diff --git a/main/xplane.go b/main/xplane.go index 1b743ca1..9c4b6b47 100644 --- a/main/xplane.go +++ b/main/xplane.go @@ -1,10 +1,15 @@ /* Copyright (c) 2018 Thorsten Biermann + Copyright (c) 2013 Adrian Batzill Distributable under the terms of The "BSD New" License that can be found in the LICENSE file, herein included as part of this header. xplane.go: Routines for generating X-Plane data feed + + Seems to be mostly undocumented, so instead of reverse engineering x-plane, we use this: + https://www.foreflight.com/support/network-gps/ + Seems to be very similar, but the XATT message is cut short. It seems to work with most software though? */ package main @@ -15,18 +20,19 @@ import ( ) func convertKnotsToXPlaneSpeed(knots float32) float32 { - return knots / 1.945 + return knots / 1.94384 // meters per second } func createXPlaneGpsMsg(latDeg float32, lonDeg float32, altMslFt float32, trackDeg float32, speedKt float32) []byte { // example: XGPS1,-122.298432,47.450756,420.9961,349.7547,57.9145 - return []byte(fmt.Sprintf("XGPS1,%.6f,%.6f,%.4f,%.4f,%.4f", lonDeg, latDeg, convertFeetToMeters(altMslFt), trackDeg, convertKnotsToXPlaneSpeed(speedKt))) + return []byte(fmt.Sprintf("XGPSStratux,%.6f,%.6f,%.4f,%.4f,%.4f", lonDeg+0.5, latDeg, convertFeetToMeters(altMslFt), trackDeg, convertKnotsToXPlaneSpeed(speedKt))) } func createXPlaneAttitudeMsg(headingDeg float32, pitchDeg float32, rollDeg float32) []byte { // example: XATT1,345.1,-1.1,-12.5,0.1374,0.0954,-0.0444,-17.0,-1.2,-65.0,-0.01,1.63,0.02 // TODO find out what the remaining parameters are for - return []byte(fmt.Sprintf("XATT1,%.1f,%.1f,%.1f,%.4f,%.4f,%.4f,%.1f,%.1f,%.1f,%.2f,%.2f,%.2f", headingDeg, pitchDeg, rollDeg, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0)) + //return []byte(fmt.Sprintf("XATT1,%.1f,%.1f,%.1f,%.4f,%.4f,%.4f,%.1f,%.1f,%.1f,%.2f,%.2f,%.2f", headingDeg, pitchDeg, rollDeg, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0)) + return []byte(fmt.Sprintf("XATTStratux,%.1f,%.1f,%.1f", headingDeg, pitchDeg, rollDeg)) } func createXPlaneTrafficMsg(targetId uint32, latDeg float32, lonDeg float32, altFt int32, hSpeedKt uint32, vSpeedFpm int32, onGround bool, trackDeg uint32, callSign string) []byte { @@ -44,5 +50,5 @@ func createXPlaneTrafficMsg(targetId uint32, latDeg float32, lonDeg float32, alt regEx, _ := regexp.Compile("[^a-zA-Z0-9]+") cleanCallSign := regEx.ReplaceAllString(callSign, "") - return []byte(fmt.Sprintf("XTRA1,%d,%.6f,%.6f,%d,%d,%d,%d,%d,%s", targetId, latDeg, lonDeg, altFt, vSpeedFpm, airborneValue, trackDeg, hSpeedKt, cleanCallSign)) + return []byte(fmt.Sprintf("XTRAFFICStratux,%d,%.6f,%.6f,%d,%d,%d,%d,%d,%s", targetId, latDeg, lonDeg, altFt, vSpeedFpm, airborneValue, trackDeg, hSpeedKt, cleanCallSign)) }