BillR Posted October 22, 2016 Share Posted October 22, 2016 I imported a .dwg file of a ship from SketchUp, converted it to 3D polys, and changed some of the colors. It looks fine, but whenever I try to scroll in close, the model starts to disappear. (See attached image.) The odd thing is that is only does this when I’m in a perspective (narrow, normal, wide) viewing mode – it doesn’t happen when it is set to orthographic. Quote Link to comment
barkest Posted October 23, 2016 Share Posted October 23, 2016 Not sure why you have imported it as a DWG and then converted it to 3D polys? Explode in SketchUp so there are no components or groups (check in the Outliner). Make into a single component (purge all to clean up) and save as .skp. Best to save as the version that is 1 less than the VW version you are using so save as 14 if you are using VW 2015 and so on. Import the .skp file into VW and make sure you check the box that imports colours as textures. I only say this because you model seems to have solid colours rather than SU materials. Should work fine. Quote Link to comment
barkest Posted October 23, 2016 Share Posted October 23, 2016 Here is a SketchUp file that I cleaned up using the above method. I did a quick check in VW without issues. battleship.skp Quote Link to comment
BillR Posted October 24, 2016 Author Share Posted October 24, 2016 I really appreciate your response, but it didn’t answer my questions. Perhaps I was not being clear: I wasn’t asking “What’s a better way to do this?”, I was asking “Why didn’t this work?” I didn’t import as a SketchUp file because I have only the Fundamentals version, and it is not equipped with that function. In any event, even if I had another version that COULD import SketchUp files, I would still want to know why importing the .dwg file did not work – an important functionality, SketchUp notwithstanding. Also, there is the matter of why the ship will display properly in Orthographic but not in Normal Perspective. Still odder, when I render the ship, it is all there, but if I switch back to OpenGL after a rendering, part of the ship will disappear. By the way, I should point out that I have done this same procedure with FAR more complicated SketchUp drawings, and it worked fine. I'm baffled by why it is not working in this case. Does anybody know why this is happening? Quote Link to comment
AlanW Posted October 24, 2016 Share Posted October 24, 2016 Hi, I find this sometimes, the program will cut off this model just as you see it. No reason that I could find except I suspect that the graphics card is chucking a wobbly, so a restart usually fixes it. Even have to resort to a computer restart to fix it sometimes. Quote Link to comment
rDesign Posted October 24, 2016 Share Posted October 24, 2016 (edited) I think this has more to do with OpenGL's perspective near clipping plane than a graphic card fault. (I've had this happen in SketchUp as well). This explains why the clipping goes away in an orthogonal view. Edited June 14, 2018 by rDesign Quote Link to comment
Christian Fekete Posted October 24, 2016 Share Posted October 24, 2016 I have seen this in sketchup also and I remember reading that it is related to how close you are from the model in perspective view. Is VW doing the same thing now is surprising. Could this be inherited from SKP? Quote Link to comment
Kevin McAllister Posted October 25, 2016 Share Posted October 25, 2016 3 hours ago, Christian Fekete said: I have seen this in sketchup also and I remember reading that it is related to how close you are from the model in perspective view. Is VW doing the same thing now is surprising. Could this be inherited from SKP? C4D does the same thing as well, but it has a setting you can adjust to fix it..... its directly related to how close the model is to the editor "camera" in perspective view. Kevin Quote Link to comment
Andy Broomell Posted October 25, 2016 Share Posted October 25, 2016 I don't remember specifically, but I seem to recall an old thread discussing this issue. I feel like the root cause had something to with either A) the model being really far away from the document origin, or B) something to do with cropped/uncropped perspective, where the model was perhaps zoomed really far out when the Document Settings were set to cropped, and this was somehow affecting the view when the Document Settings were set to uncropped. Might be worth playing around with. Quote Link to comment
BillR Posted October 26, 2016 Author Share Posted October 26, 2016 Hey, thanks for the answers everyone! I never really figured out the problem (assuming that there even IS one), but I worked around it by switching to Orthographic when doing close-up work. Quote Link to comment
snakandala Posted August 15, 2018 Share Posted August 15, 2018 I encountered this problem when my model was really far away from the origin! Quote Link to comment
Alt+F4 Posted August 16, 2018 Share Posted August 16, 2018 Is your model reasonably scaled? I've found that very small or very big models (as they sometimes decide to be when imported as DWGs) also sometimes show this behaviour. Quote Link to comment
Markvl Posted August 16, 2018 Share Posted August 16, 2018 This could be a distance from origin problem. Try placing the model at 0,0. Quote Link to comment
Steve Clarkson Posted November 9, 2018 Share Posted November 9, 2018 I seem to have just started having this issue. It appears to have started randomly, but maybe I did something. I've moved everything close as possible to origin, and tried both cropped settings. No change. It's extremely annoying as I would like to get very close to an object. The entire drawing is quite large, a factory about 400' by 100'. Quote Link to comment
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