un-hardcode fog config

src/main/kotlin/CustomIntAttribute.kt

@@ -0,0 +1,37 @@
+package gay.pizza.CavesOfJolk
+
+import com.badlogic.gdx.graphics.g3d.attributes.IntAttribute
+
+class CustomIntAttribute private constructor(type: Long, value: Int): IntAttribute(type, value)
+{
+	enum class FogModes(private val value: Int)
+	{
+		Distance(0),
+		Depth(1);
+
+		fun toInt() = value
+	}
+
+	enum class FogTypes(private val value: Int)
+	{
+		Original(0),
+		Linear(1),
+		Smooth(2),
+		InvSquare(3),
+		Exp(4),
+		Exp2(5);
+
+		fun toInt() = value
+	}
+
+	companion object
+	{
+		const val FogModeAlias = "fogMode"
+		val FogMode = register(FogModeAlias)
+		fun createFogMode(value: FogModes) = CustomIntAttribute(FogMode, value.toInt())
+
+		const val FogTypeAlias = "fogType"
+		val FogType = register(FogTypeAlias)
+		fun createFogType(value: FogTypes) = CustomIntAttribute(FogType, value.toInt())
+	}
+}