webguit Posted November 5, 2009 Share Posted November 5, 2009 Hi I uploaded my roof. I need to extract those indicated parts from roof. How I should do this? I made this in two parts with polyline and extruded them and then put together. I tried many ways but nothing worked! Please help! Tarmo Quote Link to comment Share on other sites More sharing options...
SPARKY77 Posted November 5, 2009 Share Posted November 5, 2009 one way would be to extrude a triangle shape under the roof and then subtract that triangle from the opposite roof Quote Link to comment Share on other sites More sharing options...
ReMark Posted November 5, 2009 Share Posted November 5, 2009 Webguit, did you get your problem solved? Quote Link to comment Share on other sites More sharing options...
webguit Posted November 5, 2009 Author Share Posted November 5, 2009 No, I did triangle with polyline and extruded but subtract didn´t work. I also tried this before posting the problem, maybe I am just doing something wrong. Is there any other way? Quote Link to comment Share on other sites More sharing options...
webguit Posted November 5, 2009 Author Share Posted November 5, 2009 I just upload the roof, maybe somebody can do this roof.dwg Quote Link to comment Share on other sites More sharing options...
ReMark Posted November 5, 2009 Share Posted November 5, 2009 Starky gave you good advice. I know as I tried his method and it worked for me. First, you have to be careful with the triangles you create. Second, you have to make sure you're subtracting the triangles from the correct roof. Quote Link to comment Share on other sites More sharing options...
ReMark Posted November 5, 2009 Share Posted November 5, 2009 Here's the proof. I used 3Dpolylines to construct the triangles. Images are of the roofs before and after subtraction (upsidedown views included too). I did not bother to include the part where I extruded the triangles. Quote Link to comment Share on other sites More sharing options...
Secretagdan Posted November 5, 2009 Share Posted November 5, 2009 You do need to make sure that your solids are intersecting when you use the subtract command. I just tried it and it worked just fine. Another option would be to used the slice command, but it would take more steps than was was mentioned to do above. Quote Link to comment Share on other sites More sharing options...
webguit Posted November 6, 2009 Author Share Posted November 6, 2009 I have no ideas what I am doing wrong, i uploaded my step by step roof. What is wrong? Tnx Quote Link to comment Share on other sites More sharing options...
ReMark Posted November 6, 2009 Share Posted November 6, 2009 What did you do wrong? My guess is that you subtracted the triangle from the wrong roof. Think about it. The roof you are subtracting from will have the extruded triangle of the other perpendicular roof subtracted and not its own triangle. Look at my example above. The blue roof has the extruded triangle made for the orange roof subtracted from it and the orange roof has the extruded triangle for the blue roof subtracted from it. Understand? You have to pay attention to the command line prompts and your geometry. Quote Link to comment Share on other sites More sharing options...
SPARKY77 Posted November 6, 2009 Share Posted November 6, 2009 Remark from the example it loks as if he is sabtracting the right roof. are you doing the selection in the correct order Quote Link to comment Share on other sites More sharing options...
SPARKY77 Posted November 6, 2009 Share Posted November 6, 2009 select the roof you want the subtraction from and then the part you want subtracted Quote Link to comment Share on other sites More sharing options...
webguit Posted November 6, 2009 Author Share Posted November 6, 2009 Yess , I got it! Thank you very much! Quote Link to comment Share on other sites More sharing options...
ReMark Posted November 6, 2009 Share Posted November 6, 2009 Tis a fine day after all! You're entirely welcomed. Glad to hear you got it solved. Quote Link to comment Share on other sites More sharing options...
SPARKY77 Posted November 6, 2009 Share Posted November 6, 2009 Happy to help Quote Link to comment Share on other sites More sharing options...
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