Moving Boat

[Ilmanine]

Hi,

I'm trying to sim a boat that would do a 180 turn and travel a total of 250m. I've tried doing with a box constrained to the boat anim like in the ship in ocean tutorial but it doesn't seem to work.

http://imgur.com/KAPOa8K

What I'm trying to achieve would be something similar to this, even though slower and only one boat, but I think the principles would be the same:

https://vimeo.com/64140693


Is my only option to make the sim area the size of the whole path?


Thanks

[georgi.zhekov]

Hello,

You can't have the water being pushed by the boat outside of the simulator walls. Even in the example you have posted you can see that a large static simulator is used.

So just make your simulator bigger so it covers your animation path and you should be good to go.

[Ilmanine]

Thank you. It will take longer to sim but at least will work.

The sim is doing something weird though,

http://imgur.com/x8NrT94

Any idea why?

[georgi.zhekov]

Indeed something is not right.

Can you send it over to support@chaosgroup.com or attach it here so we can take a look what is wrong?

Thank you,

[Ilmanine]

Here it is. I did a save select of everything relevant to phoenix.

[georgi.zhekov]

You have saved the scene with a demo build - this resets the settings on file open so I can't say much about it but it looks like one of the known bugs and we're working on it.

[Ilmanine]

Ok thanks. So there is nothing I can do? Or I just simply can't do this on Phoenix?

[georgi.zhekov]

Using the demo - no I'm afraid.

[Ilmanine]

Hi again,

So no more demo version, I have the full version and still happening the same.

The surface is huge which I guess could cause problems and HUGE sim times but don't know another solution.

[Ilmanine]

Ok I've managed to reduce the Sim size considerably now... Also changed the scene scale back to 1 and got more cells and animated the simulator to go up in Y to follow the boat but still have some weird stuff happening. The strict horizontal line you see is actually the simulator starting point. So he started there and when he goes up the liquid is at a lower level, leaving that edge there.

[georgi.zhekov]

Is the simulator linked to the boat? Your resolution looks quite low from the screenshot - does it help if you increase it?

[Ilmanine]

Is the simulator linked to the boat? Your resolution looks quite low from the screenshot - does it help if you increase it?

It isn't because the boat is animated to chop a little so I keyed the sim to follow the boat.

The problem was the simulator. It was bugged somehow, even moving him across the screen was a pain. It would barely move compared to any other geometry. I created a new sim and now is fine.


Is it possible to have something like this thumbnail? The boat starting on sim red and then transferring it to sim green and have a continuous simulation? That would help reduce simulation times a lot since the green part would only start when the boat was arriving.

[georgi.zhekov]

You can check how the cascade simulations work in here - https://docs.chaosgroup.com/display/PHX3MAX/Liquid+Grid

[Ivaylo Katev]

Is it possible to have something like this thumbnail? The boat starting on sim red and then transferring it to sim green and have a continuous simulation? That would help reduce simulation times a lot since the green part would only start when the boat was arriving.

simulation of moving boat in a huge static container is a big pain, better find a way to bind them in some way, for example use the simulator as base, animate the trajectory without any rotations (animate the position only), bind the boat to the simulator and animate only it's orientation (the movement is inherited from the simulator).

[Ilmanine]

So I've just done a smaller container, animated on the Y axis only to follow the boat and with 43M cells but still getting strange stuff happening. Would you be able to help me?

Bellow you can see frames 150, 250 and 500





Thank you