Merge pull request #371 from ValkyrienSkies/speed-dependent-stable

Speed and mass dependent stabilization

Author: millennIumAMbiguity

common/src/main/kotlin/org/valkyrienskies/eureka/EurekaConfig.kt

@@ -120,6 +120,14 @@ object EurekaConfig {
         @JsonSchema(description = "How fast a ship will stop. 1 = fast stop, 0 = slow stop")
         var linearStabilizeMaxAntiVelocity = 1.0
 
+        // Instability scaled with mass and squared speed
+        @JsonSchema(description = "Stronger stabilization with higher mass, less at higher speeds.")
+        var scaledInstability = 1000.0
+
+        // Unscaled linear instability cased by speed
+        @JsonSchema(description = "Less stabilization at higher speed.")
+        var unscaledInstability = 0.271828
+
         @JsonSchema(description = "How fast a ship will stop and accelerate.")
         var linearMassScaling = 0.0002
 

common/src/main/kotlin/org/valkyrienskies/eureka/ship/Stabilize.kt

@@ -6,6 +6,7 @@ import org.valkyrienskies.core.api.ships.PhysShip
 import org.valkyrienskies.core.impl.game.ships.PhysShipImpl
 import org.valkyrienskies.eureka.EurekaConfig
 import kotlin.math.atan
+import kotlin.math.max
 
 fun stabilize(
     ship: PhysShipImpl,
@@ -46,7 +47,9 @@ fun stabilize(
         )
     )
 
-    stabilizationTorque.mul(EurekaConfig.SERVER.stabilizationTorqueConstant)
+    val speed = ship.poseVel.vel.length()
+
+    stabilizationTorque.mul(EurekaConfig.SERVER.stabilizationTorqueConstant / max(1.0, speed * speed * EurekaConfig.SERVER.scaledInstability / ship.inertia.shipMass + speed * EurekaConfig.SERVER.unscaledInstability))
     forces.applyInvariantTorque(stabilizationTorque)
 
     if (linear) {