SketchyPhysics 3x June 27 version.

CPhillips

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

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

CPhillips

I dont know about the sound. I havent touched that code in a while, but I will see if it still works and let you know.

Physicsguy1

Tracks'n'Treads are much easier. I realy like the new version!

tank.skp

CPhillips

Me too! Self connecting joints are a feature I have been trying to achieve since version 1. I HATE the JCT. Its hard to explain, tedious to use and is the reason you cant copy jointed objects. Its THE major reason I started SPIV. So, I am really glad it turns out to be possible in SP3.

CPhillips

Here is an example of a very simple camera system.

The first example puts the camera eye at the position of the sphere and looking at [0,0,0].

The second example finds the cone in the scene and looks at that. Note you can drag the cone and the camera will follow.

The @simulation.camera.set commands parameters are location of the eye, the target and the "up" direction.

The camera is the same as the camera in the Sketchup API:
http://code.google.com/apis/sketchup/docs/ourdoc/camera.html

camerasimple.skp

cameraFollow.skp

Physicsguy1

Now we can create multi-roll games!

JaViXP

@cphillips said:

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

onend{
>    group.erase!
> }

Thanks, now it's much better (After a few times playing the animation it becomes kinda slow).

PhysicsGuy, well done I like your boxes creator, but there are too much boxes and it'll make the simulation laggy.