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These are the user uploaded subtitles that are being translated: 1 00:00:00.05 --> 00:00:02.07 - [Instructor] During a Generative Design study, 2 00:00:02.07 --> 00:00:05.05 Dynamo has to run the same graph many times 3 00:00:05.05 --> 00:00:07.02 to generate different options. 4 00:00:07.02 --> 00:00:10.03 If it needs to access Revit elements with each run, 5 00:00:10.03 --> 00:00:13.07 the computations that are required can be quite heavy. 6 00:00:13.07 --> 00:00:16.05 The Data.Remember node assists with this 7 00:00:16.05 --> 00:00:18.09 by storing data for later use. 8 00:00:18.09 --> 00:00:21.06 So let's take a closer look at it in this lesson. 9 00:00:21.06 --> 00:00:23.06 I currently have the Revit exercise file 10 00:00:23.06 --> 00:00:24.09 open to this lesson, 11 00:00:24.09 --> 00:00:26.08 which simply has a wall in it. 12 00:00:26.08 --> 00:00:29.07 We'll use this wall to test the remember node, 13 00:00:29.07 --> 00:00:34.09 so let's go ahead and open up a new Dynamo script. 14 00:00:34.09 --> 00:00:36.09 The Data.Remember node is found 15 00:00:36.09 --> 00:00:40.05 within the Generative Design section, 16 00:00:40.05 --> 00:00:44.06 and then data, and here's this remember node. 17 00:00:44.06 --> 00:00:46.09 This node can be used to store data 18 00:00:46.09 --> 00:00:50.03 by storing the information within the Dynamo file. 19 00:00:50.03 --> 00:00:53.05 This is however limited to texts, numbers, 20 00:00:53.05 --> 00:00:57.03 and geometric data such as solids, points, and surfaces. 21 00:00:57.03 --> 00:00:59.00 So let's use it to store information 22 00:00:59.00 --> 00:01:01.06 about the wall in Revit. 23 00:01:01.06 --> 00:01:02.07 We can do this by using 24 00:01:02.07 --> 00:01:09.08 the select wall element node in Dynamo. 25 00:01:09.08 --> 00:01:16.00 And then in Dynamo, let's go ahead and select that wall. 26 00:01:16.00 --> 00:01:18.01 So we now have that wall element contained 27 00:01:18.01 --> 00:01:20.04 in this select wall element. 28 00:01:20.04 --> 00:01:24.08 Next, let's plug that into Data.Remember. 29 00:01:24.08 --> 00:01:26.01 It's executed automatically, 30 00:01:26.01 --> 00:01:28.03 because I have automatic set, 31 00:01:28.03 --> 00:01:30.05 and we can see that there's an error. 32 00:01:30.05 --> 00:01:33.01 And this is because the Data.Remember node 33 00:01:33.01 --> 00:01:36.08 cannot store the data of type Revit.Elements.Wall. 34 00:01:36.08 --> 00:01:40.00 That is, it can't store a Revit element. 35 00:01:40.00 --> 00:01:43.02 We can only store information about the wall. 36 00:01:43.02 --> 00:01:46.02 So let's try storing the location of the wall 37 00:01:46.02 --> 00:01:50.06 by first retrieving a get location node, 38 00:01:50.06 --> 00:01:52.09 plugging the wall element into that. 39 00:01:52.09 --> 00:01:55.06 As we can see in the background, 40 00:01:55.06 --> 00:01:57.04 we have retrieved the location of the wall, 41 00:01:57.04 --> 00:02:00.02 which is a line. 42 00:02:00.02 --> 00:02:02.04 Because this is a type of geometry, 43 00:02:02.04 --> 00:02:03.08 we should be able to store it, 44 00:02:03.08 --> 00:02:07.04 so let's put that into the Data.Remember node. 45 00:02:07.04 --> 00:02:09.04 Perfect, so we can see that's now storing 46 00:02:09.04 --> 00:02:11.08 that information about the line. 47 00:02:11.08 --> 00:02:15.09 We can test how this works by saving the file. 48 00:02:15.09 --> 00:02:21.04 I'm going to save mine to desktop as test. 49 00:02:21.04 --> 00:02:24.02 And then closing down Dynamo, 50 00:02:24.02 --> 00:02:27.05 deleting the wall element in Revit, 51 00:02:27.05 --> 00:02:31.04 and then opening up that script. 52 00:02:31.04 --> 00:02:35.00 Perfect, so we can see the select wall element has failed, 53 00:02:35.00 --> 00:02:37.05 because the wall is no longer in Revit, 54 00:02:37.05 --> 00:02:41.01 however the Data.Remember node is still storing information 55 00:02:41.01 --> 00:02:42.07 about that line. 56 00:02:42.07 --> 00:02:46.06 This allows the Generative Design script to execute quickly 57 00:02:46.06 --> 00:02:49.08 by not requiring Dynamo to continually access 58 00:02:49.08 --> 00:02:53.08 the data or the information directly from Revit. 59 00:02:53.08 --> 00:02:57.04 The information is stored within this node. 60 00:02:57.04 --> 00:02:59.03 The remember node also has the benefit 61 00:02:59.03 --> 00:03:02.08 of storing data, which can be used outside of Revit. 62 00:03:02.08 --> 00:03:05.00 So for example, we could open up this script 63 00:03:05.00 --> 00:03:08.05 in Dynamo Studio and still have that Revit data, 64 00:03:08.05 --> 00:03:10.06 or we could send the script to a colleague 65 00:03:10.06 --> 00:03:13.03 without the Revit file, and the data can be stored 66 00:03:13.03 --> 00:03:15.04 and used by that person. 67 00:03:15.04 --> 00:03:16.08 While this node is not required 68 00:03:16.08 --> 00:03:18.04 in the three box masking study, 69 00:03:18.04 --> 00:03:20.06 which we'll continue to look at in this section, 70 00:03:20.06 --> 00:03:24.00 we will take a closer look at it later on in the course. 71 00:03:24.00 --> 00:03:26.01 The important thing to remember here is 72 00:03:26.01 --> 00:03:28.01 if we're using Revit elements 73 00:03:28.01 --> 00:03:30.02 in our Generative Design studies, 74 00:03:30.02 --> 00:03:33.01 we need to store the information about those elements 75 00:03:33.01 --> 00:03:34.09 in a Data.Remember node. 6042