Lesson 2

Summary

HTML revisions. Consolidation.

Coordinate systems, units/scales, geometric entities, visualization (perspective).

Modeling and editing of solids and surfaces (Platonic solids), use of the Autocad program.

EXERCISE 1

ex1
  1. Using autocad to construct a chess board.
  2. Start by changing the units for unitless and making two vertical vports so there’s 2 views of the drawing, one from the top and the other an isometric view, changing from 2d wireframe to conceptual.
  3. For the first cube, do a square whit a polyline whit the coordinates 0,0 /0,1/ 1,1/ 1,0, then to make the cube select the square and extrude whit 1 of height. Using the copy and mirror commands to do 3 more cubes and change the layers for 2 of them to create the chess pattern.
  4. To create the entire board, use the command array classics, selecting the objects, and changing for 2 the row offset and the column offset.

Exercise 2

ex2
  1. Use the same steps as in the previous exercise to make a square.
  2. With the command region select the square and copy all at the base points 0,0/ 1,0/ 2,0/ 3,0/ 1,1/ 1,-1 this will make a plan of the different cube faces. To “close” the cube use the command rotate to start building the solid with the help of the UCS command to change the origin of the reference.