-
Notifications
You must be signed in to change notification settings - Fork 0
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Draws the lava flows occuring at an eruption on the map on a separate layer, #3
- Loading branch information
1 parent
013f9f4
commit 2d7648e
Showing
13 changed files
with
402 additions
and
221 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,126 @@ | ||
| @etna = @etna || {} | ||
|
|
||
| @etna.lavaLayer = (map, mapDrawSvg, mapDrawGroup) -> | ||
|
|
||
| etnaLocation = [15.004, 37.734] | ||
| # TODO: these should be shared with the eruptions layer | ||
| craterLocations = { | ||
| "NorthEast": [15.0636, 37.7516], | ||
| "SouthEast": [15.0742, 37.7098], | ||
| "Voragine": [15.0677, 37.7305], | ||
| "Bocca Nuova": [15.0197, 37.7256] | ||
| } | ||
|
|
||
| firstDraw = true | ||
|
|
||
|
|
||
| # projects a location in geographical data to pixel-space. | ||
| project = (location) -> | ||
| point = map.locationPoint | ||
| lat: location[1] | ||
| lon: location[0] | ||
| [point.x, point.y] | ||
|
|
||
|
|
||
| # calculates the distance in lat points with the hack 111km = 1 lat point | ||
| getLatDistance = (distance) -> | ||
| distance / 111; | ||
|
|
||
|
|
||
| getLonDistance = (distance, latitude) -> | ||
| distance / (111 * Math.cos(latitude)) | ||
|
|
||
|
|
||
| getPath = (length, craterLocation, craterLocationMapped, angle, horizDir, vertDir) -> | ||
| distLon = getLonDistance(length * Math.sin(angle), craterLocation[1]) | ||
| distLat = getLatDistance(length * Math.cos(angle)) | ||
| distPointLon = craterLocation[0] + (horizDir * distLon) | ||
| distPointLat = craterLocation[1] + (vertDir * distLat) | ||
|
|
||
| distPoint = project([distPointLon, distPointLat]) | ||
| path = "M #{craterLocationMapped[0]} #{craterLocationMapped[1]} L #{distPoint[0]} #{distPoint[1]}" | ||
|
|
||
|
|
||
| draw: () -> | ||
| if firstDraw | ||
| mapDrawSvg | ||
| .attr('width', map.dimensions.x) | ||
| .attr('height', map.dimensions.y) | ||
| .style('margin-left', '0px') | ||
| .style('margin-top', '0px') | ||
| firstDraw = false | ||
|
|
||
| pixelLocation = project(etnaLocation) | ||
|
|
||
| mapDrawGroup.selectAll('path') | ||
| .attr('d', (d, i) -> | ||
| # TODO how is this possible? | ||
| if d == 0 | ||
| return "M 0 0 L 0 0" | ||
| craterLocation = craterLocations[d.crater] | ||
| if !craterLocation # TODO: should not be possible | ||
| return "M 0 0 L 0 0" | ||
| craterLocationMapped = project(craterLocation) | ||
|
|
||
| # ANGLES: | ||
| # South, North: 0 | ||
| # -> steered over vert direction | ||
| # East, West: PI / 2 | ||
| # -> steered over horiz direction | ||
|
|
||
| switch d.direction | ||
| when "South" | ||
| getPath(d.length, craterLocation, craterLocationMapped, 0, 1, -1) | ||
| when "North" | ||
| getPath(d.length, craterLocation, craterLocationMapped, 0, -1, 1) | ||
| when "East" | ||
| getPath(d.length, craterLocation, craterLocationMapped, Math.PI / 2, 1, 1) | ||
| when "West" | ||
| getPath(d.length, craterLocation, craterLocationMapped, Math.PI / 2, -1, 1) | ||
| when "SouthEast" | ||
| getPath(d.length, craterLocation, craterLocationMapped, Math.PI / 4, 1, -1) | ||
| when "SouthWest" | ||
| getPath(d.length, craterLocation, craterLocationMapped, Math.PI / 4, -1, -1) | ||
| when "NorthWest" | ||
| getPath(d.length, craterLocation, craterLocationMapped, Math.PI / 4, -1, 1) | ||
| when "NorthEast" | ||
| getPath(d.length, craterLocation, craterLocationMapped, Math.PI / 4, 1, 1) | ||
| when "NNorthWest" | ||
| getPath(d.length, craterLocation, craterLocationMapped, Math.PI / 8, -1, 1) | ||
| when "WNorthWest" | ||
| getPath(d.length, craterLocation, craterLocationMapped, 3 * (Math.PI / 8), -1, 1) | ||
| when "NNorthEast" | ||
| getPath(d.length, craterLocation, craterLocationMapped, Math.PI / 8, 1, 1) | ||
| when "WSouthWest" | ||
| getPath(d.length, craterLocation, craterLocationMapped, 3 * (Math.PI / 8), -1, -1) | ||
| when "SSouthEast" | ||
| getPath(d.length, craterLocation, craterLocationMapped, Math.PI / 8, 1, -1) | ||
| when "ESouthEast" | ||
| getPath(d.length, craterLocation, craterLocationMapped, 3*(Math.PI / 8), 1, -1) | ||
| else | ||
| "M 0 0 L 0 0" | ||
|
|
||
| ) | ||
| .attr("stroke", "red") | ||
| .attr("stroke-width", 10) | ||
| .attr("fill", "red") | ||
| .selectAll('title') | ||
| .text((d, i) -> | ||
| "lavaflow in #{d.date.getFullYear()}" | ||
| ) | ||
|
|
||
|
|
||
| data: (boundingBox, flows) -> | ||
| bounds = d3.geo.bounds(boundingBox) | ||
| lava = mapDrawGroup.selectAll('path') | ||
| .data(flows) | ||
| lava.exit().remove().remove() | ||
| lava.enter().append('path').append('title') | ||
|
|
||
|
|
||
| # sets the visible map extension | ||
| extent: () -> | ||
| new MM.Extent( | ||
| new MM.Location(bounds[0][1], bounds[0][0]), | ||
| new MM.Location(bounds[1][1], bounds[1][0]) | ||
| ) |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Oops, something went wrong.