DigiCad 3D

DigiCad 3D’s Dynamic Attachment Feature

DigiCad 3D's Dynamic Attachment Feature

Dynamic Attachment feature allows you to view both the digitized drawing and the straightened drawing on screen at the same time. This means that if you're digitizing a photo of a building facade, for example, you can view the straightened elevation while you work. The feature is dynamic because the corrected elevation is updated in real time as you draw. You can also move the attach points and see the result immediately. This gives you total control while you work and more flexibility. The Dynamic Attachment feature is also used to transform pictures and to eliminate perspective distortion.

How to eliminate perspective distortion from a building photo

How to eliminate perspective distortion from a building photo

Follow the step bellows:
  • Import a photo
  • Set scale and unit of measure
  • Set the four origin attach points on the photo. The bottom-left point first, the top-left point second, after the top-right and the bottom-right. The Attach points are represented with red markers on the screen.
  • Open the Destination Attach points dialog from the Trasnfrom menu
  • Insert the real coordinates correspondent to the Destination Attach points. The reference system isn't important, it's sufficient that all the coordinates are in the same reference system (ex. the left corner of the building and the ground line). The Destination Attach points are represented with blue markers on the screen.
  • Select the picture
  • Choose Transform Picture from the Transform menu
  • Choose resolution, number of colors and Opaque or Transparent option
  • Click the Ok button
The process requires some time, depending on the picture size, the scale, the resolution and the size of the transformed picture. The message box shows the progress of the process

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

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

Yes, it is. This is when you do not have the precise measurements necessary for an exact operation – you have perhaps a few horizontal/vertical indications, which can help reconstruct an approximate situation. In this case, draw on the photo the lines you believe to be horizontal and vertical, put the 4 attach points on the photo and make a rough drawing of lines and attach points. Move the destination attach points until the horizontal and vertical lines are correctly aligned. When you have got the drawing right, you can transform the image. Another method is to draw a rectangle with the approximate final size of the drawing. Set graphically the Destination Attach points on the vertices of the rectangle and the Origin points on the corresponding points on the photo.

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.

What is DigiCad 3D Used For?

What is DigiCad 3D Used For?

Elimination of perspective distortion Mosaics of pictures and drawings Optical deformation correction Correction of scanned drawings and maps Georeferencing of maps Digitizing of photos, scanned drawings and maps Textures from photos Connection with large size digitizers Measurement of various geometrical data on pictures and drawings Regular- or irregularly curved surfaces can be straightened out Photographic plans can be created, based on mathematical digital terrain models Drawings and pictures can be straightened, or corrected, by snapping them to a series of attach points that correspond to real measurements taken on site, producing perfectly-scaled elevation. DigiCad 3D can also be used for mapping, to snap together pieces of site maps at the correct scale or digitize aerial photos. This makes it useful to architects, engineers, or anyone involved in building surveys or site analysis.

GeoTec B

In the case of a dam, what is the best way to consider the hydraulic pressure on the upstream face?

In the case of a dam, what is the best way to consider the hydraulic pressure on the upstream face?

Do you use a water bed which is above the ground surface (will this then compute the hydraulic load on the upstream face?) or do you use a trapezoidal load to represent the water?

It is possible to use two different methods depending on the result wanted.

First case:

We have a dam with water on one side (let's suppose on the right side). We want to verify the dam from right to left.


The best method is to consider a water stratum. A water stratum has 0 porosity, O cohesion coefficient, 0 Fi and 0 weight.

The water bed is on the top of this stratum.

The slide surfaces must continue inside the "water stratum" until the surface.

In this case Geo-Tec B considers the weight and the pressure of the water bed correctly.

Second case:

We have a slope in the water as on a lakeshore or seaside.


We want to verify the stability of the slope immerged in the water.

In this case it isn't possible to apply the first method and it's necessary to consider the water as a triangular or trapezzoidal load on the terrain (to consider the effect of the water on the terrain surface) plus the water bed (to consider the effect of the pressure of the water inside the terrain).

There is a special case to simulate a quick emptying of a lake. It's possible to simulate this case deleting the loads on the surfaces and maintaining the water bed on the top level. This because some time is needed for the water inside of the terrain to come out and in the meantime the internal pressure of the water corresponds to the top level of the water bed.

Nonio C

How does DXF import work in Nonio C?

How does DXF import work in Nonio C? Nonio C imports single points,  polygons (in DXF Polyline), faces, which it inserts as points to eventually be united by breaklines. It does not import other elements, such as lines, text, circles, etc. The primary use of DXF importation in Nonio C is to import contour lines from maps and complete 3D models. If you want to import a drawing for other purposes (such as to serve as the base document for a survey project), it's better to import the document first to another program, for example DigiCad 3D, then to Nonio C using Copy and Paste or Drag and Drop.

How can imported images be used?

How can imported images be used? Imported immages can be used for a number of objectives, among which some are listed below: - Digitalization of a map with contour lines - Superimposing a design on the survey - Superimposing a survey drawing on an aerial photo - Use of a design as a guide for infill or excavation - Comparison of the terrain model with the map - Comparison of the terrain model with map of property lines

How does Nonio C calculates the terrain model?

