add entity ray trace demo

examplemods/entity_trace_test.js

@@ -0,0 +1,27 @@
+(() => {
+    ModAPI.meta.title("/ray_trace_test");
+    ModAPI.meta.description("Mod to test server-side raycasting.");
+    ModAPI.meta.credits("By ZXMushroom63");
+
+    PluginAPI.dedicatedServer.appendCode(function () {
+        PluginAPI.addEventListener("processcommand", (event) => {
+            if (event.command.toLowerCase().startsWith("/ray_trace_test")) {
+                if (
+                    ModAPI.reflect.getClassById("net.minecraft.entity.player.EntityPlayerMP").instanceOf(event.sender.getRef())
+                ) {
+                    //raytrace distance = 6
+                    //the 0 on the end is for client side view bobbing (frame based). we are on the server so using 0 as default.
+                    var movingObjectPosition = event.sender.rayTrace(6, 0).getCorrective();
+                    console.log(movingObjectPosition);
+
+                    var hitVec = movingObjectPosition.hitVec;
+
+                    event.sender.addChatMessage(ModAPI.reflect.getClassById("net.minecraft.util.ChatComponentText").constructors[0](
+                        movingObjectPosition.toString() //This is a java string, but that's ok since it goes into a java method.
+                    ));
+                }
+                event.preventDefault = true;
+            }
+        });
+    });
+})();