mirror of
https://github.com/rastapasta/mapscii.git
synced 2024-11-21 15:43:08 +01:00
🏃 implementing polyline simplification, label buffering, cleanup
This commit is contained in:
Michael Straßburger
parent
caea4c6aec
commit
ae65f95e24
@ -4,9 +4,9 @@
|
||||
|
||||
The Console Vector Tile renderer - bäm!
|
||||
###
|
||||
tilebelt = require 'tilebelt'
|
||||
Promise = require 'bluebird'
|
||||
x256 = require 'x256'
|
||||
simplify = require 'simplify-js'
|
||||
|
||||
Canvas = require './Canvas'
|
||||
LabelBuffer = require './LabelBuffer'
|
||||
@ -14,8 +14,6 @@ Styler = require './Styler'
|
||||
Tile = require './Tile'
|
||||
utils = require './utils'
|
||||
|
||||
#simplify = require 'simplify-js'
|
||||
|
||||
module.exports = class Renderer
|
||||
config:
|
||||
language: 'en'
|
||||
@ -87,19 +85,19 @@ module.exports = class Renderer
|
||||
|
||||
_visibleTiles: (center, zoom) ->
|
||||
z = Math.min @config.maxZoom, Math.max 0, Math.floor zoom
|
||||
xyz = tilebelt.pointToTileFraction center.lon, center.lat, z
|
||||
center = utils.ll2tile center.lon, center.lat, z
|
||||
|
||||
tiles = []
|
||||
scale = @_scaleAtZoom zoom
|
||||
tileSize = @config.tileSize / scale
|
||||
|
||||
for y in [Math.floor(xyz[1])-1..Math.floor(xyz[1])+1]
|
||||
for x in [Math.floor(xyz[0])-1..Math.floor(xyz[0])+1]
|
||||
for y in [Math.floor(center.y)-1..Math.floor(center.y)+1]
|
||||
for x in [Math.floor(center.x)-1..Math.floor(center.x)+1]
|
||||
tile = x: x, y: y, z: z
|
||||
|
||||
position =
|
||||
x: @width/2-(xyz[0]-tile.x)*tileSize
|
||||
y: @height/2-(xyz[1]-tile.y)*tileSize
|
||||
x: @width/2-(center.x-tile.x)*tileSize
|
||||
y: @height/2-(center.y-tile.y)*tileSize
|
||||
|
||||
gridSize = Math.pow 2, z
|
||||
|
||||
@ -175,7 +173,8 @@ module.exports = class Renderer
|
||||
_drawFeature: (tile, feature) ->
|
||||
if feature.style.minzoom and tile.zoom < feature.style.minzoom
|
||||
return false
|
||||
|
||||
else if feature.style.maxzoom and tile.zoom > feature.style.maxzoom
|
||||
return false
|
||||
|
||||
switch feature.style.type
|
||||
when "line"
|
||||
@ -197,53 +196,49 @@ module.exports = class Renderer
|
||||
feature.properties["name_en"] or
|
||||
feature.properties["name"] or
|
||||
feature.properties.house_num or
|
||||
"◉"
|
||||
genericSymbol = "◉"
|
||||
|
||||
points = @_scaleAndReduce tile, feature, feature.points
|
||||
for point in points
|
||||
x = point[0] - text.length
|
||||
return false if @_seen[text] and not genericSymbol
|
||||
|
||||
placed = false
|
||||
for point in @_scaleAndReduce tile, feature, feature.points
|
||||
x = point.x - text.length
|
||||
margin = @config.layers[feature.layer]?.margin or @config.labelMargin
|
||||
|
||||
if @labelBuffer.writeIfPossible text, x, point[1], feature, margin
|
||||
@canvas.text text, x, point[1], feature.color
|
||||
if @labelBuffer.writeIfPossible text, x, point.y, feature, margin
|
||||
@canvas.text text, x, point.y, feature.color
|
||||
placed = true
|
||||
break
|
||||
|
||||
else if @config.layers[feature.layer]?.cluster and
|
||||
@labelBuffer.writeIfPossible "X", point[0], point[1], feature, 3
|
||||
@canvas.text "◉", point[0], point[1], feature.color
|
||||
@labelBuffer.writeIfPossible "◉", point.x, point.y, feature, 3
|
||||
@canvas.text "◉", point.x, point.y, feature.color
|
||||
placed = true
|
||||
break
|
||||
|
||||
@_seen[text] = true if placed
|
||||
|
||||
true
|
||||
|
||||
_seen: {}
|
||||
_scaleAndReduce: (tile, feature, points, filter = true) ->
