SketchyPhysics 3x June 27 version.

CPhillips

This example adjusts linearDamp to make bodies act like they are in space. Also shows that objects can be started in motion.

orbit4.skp

CPhillips

Simple breaking objects. The breaking interface is really a work in progress. Sometimes objects breaking can cause Sketchup to crash.

Break1.skp

Wacov

In the ontouch event, is the speed the speed of the collider at impact... and pos the point of impact?

And thanks for those demos!

Here's my first proper model with it, copyable ragdolls! You can't freeze them normally, but you could probably set them to freeze on frame 1, after the joints have connected.

Copyable ragdoll.skp

Wacov

Chris, how DO you freeze objects in script? Has that been added yet? I've tried frozen=true and frozen(1), but no luck.

Physicsguy1

Since this version is unstable, it would be best if you created a method that stops the simulation, after an amount of time, if something strange happens, or the ismulation gets laggy(breaking feature).

CPhillips

@wacov said:

In the ontouch event, is the speed the speed of the collider at impact... and pos the point of impact?

Yes.

CPhillips

@wacov said:

Chris, how DO you freeze objects in script? Has that been added yet? I've tried frozen=true and frozen(1), but no luck.

Doesn't look like I have hooked that up yet.

CPhillips

@unknownuser said:

Since this version is unstable, it would be best if you created a method that stops the simulation, after an amount of time, if something strange happens, or the ismulation gets laggy(breaking feature).

There isn't a "magic bullet" for that. I need to find all the different ways it can break and then tackle them one at a time.

Post any code you find that breaks the sim and I'll put the right error checking in.

Wacov

Pretty nice cloth demo. Once again, totally copyable! I love the scripted joints

Copyable cloth.skp

CPhillips

Nice!

Physicsguy1

That's a nice representation of cloth, Wacov!

Wacov

Thanks guys! One thing I'm finding with the cloth is it tends to collide with itself. That seriously slows stuff down, and it's not really neccessary for a semi-realistic simulation. Can we have object-specific collision detection? So, give the choice to either collide with everything, collide with everything except '...', or collide with nothing but '...'. Keep it pretty intuitive, so using a string finds objects of that name, a var for specific objects, and let us put them into an array if needed.

So, on the cloth, I'd name all the bars the same, and tell them to collide with everything except each other. You might also be able to make a crude fluid flow effect by creating spheres that only collide with the static mesh.

phy

I love the new Script field and script but I was wondering is there any way you can control a scripted joint with a slider or key.

JaViXP

Just a little test. Hit Play and see what happens

Download this file

Physicsguy1

YES!! The simulation finally registers in-simulation created objects!

CPhillips

@wacov said:

Thanks guys! One thing I'm finding with the cloth is it tends to collide with itself. That seriously slows stuff down, and it's not really neccessary for a semi-realistic simulation. Can we have object-specific collision detection? So, give the choice to either collide with everything, collide with everything except '...', or collide with nothing but '...'. Keep it pretty intuitive, so using a string finds objects of that name, a var for specific objects, and let us put them into an array if needed.

So, on the cloth, I'd name all the bars the same, and tell them to collide with everything except each other. You might also be able to make a crude fluid flow effect by creating spheres that only collide with the static mesh.

In the physics engine you would need materials to do that. So don't expect it until SPIV.

One thing you could do that might speed things up is to change the connect script to something like this.


ontouch{|t,s,p|
   connect(t,"ball") if frame==1

    #empty the ontouch event after the first frame.
    #this will ensure that ontouch isnt called again.
   ontouch{} if frame>1 
}

CPhillips

@phy said:

I love the new Script field and script but I was wondering is there any way you can control a scripted joint with a slider or key.

Not yet. But I will do that next.

CPhillips

JaViXP it will work better if you change the onend to this:

onend{
   group.erase!
}

Physicsguy1

Will we be able to embed sound files anytime soon?

Physicsguy1

I tried something similar to javixp's line generator, but the groups I generated are not registered.

scriptedrandomcube.skp