VERSION 2
DEMOINIT
ORIG 8.000 0.000 0.000
STRAIGHT 1 DEMO 1
	E 13.716667 4.466667 270.000000
	E 37.133333 4.466667 90.000000
	END
STRAIGHT 2 DEMO 1
	E 13.216667 8.383333 240.802413
	E 27.383333 16.300000 60.802413
	END
REDRAW
RESET
MESSAGE
Two straight tracks can be joined by selecting the two endoints.  The selected endpoints will be those closest to the cursor when the track is selected.

First, we will select Easements None and then select Join
END
STEP
PARAMETER misc cmdEasement
PARAMETER easement val 0.0
BIGPAUSE
PARAMETER easement ok
COMMAND JoinTrack
STEP
MESSAGE
_____________________________________________________

Now we select two points on the tracks
END
MOUSE 1 16.583 10.417
MOUSE 2 16.583 10.417
MOUSE 4 16.583 10.417
MOUSE 1 17.083 4.583
MOUSE 2 17.083 4.583
MESSAGE
_________________________________________

A connecting track is drawn between the two tracks.  Notice how it moves as the cursor is dragged along the second track.
END
STEP
MOUSE 3 17.167 4.583
MOUSE 3 21.917 4.583
BIGPAUSE
MOUSE 3 21.917 4.583
MOUSE 3 14.833 4.250
MESSAGE
_________________________________________

Note that two tracks are extended if you move past the end of the track.
END
STEP
MOUSE 3 14.750 4.250
MOUSE 3 9.000 4.000
MESSAGE
_________________________________________

Notice what happens if you drag past the intersection points of the two tracks.
END
STEP
MOUSE 3 8.833 4.000
MOUSE 3 -0.667 2.750
MESSAGE
_________________________________________

This is probably not a very useful thing to do.
END
BIGPAUSE
MOUSE 4 -0.667 2.750
MESSAGE
=========================================
END
REGRESSION START 11 - join straights - simple
STRAIGHT 1 0 0 0 0 DEMO 2
	T4 3 -0.667000 4.466667 270.000000 0 0.0 0.0 0.0 0.0 0 0 0 0.000000 
	E4 37.133333 4.466667 90.000000 0 0.0 0.0 0.0 0.0 0 0 0 0.000000 
	END
STRAIGHT 2 0 0 0 0 DEMO 2
	T4 3 0.206517 1.112893 240.802413 0 0.0 0.0 0.0 0.0 0 0 0 0.000000 
	E4 27.383333 16.300000 60.802413 0 0.0 0.0 0.0 0.0 0 0 0 0.000000 
	END
CURVE 3 0 0 0 0 DEMO 2 -0.667000 2.676023 0 1.790644 0 0.000000 0.000000
	T4 2 0.206517 1.112893 60.802413 0 0.0 0.0 0.0 0.0 0 0 0 0.000000 
	T4 1 -0.667000 4.466667 90.000000 0 0.0 0.0 0.0 0.0 0 0 0 0.000000 
	END
REGRESSION END
STEP
CLEAR
PARAMETER misc cmdUndo
MESSAGE
Now we will do this with Cornu Easements  

First, we will select Easements Cornu and then select Join
END
STEP
PARAMETER misc cmdEasement
PARAMETER easement val -1.0
BIGPAUSE
PARAMETER easement ok
COMMAND JoinTrack
STEP
MESSAGE
_____________________________________________________

Now we again select two points on the tracks
END
MOUSE 1 16.583 10.417
MOUSE 2 16.583 10.417
MOUSE 4 16.583 10.417
MOUSE 1 17.083 4.583
MOUSE 2 17.083 4.583
MESSAGE
_________________________________________

A connecting cornu is drawn between the two tracks.  Notice how it behaves as the cursor is dragged along the second track.
END
STEP
MOUSE 3 17.167 4.583
MOUSE 3 21.917 4.583
BIGPAUSE
MOUSE 3 21.917 4.583
MOUSE 3 14.833 4.250
MESSAGE
_________________________________________

Note that either tracks can be extended if you move past the end of it.
END
STEP
MOUSE 3 14.750 4.250
MOUSE 3 9.000 4.000
MESSAGE
_________________________________________

Notice this time what happens if you drag past the intersection points of the two tracks.
END
STEP
MOUSE 3 8.833 4.000
MOUSE 3 -0.667 2.750
MESSAGE
_________________________________________

This is more useful because you can move the other end as well.
END
STEP
MOUSE 4 -0.667 2.750
MOUSE 1 16.583 10.417
MOUSE 2 16.583 10.417
MOUSE 3 26.900 15.800
MOUSE 4 26.900 15.800
MESSAGE
_________________________________________

You can add a pin to constrain the Cornu Curve to pass through it.
END
STEP
MOUSE 1 16.400 12.680
MOUSE 2 16.400 12.680
MOUSE 3 20.000 10.500
MOUSE 4 20.000 10.500
MOUSE 8200 20.000 10.500
MESSAGE
=========================================
END
REGRESSION START 12  - join straights cornu
# ../share/xtrkcad/demos/dmjnss.xtr - 151
STRAIGHT 1 0 0 0 0 DEMO 2
	T4 5 -0.667000 4.466667 270.000000 0 0.0 0.0 0.0 0.0 0 0 0 0.000000 
	E4 37.133333 4.466667 90.000000 0 0.0 0.0 0.0 0.0 0 0 0 0.000000 
	END$SEGS
STRAIGHT 2 0 0 0 0 DEMO 2
	T4 4 26.802098 15.975192 240.802413 0 0.0 0.0 0.0 0.0 0 0 0 0.000000 
	E4 27.383333 16.300000 60.802413 0 0.0 0.0 0.0 0.0 0 0 0 0.000000 
	END$SEGS
CORNU 4 0 0 0 0 DEMO 2 26.802098 15.975192 60.802413 0.000000 0.000000 0.000000 20.000000 10.500000 227.332778 50.468495 -14.204474 47.609607 
	T4 2 26.802098 15.975192 60.802413 0 0.0 0.0 0.0 0.0 0 0 0 0.000000 
	T4 5 20.000000 10.500000 227.332778 0 0.0 0.0 0.0 0.0 0 0 0 0.000000 
	W3 0 0.000000 26.802098 15.975192 26.164180 15.618707 25.528914 15.255902 24.922701 14.847824
	SUBSEGS
	C 0 0.000000 -26.451833 39.457674 -7.252719 326.668083 4.748448
	SUBSEND
	W3 0 0.000000 24.922701 14.847824 24.316487 14.439746 23.739315 13.989295 23.188205 13.509400
	SUBSEGS
	C 0 0.000000 -17.691771 34.842861 0.198961 318.794523 7.099752
	SUBSEND
	W3 0 0.000000 23.188205 13.509400 22.085986 12.549608 21.074671 11.490540 20.000000 10.500000
	SUBSEGS
	C 0 0.000000 -65.215805 66.730294 -35.041479 315.224174 2.888986
	S 0 0.000000 20.796534 11.253132 20.000000 10.500000
	SUBSEND
	END$SEGS
CORNU 5 0 0 0 0 DEMO 2 20.000000 10.500000 47.332778 50.468495 -14.204474 47.609607 -0.667000 4.466667 90.000000 0.000000 0.000000 0.000000 
	T4 4 20.000000 10.500000 47.332778 0 0.0 0.0 0.0 0.0 0 0 0 0.000000 
	T4 1 -0.667000 4.466667 90.000000 0 0.0 0.0 0.0 0.0 0 0 0 0.000000 
	W3 0 0.000000 20.000000 10.500000 19.318543 9.871891 18.615306 9.263690 17.848611 8.743033
	SUBSEGS
	C 0 0.000000 18.778714 7.078653 24.126404 136.521306 8.482677
	SUBSEND
	W3 0 0.000000 17.848611 8.743033 17.081916 8.222376 16.252171 7.790276 15.373060 7.496902
	SUBSEGS
	C 0 0.000000 10.145390 12.091979 17.097082 145.429938 15.701023
	SUBSEND
	W3 0 0.000000 15.373060 7.496902 14.493949 7.203529 13.567965 7.050061 12.641194 7.049336
	SUBSEGS
	C 0 0.000000 8.670868 12.623232 15.720186 161.510300 18.371006
	SUBSEND
	W3 0 0.000000 12.641194 7.049336 11.714424 7.048612 10.789413 7.199895 9.904422 7.475023
	SUBSEGS
	C 0 0.000000 9.217472 12.673408 16.266752 180.200242 17.281760
	SUBSEND
	W3 0 0.000000 9.904422 7.475023 9.019431 7.750151 8.175230 8.147494 7.376550 8.617616
	SUBSEGS
	C 0 0.000000 12.069936 13.578894 18.972049 197.723979 13.197787
	SUBSEND
