mckero/Look4Sat-BA7OPF
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Minor fixes for satellite track and footprint drawing

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Arty Bishop committed 2019-12-18 10:49:34 +00:00
1 parent ccd92fd075
commit 384613d155
1 file changed
+14 -9
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app/src/main/java/com/rtbishop/lookingsat/ui/WorldMapFragment.kt
+14 -9
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@@ -44,7 +44,6 @@ import java.util.*
import java.util.concurrent.Executors
import java.util.concurrent.TimeUnit
import kotlin.math.abs
import kotlin.math.roundToInt
class WorldMapFragment : Fragment() {
@@ -153,12 +152,15 @@ class WorldMapFragment : Fragment() {
val satPosNow = predictor.getSatPos(currentTime)
val satPosList = predictor.getPositions(currentTime, 60, 0, orbitalPeriod * 3)
val footprintPosList = satPosNow.rangeCircle
drawGroundTrack(canvas, frameWidth, frameHeight, satPosList)
drawFootprint(canvas, frameWidth, frameHeight, footprintPosList)
drawGroundTrack(canvas, frameWidth, frameHeight, satPosList)
drawHomeLoc(canvas, frameWidth, frameHeight)
}
private fun drawGroundTrack(canvas: Canvas, width: Int, height: Int, list: List<SatPos>) {
canvas.setMatrix(Matrix().apply {
postTranslate(width / 2f, height / 2f)
})
val trackPath = Path()
var trackX: Float
var trackY: Float
@@ -166,23 +168,26 @@ class WorldMapFragment : Fragment() {
list.withIndex().forEach { (index, satPos) ->
trackX = rad2Deg(satPos.longitude).toFloat()
trackY = rad2Deg(satPos.latitude).toFloat() * -1
if (trackX <= 180.0) trackX += 180
else trackX -= 180
if (trackX > 180f) trackX -= 360f
trackX *= width / 360f
trackY =
((90.0 - rad2Deg(satPos.latitude)) * (height / 180.0)).roundToInt().toFloat()
trackY *= height / 180f
if (index == 0 || abs(trackX - prevX) > 180) trackPath.moveTo(trackX, trackY)
else trackPath.lineTo(trackX, trackY)
prevX = trackX
}
canvas.drawPath(trackPath, groundTrackPaint)
}
private fun drawFootprint(canvas: Canvas, width: Int, height: Int, list: List<Position>) {
canvas.setMatrix(Matrix().apply {
postTranslate(width / 2f, height / 2f)
})
val printPath = Path()
var printX: Float
var printY: Float
@@ -190,12 +195,12 @@ class WorldMapFragment : Fragment() {
list.withIndex().forEach { (index, position) ->
printX = position.lon.toFloat()
printY = position.lat.toFloat() * -1
if (printX <= 180f) printX += 180f
else printX -= 180f
if (printX > 180f) printX -= 360f
printX *= width / 360f
printY = ((90.0 - position.lat) * (height / 180.0)).roundToInt().toFloat()
printY *= height / 180f
if (index == 0 || abs(printX - prevX) > 180) printPath.moveTo(printX, printY)
else printPath.lineTo(printX, printY)