DigiCad 3D FAQs - Interstudio

What is DigiCad 3D Used For?

DigiCad 3D’s Dynamic Attachment Feature

How to eliminate perspective distortion from a building photo

Is it possible to eliminate perspective distortion from a photo without any measured point?

How DigiCad 3D’s Attach Functions from files Work

How DigiCad 3D's Attach Functions from files Work

igiCad 3D has various Attach functions, from the File menu, that allow you to "snap together" different drawings by designating a certain number of corresponding Attach Points. A two point attachment is the simplest and allows you to connect two drawings by designating an origin point and reference point (two Attach Points). When the two drawings are attached, or "snapped" together, they are automatically scaled, fitting one drawing to the other. Four and five point attachments are used for maps and architectural surveys using photographs. In the latter case, you can obtain a perfectly scaled elevation using one or more photos of the building face. The common denominator in each of these cases is the use of two documents (the source document - a digitized photo, for example - and the resulting scaled document). For the survey of an architectural facade, the work phases would be as follows: - import the image (drawing or photo) - designate at least 4 Attach Points - digitize all the necessary parts of the image (maybe certain sections aren't needed) - save the work - open a new document - insert the 4 corresponding Attach Points with their real measurements (the four corners of a window, for example, or the four corners of the facade - it depends on the scale of the detail wanted) - Attach the previously saved document using the Attach command. With the new Dynamic Attach feature you can do the same thing using just one document instead of two, controlling the work dynamically and reducing your work time. With the new procedure, the steps are as follows: - import the image - designate the 4 Origin Attach Points and insert their corresponding real measurements in the Dinamic Attach Points - digitize the image and/or transform the picture or parts of the picture. Using this procedure you can view the image you're digitizing AND the corresponding corrected elevation image at the same time, allowing any errors to be corrected immediately. If you move the Attach Points, everything is simultaneously scaled accordingly. The Dynamic Attach procedure doesn't mean, however, that the old "static" procedure is obsolete. In more complex cases where several photos are used (some general, others of details), it is more convenient to work on several separate documents, then snap them all together afterward.