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[WIP] Change vector density when zooming #49

Closed kjordahl closed 9 years ago

kjordahl commented 9 years ago

This change sets a number of vectors to show when at minimum zoom, and quadruples the number at each increased zoom level, as long as there are enough vectors available. In practice, this doesn't span the entire zoom range, so at higher levels the density will decrease.

Performance is an issue at higher zooms. Perhaps something can be done to avoid spending time updating vectors outside the frame?

Closes #7.

kjordahl commented 9 years ago

closing this, I think #51 is the way forward (though it still has some issues).