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cloud spawn: fixing my bad maths

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minjaesong
2023-08-28 00:04:00 +09:00
parent 3cce1c0b65
commit 7845146718
1 changed files with 7 additions and 4 deletions
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11
src/net/torvald/terrarum/weather/WeatherMixer.kt
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@@ -381,7 +381,8 @@ internal object WeatherMixer : RNGConsumer {
* Returns random point for clouds to spawn from, in the opposite side of the current wind vector
*/
private fun getCloudSpawningPosition(cloud: CloudProps, halfCloudSize: Float, windVector: Vector3): Vector3 {
val Z_LIM = ALPHA_ROLLOFF_Z/2f
val Z_LIM = ALPHA_ROLLOFF_Z
val Z_POW_BASE = ALPHA_ROLLOFF_Z / 4f
val y = takeUniformRand(-cloud.altHigh..-cloud.altLow) * scrHscaler
var windVectorDir = toDegrees(atan2(windVector.z.toDouble(), windVector.x.toDouble())).toFloat() + 180f
@@ -405,19 +406,19 @@ internal object WeatherMixer : RNGConsumer {
return when (selectedQuadrant.floorToInt()) {
-4, 0, 4 -> { // right side of the screen
val z = FastMath.interpolateLinear(rr, 1f, ALPHA_ROLLOFF_Z).pow(1.5f) // clouds are more likely to spawn with low Z-value
val z = FastMath.interpolateLinear(rr, 1f, Z_POW_BASE).pow(1.5f) // clouds are more likely to spawn with low Z-value
val posXscr = App.scr.width + halfCloudSize
val x = WeatherObjectCloud.screenXtoWorldX(posXscr, z)
Vector3(x, y, z)
}
-3, 1, 5 -> { // z = inf
val z = ALPHA_ROLLOFF_Z
val posXscr = FastMath.interpolateLinear(rr, App.scr.width + halfCloudSize, -halfCloudSize)
val posXscr = FastMath.interpolateLinear(rr, -halfCloudSize, App.scr.width + halfCloudSize)
val x = WeatherObjectCloud.screenXtoWorldX(posXscr, Z_LIM)
Vector3(x, y, z)
}
-2, 2, 6 -> { // left side of the screen
val z = FastMath.interpolateLinear(rr, ALPHA_ROLLOFF_Z, 1f).pow(1.5f) // clouds are more likely to spawn with low Z-value
val z = FastMath.interpolateLinear(rr, Z_POW_BASE, 1f).pow(1.5f) // clouds are more likely to spawn with low Z-value
val posXscr = -halfCloudSize
val x = WeatherObjectCloud.screenXtoWorldX(posXscr, z)
Vector3(x, y, z)
@@ -471,6 +472,8 @@ internal object WeatherMixer : RNGConsumer {
it.pos.set(precalculatedPos ?: getCloudSpawningPosition(cloud, hCloudSize, windVector))
// if (precalculatedPos == null) printdbg(this, "Z=${it.posZ}")
// further set the random altitude if required
if (precalculatedPos != null) {
it.pos.y = takeUniformRand(-cloud.altHigh..-cloud.altLow) * scrHscaler