Hello All,

In a bid to further my knowledge of the capabilities of H9, I have started going through the video tutorials available on this site. One of the recent ones I went through was ‘creating a simple gas solver’.

Whereas I followed along with this tutorial with no problems and understood what was going on with most of it, some aspects of it confused me a little. I don't wish to criticize the tutorial as I learned a lot about getting vector fields into DOP's for the use of manipulating and acting upon other geometry, but I was confused at what the introduction of the scalar field did to the simulation.

I understand that it was introduced to ‘calm down the movement of the vector field’ but I don't really understand how it had this effect. I know a scalar is sort of like a multiplier, so I mean, was it introduced to add the control of being able to multiply up and down the resultant vector values from the vector field? For example if at one voxel the sampled vector returned 40,45,76.43, is the scaler field multiplying that down to a vector of a smaller magnitude to ‘calm down’ its effect?

It would be nice if someone could explain exactly what the scaler field is doing.

Many thanks!

The Scalar Field DOP creates a Scalar Field data that can be attached to simulation objects and manipulated by solvers. A Scalar Field is an axis-aligned box divided into individual voxels.

Each voxel is giving a floating point number. The meaning of these numbers could vary - a signed distance field would store the distance to the surface and a density field would store the amount of density at the location

So that would depend on the data going into input 2.