Thyme applyForce function

[macunixgeek]

I think that there should be functions added to the objects that can apply forces and impulses to objects.
EX:

Code: Select all

[object].applyForce(force vector)
[object].applyForceLoc(force vector, position relative to object center)
[object].applyAngForce(force in radians)
[object].applyAngForceLoc(force in radians, position relative to object center)
[object].applyImpulse(impulse vector)
[object].applyImpulseLoc(impulse vector, position relative to object center)
[object].applyAngImpulse(impulse in rpms)
[object].applyAngImpulse(impulse in rpms, position relative to object center)

I think this could be used for simulating physical effects that Algodoo doesn't simulate on its own, such as suction, aerodynamics, linear motors, etc...

[Rideg]

This could be very fun to experiment with and teaching at the same time. Support + 1

[Rrobba]

Yup, could come in handy!

Here we go...Support +2

[Versieon]

+3

thats 6 already

[tatt61880]

[object].applyForce(force vector)
[object].applyForceLoc(force vector, position relative to object center)

Same function name might be better for 1 argument and 2 argument.
i.e. object.applyForce(force_vector [, position_relative_to_object_center])
//which "position_relative_to_object_center" is optional argument.

+4

[macunixgeek]

Same function name might be better for 1 argument and 2 argument.
i.e. object.applyForce(force_vector [, position_relative_to_object_center])
//which "position_relative_to_object_center" is optional argument.

That was my initial thought, but I didn't know if function overloading was possible in Thyme.

[tatt61880]

Same function name might be better for 1 argument and 2 argument.
i.e. object.applyForce(force_vector [, position_relative_to_object_center])
//which "position_relative_to_object_center" is optional argument.

That was my initial thought, but I didn't know if function overloading was possible in Thyme.

As far as I know, function overloading is currently impossible.
Emil will add it if he think it is useful and appropriate, though.

[Rideg]

It's educational. That's a big reason to implement it as Algodoo is a educational program that's intended to be used by teachers, schools or any other educational use. With this, the techer could Explain what should happen if we apply a certain amount of force, and with this you can simply type in the force as a vector and use it somwere on a object. Then the students could calculate how much velocity the object should gain, how fast it should twist if you apply the force on the edge of the object, and so much more.

So yeah, this suggestion does have a reason to be implemented.

[tatt61880]

I suggest drag-able vector for forces and velocities.

[Rideg]

what do you mean? Ain't this possible allreadey :O

[Versieon]

no, all we can do is adjust sliders to creat a vector, draging a vector would be usefull for students and visualisation.

[Antotabo]

And how long does the force act?? Forever or thre could be another argument for how much time the force act??

Also, those are useless:

[object].applyAngForceLoc(force in radians, position relative to object center)
[object].applyAngImpulse(impulse in rpms, position relative to object center)

Since torque is equivalent no matter how far you are from the center.

[macunixgeek]

Also, those are useless:

[object].applyAngForceLoc(force in radians, position relative to object center)
[object].applyAngImpulse(impulse in rpms, position relative to object center)

Since torque is equivalent no matter how far you are from the center.

I meant that the force would rotate the object around the specified point. Also, the force would be instantaneous.

[Antotabo]

I meant that the force would rotate the object around the specified point. Also, the force would be instantaneous.

Did you take the time to try to understand what I meant?? I know what you meant.

But, A force applied during 0 time equal no work at all. So this doesn't work. A force have to be apllied for a certain amount of time for it to have an effect.

And you can't rotate an object around a specific point other than its center of gravity by applying a rotationnal force. You need another external force to displace the mass centerpoint in the space. Unless you are NOT in a physic simulator, those two unreal forces doesn't fit Algodoo. It become more of an animation thing and this is not. Also I don't think it would be useful. If you really want to make this behaviour use a hinge, and then we would be ok with the physics.

Hope you understand my point.

I just want to help you with this because I think it would be great addition to Thyme.

[macunixgeek]

I think I see what you're saying. I guess the force would be applied over one timestep if it can't be applied instantaneously.

[Kilinich]

Suggested before so many times...
It's the most wanted feature of all time since Phun got scripts

But I think your implementation is a bit complicated.
object.externalForce ([x,y], M) is enough.

[Nxdt]

Support + what number are we on?
Bit complicated though, i suggest trying to simplify it like kilinch said.

[Sonic]

I support. Then I could make an unstoppable force vs an immovable object

[macunixgeek]

I support. Then I could make an unstoppable force vs an immovable object

heh. applyForce([+inf,0]). I think the object would just disappear then...

[Sonic]

Or the game would just crash. Either way...it'll be fun.

[Chronos]

The force would just go through the object.

[Sonic]

With Algodoo's glitchy physics, you're probably right.

[Versieon]

Yes, you can already sort of try this with an inertia mult set to inf and then add angular velocity in the velocity menu. Then put it between two unmoveable blocks and watch what happens.