Velocity question

[icrls984]

Is there a formula for calculating the total speed of a object? If so, how? I would like to make an object explode if it collides with other objects too fast.

[Kilinich]

Do you mean speed of impact? Well, something like this:

onCollide = (e) => {iv := e.this.vel - e.other.vel; spd := (iv(0)^2 + iv(1)^2)^0.5; spd > 10 ? { <do explosion> }:{}}

[icrls984]

Thank you. I will try this.

[Algonaut]

Hi
I have a question: Why I can't accessing to velocity of an object? I have a rectangle. Text in rectangle should show me the speed of them if he collide something:

text = {scene.my.speed + ""}
onCollide = (e) => {scene.my.speed := e.vel}

but it doesn't works! The same function but with position works! By touching I can see the position of collide on rectangle

I already tried with:
(e) => {scene.my.speed := e.this.vel}
(e) => {scene.my.speed := this.vel}
(e) => {scene.my.speed := e.velocity}
(e) => {scene.my.speed := e.this.velocity}
and so on...

Is it a bug? I use Algodoo v2.0.1

[electronicboy]

Try {"" + scene.my.speed}, that way Algodoo knows it's adding onto a string. also, for collisions it's e.this.vel or e.other.vel.

[Algonaut]

thanks for answer!
see the picture. What I did wrong?
It doesn't work!
The text keeps "0"

algo

algo.JPG (28.19 KiB) Viewed 4973 times

[Kilinich]

1) you need to create variable from console before use
2) it should show speed value for box only on collide (one time)

[electronicboy]

Also, you made a spelling mistake in the oncollide box.

[Algonaut]

1) I did so
2) I know.

@ electronicboy : I have corrected, but nothing changed

see that:

algo.JPG

nothing happened

(30.38 KiB) Not downloaded yet

could you try it on your computer ? - maybe it is not possible what I want to do

[Kilinich]

We could not help you to do elementary things
Look at attached scene:

[Algonaut]

I don't understand, why it doesn't work! It's elementary
Maybe some variables you can't read???

[Algonaut]

I've just tested it with other variables like angle, anglevel, size ... . Nothing works. Only position works.

[Kilinich]

It works fine with any e.this. variables like angle, angVel, size...

[Algonaut]

I just managed it!
The reason was this function: "readable(owner) ..."
I accidentally found it in a scene here on this site!
I tried everything but nothing works. I can't read some variables without the function readable!

look at the background on the picture: You see the velocity of the object

[Kilinich]

Do you use 2.1.0 ?

[Algonaut]

Do you use 2.1.0 ?

no, 2.0.1
Why are you asking?

[Kilinich]

Do you use 2.1.0 ?

no, 2.0.1
Why are you asking?

Because thats why it's not working. Please update.

[Algonaut]

Do you use 2.1.0 ?

no, 2.0.1
Why are you asking?

Because thats why it's not working. Please update.

если я апдэйтну, то моя крякнутая версия будет дальше работать?

[Kilinich]

если я апдэйтну, то моя крякнутая версия будет дальше работать?

Algodoo 2.1 полнофункциональная и бесплатная, чудо ты. Учи английский.

[Algonaut]

если я апдэйтну, то моя крякнутая версия будет дальше работать?

Algodoo 2.1 полнофункциональная и бесплатная, чудо ты. Учи английский.

sometimes, I will do it