| Workshop 3d | |
|---|---|
| Course | Arch 200c |
| Date | 2012/10/09 |
| Learning Objectives | This workshop will dive into drawing extraction as a means to utilize your 3d models in the generation of 2d drawings. We'll be moving from 3d to 2d and back again, all the while laying out various plans, sections, elevations and axons. There will be a brief Project B Pinup (30min) at the end of this session. |
| Agenda |
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| Uses Tool(s) | Rhinoceros |
Extraction Commands
There are a variety of ways to extract 2d line work from your 3d models. Some common ways will be discussed below.
Section
With 3d geometry selected, typing Section will allow you to create an artificial plane anywhere in your viewport simply by clicking any two points. This plane is your cutting plane and the section derived from it will be parallel to this plane. This means that if you wanted to cut your plan, you wouldn't draw your section plane in Top View because that would make a plane that cut through your space from the top down, essentially giving you a section, but you could do it in Front View, where your plane would slice all the way through your model at one consistent height.
Commonly, the Section command is not done ad hoc. You first make section planes that will guide your section planes and will help you split you model to generate additional 2d information that will help fill out your section or plan drawings.
Make sure that when you take your sections, you place them in order in the top view. The top view is the only view that can be exported to Illustrator.
Make 2D
Make 2D will help you get the base lines for elevations as well as site plans. It is also a great way to capture background information that has been 3d modeled.
The Make2D command captures linework in a selected viewport in relation to that viewport's construction plane and projects it as a two-dimensional drawing to the origin (0,0,0) of the X-Y plane.
Though Make2D is a versatile and extremely useful command, but there are several things to remember when working with this tool, mainly involving preparation.
Detail Appropriately
Consider the goal of your digital model. If you desire 1/4" scale drawings of your building, modeling the light-switches may not be efficient and will drastically slow your Make2D efforts. If you require a high degree of detail in your model, ensure that your use of layers allows you to "turn-down" the level of unwanted detail.
Simplify
Join all surfaces into polysurfaces insofar as possible - everywhere surface edges are concurrent, Rhino has to calculate two edges instead of one and see if there are overlaps.
Use the Right Stuff
Make2D does not create 2 D drawings from mesh objects, only surfaces, polysurface, lines, curves, and points.
For a more detail look at Make 2D, visit this tool part page: Make 2D
Laying out 2D Drawings
Aligning Drawings
When you take multiple sections and plans, it's helpful to line them up for registration. Often, you'll be able to carry dimensions and construction lines through multiple drawings. This is a time saver as well as a good way to begin thinking about how you might line up your final drawings. Ground planes are always a good anchor for lining up drawings, but any shared line can work.
Construction Lines and Section Lines
With proper alignment, your drawings can begin to speak to each other through construction lines, which will connect shared edges across the drawings. Any line or aspect from a drawing can be called out through a construction line that leads to other drawings and so on and so forth.
Your sections should always be referenced in either a plan or a site plan, which includes the labeling of your sections before you export. If you have a lot of drawings, they can get confusing without a labeling system. Commonly section lines are dashed and lighter than most other lines.
2D Details and their 3D consequences
Often you'll cut a section and start making it look nice by adding thicknesses, trimming unnecessary lines, and doing general clean up, but you'll also start adding details relating to your tectonic system, building assemblies and overall methods of construction. When you make a detail in 2D, moving back to 3d to incorporate the detail can help you continue to think in 3d space and can allow for increasing rendering detail.
Exporting to Illustrator
Once you have your section linework in place, select your drawing(s) and click "export selected" in the File menu bar. You can chose from a variety of options, but for drawings, we will chose either .dwg (Autocad Drawing File) or .ai (Adobe Illustrator). Both are editable in Illustrator, but the .ai file requires that you change size when you export. If your drawing was made specifically for a certain size, exporting directly to that size make sense, and the .ai file type would be best, but if you would like the ability to select the scale of the file when you open it in Illustrator, the .dwg will allow you to do that.
Moving back to Rhino after having made adjustments in Illustrator can be tricky. The layers from Illustrator will not be retained if you open it in Rhino, but the colors will be. This means, you could use "SelColor" in Rhino to make new layers based on their color, but if you have a line drawings in black with different weights as the only difference, you won't be able to distinguish the different layers any longer. In general, don't plan on going back and forth between Illustrator and Rhino. The changes you make to your drawings should be happening in Rhino, where Illustrator is just used for realizing the line weights and visual graphics.
Common Problems
"My drawing doesn't show up in Illustrator or is way off the artboard."
If this happens, try moving your geometry to the origin and export again. Rhino doesn't intuitively assume that the center of your selected area is supposed to be the center of the exported area.