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These are the user uploaded subtitles that are being translated: 1 00:00:00.05 --> 00:00:01.07 - [Instructor] The generator section 2 00:00:01.07 --> 00:00:03.05 of a generative design script 3 00:00:03.05 --> 00:00:06.01 is where geometry or elements are created 4 00:00:06.01 --> 00:00:09.07 to form a new potential solution within the study. 5 00:00:09.07 --> 00:00:11.05 So given a set of input data, 6 00:00:11.05 --> 00:00:14.01 the generators will generate something in the model, 7 00:00:14.01 --> 00:00:16.01 which can then be evaluated. 8 00:00:16.01 --> 00:00:19.03 I currently have the Revit and Dynamo exercise files open 9 00:00:19.03 --> 00:00:20.02 for this lesson, 10 00:00:20.02 --> 00:00:23.00 which is where we left off from in the last lesson. 11 00:00:23.00 --> 00:00:25.05 The only thing I've updated in our Dynamo file 12 00:00:25.05 --> 00:00:28.00 is I've renamed these sections 13 00:00:28.00 --> 00:00:30.09 so that they're a little bit more descriptive. 14 00:00:30.09 --> 00:00:36.00 We currently have a wall and some window data, 15 00:00:36.00 --> 00:00:39.02 along with two input sliders. 16 00:00:39.02 --> 00:00:41.09 Let's use these to create two generators. 17 00:00:41.09 --> 00:00:44.08 The first will generate points along the wall, 18 00:00:44.08 --> 00:00:45.09 which indicates the location 19 00:00:45.09 --> 00:00:48.01 that will place windows. 20 00:00:48.01 --> 00:00:51.03 The second will generate window volumes at these point 21 00:00:51.03 --> 00:00:53.09 to evaluate the size of the windows. 22 00:00:53.09 --> 00:00:56.02 I've already got the bones of this second generator 23 00:00:56.02 --> 00:00:59.05 with the script under this Generators section. 24 00:00:59.05 --> 00:01:02.00 We will need to update some of the inputs, however. 25 00:01:02.00 --> 00:01:04.09 So first, let's focus on the first generator. 26 00:01:04.09 --> 00:01:06.04 To generate the location points 27 00:01:06.04 --> 00:01:08.09 for the windows, we can use the location line 28 00:01:08.09 --> 00:01:10.05 of the wall to create points 29 00:01:10.05 --> 00:01:13.01 at equal lengths along the curve 30 00:01:13.01 --> 00:01:14.02 and to do that, 31 00:01:14.02 --> 00:01:18.05 we can use the PointsAtEqualSegmentLength's node. 32 00:01:18.05 --> 00:01:21.02 To find that node, let's right click the canvas 33 00:01:21.02 --> 00:01:25.00 and we'll search PointsAtEqualSegmentLength. 34 00:01:25.00 --> 00:01:28.01 Here it is. 35 00:01:28.01 --> 00:01:29.06 This node requires a curve 36 00:01:29.06 --> 00:01:31.05 and we can use that curve we retrieved 37 00:01:31.05 --> 00:01:33.06 in the last lesson, 38 00:01:33.06 --> 00:01:37.03 which should be in this Data Remember node here. 39 00:01:37.03 --> 00:01:38.05 So let's select that 40 00:01:38.05 --> 00:01:42.04 and we'll place it into the curve input. 41 00:01:42.04 --> 00:01:45.00 For the divisions or the second input, 42 00:01:45.00 --> 00:01:47.06 we want the number of segments along the curve 43 00:01:47.06 --> 00:01:49.00 and for this, we have the slider 44 00:01:49.00 --> 00:01:52.08 that we created, which is named Number Of Wall Segments. 45 00:01:52.08 --> 00:01:57.06 So let's select that and place it into the node. 46 00:01:57.06 --> 00:01:58.07 To view what this looks like, 47 00:01:58.07 --> 00:02:00.00 we can run the script. 