Templot Club Archive 2007-2020
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posted: 15 Jun 2009 23:36 from: Martin Wynne
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richard_t wrote (in another topic): I thought that if I hit F9 slide, and then clicked on the "little window" I would be able to enter the same data that I was modifying - ie. the X, not the peg position. The same with Snake as well. I guess I don't understand what slide/snake are really doing, just the effect of what they do?Hi Richard, edit: video link updated There are 4 mouse actions which at first sight have a similar effect, but in fact there are significant differences between them. In many situations you can use whichever is the most convenient, but there are other situations where only the right one will do.
Slide is the less frequently used, and employs more complex maths than snake. If the main-road alignment is a transition curve, the transition alignment is locked to the template rather than the grid, and slides through the peg with the template. Slide doesn't require the peg to be on the main-road centre-line. If it isn't, the slide action is more complex than snake. For this reason "slide through peg" is most often used to slide along the turnout road. Roam constrains the template within its boundaries and moves the turnout within it, taking the peg with it. The roam mouse action is in effect adjusting the turnout approach length, and is therefore not available for plain track or half-diamond templates. The roam function is intended to be used when the template is already located between other templates, and the existing boundaries need to be maintained. Orbit also takes the peg with it. The template is rotated around the main-road radial centre. For transition curve templates you can choose which of the two radial centres is used, in a similar way to choosing which of the two radii is used for curving adjustments, by clicking the triangle symbol on the mouse action panel. For non-transition curve templates the effect is similar to snake, except that the peg moves with the template and the adjustment is displayed as an angle instead of the X dimension to the peg. If the template is straight, the radial centre is a long way away (about 60 miles!), so the fact that it is moving along a curve isn't at all obvious. The best way to understand these 4 functions is to experiment with them.  Try starting with an S-curve transition template and using each of them in turn. Here's a bit of video. Watch what happens to the peg and the radial centre marks in each case. You can see that the most often needed function is likely to be snake: http://flashbackconnect.com/Default.aspx?id=0OCZEp3uX2ExB_E_tGlGKA2 regards, Martin. |
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posted: 16 Jun 2009 07:54 from: richard_t
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Thanks Martin, those videos are very useful. Richard. |
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| Last edited on 16 Jun 2009 07:55 by richard_t |
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posted: 29 Apr 2020 13:16 from: Martin Wynne
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Following a post on RMweb, I have resurrected the ancient video in this old topic to FBR format. New video link in my previous post above. It's very small and may be easier to see in the Templot player. There should be a download link below the video on the above link. If you have Templot installed on this computer, the download should open in the player. cheers, Martin. |
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