fourleafclover Posted December 21, 2011 Posted December 21, 2011 (edited) Hey everyone, I am currently working on a 3d model which can be seen attached. All I d like to do is subtract so that when using the HIDE tool I am able to see inside the model. For some reason I am not able to carry this task out. Hope someone can help, thanks. Model house_21-12-11_1.dwg Edited December 21, 2011 by fourleafclover Quote
ReMark Posted December 21, 2011 Posted December 21, 2011 I would have drawn the floor plan then used the PressPull command to pull the walls up to give them height. No subtraction required. How come some "walls" are so thin? Your exterior wall is 10 units thick. You have a "cavity" at 5 units thick. Then you have an interior wall (around the perimeter) of 10 units thick. Could you explain why that is? Quote
ReMark Posted December 21, 2011 Posted December 21, 2011 OK, I think I have it figured out. Just to be safe copy the exterior wall and the first "cavity" to one side. Subtract the cavity from the exterior wall. You should be able to confirm that you can look inside the house. Then copy the next "cavity" and the interior walls to the other side. Subtract the interior walls from the cavity. Now reassemble these two and you should have your house. Quote
ReMark Posted December 21, 2011 Posted December 21, 2011 Is this what you are attempting to do? Quote
fourleafclover Posted December 22, 2011 Author Posted December 22, 2011 Hi ReMark, yes your last post with the image is what I am aiming to do. From this I am going to continue with the model adding windows etc. Also I think I have got confused with trying to make a cavity on the model. How did you manage to get the model to the stage shown in the image? thanks. Quote
ReMark Posted December 22, 2011 Posted December 22, 2011 I mentioned my steps in the post previous to the one with the image in it. Now I could have done it without making any copies of your geometry but I wanted to see what you started with while I was making my attempt at subtracting. Quote
fourleafclover Posted December 22, 2011 Author Posted December 22, 2011 Ok I see. I have now managed to do what you are showing in your image which is great. But do you know whether there is anyway of preventing layers combining when subtracting? This is happening when I am adding in window openings resulting in the whole model becoming the 'external wall' layer. Thanks again for your help. Quote
ReMark Posted December 22, 2011 Posted December 22, 2011 You have to do your unions or subtractions on the layer whose color you wish to retain. Another option is to use a lisp routine that takes care of this automatically for you. Trouble is I forgot where I saw the routine posted. My bad. Quote
fourleafclover Posted December 22, 2011 Author Posted December 22, 2011 yeah I have got the layer selected when subtracting, but all it keeps doing is changing the 'internal walls' into the 'external walls' layer Quote
ReMark Posted December 22, 2011 Posted December 22, 2011 Both walls are going to end up being the SAME color depending on which wall you pick FIRST. Unless you want to do TWO subtractions; one for the outer wall and one for the inner wall so as to retain the TWO different colors. Re: the lisp routine I was talking about previously. It turns out it was for the EXTRUDE command not the SUBTRACT command and it is called "Extrude to original layer. Sorry. Quote
fourleafclover Posted December 22, 2011 Author Posted December 22, 2011 Bingo! Great solution, thanks for your help. Quote
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