Freezing water on collide

[rowanphilip]

Is it possible (and how) to freeze water on collide with a solid? Please don't give negative replies. I am new to algodoo scripting and I cannot find this on the forums.

[daniels220]

It's possible to liquify a solid on contact with anything, but I don't think the reverse is possible, since a blob of water isn't a single object. I'm not sure collisions with water even trigger onCollide (on the other geom), and water particles certainly don't have an onCollide event of their own. There is an algorithm in Algodoo for whether a water particle is "in contact" with another, which could be used to find contiguous bodies of water, but there's no way to freeze them.

[rowanphilip]

Ok, I know that you can freeze water manually, I was just wandering if it could be done when a certain target is met.

[TC42]

I mean, technically you can do it, it would just be insanely complicated. You would have to spawn geoms (polygons, probably) in the shape of the contacting water droplets, and fix them to existing geoms, then delete the water droplet that contacted them. It certainly can be done, it would just be really difficult. If you manage to pull it off, I will be extremely impressed.

[Dare]

... or you could make polygon water, such as this, and make the density become +inf when it collides with something.

Code to freeze:

Code: Select all

(e)=>{e.this.density := +inf}

Code to unfreeze:

Code: Select all

(e)=>{e.this.density := 2.0}

Obviously you can change the density back to any value you want, but 2.0 is the default value.

[rowanphilip]

The problem is that it collides with itself and freezes when you don't want it to.

[Rideg]

Density of water is 0.1kg/m^2.

Make several circles with controllerAcc = "unique number" example 1995.
Give freezer's controllerAcc an = "unique number" example 1337.

OnCollide:

Code: Select all

(e)=>{
    e.other.controllerAcc != 1995 ? {
        e.other.controllerAcc == 1337 ? {
            e.this.density = +inf;
            e.this.controllerAcc = 1337;
            e.this.color = [0.8, 0.8, 1.0, 1.0]
        } : {}
    } : {}
}

Try.