Summary

Edit -> View Settings...
Render View Options -> General -> Use Parallel Projection : checkbox true : Apply

Set view direction to +X

Edit -> Select Cells On

Filters -> Data Analysis -> Extract Selection : Apply

Filters -> Alphabetical -> Transform : set Scale X to 1e-5 : Apply

Filters -> Data Analysis -> Integrate Variables : Apply

Change from Point Data to Cell Data

Front area calculation

This is one way to calculate front area in ParaView.

Make shure parallel projection is activated.


Edit -> View Settings...
Render View Options -> General -> Use Parallel Projection : checkbox true : Apply

Make shure you watch the front area.


Set view direction to +X

Select cells facing towards you.


Edit -> Select Cells On

Drag a rectangle around the object.

Extract selected cells.


Filters -> Data Analysis -> Extract Selection : Apply

Compress in view direction.


Filters -> Alphabetical -> Transform : set Scale X to 1e-5 : Apply

Cells are now flat and possible to calculate area on.


Selected cells are now flat.

Integrate cell variables.


Filters -> Data Analysis -> Integrate Variables : Apply

Switch to cell data.


Change from Point Data to Cell Data

Front area ready.


Now we have the projected area. The front area is 0.12 m2 for this diameter 0.4 m sphere