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These are the user uploaded subtitles that are being translated: 1 00:00:00.05 --> 00:00:03.00 - [Instructor] The last generative design specific node 2 00:00:03.00 --> 00:00:04.08 that we'll be learning about in Dynamo 3 00:00:04.08 --> 00:00:06.08 is the data.gate node. 4 00:00:06.08 --> 00:00:09.08 This node allows us to control flow between elements 5 00:00:09.08 --> 00:00:12.02 in our generative design scripts. 6 00:00:12.02 --> 00:00:15.04 I currently have the Revit and Dynamo exercise files 7 00:00:15.04 --> 00:00:16.09 open for this lesson. 8 00:00:16.09 --> 00:00:20.06 The Dynamo file is the three box massing study sample 9 00:00:20.06 --> 00:00:22.06 provided by Autodesk. 10 00:00:22.06 --> 00:00:26.06 The data.gate node is found in the generative design tab 11 00:00:26.06 --> 00:00:30.00 of the node library, and then the data section 12 00:00:30.00 --> 00:00:32.09 and here we have the gate node. 13 00:00:32.09 --> 00:00:34.02 This script, however, has already placed 14 00:00:34.02 --> 00:00:38.00 one of these nodes in the integrate section of the script, 15 00:00:38.00 --> 00:00:39.08 which is found in the bottom right. 16 00:00:39.08 --> 00:00:42.01 Here we have this data.gate node. 17 00:00:42.01 --> 00:00:45.01 The gate node is similar to a Boolean toggle 18 00:00:45.01 --> 00:00:49.02 in that it has two states, either open or closed. 19 00:00:49.02 --> 00:00:52.05 If it is set open, then data that is input to the node 20 00:00:52.05 --> 00:00:55.09 will be passed through an output and if it's closed, 21 00:00:55.09 --> 00:00:58.05 then the data won't be passed through. 22 00:00:58.05 --> 00:01:02.05 We can test this by hitting run on the script. 23 00:01:02.05 --> 00:01:05.03 As we can see, the Dynamo geometry has been created 24 00:01:05.03 --> 00:01:06.06 in the background. 25 00:01:06.06 --> 00:01:10.00 However, this direct shaped.by geometry node 26 00:01:10.00 --> 00:01:13.08 is not receiving that geometry from the gate's node 27 00:01:13.08 --> 00:01:15.06 because it's set to closed 28 00:01:15.06 --> 00:01:18.04 and therefore it's outputting null. 29 00:01:18.04 --> 00:01:22.02 So if we open this gate and then hit run again, 30 00:01:22.02 --> 00:01:24.08 we can see that that node now executes 31 00:01:24.08 --> 00:01:27.09 and it's creating a direct shape in Revit. 32 00:01:27.09 --> 00:01:30.04 There are a couple of reasons why this is required 33 00:01:30.04 --> 00:01:33.07 for a generative design script in Dynamo. 34 00:01:33.07 --> 00:01:35.09 As the generic design script runs, 35 00:01:35.09 --> 00:01:38.06 it's running the Dynamo script over and over 36 00:01:38.06 --> 00:01:40.04 to generate different results. 37 00:01:40.04 --> 00:01:42.04 If we did not have this closed gate, 38 00:01:42.04 --> 00:01:44.03 it would mean the elements in Dynamo 39 00:01:44.03 --> 00:01:46.06 would be continuously created in Revit 40 00:01:46.06 --> 00:01:49.04 slowing the process considerably and resulting in 41 00:01:49.04 --> 00:01:52.04 a lot of elements in Revit that we simply don't want. 42 00:01:52.04 --> 00:01:55.00 The second reason this node is useful is that 43 00:01:55.00 --> 00:01:58.07 it can be controlled in Revit to create the final elements 44 00:01:58.07 --> 00:02:00.06 when finishing a study. 45 00:02:00.06 --> 00:02:05.04 So if we close down Dynamo, 46 00:02:05.04 --> 00:02:09.05 we can see the elements that we just created from Dynamo. 47 00:02:09.05 --> 00:02:13.02 Let's delete that and then let's create a new study 48 00:02:13.02 --> 00:02:16.06 which will be a three box massing study 49 00:02:16.06 --> 00:02:19.00 and we'll leave everything as default. 50 00:02:19.00 --> 00:02:22.03 However, let's change the population size to five 51 00:02:22.03 --> 00:02:27.08 and generations to five as well, 52 00:02:27.08 --> 00:02:29.03 and hit generate. 53 00:02:29.03 --> 00:02:32.03 Here we can see it's generated a few results 54 00:02:32.03 --> 00:02:34.05 and by selecting one, we can go ahead 55 00:02:34.05 --> 00:02:36.01 and create the Revit elements 56 00:02:36.01 --> 00:02:39.05 by selecting the create Revit elements button. 57 00:02:39.05 --> 00:02:43.00 This create button is basically telling the Dynamo script 58 00:02:43.00 --> 00:02:46.02 to open all of the data.gate nodes 59 00:02:46.02 --> 00:02:52.06 so that the elements can be created in Revit. 60 00:02:52.06 --> 00:02:55.08 This is why this specific node is required to be used 61 00:02:55.08 --> 00:02:57.07 in our generative design scripts, 62 00:02:57.07 --> 00:03:00.08 rather than an if else node for example. 63 00:03:00.08 --> 00:03:04.09 If you're using Project Refinery rather than Revit 2021, 64 00:03:04.09 --> 00:03:07.04 it's important to note here that this create option 65 00:03:07.04 --> 00:03:09.07 is not available in Dynamo. 66 00:03:09.07 --> 00:03:12.09 Therefore, once you find a solution you like in Dynamo, 67 00:03:12.09 --> 00:03:14.09 you'll have to manually open the gate 68 00:03:14.09 --> 00:03:17.00 and create the elements from within there. 5593