Issue description
when you extend one of the point of a shape very far, the whole shape get scalded down.
this behaviour feels counter intuitive and make it unable to create huge shape or big island
Reproduction steps
before extension:

while dragging the point you can see that the other point are being scaled down

when releasing mouse the extended point change place

Game version and build number
v0.6.4b (b340)
Operating system
Windows