Using autoshape freeforms is a very easy way to duplicate object outlines from pictures. It is convenient to create a freeform and once created, its vertices (points) can be edited with without difficulty. Aditional points can be inserted and others can be deleted. This is a tutorial about a series of macros which allow the extraction of freeform vertex coordiantes to a worksheetContinue Reading

This tutorial will introduce the reader to creating simple drawings in Excel by using the “Freeform” auto shape. Later on, we will be able to convert this data in x-y-z vertex information for various models by using a macro. [sociallocker][/sociallocker] Drawing in Excel – part #1 – an introduction tocreating freeform type autoshapes – On this blog we will soon need toContinue Reading

This is another basic demo investigating the feasibility of using anaglyph wireframes to plot scientiffic data. Open the attached worksheet and with your 3D glasses on, watch the chart. The data is a dynamic temperature map obtained from a 2D heat transfer model in a metal plate. The heat model is complete and you can run it with various parameters. You canContinue Reading

This is a basic demo investigating the feasibility of using anaglyph sprites to plot scientiffic data. Open the attached worksheet and with your 3D glasses on, watch the chart. The data results are various temperature maps obtained from a 2D heat transfer model in a metal plate. You have 4 different selectable mapps there but you can also invert the pattern using the “Flip” button. IContinue Reading

In this section, a joystick is added to the model which controlls the  yaw rate and the pitch rate (not the angles!) of the stereoscopic cube. This joystick was used before in a dedicated tutorial and in the flight simulator tutorial. Its importance in future models can not be underestimated, hence I decided to cover this virtual device again. Use your 3D glasses whileContinue Reading

Reach out for your 3D goggles because this is a representation of the Cosmos through the eyes of a 5-year old. The model displays a few objects at various depths and move two of them back and forth on a chart to demonstrate the stereoscopic effect. Though very simplistic it is an excellent example of anaglyph stereoscopy in action showing youContinue Reading

This is the final part of the anaglyph stereoscopy tutorial. This part deals with the prectical implementation of the concepts and formulas discussed before to create a 3D cube. You need 3D glasses to notice the stereoscopic effect. The PDF erroneously claims this is part #3 of the tutorial, whereas this is actually part #4 (it’s a typo in theContinue Reading

This section of the tutorial gives few more real life applications of the stereoscopic vision and also derives the stereoscopic 3D-2D perspective conversion formulas. These formulas are based on the approximation that the that both right and left eyes observe the same v-coordinate. Excel anaglyph stereoscopy #3 – 3D-2D perspective conversion formulas by George Lungu – While the previous section introduced theContinue Reading

This tutorial explains the basic principles of creating and displaying anaglyph pictures. Excel anaglyph stereoscopy #2 – how to split the image by George Lungu – The previous section showed an improvement in the practical implementation of spreadsheet multiplication, namely based on the associativity of matrix multiplication the three elementary rotation matrices were combined in a composite rotation matrix whichContinue Reading

I made a stereoscopic model in October last year, however, choosing the wrong colors (red and blue on a black background, the effect was very weak (if any). This series was suggested to me last week by one of the guests here on the website, Don L. (thanks Don!), who sent me his stereoscopic cube. I opened the model, put onContinue Reading

This section displays the landscape on a 2D scatter chart and also upgrades the joystick chart by adding a dial behind the joystick image. This technique of using a stack of a back chart to display dial sprites and a front chart with transparent background to display various control devices, indicator needles and text will extensively be used in thisContinue Reading

This section finishes the macro analysis and continues with the conversion of the u-v 2D formula array into a chart-able 1D array. It also adds two columns to the chart-able array, a masking condition for each triangle and masked u-coordinate which will throw out of the visible portion of the chart any shape which has a minimum of one vertexContinue Reading

This section explains the spreadsheet  implementation of the perspective rotation and translation formulas within the Present array. It also shows the implementation of the 3D-2D conversion formulas within the Past array, then it goes on to presenting the VBA macros used (the Reset and JoyStick macros). [sociallocker][/sociallocker] A Basic Flight Simulator in Excel #5 – the worksheet implementation of theContinue Reading

This section explains the top level functionality of the model, it also allocates the data and formula arrays needed for manipulating the scene image. The roll rate, pitch rate and throttle formulas are implemented in the worksheet. [sociallocker][/sociallocker] A Basic Flight Simulator in Excel #4 – creating the initial, current and previous landscape matrices by George Lungu – This section startsContinue Reading

This section deals with a simple method of creating the appearance of scene movement during the flight. Beside reviewing standandard rotation and translation formulas described before on this blog, the presentation begins to explain how to apply numerical-like methods to create a live and interactive model.   A Basic Flight Simulator in Excel #3 – calculating the scene rotation and translation as a resultContinue Reading