Example using 2D images
Using the Gigapixel David dataset at the URL: http://atlantis.sci.utah.edu/mod_visus?dataset=david
we can apply scripting using some of the predefined filters/scripts.
For example from the original image:
Using a "2D/Emboss" script you will get something like the following:
Examples using a vector field
In the following examples we will use a vector field from a large scale combustion dataset. You can open this dataset with your ViSUS Viewer using "Open URL" and this address: http://atlantis.sci.utah.edu/mod_visus?dataset=lifted_time
A Volume Node for a vector field will visualize a volume rendering as following (using a "Gamma" palette):
Since the data has 3 components the default visualization uses the 3 components as RGB channels.
If we want to evaluate and visualize the squared magnitude of this (three-dimensional) vector field the user can simply insert a scripting node with the following script:
output= ((1.0*input)*input) + ((1.0*input)*input) + ((1.0*input)*input);
input field represent the input data that enter the scripting node, the output represents the result of the computation.
The output will be a scalar field that will be rendered as following:
Another example using a vector field is to compute a 2D Linear Integral Convolution (LIC), this can be done using the following simple script:
where the second and third parameters of the lic function are the vector's components that we want to use for the computation.
The result will be like the following (using a "Banded" palette) adding this script to a Slice Node: