Move unit X distance towards unit2

[Null]

How to move unit1 distance X towards unit2

 

[Duckfarter]

set x1 = GetUnitX(u1)
set y1 = GetUnitY(u1)
set x2 = GetUnitX(u2)
set y2 = GetUnitY(u2)
set angle = Atan2(y2 - y1, x2 - x1)
set x1 = x1 + distance * Cos(angle)
set y1 = y1 + distance * Sin(angle)
SetUnitX(u1, x1)
SetUnitY(u1, y1)

 

[ThompZon]

It's also possible to do in GUI with angle between points for point of unit1 and unit2, then get point offset by "distance" from unit1 and move it there (note, a "stop" order will be issued if you use GUI-functions for moving unit to point). Also you'd need to clean up the 3 points involved in this.

 

[Dr Super Good]

If you know the distance between the units, you can then scale the difference in their X and Y to get the desired distance. This avoids using trigonometry and only relies on Pythagoras's theorem. Below is example pesudo code.

// move u1 100 units towards u2
move = 100
x1 = GetUnitX(u1)
y1 = GetUnitY(u1)
x2 = GetUnitX(u2)
y2 = GetUnitY(u2)
dx = x2 - x1
dy = y2 - y1
distance = sqrt(dx * dx + dy * dy)
scale = move / distance
SetUnitX(u1, x1 + scale * dx)
SetUnitY(u1, y1 + scale * dy)

The distance between the two points must be larger than 0, otherwise a division by 0 error/thread crash will occur. In the above example this means that u1 and u2 must be different units that must also be at different points on the map. Since this constraint can be difficult to assure naturally, it might be good to check if the calculated distance is 0 and if so then perform some sort of fall-back logic such as moving in an arbitrary direction to avoid the division by 0.