Script to change motor torque

[PhunWars]

As title says is there a script useable to change the torque of a motor ? I'm working on a car and if I put high gears the motor loses power and to regain that power I need to increase the motor torque (increasing it from the start will make the car too much unstable)

[TC42]

Oncollide

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(e)=>{scene.my.motorpower=scene.my.motorpower +1}

(incremental)
or

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(e)=>{scene.my.motorpower=500}

(changes variable to set value)
or

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(e)=>{{scene.my.motorpower>=500} ? {scene.my.motorpower=500} : {scene.my.motorpower + 1}}

(increments up to a value 500)
should work if you put the value scene.my.motorpower into the motorTorque attribute of a hinge

[Someone Else]

Actually, put

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{scene.my.motorpower}

into the motor torque thing in the SCRIPT MENU. Or, if you want to make it phunlet-friendly (that is, it does not use any scene.my variables), use materialVelocity of a box that touches a circle that already has your scripted hinge on it. materialVelocity is speed, friction is torque.

Also, you must first declare scene.my.motorpower = 100 in the console. Press F11 or ~.
And, whatever you choose to use in the above post should go in a box off to the side.

[PhunWars]

Oncollide

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(e)=>{scene.my.motorpower=scene.my.motorpower +1}

(incremental)
or

Code: Select all

(e)=>{scene.my.motorpower=500}

(changes variable to set value)
or

Code: Select all

(e)=>{{scene.my.motorpower>=500} ? {scene.my.motorpower=500} : {scene.my.motorpower + 1}}

(increments up to a value 500)
should work if you put the value scene.my.motorpower into the motorTorque attribute of a hinge

Ok, but the motor already collides with 2 transmission spheres that collides with the rear and the front wheel...can I use a laser or something ? For example: pressing U motor torque becomes like 10000 and pressing D motor torque becomes 5000 or something like that

[TC42]

Yup, just use onlaserhit or onhitbylaser instead of oncollide. But then it won't be phun-friendly.

into the motor torque thing in the SCRIPT MENU

That's what I meant, I just didn't explain it well

[Someone Else]

onLaserHit or onHitByLaser can still be phunlet-friendly. Just shoot scripted lasers at a box fixated to the car's frame that collides with the motorized circle. Also, laser scripts are slightly different. Use

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e.geom.friction = e.geom.friction + 1

or whatever. Notice how I use e.GEOM.friction. To indicate the laser, use e.laser.color. I use color because lasers have no friction.
onCollide is e.other.friction or e.this.friction. Instead of the latter, I always use just friction. The e.this is implied.

Also, Algodoo recognizes +inf as infinity. -inf is, of course, negative infinity.

[PhunWars]

onLaserHit or onHitByLaser can still be phunlet-friendly. Just shoot scripted lasers at a box fixated to the car's frame that collides with the motorized circle. Also, laser scripts are slightly different. Use

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e.geom.friction = e.geom.friction + 1

or whatever. Notice how I use e.GEOM.friction. To indicate the laser, use e.laser.color. I use color because lasers have no friction.
onCollide is e.other.friction or e.this.friction. Instead of the latter, I always use just friction. The e.this is implied.

Also, Algodoo recognizes +inf as infinity. -inf is, of course, negative infinity.

I know but I need to change motor torque, not friction (gear system is already based on the friction of the wheels)

[PhunWars]

As you can see at the increase of speed (and at the increase of the friction due to the gears) the motor loses power very quickly...

[Someone Else]

Use this as a template thing.

Make a circle that is center-hinged to the background.
Make a box that touches the circle.
Aim two lasers at the box.
In one laser, put this script:

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e.geom.materialVelocity = 100;
e.geom.friction = +inf

In the other laser, put this script:

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e.geom.materialVelocity = 1000;
e.geom.friction = 500

Make the activation buttons of the lasers 1 and 2 respectively.

A simple Thymed phunlet-friendly Algodoo-only engine and transmission combo.
materialVelocity is speed, friction is torque.
Note that it does not change any attributes of the circle. Only the box.
You can add as many gears as you like.

[PhunWars]

Use this as a template thing.

Make a circle that is center-hinged to the background.
Make a box that touches the circle.
Aim two lasers at the box.
In one laser, put this script:

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e.geom.materialVelocity = 100;
e.geom.friction = +inf

In the other laser, put this script:

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e.geom.materialVelocity = 1000;
e.geom.friction = 500

Make the activation buttons of the lasers 1 and 2 respectively.

A simple Thymed phunlet-friendly Algodoo-only engine and transmission combo.
materialVelocity is speed, friction is torque.
Note that it does not change any attributes of the circle. Only the box.
You can add as many gears as you like.

It works but the friction with the box makes the car jump and everything becomes unstable, I also tried to increase the density to the motor circle but things just get worse and if I decrease the friction of the box then angular velocity will decrease too, so we are at the start point

[Someone Else]

umm... All I can say is...

1. Experiment with different values. I do not know how malerialVelocity/friction compares with motorSpeed/motorTorque.

2. Put another box with its own scripted lasers on the other side of the circle. Just clone the box and lasers. This should balance the force on one side of the circle with an equal and opposite force on the other side of the circle, which should only produce a torque and not stretch the hinge.