|
||||
lastX = null
|
||||
lastY = null
|
||||
outside = false
|
||||
lastX = lastY = outside = null
|
||||
scaled = []
|
||||
# seen = {}
|
||||
|
||||
minX = minY = -@tilePadding
|
||||
maxX = @width+@tilePadding
|
||||
maxY = @height+@tilePadding
|
||||
|
||||
for point in points
|
||||
x = Math.floor tile.position.x+(point.x/tile.scale)
|
||||
y = Math.floor tile.position.y+(point.y/tile.scale)
|
||||
|
||||
if lastX is x and lastY is y
|
||||
continue
|
||||
continue if lastX is x and lastY is y
|
||||
|
||||
lastY = y
|
||||
lastX = x
|
||||
|
||||
# TODO: benchmark
|
||||
# continue if seen[idx = (y<<8)+x]
|
||||
# seen[idx] = true
|
||||
|
||||
if filter
|
||||
if (
|
||||
x < -@tilePadding or
|
||||
y < -@tilePadding or
|
||||
x > @width+@tilePadding or
|
||||
y > @height+@tilePadding
|
||||
)
|
||||
if x < minX or x > maxX or y < minY or y > maxY
|
||||
continue if outside
|
||||
outside = true
|
||||
else
|
||||
@ -251,23 +246,15 @@ module.exports = class Renderer
|
||||
outside = null
|
||||
scaled.push [lastX, lastY]
|
||||
|
||||
scaled.push [x, y] #x: x, y: y
|
||||
scaled.push x: x, y: y
|
||||
|
||||
if scaled.length < 2
|
||||
if feature.style.type isnt "symbol"
|
||||
if feature.style.type isnt "symbol"
|
||||
if scaled.length < 2
|
||||
return []
|
||||
# else
|
||||
# scaled = ([point.x, point.y] for point in simplify scaled, 2, false)
|
||||
#
|
||||
# if filter
|
||||
# if scaled.length is 2
|
||||
# if @_seen[ka = (scaled[0]<<8)+scaled[1]] or
|
||||
# @_seen[kb = (scaled[1]<<8)+scaled[0]]
|
||||
# return []
|
||||
#
|
||||
# @_seen[ka] = @_seen[kb] = true
|
||||
|
||||
scaled
|
||||
simplify scaled, .5
|
||||
else
|
||||
scaled
|
||||
|
||||
_generateDrawOrder: (zoom) ->
|
||||
if zoom < 2
|
||||
|
||||
@ -191,18 +191,12 @@ module.exports = class Termap
|
||||
setImmediate => @_draw()
|
||||
|
||||
_getFooter: ->
|
||||
# features = @renderer.featuresAt @mousePosition.x-1-(@view[0]>>1), @mousePosition.y-1-(@view[1]>>2)
|
||||
# "features: ["+features.map((f) ->
|
||||
# JSON.stringify
|
||||
# name: f.feature.properties.name
|
||||
# type: f.feature.properties.type
|
||||
# rank: f.feature.properties.scalerank
|
||||
# ).join(", ")+"] "+
|
||||
#{}"#{@mousePosition.x} #{@mousePosition.y} " +
|
||||
# bbox = @_getBBox()
|
||||
# tiles = @_tilesInBBox(bbox)
|
||||
# tile = utils.ll2tile @center.lon, @center.lat, @zoom
|
||||
# "tile: #{utils.digits tile.x, 3}, #{utils.digits tile.x, 3} "+
|
||||
|
||||
"center: #{utils.digits @center.lat, 3}, #{utils.digits @center.lon, 3} "+
|
||||
"zoom: #{utils.digits @zoom, 2} "
|
||||
"zoom: #{utils.digits @zoom, 2} "+
|
||||
"mouse: #{@mousePosition.x} #{@mousePosition.y} "+
|
||||
|
||||
notify: (text) ->
|
||||
@_write "\r\x1B[K"+text unless @config.headless
|
||||
@ -217,9 +211,14 @@ module.exports = class Termap
|
||||
@zoom += step
|
||||
|
||||
moveBy: (lat, lon) ->
|
||||
@center.lat += lat
|
||||
@center.lon += lon
|
||||
@setCenter @center.lat+lat, @center.lon+lon
|
||||
|
||||
@center.lon = (@center.lon+180)%360-180
|
||||
@center.lat = 85.0511 if @center.lat > 85.0511
|
||||
@center.lat = -85.0511 if @center.lat < -85.0511
|
||||
setCenter: (lat, lon) ->
|
||||
lon += 360 if lon < -180
|
||||
lon -= 360 if lon > 180
|
||||
|
||||
lat = 85.0511 if lat > 85.0511
|
||||
lat = -85.0511 if lat < -85.0511
|
||||
|
||||
@center.lat = lat
|
||||
@center.lon = lon
|
||||
|
||||
Loading…
Reference in New Issue
Block a user