen better.

22:44 thara bhai joginder🤣🤣🤣🤣

Who’s the Huckleberry? You’re the Huckleberry and, judging from the background photo, it looks like Jim might be your son-in-law.

for thin wall only haha sorry

Are you serious? It's in August. Really? Who would wait that long?

Thank, Paul. I'm having a blast with your tutorials and am excited to see how to relate this to the real world. There was one parameter change that caused the ball to protrude the wall - I'm wondering if this happens with yours also. I increased DeltaX to 1 in order to speed up the ball movement; this caused the issue. I realize now that I could increase the velocity of the ball by increasing the rate(), but why do you think DeltaX would cause this anomaly?

I am legend!

I AM LEGEND

I AM LEGEND