# 11. Advanced: Tips & Tricks

## 11.1. Introduction

This section holds tips and tricks that don’t fit anywhere else, or are small enough that they don’t deserve their own tutorial.

## 11.2. Creating a Custom Filter

• Open disk_out_ref.ex2.

• Apply.

• In the Properties tab, Set Coloring to Temp.

• Select Clip filter.

• Set Clip type to Scalar. (The Scalars and Values don’t matter right now)

• Apply.

• Select Tools → Create Custom Filter.

• Name this filter ClipByScalar (IsoVolume).

• Take the default inputs.

• Take the default outputs.

• Select the clip (in the left window), and pull down the pull down menu for Property.

• Select Scalars.

• Hit the blue + sign.

• Do the same for Value and Inside Out.

• Finish.

• Now, delete the Clip filter in the pipeline browser.

• Select Filters → Alphabetical → ClipByScalar (sometimes incorrectly know as an IsoVolume filter).

• Turn Scalars to Temp

• Enter a Value of 400.

• Apply.

## 11.3. Temporal Statistics Filter

• Open can.ex2.

• Apply.

• Filters → Temporal → Temporal Statistics.

• Apply.

• Set Coloring to ACCL_average.

• Set Coloring to ACCL_maximum.

• Set Coloring to DISPL_average.

• You can now visually see average acceleration, maximum acceleration and average displacement of each cell.

• To see the ranges of these variables over the whole mesh, look in the Information tab.

## 11.4. Creating vectors from 2 or 3 scalars

• Open can.ex2.

• Apply.

• Select Filters → Common → Calculator.

• Build the vector equation using the iHat, jHat and kHat buttons on the calculator. For instance, this example will create a vector representing the acceleration in the X and Y plane.

• Set Result Array Name to ACCL-XY.

• Set Expression to ACCL_X*iHat+ACCL_Y*jHat.

• Set Coloring to ACCL-XY.

## 11.5. Mesh quality

• Select Sources → Alphabetical → Sphere.

• In the Properties tab, set Theta Resolution and Phi Resolution to 50.

• Apply.

• Select Filters → Alphabetical → Mesh Quality. and use defaults.

• Apply.

• Next, we want to only look at those cells that are below some threshold of quality.

• Filters → Common → Threshold.

• Choose Scalars of “Quality”, and Lower Threshold of 2.3 and Upper Threshold of 10.

• Turn visibility of Sphere1 on.

• Set Representation → Wireframe.

• Set Opacity to 0.5.

## 11.6. Backface styling

It is possible to change the backface style of a wire frame object. - Open can.ex2. - Apply. - Set Coloring to ids. - Set Representation → Wireframe. - In the Properties tab, Click Advanced. - Slide down a few pages until you find Backface Styling. - Set Backface Representation → Cull Backface.

## 11.7. Animating a static vector field

• If you have a vector field in your data, you can animate a static dataset.

• Our goal is to create a set of streamlines from a vector field, place points on this set of streamlines, and animate the point down the streamlines. We will also add glyphs to the streamline points.

• Open disk_out_ref.ex2.

• Apply.

• Click -X.

• Select Filters → Common → Stream tracer. (We are already streamtracing on V).

• Set Seed Type to Point Cloud.

• Unckeck Show sphere.

• Set Opacity to 0.3.

• Apply.

• Open View → Color Map Editor.

• Click Invert the transfer functions.

• Select Filters → Common → Contour.

• Contour on IntegrationTime.

• Apply.

• Select Filters → Common → Glyph.

• Set Orientation Array to v.

• Set Glyph Mode to All Points.

• Set Scale factor to 0.5.

• Set Coloring to v.

• Apply.

• In the Pipeline browser, hide Contour1, and show SteamTracer1 and Contour1.

• View → Animation View.

• Set Mode to Sequence.

• Set No. Frames to 100.

• Change the pulldown box next to the blue + to be Contour1.

• Click the blue +.

• Play.