how to get info

[scorp200]

how to get info from an object like its Energy?
so it can be added to a variable

[Kilinich]

There is no easy way to do it. But it's possible for circles/boxes via app.step/undo trick.

[scorp200]

um what?

[Mystery]

He's talking about Method X
viewtopic.php?f=13&t=545

Simply using Method X you can't get the energy but with some math you can.
(Can some of the Physic junkies help me out here.) You can find the Dimensions with Method X

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e.other.size := [0.0, 0.0]; App.step; App.undo

or for circles

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e.other.radius := 0; App.step ;App.undo

and Density with collide.

For Squares to find the area simply

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scene.my.area = (e.other.size(0) * e.other.size(1))

For circles (I may be very wrong here)

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scene.my.area = (e.other.radius^2 * 3.14159265) * 2

then times the area by the density to get the mass

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scene.my.mass = scene.my.area * e.other.density

Then you can get the Velocity with Method X
Then it is a matter of using the mass and the velocity to find out the kinetic energy which is totally unknown to me and i'm hoping one of our many Physics gurus can help.

With some help from rara I've made the final code

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scene.my.Kenergy = ((scene.my.mass * e.other.vel(0) + e.other.vel(1)) ^ 2) / 2

So all together now
The magic code to get energy from an object.
Variables needed (Put this into the console)

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Scene.my.mass := 0;
scene.my.kenergy := 0

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     e.other.vel := [0.0, 0.0];
    e.other.size := [0.0, 0.0];
    App.step;
    App.undo;
    scene.my.mass = (e.other.size(0) * e.other.size(1)) * e.other.density;
    scene.my.Kenergy = ((scene.my.mass * e.other.vel(0) + e.other.vel(1)) ^ 2) / 2


Unfortunately the code for energy doesn't work an unexplained error in my code or a bug in algodoo is causing it to be a bit weird.