Coding Math: Episode 8 - Velocity

This starts the basic physics series and builds on the vector info from episodes 6 and 7.

[robl]

These are incredibly useful tutorials. Thank you so much. I haven't seen a single down vote on any of your videos yet, rarely something that ever happens with programming videos. It is good enough for experienced programmers, yet simple enough for beginners.

[LlewellynvonHellen]

Only 9040 views... I'm proud to be one of the small number of people who can animate objects (using HTML5's Canvas tag and JavaScript) based on vectors and velocity because of this video. Great work! You are 師傅.

[BabooVII]

Dude!!! Your videos are good!!! They make grasping this stuff much easier than the other stuff online. You should write a Cheers mate!

[DrTWG]

I got used to using constructor functions, then putting methods on the prototype, then using 'class', then adding static methods to return new instances from different parameters & now I've got this - ! Thankfully they are not that much different from each other ! This series is excellent. Thanks .

[dvladyko]

That some magic! Incredible.
I haven't known until today why I do need these silly vectors. Wow. Just wow.

[mubeenghafoor]

Awesome explanations... making things so simple and understandable

[JeromePrevost]

Great tutorials !
Looking forward to watching more :)

[ScaredHelmet]

9:12 I've been playing too many video games. I clearly see a bloodspatter.

[jim_o]

9:10 I'll refrain from exaggerating but I believe you just made a Big Bang simulator :)

[cprn.]

I think you've never got into pixels / second. Just saying. For the interested parties: passes current timestamp to callback so you can calculate the time in seconds since last frame and multiply all your pixel values by the result.

[stronzdimerd]

Already the highlight of my Mondays! Any plans to get into the advanced topics you covered in the second Flash animation book? Would be awesome to be able to have a Javascript reference for those techniques, especially steering behaviors.

[madhuracharya]

i came across a little problem with the vectors. I have the exact same code that you are using, and I wanted to make an object move in a circular path around a particular point. to do this, in theory, placing the velocity vector tangentially to the position vector would do the trick.
but while testing it the object moves in a circular path but slowly spirals outward. this is the code that I used.

position= vector.create(0, 0);
velocity= vector.create(0, 0);
velocity.setLength(5);

// and in the loop
context.beginPath();
- Math.PI / 2);
position.addTo(velocity);
context.arc(position.getX(), position.getY(), 20, 0, Math.PI * 2);
context.fill();

can you help me fix this?

[literalcode]

Is it bad that I read: “Cooking Meth” when I scrolled past it?

[chhorchamreun]

could u do this code, velocity, acceleration, angle in python language? thanks

[fabio_oid]

What is the use of setting (0, 0) when creating the velocity vector?
changing the values the animation remain the same

[demlar]

Hey Coding math, maybe put your videos in a playlist? it's all over the place. that way episode 1++ can be watched right after the other.