fluid viscosity on phys sim

src/net/torvald/terrarum/gameworld/GameWorld.kt

@@ -805,7 +805,7 @@ open class GameWorld(
     data class FluidInfo(val type: ItemID = Fluid.NULL, val amount: Float = 0f) {
         /** test if this fluid should be considered as one */
         fun isFluid() = type != Fluid.NULL && amount >= WorldSimulator.FLUID_MIN_MASS
-        fun getProp(): Nothing = TODO()
+        fun getProp() = FluidCodex[type]
         override fun toString() = "Fluid type: ${type}, amount: $amount"
     }
 

src/net/torvald/terrarum/gameworld/WorldTime.kt

@@ -49,9 +49,7 @@ import kotlin.math.cos
  * internal functions `getFormattedTime()`, `getShortTime()`, and `getFilenameTime()`
  * - Preferred computerised date format is YearMonthDate. E.g. 01250407
  * - Rest of the format (e.g. time intervals) follows ISO 8601 standard.
- *
- * (Check please:)
- * - Equinox/Solstice always occur on 21st day of the month
+ * - Equinox/Solstice always occur on 15th day of the month
  *
  *
  * Created by minjaesong on 2016-01-24.