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springmeyer / arc.js

great circle routes in javascript
http://springmeyer.github.io/arc.js/
BSD 2-Clause "Simplified" License
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arcGenerator.Arc(100,{offset:10}),how do i set these two argument? #37

Closed JoyTiann closed 2 years ago

JoyTiann commented 5 years ago

very close line,for example [114.376688,30.4619172],[113.844623,30.237268],i use arcGenerator.Arc(100,{offset:10}) to produce a line, it seem like a straight line, it has not arc, so how do i set these two argument that i can produce a arc line? I am waiting for your reply,please.

JoyTiann commented 5 years ago

i notice arc.js from openlayer example(https://openlayers.org/en/latest/examples/flight-animation.html),but from the example ,we can see between two close point, it seem like a straight line, but i want to produce a arc line ,i guess it depends on arcGenerator.Arc(100,{offset:10}), so i want to know how do i set the two argument?

jgravois commented 2 years ago

sorry for the late reply.

this library doesn't provide a mechanism to exaggerate or suppress the bend of an arc between a start and end point. the greater the distance between an origin and destination, the more pronounced the arc will be when projected onto a mercator map.

closing, but happy to discuss further.