Added distance to ObservationFromRay

Minecraft/src/main/java/com/microsoft/Malmo/MissionHandlers/ObservationFromRayImplementation.java

@@ -117,6 +117,7 @@ else if (prop.getValueClass() == Integer.class)
                 }
             }
             jsonMop.addProperty("inRange", hitDist <= blockReach);
+            jsonMop.addProperty("distance", hitDist);
         }
         else if (mop.typeOfHit == MovingObjectPosition.MovingObjectType.ENTITY)
         {
@@ -145,6 +146,7 @@ else if (mop.typeOfHit == MovingObjectPosition.MovingObjectType.ENTITY)
                 jsonMop.addProperty("hitType", hitType);
             }
             jsonMop.addProperty("inRange", hitDist <= entityReach);
+            jsonMop.addProperty("distance", hitDist);
         }
         json.add("LineOfSight", jsonMop);
     }

Schemas/MissionHandlers.xsd

@@ -1483,7 +1483,7 @@
       <xs:documentation>
         When present, the Mod will return a JSON object called "LineOfSight", containing observations about the block or entity which is currently in the centre of the screen:
 
-        * Hit details: {{{hitType}}} - will be "block" for a block, "entity" for an entity (eg spider, rabbit etc) or "item" for a free-floating item that can be picked up. {{{inRange}}} will be true if the block/entity is within the agent's reach - ie attacking or using will have an effect on the object.
+        * Hit details: {{{hitType}}} - will be "block" for a block, "entity" for an entity (eg spider, rabbit etc) or "item" for a free-floating item that can be picked up. {{{inRange}}} will be true if the block/entity is within the agent's reach - ie attacking or using will have an effect on the object. {{{distance}}} gives the straight-line distance from the agent.
         * Position: {{{x}}}, {{{y}}}, {{{z}}} - in the case of block hits, will be the precise point when the ray intercepts the block.
         * Type information: {{{type}}}, {{{colour}}}, {{{variant}}}, {{{facing}}}
         * Extra properties: in the case of block types, any extra properties will be returned by their minecraft name, prefixed with "prop_" (eg, for leaves, "prop_decayable" and "prop_check_decay") - this is the same data as can be seen by exploring Minecraft with the F3 debug information displayed. For floating items, the stack size is returned in {{{stackSize}}}

changelog.txt

@@ -1,3 +1,7 @@
+0.?
+-------------------
+New: ObservationFromRay now returns distance.
+
 0.21.0
 -------------------
 New: yaw and pitch added to nearby entity observations.