Steve Cox Posted April 14, 2003 Share Posted April 14, 2003 I've been using 3D loci to simulate a centre of mass for a centre of gravity worksheet, but every so often the loci just disappear from the drawing and I have to re-insert them. I haven't managed to work out what is happening when they vanish. They are not part of a symbol, after I had so much trouble with nested symbols not updating in the worksheet. Where do loci go Steve using Mac OS 8.6 and VW 9.5.2 Quote Link to comment
Guest Posted April 14, 2003 Share Posted April 14, 2003 Are you turning any classes or layers on or off with visibility or layer/class options? Are you changing views? Quote Link to comment
Steve Cox Posted April 15, 2003 Author Share Posted April 15, 2003 Katie, I'm changing views constantly, because to calculate the centre of gravity in 3 dimensions I have to swap from top view to front view as there is no Z Centre function. I create the loci as class None, and I've done a Report that lists all the loci on every sheet, it doesn't find them. I tried the Custom visibilty tool to show all 3D loci, but that's made no difference Still puzzled Steve Quote Link to comment
Guest Posted April 15, 2003 Share Posted April 15, 2003 When placing a 3d loci, you can enter in the z height of the loci in the OIP. You should see an x, y and z data box. Quote Link to comment
Steve Cox Posted April 15, 2003 Author Share Posted April 15, 2003 Katie, I meant there is no Z centre function in the worksheet, so I have to view the drawing from the front, and run the worksheet to get the COG in the Z direction, then view the drawing from the top, and re-run the worksheet to get the COG in the Y direction. The Z placement in the OIP doesn't match the ruler in the front view, only the X and Y values correspond Quote Link to comment
Guest Posted April 16, 2003 Share Posted April 16, 2003 Are you typing in a z value when placing the 3d locus in TOp view? Is the z value higher than the rulers go in a front view? When you switch to a front view, can you do a "Fit to Objects" from the Page menu or the button in the scroll bar. Do you see the locus points? Quote Link to comment
Steve Cox Posted April 16, 2003 Author Share Posted April 16, 2003 Katie, answers to your questions: >Are you typing in a z value when placing the 3d locus in TOp view? No, I normally switch to front view and then adjust the Z position. I tried typing in the Z value, works OK, but with the same offset to the ruler. >Is the z value higher than the rulers go in a front view? No, it's about centre of the drawing >When you switch to a front view, can you do a "Fit to Objects" from the Page menu or the button in the scroll bar. Yes, both methods work >Do you see the locus points? Yes ( at least until they disappear ) Thanks Steve Quote Link to comment
Guest Posted April 16, 2003 Share Posted April 16, 2003 Next time the loci disappear, try to remember what steps were taken. That will help determine what is going on. They shouldn't just disappear without rhyme or reason. Quote Link to comment
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