Before we begin patterning of a structure we must take various aspects into account:
State of the programWe have already mentioned that WinTess3 is a program “all-in-one” type suite with very clear three states of the program. In order to make a pattern, it is necessary that the program is in the state of Patterning, so we need to update using the drop-down from top toolbar. If we open a file saved previously, WinTess3 remembers what state the program was in when it was saved and puts us in it. Now whether we are designing a certain structure is very possible that we have started with form finding. Once it is done, we wish to pass to the stage of calculation or directly to the patterning. If we update the drop down from top toolbar we get a message which reminds us that:
- The pattern depends on the initial form of the membrane. If we come from form finding, the initial form of the membrane is what you have. In fact, it is the final form of the Form finding phase.
- If we come from the calculation phase, what we see on screen is the final form (deformed). The program will automatically return it to the initial form, i.e., before the deformations caused by the loads (even before the prestressing of membrane). The results of the calculation will be lost, unless:
- WinTess3 suggests storing the results of each phase in a separate file. If we are coming from the calculation phase, WinTess3 suggests _calc in the end of the filename in saving filename.
- Define the effective width of the membrane
- Decide where and how patterns will be placed on the membrane
- Attach the end points of the patterns along the perimeter
- Draw geodesic lines
- Define the pattern triangles
- Check patterns
- We have created the triangles in bad order. The pattern is clearly deformed.
- The pattern does not fit within the width of the membrane. Do not forget the necessary margin (offset) for the welding seams.
- The number of points (triangles) used to generate the pattern is insufficient and, therefore, the perimeter of the pattern is not a smooth curve but a broken line.