Saturday, February 8, 2014

3D Intro

3D scribble Page

Start in the old "Drafting and Annotations" workspace.

Draw a few 2D objects.



Click on "Top" and change your view to "SE Isometric".  




Play around with the view cube in the upper right hand corner.  Click on one of the faces, or on one of the corners to select a view.



Shift + hold center mouse wheel to rotate views.
hold down center mouse button to pan (like in 2D).

Test out the old 2D drawing tools in an isometric view (while the "Z" axis is displayed).  You will find that you cannot draw anything in the "z" direction except for a line.  All circles, arcs, etc. have to be created on the "xy" plane.  (In the future, in order to draw something on a different plane, you will first change the coordinate system.)

Use the line command to draw a 3D box with "ortho" on. 
Select a line
Ctrl + select center of line will copy and move it.   




Usually, you will not use the line command to draw in 3D. 


Right click on the grey tab bar at the top of the screen, and select "Show Tabs" then select "3D tools"




Click on the 3D tab, and have a look around.  Hold your mouse over each icon to see what it does.



Click the arrow under "box" in the modeling tab, and select a few of the 3D shapes.  If you hold your mouse over a shape for a second or two, it will eventually display instructions on how to create the shape (1st click, 2nd click, etc.)



Follow the instructions in the tooltip (box  that pops up if you hold your mouse over an icon) and create each of the 3D shapes under "Box" on your scribble page.



Once you have created a bunch of 3D objects, click in the upper left hand corner to change from a "Wireframe" view, to other views.  Click through all the different views to see what they look like.


Change the color in the "Home" tab by changing the color of the layer you are drawing in. 

Open up the "View" menu, and have a look around, try changing the "visual styles" from the ribbon.


Come back to the 3D tools, let's go through:
EXTRUDE
REVOLVE
LOFT
SWEEP
PRESSPULL
OFFSETEDGE
FILLETEDGE
SLICE
INTERFERE
SHELL
UNION
SUBTRACT
INTERSECT



Open up a fresh drawing, or Ctrl + a, delete.
EXTRUDE

Draw something in the xy plane.

type "EXTRUDE" in the command line, or select it from the 3D Tools ribbon.

Follow the directions in the command line:
EXTRUDE: Select objects to extrude or [Mode]:

You can extrude a line to create a surface:






Or extrude lines that have been "JOIN"ed together to create solid blocks.  (Join lines by typing "JOIN" in the command line, and then selecting the lines you want to join)


With "ORTHO" on, select the x, y, z coordinate system, rotate it to a new plane, and extrude some objects from a new direction.  Remember, you can only draw something (other than lines) in the "xy" plane.



Type "UCS" (User Coordinate System) in the command line, use "Face" to align the UCS with one of the faces you have created, then flip the X and Y around until you get the "xy" plane parallel to what you want to draw on. 

Draw a 2D shape on one of your surfaces.
Extrude the shape in the "Z" direction of your defined coordinate system.

Choose "World" to return your UCS to where it started.


Select object, and resize etc. with blue grips in wireframe mode:





Change to something other than wire frame, click on the object to select it, then use the object's coordinate system arrows to move object:




PRESSPULL

Draw a 2D shape on one of your surfaces by moving the UCS to align the xy plane with what you want to draw on.  Select inside the bounded area (not the line) to press and pull it.


Type "PRESSPULL" into the command line, or choose it from the 3D tools "Solid Editing" tools.  Play around with it until you are comfortable using it.



UNION


SUBTRACT



INTERSECT


REVOLVE



revolve 360 around x axis (previously drawn 10 above x axis):



REVOLVE

In this case, it is revolved around the y axis, and drawn starting at 0,0. 






LOFT

See description in the help for more info:

Loft connecting lines:




Loft connecting 2D shapes:




SWEEP:
Sweeps circles along a path.



Here I used subtract to create a pipe:


OFFSETEDGE + PRESSPULL





FILLETEDGE




SLICE
Select object to cut, specify cutting plane, keep both sides, then move one side away from the other.





INTERFERE
If two objects are overlapping, use the "interfere" command to see where they are overlapping, then the "subtract" command to remove the overlapping area from one of the objects:






SHELL:
Makes an object hollow with a specified wall thickness:


Sliced up so you can see it:















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