Category Archives: Drawing

“Yields circularity when preceded by its quotation” …

Posted on 15/04/2014 by dougaj4

yields circularity when preceded by its quotation. Today’s post takes us on a little circular tour of the internet, starting with: Grumpy Old Programmer (Mike Woodhouse) who returns from a long holiday from blogging to publish a nice little routine … Continue reading →

Posted in Computing - general, Drawing, Newton | Tagged , , , , , | Leave a comment

Daily Download 20: Section Properties

Posted on 06/10/2012 by dougaj4

The download spreadsheets today provide functions to find section properties of shapes either defined by coordinates or selected from a list of shape types.  The section properties found are: area, first and second moments of area about the X and Y … Continue reading →

Posted in Charts, Coordinate Geometry, Drawing, Excel, Maths, Newton, UDFs, VBA | Tagged , , , , | Leave a comment

Daily Download 16: Intersections, interpolations, and rotations

Posted on 02/10/2012 by dougaj4

There is only one download file today: http://interactiveds.com.au/software/IP2.ZIP , but it contains a wealth of different functions dealing with 2D and 3D geometry, including intersections of lines, circles and spheres, simple interpolation functions, and functions for rotating points in 2D … Continue reading →

Posted in Coordinate Geometry, Drawing, Excel, Maths, Newton, UDFs, VBA | Tagged , , , , , , , | Leave a comment

Daily Download 11: Perspective Projection

Posted on 27/09/2012 by dougaj4

The last of the daily downloads dealing with drawing is an extension of the drawing spreadsheet providing 3D perspective projection of wireframes defined by lists of 3D coordinates and connected points.  The spreadsheet was described in:Drawing in Excel 9 – … Continue reading →

Posted in Drawing, Excel, VBA | 1 Comment

Daily Download 10: Excel Digitiser

Posted on 26/09/2012 by dougaj4

See How to digitise a scanned image and Digitising logarithmic scales.  This spreadsheet provides a function to retrieve coordinates of lines traced over a scanned image. Download from: http://interactiveds.com.au/software/DigitGraph.zip Example images:

Posted in Drawing, Excel, Newton, UDFs, VBA | Tagged , , , , | Leave a comment