With 2D object-based systems, objects in a drawing can be repeated, mirrored, snapped to, turned on and off, etc., but it is still a drawing which is being edited. With 3D modeling systems, a 3D representation is created (using many of the same principles as 2D object-based drawing), and then various 2D pictures are generated by taking different views of the 3D representation. The third dimension also introduces many concepts which are meaningless in 2D drawing, like hidden line removal, facetting, set operations, shaded images, light sources and ambient light, etc.
- To introduce the student to a 3D modeling system and to the concepts such systems are based upon. The student should understand how such systems differ from other object based systems.
- To emphasize the differences between various types of 3D modeling systems, such as surface modelers, solid modelers, ray tracers, etc.
- To continue producing projects which can be incorporated into a final project.
- To continue to develop a familiarity with microcomputers.
Produce a 3D model based on your earlier 2D AutoCAD drafting project. The model should incorporate at least a couple elements created using surface modeling techniques, and at least a couple elements created using solid modeling techniques. You will most likely want to use solid modeling techniques for the majority of the project, but you are free to use either, so long as there are at least 2 elements of each type.
Somewhere in your project, there should be some type of element (e.g., hatching, text on a sign, a mural, etc.) that was created in a non-horizontal reference plane , using the UCS command.
The model should include some sort of ground plane, or optionally, a more complicated ground surface or solid showing site topography.
You should plot at least 2 8-1/2x11 perspective views of your model (e.g. bird's-eye views or interior views) on the laser printer. At least one of these views should be an interior perspective. The laser prints you hand in should have hidden lines removed for clarity. Hand in the laser prints in class Tuesday, June 8.
Be prepared to discuss the assignment in class. What did you find enjoyable or confusing about working in 3D. Were you able to do what you intended? Were you able to take advantage of tools or modes in order to help with your work? Do you wish that certain aspects of AutoCAD were different? Also be prepared to comment on whether or not you think 3D modeling is useful, and if so, for what (presentation, schematic visualization, etc.).
Projects will be evaluated based on the extent to which your models and images demonstrate technical mastery of the tools, and good judgment in their application. Use of the tools to create a 3D presentation is being evaluated -- you will not be graded on quality of the architectural design. Completing the minimum requirements for the assignment will earn 14 out of 20 points. As always, neatness counts. Points will be counted off if you have lines which do not meet neatly, edges in the middle of what should be smooth wall planes, stray lines that do not seem to belong, etc. Points will also be subtracted if the assignment is turned in late.
Attention to detail, appropriate use of tools, additional work, good composition, and so forth can merit up to 6 more points. This can include unusually careful work like meticulous matching of hatching patterns to surfaces, or carefully making sure forms fit together right. It can include judicious selection of sweeping, mesh, or set operation commands to best represent difficult-to-model forms. It can include additional work, like modeling furniture, trim, doors and windows, hardware, etc. (Feel free to create your own 3D wblocks, and share these with classmates, but be sure to indicate on your laser prints which blocks are your own creation, and who created the others). It is also better if your views are well-composed to create a deliberate effect or accentuate a particular aspect of the design, instead of being haphazard views of whatever happened to be in the vicinity of wherever the camera happened to wind up. As always, grading will favor mastery of a variety of techniques more than widespread use of a few functions, although the model should seem complete.