How does Nonio C calculates the terrain model? Nonio C constructs a mathematical surface connecting points with line segments to construct triangles. The generation of triangles is also regulated by the maximum distance for triangulation entered in the Preferences dialog box, which requires the program to search for and construct triangles only among points falling between the set distance. For any number of points, there are several possibile ways in which they may be joined by triangulation. If the general guidelines given above are followed and a reasonable maximum distance for triangulation set, the generated model should represent closely the actual terrain conditions. When there are certain discontinuities in the surface, a more detailed modeling process is required. In these situations, connections can be somewhat ambiguous, even for a simple case involving only four points. If automatic triangulation is used in situations like the one above, it can cause erratic results. Nonio C offers the user the ability to impose breaklines (representing lines of discontinuity, such as ditches, ridges, or streets) from which the triangulation can then be completed automatically. The user can locally correct the automatic triangulation and Nonio C recalculate the modified model immediately and automatically.

How does grahic import work in Nonio C?

How does grahic import work in Nonio C? Nonio C imports graphic images in several formats. The PICT import command uses QuickTime and can import all the graphic formats handled by the installed QuickTime Other methods to import an image in Nonio C are Copy and Past and Drag & Drop.

Domus Cad

Sharing the same mullion frame

How do I draw in doors and windows so that they share the same mullion frame? One method could be as follows:

  • Draw a large door opening equal to the width of the door base + the window base
  • Inside the door opening, draw a slab with a Reference Ht and Thickness equal to your sill height.
  • You can continue to add elements for window and door mullions to obtain the result you want.
It's not possible to draw walls inside windows and doors. If you need to do that, you have to draw them outside, group them in an object and drag the object over the window or door opening.

Roof slab up to a curved wall

How do you construct a roof slab, at say a 25 degree pitch, that is supported/buts up to a curved wall? (Sort of like a garret wall except in the opposite plane). I have thought of ways to do this, such as construct a rectangular slab and then cut it using the scissors tool and remove the unwanted section, but I don't know how. In Domus.Cad, there are two modeling tools which do this job easier and faster. The first allows you to cut or drill a slab with a curve/polygon. The second allows you to extrude a slab from a curve/polygon in any direction.

Modifying objects

what modifications can you make to an object - eg if an object is an "I "beam can you lengthen it, make it deeper ? what are the limitations The following modifications are directly applicable to an object: - Rotation, by mouse or by value - Deforming in x,y,z directions. By mouse and value in x and y direction. Only by value in the z direction - Stretching in x and y direction - Changing the color - Changing the reference Ht - Cutting (with the Scissors tool) Deforming re-scales the object proportionally in any point. Stretching modifies the object only where it is crossed by a reference line. This allows to change a part of an object while the rest remains unchanged.

Transparency artefacts

If I make the white background transparent, part of the white elements of construction also become transparent...and you can see cloudy bits through certain parts of the building. Can this be avoided? In this case place a little white rectangle between the background and the rendered image.

Layers which move

When I open my drawing, my previous layer 10 has moved to layer 9, and so on. Very strange. Maybe you executed the command Layer->Change Layer order? You can solve the problem by using this command again, following the steps below:

Let's suppose that you want the current Layer #9 on Layer #11 and vice-versa. Go on Layer 9 Execute the Layer->Change Layer order command Choose Layer 11
The current Layer 9 goes on Layer 11 and Layer 11 goes on Layer 9.

Windows-Mac Os compatibility

Is Domus.Cad cross-compatible between Windows and Mac? That is, can I save a file on my Windows laptop and then open that same file on my Mac? Yes, with File -> Export -> Drawing in Macintosh format command.


Is there a technique for adding skylights, i.e. windows on/through a roof or slab? There is a couple of ways of doing this: 1. Using any polygon or curve of any form to "punch" the roof or the slab (select the slab and the polygon on it and execute the command Process -> Punch Slab or click on the equivalent icon of palette #3) 2. Using the scissors to cut the slab into parts and cutting away one of them. Using the light of the sky as a light source (like a room with a window on the north side of the house, where the light of the sky lights the room) isn't possible - you must use one of the 3 types of artificial lighting or sunlight.

Connecting the walls to the roof 2

The User Guide example creates roof slabs, adds upper-level wall segments and then cuts each wall segment to fit under the slope of the roof. Roof design and modification is critical for me; my current project involves re-designing some roof sections on an existing home to accommodate architecture changes to the interior. Basically there are 2 ways to design roofs: as a serie of sloped slabs or as a complex hip roof. There are 2 procedures to adapt the top or the bottom part of the walls to the roofs. This procedures work on a single slab-roof, so if a wall is under 2 different slabs, it is necessary to cut it with the scissors tool and adjust each part to the corresponding slab-roof. You can modify the angle of the roofs and re-adjust the bottom or top parts of the walls in any moment. The height and reference height of the extremes of the walls can be modified also with the corresponding icons on the 3D Palette.

Duplicate elements

Can I draw a pillar, duplicate it at a distance of 2 mt, then duplicate these 2 pillars at the same distance apart to make 4 pillars, then 4 pillars to make 8, and so on. In Domus.Cad there are two different duplication modes: offset and parallel. If parallel operations are enabled (Edit menu), the element duplicates parallel to itself with the value set in the Offset parameters Dialog. If Offset operations are enabled, selected elements duplicate along the X, Y, Z and Angle offset parameters. With multiple duplications, elements duplicate relative to the last duplication. So, if you have a 2 mt X offset and duplicate a selection 10 times, you obtain a series of elements spaced at 2 mt.

How to use the scissors

How to use the scissors? Some general principles regarding the Scissors tool: - The Scissor applies only to the current element. For example, if the current active element is Segments, the scissors only cut segments. - You don't have to select anything. The command is applied to all elements in the current layer and the current type, whether they are selected or not. - You have to cut the whole element, not just a part of it. For example, if you have a polygon, you can't cut just one side, you must cut the whole polygon.

See all the Domus.Cad FAQ