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Merge pull request #13 from adtewa/feature/5_given_two_coordinates_de…
…termine_visibility Feature/5 given two coordinates determine visibility
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59 changes: 59 additions & 0 deletions
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src/main/java/hu/awm/srtm/tools/cansee/CanSeeCalculator.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,59 @@ | ||
| package hu.awm.srtm.tools.cansee; | ||
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| import hu.awm.srtm.data.hgt.Tile; | ||
| import hu.awm.srtm.data.hgt.TileMap; | ||
| import hu.awm.srtm.map.contour.ContourCalculator; | ||
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| public class CanSeeCalculator { | ||
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| private Vector3D from; | ||
| private Vector3D to; | ||
| private TileMap tileMap; | ||
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| public CanSeeCalculator() { | ||
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| } | ||
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| public void setCoordinates(Double fromLat, Double fromLon, Double fromHeight, Double toLat, Double toLon, Double toHeight) { | ||
| this.from = new Vector3D(fromLat, fromLon, fromHeight); | ||
| this.to = new Vector3D(toLat, toLon, toHeight); | ||
| } | ||
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| public void setTileMap(TileMap tileMap) { | ||
| this.tileMap = tileMap; | ||
| } | ||
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| public Sight calculateSight() { | ||
| Vector3D loseSightCoordinate = null; | ||
| Vector3D directionVector = to.subtract(from); | ||
| double stepCount = Math.max(Math.abs(to.getLat() - from.getLat()) * Tile.RESOLUTION, | ||
| Math.abs(to.getLon() - from.getLon()) * Tile.RESOLUTION) * 2; | ||
| Vector3D stepVector = directionVector.getInstanceResizedToLength(directionVector.length() / stepCount); | ||
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| for (Vector3D i = from.newInstance(); i.lengthTo(to) > stepVector.length(); i = i.add(stepVector)) { | ||
| if (!isPointVisible(i)) { | ||
| loseSightCoordinate = i.newInstance(); | ||
| break; | ||
| } | ||
| } | ||
| if (loseSightCoordinate == null) { | ||
| if (!isPointVisible(to)) { | ||
| loseSightCoordinate = to.newInstance(); | ||
| } | ||
| } | ||
| return new Sight(from, to, loseSightCoordinate); | ||
| } | ||
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| public boolean calculateBoolean() { | ||
| Sight sight = calculateSight(); | ||
| return !sight.hasBlocker(); | ||
| } | ||
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| private boolean isPointVisible(Vector3D pointToCheck) { | ||
| int tileLat = pointToCheck.getLat().intValue(); | ||
| int tileLon = pointToCheck.getLon().intValue(); | ||
| Tile tile = tileMap.getByLatLon(tileLat, tileLon); | ||
| double height = tile.elevationByExactCoordinates(pointToCheck.getLat(), pointToCheck.getLon()); | ||
| return height <= pointToCheck.getHeight(); | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,44 @@ | ||
| package hu.awm.srtm.tools.cansee; | ||
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| public class Sight { | ||
| private Vector3D startCoordinate; | ||
| private Vector3D endCoordinate; | ||
| private Vector3D looseSightCoordinate; | ||
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| public Sight() { | ||
| } | ||
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| public Sight(Vector3D startCoordinate, Vector3D endCoordinate, Vector3D looseSightCoordinate) { | ||
| this.startCoordinate = startCoordinate; | ||
| this.endCoordinate = endCoordinate; | ||
| this.looseSightCoordinate = looseSightCoordinate; | ||
| } | ||
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| public Vector3D getStartCoordinate() { | ||
| return startCoordinate; | ||
| } | ||
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| public void setStartCoordinate(Vector3D startCoordinate) { | ||
| this.startCoordinate = startCoordinate; | ||
| } | ||
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| public Vector3D getEndCoordinate() { | ||
| return endCoordinate; | ||
| } | ||
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| public void setEndCoordinate(Vector3D endCoordinate) { | ||
| this.endCoordinate = endCoordinate; | ||
| } | ||
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| public Vector3D getLooseSightCoordinate() { | ||
| return looseSightCoordinate; | ||
| } | ||
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| public void setLooseSightCoordinate(Vector3D looseSightCoordinate) { | ||
| this.looseSightCoordinate = looseSightCoordinate; | ||
| } | ||
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| public boolean hasBlocker() { | ||
| return this.looseSightCoordinate != null; | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,64 @@ | ||
| package hu.awm.srtm.tools.cansee; | ||
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| public class Vector3D { | ||
| private Double lat; | ||
| private Double lon; | ||
| private Double height; | ||
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| public Vector3D(Double lat, Double lon, Double height) { | ||
| this.lat = lat; | ||
| this.lon = lon; | ||
| this.height = height; | ||
| } | ||
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| public Vector3D newInstance() { | ||
| return new Vector3D(this.lat, this.lon, this.height); | ||
| } | ||
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| public Double getLat() { | ||
| return lat; | ||
| } | ||
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| public Double getLon() { | ||
| return lon; | ||
| } | ||
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| public Double getHeight() { | ||
| return height; | ||
| } | ||
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| public Vector3D getInstanceResizedToLength(Double newLength) { | ||
| Double ratio = newLength / length(); | ||
| return new Vector3D(lat * ratio, lon * ratio, height * ratio); | ||
| } | ||
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| public Double length() { | ||
| return Math.sqrt(Math.pow(lat, 2.0) | ||
| + Math.pow(lon, 2.0) | ||
| + Math.pow(height, 2.0)); | ||
| } | ||
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| public static Vector3D subtract(Vector3D from, Vector3D what) { | ||
| return from.subtract(what); | ||
| } | ||
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| public Vector3D subtract(Vector3D what) { | ||
| return new Vector3D(this.lat - what.getLat(), | ||
| this.lon - what.getLon(), | ||
| this.height - what.getHeight()); | ||
| } | ||
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| public static Vector3D add(Vector3D to, Vector3D what) { | ||
| return to.add(what); | ||
| } | ||
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| public Vector3D add(Vector3D what) { | ||
| return new Vector3D(this.lat + what.getLat(), | ||
| this.lon + what.getLon(), | ||
| this.height + what.getHeight()); | ||
| } | ||
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| public double lengthTo(Vector3D what) { | ||
| return what.subtract(this).length(); | ||
| } | ||
| } |