48 00:02:00.00 --> 00:02:01.06 However, it's not going to work at the moment 49 00:02:01.06 --> 00:02:04.00 because we haven't selected a wall. 50 00:02:04.00 --> 00:02:07.07 So in Revit, let's use the Select Wall Element node 51 00:02:07.07 --> 00:02:11.07 and select the blank wall. 52 00:02:11.07 --> 00:02:13.00 Perfect. 53 00:02:13.00 --> 00:02:15.02 Now when we run our script, 54 00:02:15.02 --> 00:02:17.03 we can see the wall in the background. 55 00:02:17.03 --> 00:02:19.08 I'm going to switch my script to Auto 56 00:02:19.08 --> 00:02:21.08 so it updates automatically. 57 00:02:21.08 --> 00:02:26.01 And then I'm going to hide this wall geometry 58 00:02:26.01 --> 00:02:27.04 by right clicking the node 59 00:02:27.04 --> 00:02:29.07 and unselecting Preview. 60 00:02:29.07 --> 00:02:32.06 And I'll do the same for the Data Remember node. 61 00:02:32.06 --> 00:02:36.03 So now we can see that we have divided the wall 62 00:02:36.03 --> 00:02:37.08 into two segments, 63 00:02:37.08 --> 00:02:40.00 which is why there is one point on the line. 64 00:02:40.00 --> 00:02:43.02 And when we update the Number of Wall Segments node, 65 00:02:43.02 --> 00:02:47.09 we can see that changes. 66 00:02:47.09 --> 00:02:49.07 This is the first generator, 67 00:02:49.07 --> 00:02:52.07 which will allow the generative design study 68 00:02:52.07 --> 00:02:55.06 to generate different iterations of how many points 69 00:02:55.06 --> 00:02:58.00 are generated along the curve. 70 00:02:58.00 --> 00:03:01.02 That is how many windows are generated on the curve. 71 00:03:01.02 --> 00:03:02.04 So with these points, 72 00:03:02.04 --> 00:03:04.00 we can now generate the volumes 73 00:03:04.00 --> 00:03:05.06 of the windows, which we can use 74 00:03:05.06 --> 00:03:09.00 to determine whether windows are overlapping or not. 75 00:03:09.00 --> 00:03:09.09 For these volumes, 76 00:03:09.09 --> 00:03:14.01 we'll use this Cuboid By Lengths node here. 77 00:03:14.01 --> 00:03:16.02 First though, they need to be translated 78 00:03:16.02 --> 00:03:19.07 or moved up so that they are not positioned on the ground 79 00:03:19.07 --> 00:03:23.06 and this can be done with this Geometry.Translate node. 80 00:03:23.06 --> 00:03:26.07 So let's plug our points into this node, 81 00:03:26.07 --> 00:03:28.08 which is the geometry input. 82 00:03:28.08 --> 00:03:30.08 So now we can see in the background, 83 00:03:30.08 --> 00:03:32.04 our points have moved up 84 00:03:32.04 --> 00:03:36.02 and so let's update the Cuboid By Lengths node. 85 00:03:36.02 --> 00:03:39.05 For that, we need a width and height. 86 00:03:39.05 --> 00:03:42.00 And this is where we can use the width 87 00:03:42.00 --> 00:03:43.02 and height information 88 00:03:43.02 --> 00:03:46.09 that we retrieved in the last lesson. 89 00:03:46.09 --> 00:03:49.08 Using the List.GetItemAtIndex node, 90 00:03:49.08 --> 00:03:53.07 let's put the width into the width input 91 00:03:53.07 --> 00:03:58.05 and the height into the height input. 92 00:03:58.05 --> 00:04:01.06 Now if we preview the Cuboid By Lengths node, 93 00:04:01.06 --> 00:04:05.03 we can see we have two volumes in the background. 94 00:04:05.03 --> 00:04:07.03 When we update the window type, 95 00:04:07.03 --> 00:04:12.07 those volumes should change. 96 00:04:12.07 --> 00:04:14.05 We now have the generators set up 97 00:04:14.05 --> 00:04:18.01 to create the geometry needed to evaluate our designs. 98 00:04:18.01 --> 00:04:20.03 Next, let's look at how we can determine 99 00:04:20.03 --> 00:04:22.03 or evaluate whether one design 100 00:04:22.03 --> 00:04:24.03 is better or worse than the next. 7805