This is a short flow to demonstrate how to communicate from Node-RED with Minecraft. It uses a TCP request to push "player.getPos()\n" into Steve's world and will receive the coordinate tuple in a node.js buffer format that is converted. It goes on to extract the coordinates and populates an array with "word.getBlock()" statements for a cube around the player's position. The results of the following TCP requests are collected, and if no more information arrives, printed to the debug panel. Note that you have to run Minecraft and enter a world before triggering this flow.
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Block inventory in Minecraft
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| [{"id":"533edf4.facc12","type":"function","z":"e13b1b02.1ec4e8","name":"getPos()","func":"msg.payload = \"player.getPos()\\n\";\nreturn msg;","outputs":1,"noerr":0,"x":207,"y":151,"wires":[["71429f10.8ebd6"]]},{"id":"dd58ffe0.22a7","type":"debug","z":"e13b1b02.1ec4e8","name":"","active":true,"console":"false","complete":"payload","x":642,"y":278,"wires":[]},{"id":"cc9ed7e5.336128","type":"inject","z":"e13b1b02.1ec4e8","name":"inject","topic":"","payload":"trigger","payloadType":"string","repeat":"","crontab":"","once":false,"x":98,"y":53,"wires":[["533edf4.facc12"]]},{"id":"71429f10.8ebd6","type":"tcp request","z":"e13b1b02.1ec4e8","server":"127.0.0.1","port":"4711","out":"char","splitc":"\\n","name":"","x":329,"y":74,"wires":[["a9afe2c4.56502"]]},{"id":"a9afe2c4.56502","type":"function","z":"e13b1b02.1ec4e8","name":"getBlock()","func":"var arr = msg.payload.toString().replace(/(\\n|\\r)+$/, '').split(\",\");\n\nvar x = parseInt(arr[0]);\nvar z = parseInt(arr[1]);\nvar y = parseInt(arr[2])\nvar cube_size = 3;\n\nvar coord_set = []\n for (var h = x-cube_size; h < x+cube_size+1; h++) {\n for (var k = z-cube_size; k < z+cube_size+1; k++) {\n for (var l = y-cube_size; l < y+cube_size+1; l++) {\n coord_set.push({payload: \"world.getBlock(\"+h+\",\"+k+\",\"+l+\")\\n\"});\n }\n }\n }\nreturn [coord_set];","outputs":1,"noerr":0,"x":463,"y":140,"wires":[["9713fdf5.68ec"]]},{"id":"9713fdf5.68ec","type":"tcp request","z":"e13b1b02.1ec4e8","server":"127.0.0.1","port":"4711","out":"char","splitc":"\\n","name":"","x":203,"y":277,"wires":[["4958e94e.b6a718","e8e39686.171c68"]]},{"id":"4958e94e.b6a718","type":"function","z":"e13b1b02.1ec4e8","name":"tabulate","func":"if (msg.payload === \"trigger\") {\n msg.payload = context.table;\n context.table = undefined;\n return msg;\n} else {\n var ID = msg.payload.toString().replace(/(\\n|\\r)+$/, '');\n \n context.table = context.table || {};\n context.table[ID] = context.table[ID] || 0;\n context.table[ID] = context.table[ID]+1;\n}","outputs":1,"noerr":0,"x":470,"y":278,"wires":[["dd58ffe0.22a7"]]},{"id":"e8e39686.171c68","type":"trigger","z":"e13b1b02.1ec4e8","op1":"1","op2":"trigger","op1type":"nul","op2type":"val","duration":"250","extend":true,"units":"ms","name":"","x":362,"y":354,"wires":[["4958e94e.b6a718"]]}] |
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