refactor to use less gl calls
add point line distance utility functions
add build instructions
Merge branch 'master' of git@github.com:hjanetzek/VectorTileMap.git
extract Layer drawing utilities from RenderOverlay into BasicOverlay
move uploadOverlay to BasicOverlay
no need for synchronized in ExtrusionOverlay
limit framerate
simplify logic
make TileManager non static
use 0x80 as stencil buffer CLIP_BIT
update license headers, formatting
check range in blendColors
clear stencil after each tile
keep track of GL_BLEND state: GLState.blend(enable)
- reuse element Tag arrays
- use previous elements' RenderInstructions when tags and zoom match
simplify fillPolygons
start render early
clear ItemizedOverlay
formatting