faux global illumination impl

src/net/torvald/terrarum/blockproperties/BlockCodex.kt

@@ -208,6 +208,8 @@ class BlockCodex {
 
         prop.dynamicLuminosityFunction = record.intVal("dlfn")
 
+        prop.reflectance = record.floatVal("refl")
+
         blockProps[prop.id] = prop
 
         printdbg(this, "Setting prop ${prop.id} ->>\t${prop.nameKey}\tsolid:${prop.isSolid}")

src/net/torvald/terrarum/blockproperties/BlockProp.kt

@@ -92,6 +92,8 @@ class BlockProp {
 
     var material: String = ""
 
+    var reflectance = 0f // the exact colour of the reflected light depends on the texture
+
     @Transient var rngBase0 = Math.random().toFloat() // initial cycle phase (xxxxFuncX)
     @Transient var rngBase1 = Math.random().toFloat() // flicker P0, etc
     @Transient var rngBase2 = Math.random().toFloat() // flicker P1, etc