Nodes - Hybrido Meshes (HM)
RealFlow provides two types of Hybrido meshes: standard and OpenVDB:
- Both technologies share almost exactly the same parameter sets and therefore they are explained and discussed together.
- The main difference between these types is filtering. In addition to the common mesh filters, OpenVDB provides very fast → volume filters to shape the mesh.
- OpenVDB meshes are also created faster than their standard counterparts.
Under → "HyFLIP Displacement" you will learn how to create Hybrido meshes. The following table explains a few basic terms in conjunction with Hybrido meshes:
| Core fluid | This is the → HyFLIP simulation's main body of water. Every mesh vertex carries a "core fluid" attribute that is used by the → “Core Smoothing” filter to create a smoother surface:
|
|---|---|
| Splash | Here we talk about parts of the core fluid which behave like splashes, e.g. when an object hits the fluid. Every mesh vertex carries a "splashity" attribute that is used by the → “Splash Thinning” filter to create thinner splashes:
|
| Displacement | This structure adds smaller waves and ripples to the surface and is also known as → ocean statistical spectrum. The Hybrido mesh engine's displacement filters are used to control how the displacement vanishes in certain parts of the mesh ("attenuation"). |
| Attenuation | There are circumstances where the displacement waves are simply not wanted: Imagine a thin splash, or fast moving parts of the fluid with cresting waves. The attenuation settings allow you to fade and finally remove the small waves based on four properties: speed, vorticity, height, and splashity. |
| Projection Plane | The → HyFLIP domain's viewport representation shows a square with four cubes. The plane's size defines the displacement's scale and tiling, and can also be used to clip unwanted parts of the mesh. When the → "Open boundaries" option is active all mesh parts below and outside the projection plane will be removed. |
| Boundaries | The displacement can be tiled and with the settings of the → "Boundaries" section it is possible to blend the core fluids displacement and the extension tiles in order to get a seamless ocean surface. |
Build Mesh and Build Mesh Sequence
The first method is to build a single mesh. In most cases, this feature is used to create a test mesh from a single frame. It is your starting point for adjusting the mesh's individual parameters. In many cases you will do this for several frames until you have found working settings. Click on this button from the "Mesh" shelf:
The → interactive meshing mode is a quick way to refine your test meshes:
In the next step, the entire simulation range is meshed. To do this, rewind to the frame from which the meshing process should start, and press the “Build Mesh Sequence” button from the “Mesh” shelf. RealFlow will now go through the frames and create the meshes one by one (the appearing warning message can be ignored):
