post samples

The post samples module is used to visualize:

• Sampling locations and the values of the properties in .apdv files
• The lithology specified in a .pgf, .lsdv, .lpdv or .geo files
• The location and values of well screens in a .aidv file

Along with a representation of the borings from which the samples/data were collected. The post samples module has the capability to process property values to make the posted data values consistent with data used in kriging modules. Data can be represented as spheres or any user specified glyph. The sampling locations may be colored and sized according to the magnitude of the property value, and labels can be applied to the sampling locations with several different options.

Each sampling location can be probed for data by holding the Ctrl button and left-clicking on the sample location.

When you read any of the supported file types, the module automatically selects the proper default settings to display that data type. However, some file formats can benefit from different options depending on your desires and the quantity of data present.

Below is the Properties window for post samples after reading a .PGF file. Note that “Samples” and “Screens” are selected.

The result in the viewer is below.

If we turn on Well Labels and Sample Labels (with some subsetting to declutter), the viewer shows:

The post samples module can also represent downhole geophysical logs or Cone Penetration Test (CPT) logs with tubes which are colored and/or sized according to the magnitude of the data. It can display nonvertical borings and data values collected along their length, and can also explode borings and sample locations to show their correct position within exploded geologic layering.

When used to read geology files, post samples will place surface indicators at the top (ground) surface and the bottom of each geologic layer that are colored according to the layer they depict. When a geology file (.geo or .gmf) is exploded without using geologic surface input from gridding and horizons there will be surface indicators at the top and bottom of each layer. You may color the borings by lithology.

Ports

Properties

Glyph Settings

Sample Settings

Subsetting Settings

Collapse To 2D

Geology Settings

Time Settings

Screen Settings

Boring Tube Settings

Color Tube Settings

Label Settings

explode and scale

The explode and scale module is used to separate (or explode) and apply a scaling factor to the vertical dimension (z-coordinate) of objects in a model. explode and scale can also translate the fields in the z direction, and control the visibility of individual cell sets (e.g. geologic layers).

Ports

Properties

Explode And Scale Settings

plume shell

The plume shell module creates the external faces of a volumetric subset of a 3D input. The resulting closed volume “shell” generally is used only as a visualization of a plume and would not be used as input for further subsetting or volumetric computations since it is hollow (empty). This module creates a superior visualization of a plume as compared with other modules such as plume passing to external faces and is quicker and more memory efficient.

Ports

Properties

Data Processing

Sequence Settings

External Faces

intersection shell

The intersection shell is a powerful module that incorporates some of the characteristics of plume shell, yet allows for a large number of sequential (serial) subsetting operations, just like intersection.

To get the functionality of (the now deprecated) constant shell module, you would turn off Include Varying Surface.

Because this module has “intersection” in its name, it allows you to add any number of subsetting operations.

Each operation can be “Above” or “Below” the specified Threshold value, which in Boolean terms corresponds to:

• A and B where both the A & B operations are set to Above or
• A and (NOT B) where the A operation is set to above and the B operation is set to Below.

However the operator is always “and” for intersection modules. If you need an “or” operator to achieve your subsetting, you need the union module.

This module creates an efficient and superior visualization of a plume that can be sent directly to the viewer for rendering. The intersection shell module outputs a specialized version of a sequentially subset plume that is suitable for VRML export for 3D printing to create full color physical models.

For output to 3D printing, please jump to the Issues for 3D Printing topic.

Without intersection shell it is very difficult if not impossible to create a VRML file suitable for printing, especially with complex models.

intersection shell is the module that can create an ISOSURFACE. In other words, a surface (not volume) representing part(s) of your plume.

It has two (+) toggles which control the visibility of a plume “shell”.

In general a plume external shell has two components: that portion which is exactly EQUAL to the Subsetting Level, and that portion which is greater than the Subsetting Level.

When both toggles are on (default) the plume is:

If you display only the Constant Surface (component 1) you get this:

If you display only the Varying Surface (component 2) you get this:

Ports

Properties

Subsetting Values

Data Processing

External Faces

change minmax

The change minmax module allows you to override the minimum and/or maximum data values for coloring purposes. This functionality is commonly needed when working with time-series data. For example, the user can set the minmax values to bracket the widest range achieved for many datasets, thus allowing consistent mapping from dataset to dataset during a time-series animation or individual sub-sites.

This way 100 ppm would always be red throughout the animation, and if some times did not reach a maximum of 100 ppm, there would be no red color mapping for those time-steps.

NOTE: The Clamp toggle actually changes the data. Use with caution as this will change volumetrics results.

Ports

Properties

Nodal Data Ranges

Cell Data Ranges

band data

band data provides a means to color surfaces or volumetric objects (converted to surfaces) in solid colored bands.

band data can contour by both nodal and cell data.

This module does not do subsetting like plume shell or plume. It is used in conjunction with these modules to change the way their output is colored.

Ports

Properties

volume renderer

volume renderer directly renders a 3D uniform field using either the Back-to-Front (BTF) or Ray-tracing volume rendering techniques. The Ray-tracing mode is available to both OpenGL and the software renderer. The BTF renderer, which is configured as the default, is available only in the OpenGL renderer.

NOTE: This module and its rendering technique are not supported in C Tech Web Scenes (CTWS files).

The basic concept of volume rendering is quite different than any other rendering technique in EVS. volume renderer converts data into a fuzzy transparent cloud where data values at each point in a 3D grid are represented by a particular color and opacity.

Ports

Properties

opacity by nodal data

opacity by nodal data provides a means to adjust the opacity (1 - transparency) of any object based on its data values using a simple ramp function which assigns a starting opacity to values less than or equal to the Level Start and an ending opacity to values greater than or equal to the Level End. The appearance of the resulting output is often similar in appearance to volume rendering. opacity by nodal data converts data into partially transparent surfaces where data values at each point in a grid are represented by a particular color and opacity.

NOTE: Any module connected after opacity by nodal data MUST have Normals Generation set to Vertex (if there is a Normals Generation toggle on the module’s panel, it must be OFF).

Ports

Properties

slope and aspect

The slope and aspect module determines the slope and aspect of a surface. The slope is the angle between the surface and the horizon. The aspect is the cardinal direction in degrees (rotating clockwise with 0 degrees being North) that the slope is facing.

Ports

Properties

select single data

The select single data module extracts a single data component from a field. select single data can extract scalar data components or vector components. Scalar components will be output as scalar components and vector components will be output as vector components.

Ports

Properties

import wavefront obj

The import wavefront obj module will only read Wavefront Technologies format .OBJ files which include object textures which are represented (included) as a single image file. Each file set is actually a set of 3 files which must always include the following 3 file types with the same base file name, which must be in the same folder:

1. The .obj file (this is the file that we browse for)
2. A .mtl (Material Template Library) file
3. An image file (e.g. .jpg) which is used for the texture. Note: there must be only ONE image/texture file. We do not support multiple texture files.

This module provides the user with the capability to integrate complex photo-realistic site plans, buildings, and other 3D features into the EVS visualization, to provide a frame of reference for understanding the three dimensional relationships between the site features, and characteristics of geologic, hydrologic, and chemical features.

Ports

Properties

Texture Options

Transform Settings

Export Settings