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--- usage:other:turnout [2022-06-27 15:06]
56independent created (someone replace the ugly image, it's basically a placeholder)
+++ usage:other:turnout [2023-12-11 04:25] (current)
blockhead actually y45deg is symmetrical
@@ Line 1: / Line 1: @@
 ====== Turnout ======
-A **Turnout** (or **Point** or **Switch**) is an advtrains node that splits a track into multiple track (or combines two tracks into one).
+A **Turnout** (or **Set of Points** or **Switch**) is an Advtrains node that splits a track into multiple track (or combines two tracks into one).
 A screenshot of a junction using Turnouts is below:
@@ Line 6: / Line 6: @@
 {{:usage:other:t-junction.png?400|}}
-As you can see, there are many types of turnout. One type is a Y-turnout, which splits one track into two, one +15 degrees and another -15 degrees.
+As you can see, there are many types of turnout.The first type is the straight turnout, which is accessible by left-clicking using the trackworker on an ordinary straight track. This turnout keeps one track straight whilst adding another at 30° either to the left or right. You can see that 4 are used in the T-junction.
-The second type is the straight turnout, which is accessible by left-clicking using the trackworker on a normal, straight track. This turnout keeps one track straight whilst adding/subtracting 15 degrees to another. You can see that 4 are used in the T-junction.
+The second type is a Y-turnout, which splits one track into two, one +30° and another -30°. You can see 2 of these used in the T-junction.
-The third type, not photographed is the 3-way turnout, which acts like the y-turnout but with an additional third track in the middle for keeping straight.
+The third type, not pictured, is the 3-way turnout. The 3-way is much like the y-turnout but with an additional third track in the middle for keeping straight. This kind of turnout is exceedingly rare in real life - note the mechanism which moves 4 moveable blades instead of the ordinary two; so realism-focused players should generally try to avoid it.
+Advtrains track is available in rotations of 0°, 30°, 45° and 60° from the axis - approximately. The actual underlying system is that there is a track that travels 2 metres along one axis to every metre on the other axis, as well as 1:1 and only along the axis. Using trigonometry reveals the actual angles to be asin(1/2) ≈ 26° and atan(2) ≈ 63°. But the numbers 0, 30, 45 and 60 are always used to refer to those rotations.
+You will notice that since there is no constant difference of angle on the turnouts, that the 30° and 60° rotations of the Y-turnouts are not symmetrical. See the below picture.
+{{:usage:other:y-turnout-angles.png?400|}}

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