Module: Isosurface (Regular) ()

Description:

This module computes an isosurface within a three-dimensional scalar field with regular Cartesian coordinates.

Very high-resolution data sets can be downsampled to reduce the number of polygons being produced. In addition, an internal polygon reduction method is provided that merges certain triangles of the original triangulation. This way, the number of triangles can be reduced up to 50%. A second independent scalar field may be connected to the module. This field determines how the isosurface is colored. If no color field is connected to the module the isosurface has constant color.

Press the Apply button to start the computation.

Connections:

Data [required]
The scalar field defined on a regular 3-dimensional grid.

ColorField [optional]
Arbitrary scalar field which is mapped onto the isosurface using pseudo-coloring.

Colormap [optional]
The colormap is used for pseudo-coloring the isosurface.

Texture [optional]
The texture field must be an HxUniformColorField3 2D slice. When connected, the texture is mapped onto the surface geometry along the texture normal axis. A transformation can be applied to the data to change the texture projection axis and texture coordinates scale. Note that texture projection override pseudo-color mode.

PointProbe [optional]
If this port is connected to a Point Probe module as isovalue the value at a certain point within the scalar field will be chosen. For details see Point Probe.

ROI [optional]
Connection to a module defining a region of interest.

Ports:

Draw Style

The draw style port is inherited from class View Base. For a description of this port see there.

Colormap

In case a colormap is connected to the isosurface module, this colormap will be shown here. If no colormap is connected to the module the port's default color is used. To change this color, click into the color bar with the left mouse button. This will bring up the color selection dialog. To connect the port to a colormap, use the popup menu under the right mouse button. See also Colormap.

Buffer

To use this port, you must first create a dragger. To do so, type the command Isosurface showBox. Then the buffer port must be enabled explicitly with the command Isosurface buffer show. For a detailed description see the View Base documentation.

Threshold

Determines the value used for isosurface computation. The slider is automatically adjusted to cover the whole range of data values.

Options

If the compactify toggle is set, up to 50% less triangles will be produced, but it results in a slightly shifted surface. This port further allows you to enable downsampling (see below).

Sample Factor

This port only appears if downsampling is enabled. It allows you to specify a sample factor for each of the three main axes. The factors determine how many of the original grid points in each direction will be merged into one.

TextureWrap

Wrap mode used for the texture projection on the surface. There are two wrap modes: Repeat: The texture is repeated outside its 0-1 texture coordinate range. Clamp: Clamps texture coordinates to lie within 0-1 range. This port is hidden if there is nothing connected to the Texture connection port.