	W3 0 0.000000 7.376550 8.617616 6.577870 9.087738 5.823862 9.629917 5.087234 10.192309
	SUBSEGS
	C 0 0.000000 23.166639 19.337296 28.457820 211.083842 6.876168
	SUBSEND
	W3 0 0.000000 5.087234 10.192309 3.613980 11.317093 2.191863 12.536086 0.541165 13.379184
	SUBSEGS
	S 0 0.000000 5.087234 10.192309 2.880741 11.891379
	C 0 0.000000 -16.933355 -7.345233 -1.605583 27.757576 9.391814
	SUBSEND
	W3 0 0.000000 0.541165 13.379184 -0.284188 13.800738 -1.164915 14.124119 -2.079569 14.273530
	SUBSEGS
	C 0 0.000000 -8.978407 -3.634267 5.430753 9.971577 17.742051
	SUBSEND
	W3 0 0.000000 -2.079569 14.273530 -2.536896 14.348235 -3.001703 14.379353 -3.464645 14.358998
	SUBSEGS
	C 0 0.000000 -6.758837 -3.186180 7.605900 357.638745 11.784606
	SUBSEND
	W3 0 0.000000 -3.464645 14.358998 -3.927586 14.338644 -4.388609 14.266672 -4.833991 14.138748
	SUBSEGS
	C 0 0.000000 -5.903451 -3.218328 8.460688 344.116575 13.492114
	SUBSEND
	W3 0 0.000000 -4.833991 14.138748 -5.279372 14.010825 -5.708973 13.826821 -6.106104 13.588042
	SUBSEGS
	C 0 0.000000 -5.320524 -3.374332 9.022365 329.106732 14.970290
	SUBSEND
	W3 0 0.000000 -6.106104 13.588042 -6.503235 13.349262 -6.867684 13.055650 -7.182439 12.715565
	SUBSEGS
	C 0 0.000000 -4.925324 -3.573613 9.363671 312.886078 16.171430
	SUBSEND
	W3 0 0.000000 -7.182439 12.715565 -7.497194 12.375479 -7.762017 11.988983 -7.963009 11.571453
	SUBSEGS
	C 0 0.000000 -4.672075 -3.755935 9.539505 295.779781 17.047949
	SUBSEND
	W3 0 0.000000 -7.963009 11.571453 -8.164001 11.153923 -8.300973 10.705552 -8.366415 10.246808
	SUBSEGS
	C 0 0.000000 -4.537825 -3.874548 9.602610 278.161379 17.552270
	SUBSEND
	W3 0 0.000000 -8.366415 10.246808 -8.431857 9.788063 -8.425704 9.319225 -8.348802 8.862263
	SUBSEGS
	C 0 0.000000 -4.516107 -3.895246 9.611300 260.452854 17.636670
	SUBSEND
	W3 0 0.000000 -8.348802 8.862263 -8.271900 8.405300 -8.124342 7.960494 -7.915133 7.547020
	SUBSEGS
	C 0 0.000000 -4.616507 -3.797243 9.633913 243.124710 17.253123
	SUBSEND
	W3 0 0.000000 -7.915133 7.547020 -7.705924 7.133547 -7.435288 6.751601 -7.117962 6.413912
	SUBSEGS
	C 0 0.000000 -4.870580 -3.573517 9.754490 226.696048 16.353154
	SUBSEND
	W3 0 0.000000 -7.117962 6.413912 -6.800636 6.076224 -6.436897 5.782850 -6.043374 5.538171
	SUBSEGS
	C 0 0.000000 -5.350011 -3.229346 10.088321 211.734607 14.887748
	SUBSEND
	W3 0 0.000000 -6.043374 5.538171 -5.649850 5.293492 -5.226774 5.097437 -4.788767 4.946181
	SUBSEGS
	C 0 0.000000 -6.219072 -2.778742 10.831473 198.856757 12.807357
	SUBSEND
	W3 0 0.000000 -4.788767 4.946181 -4.350759 4.794925 -3.897938 4.688337 -3.440233 4.615986
	SUBSEGS
	C 0 0.000000 -7.915867 -2.239129 12.440198 188.727410 10.062079
	SUBSEND
	W3 0 0.000000 -3.440233 4.615986 -2.524822 4.471284 -1.593777 4.466669 -0.667000 4.466667
	SUBSEGS
	C 0 0.000000 -14.358484 -1.395250 18.828097 179.869603 8.318495
	S 0 0.000000 -1.362572 4.469650 -0.667000 4.466667
	SUBSEND
	END$SEGS
REGRESSION END
STEP