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🔍 using spatial indexing to determain which features to render

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Michael Straßburger 2016-09-27 14:53:47 +02:00
parent 06528f488d
commit cfe063cf2e
4 changed files with 14 additions and 14 deletions
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5
README.md
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@ -27,7 +27,7 @@ No web browser around? No worries - discover the planet in your console!
## Behind the scenes ## Behind the scenes
### Libraries ### Libraries
#### Mastering the console #### Mastering the console
* [`x256`](https://github.com/substack/node-x256) for finding nearest xterm-256 [color codes](https://en.wikipedia.org/wiki/File:Xterm_256color_chart.svg) * [`x256`](https://github.com/substack/node-x256) for converting RGB values to closest xterm-256 [color code](https://en.wikipedia.org/wiki/File:Xterm_256color_chart.svg)
* [`term-mouse`](https://github.com/CoderPuppy/term-mouse) for mouse handling * [`term-mouse`](https://github.com/CoderPuppy/term-mouse) for mouse handling
* [`keypress`](https://github.com/TooTallNate/keypress) for input handling * [`keypress`](https://github.com/TooTallNate/keypress) for input handling
@ -55,7 +55,7 @@ No web browser around? No worries - discover the planet in your console!
* [x] support for point labels * [x] support for point labels
* [x] dynamic decluttering of labels * [x] dynamic decluttering of labels
* [x] centering text labels * [x] centering text labels
* [ ] clipping fix when x<0 after repositioning * [x] clipping fix when x<0 after repositioning
* [ ] multi line label * [ ] multi line label
* [ ] label margin to avoid POI overlap? * [ ] label margin to avoid POI overlap?
* [ ] translatable raster fonts * [ ] translatable raster fonts
@ -81,7 +81,6 @@ No web browser around? No worries - discover the planet in your console!
* [x] accurate mouse drag&drop * [x] accurate mouse drag&drop
* [x] handle console resize * [x] handle console resize
* [x] styling * [x] styling
* [ ] turn this into a [`blessed-contrib`](https://github.com/yaronn/blessed-contrib) widget
## License ## License
#### The MIT License (MIT) #### The MIT License (MIT)

2
src/Canvas.coffee
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@ -2,7 +2,7 @@
termap - Terminal Map Viewer termap - Terminal Map Viewer
by Michael Strassburger <codepoet@cpan.org> by Michael Strassburger <codepoet@cpan.org>
Simple pixel to barille character mapper Canvas-like painting abstraction for BrailleBuffer
Implementation inspired by node-drawille-canvas (https://github.com/madbence/node-drawille-canvas) Implementation inspired by node-drawille-canvas (https://github.com/madbence/node-drawille-canvas)
* added support for filled polygons * added support for filled polygons

17
src/Renderer.coffee
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@ -41,14 +41,8 @@ module.exports = class Renderer
layers: layers:
housenum_label: minZoom: 1.5 housenum_label: minZoom: 1.5
building: minZoom: 3.8 building: minZoom: 3.8
place_label: true
poi_label: minZoom: 3 poi_label: minZoom: 3
road: true
water: true
admin: true
isDrawing: false isDrawing: false
lastDrawAt: 0 lastDrawAt: 0
@ -97,10 +91,17 @@ module.exports = class Renderer
@notify "rendering #{layer}..." @notify "rendering #{layer}..."
scale = Math.pow 2, @zoom scale = Math.pow 2, @zoom
if @config.layers[layer].minZoom and @zoom > @config.layers[layer].minZoom if @config.layers[layer]?.minZoom and @zoom > @config.layers[layer].minZoom
continue continue
for feature in @features[layer].tree.search(minX: 0, minY: 0, maxX: 4096, maxY: 4096) box =
minX: -@view[0]*scale
minY: -@view[1]*scale
maxX: (@width-@view[0])*scale
maxY: (@height-@view[1])*scale
for feature in @features[layer].tree.search box
#@notify "rendering #{feature.data.id}"
@_drawFeature layer, feature.data, scale @_drawFeature layer, feature.data, scale
_drawFeature: (layer, feature, scale) -> _drawFeature: (layer, feature, scale) ->

4
src/Termap.coffee
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@ -31,7 +31,7 @@ module.exports = class Termap
lng: 12.096956 lng: 12.096956
zoom: 2 zoom: 2
view: [0, 0] view: [0, 100]
scale: 4 scale: 4
@ -66,7 +66,7 @@ module.exports = class Termap
_resizeRenderer: (cb) -> _resizeRenderer: (cb) ->
@width = (process.stdout.columns-1) >> 1 << 2 @width = (process.stdout.columns-1) >> 1 << 2
@height = process.stdout.rows >> 2 << 4 @height = Math.ceil(process.stdout.rows/2) << 4
@renderer.setSize @width, @height @renderer.setSize @width, @height