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sky model update

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minjaesong
2023-07-25 15:15:12 +09:00
parent a73c536941
commit 4fb30821f1
5 changed files with 23 additions and 15 deletions
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12
src/net/torvald/terrarum/gameworld/WorldTime.kt
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@@ -125,21 +125,17 @@ class WorldTime(initTime: Long = 0L) {
val TIME_T = DAY_LENGTH * ordinalDay + second
val x = (TIME_T % YEAR_SECONDS).toDouble() / DAY_LENGTH + 15 // decimal days. One full day = 1.0
val d = -23.44 * cos(TWO_PI * x / YEAR_DAYS)
// 51.56 and 23.44 will make yearly min/max elevation to be 75deg
// -0.2504264: a number that makes y=min when x=0 (x=0 is midnight)
return 51.56 * sin(TWO_PI * (x - 0.2504264)) + d
val d = -23.44 * cos(TWO_PI * x / YEAR_DAYS)
return -51.56 * cos(TWO_PI * x) + d
}
val solarElevationDeg: Double
get() {
val x = (TIME_T % YEAR_SECONDS).toDouble() / DAY_LENGTH + 15 // decimal days. One full day = 1.0
val d = -23.44 * cos(TWO_PI * x / YEAR_DAYS)
// 51.56 and 23.44 will make yearly min/max elevation to be 75deg
// -0.2504264: a number that makes y=min when x=0 (x=0 is midnight)
return 51.56 * sin(TWO_PI * (x - 0.2504264)) + d
val d = -23.44 * cos(TWO_PI * x / YEAR_DAYS)
return -51.56 * cos(TWO_PI * x) + d
}
val solarElevationRad: Double
get() = Math.toRadians(solarElevationDeg)