Can anyone help me?
I am working on a project (using autocad 2011) that has a building with a two way sloping roof. What i am trying to do is draw a shape in 'solids' that replecates the shape of this building.
Is it possible to create a six faced shape with 4 different vertical co-ordinates. a flat bottom, 4 different shaped sides, and with top face sloping from east to west, and north to south?
Cheers
Brian.
I'm no 3D expert, but while you wait for one to chime in, it seems to me this is just a "box" (elongated, rectangular), with its corners pushed and pulled a bit to get the right dimensions along the edges. Start there (box), and start grip-editing.
...or this.
Loft surface line-to-line
Extrude base
Slice with surface.
The CADWhisperer YouTube Channel
Draw 2 triangles using 3DPOLY command, LOFT, and then UNION
Or draw them like JD's way, then SLICE it with 3 points.
In that 2nd demo, what did you do to the box (or to settings) that allowed the four "top" corners to be grip-edited independently?
dmfrazier wrote:
In that 2nd demo, what did you do to the box (or to settings) that allowed the four "top" corners to be grip-edited independently?
CTRL + Click on a Vertex, Edge, or Face of any solid or surface to activate SubObject Selection.
Yes, I am able to get the corners to "light up", but when I move one corner down, the adjacent top corner moves with it, even though I have not selected it. So I can only make the "roof" slope in one direction. Also, I do not see a line appear on the top surface going from one top corner to the corner diagonally opposite, as your demo shows. It's as if your "box" has extra "edges" or vertices.
Make sure you're clicking right on the corner (vertex)... it sounds like you're selecting a edge, which will light up (and move) all the red dots at the same time.
Actually, there's a little options menu that flies out when I select the vertex. I had to click "Allow Triangulation" for it to work as your demo showed.
(Demos are great and can make things look so easy, but often the keys are in the underlying settings and options.)
Thanks for the additional tips.
My mistake Although I have '12, '13, & '14 installed, 2011 is my preferred version, which doesn't have that extra menu. I didn't know it was even there.
i'm gonna sound pretty dim here but i can only draw my poly lines on the x and y axiis whist following the instructions on demo 2?
Do i need to adjust my viewport settings in some way to be able to use the z axis?.
Im just working in a sw viewport and i suspect i need to something more drastic to make this possible.
Thanks for your patience everyone.
Brian
That's the age old dilema of UCS vs View in a 3D environment. To draw your shape using polylines / Loft as shown in the animation, you have to draw the "left" and "right" sides, so you have to change the UCS to either "Left" or "Right". (PLines can only be drawn in the X/Y axis). Remember that the Viewport controls in the canvas and the Ribbon will change the UCS and the "view" (Top/Bottom/Left/Right/Front/Back) while the Viewcube changes the "view" without changing the UCS
I recommend finding some reading material / tutorials on managing the UCS in AutoCAD.