1 00:00:01,150 --> 00:00:07,630 Guys and welcome to expression's what you want to do in this lecture is just understand the referencing 2 00:00:07,630 --> 00:00:10,860 system that is written in expressions. 3 00:00:11,050 --> 00:00:11,930 It's pretty easy. 4 00:00:11,950 --> 00:00:18,820 But your understanding of this concept will help you a lot in creating better expressions and will enable 5 00:00:18,820 --> 00:00:22,670 you to correct many mistakes that might happen with you. 6 00:00:22,700 --> 00:00:27,440 So with that text I call that original text and the text inside is original text. 7 00:00:27,550 --> 00:00:37,700 I will create a simple rectangle by now I would like to use in the content of the text. 8 00:00:37,780 --> 00:00:39,850 There is of course source text. 9 00:00:40,060 --> 00:00:45,040 Let's start using the expression in source text press after alternate and click. 10 00:00:45,130 --> 00:00:48,610 Now I will use always that I'm not going to write anything. 11 00:00:48,850 --> 00:00:55,250 So if I take the pick leap here and pointed at this certain composition here for example you notice 12 00:00:55,330 --> 00:00:57,410 it has written Camp 3. 13 00:00:57,430 --> 00:01:00,030 So it is referencing to this group. 14 00:01:00,160 --> 00:01:07,540 If I click out the text will change to become object comp actually referencing to a comp is actually 15 00:01:07,630 --> 00:01:09,350 referencing to an object. 16 00:01:09,520 --> 00:01:12,810 And this is a composition object and that's pretty cool. 17 00:01:13,150 --> 00:01:19,610 Now if I change this and I go to for example the shape player so I'm going to pick up the shape player 18 00:01:19,660 --> 00:01:23,510 only and I click you notice here you have object layer. 19 00:01:23,770 --> 00:01:26,800 So what is the expression on this camp. 20 00:01:26,830 --> 00:01:29,480 That's a reference to this composition. 21 00:01:29,500 --> 00:01:32,500 It's an object comp layer. 22 00:01:32,620 --> 00:01:35,390 It's a reference to layer shape one. 23 00:01:35,530 --> 00:01:37,420 And this will have a shape point. 24 00:01:37,570 --> 00:01:39,680 And now we have object layer. 25 00:01:39,940 --> 00:01:41,230 That's pretty cool. 26 00:01:41,410 --> 00:01:44,760 Now you have two objects and you know how to reference. 27 00:01:44,910 --> 00:01:52,500 And what happens if I change from Layer 2 to 3 for example says layer 3 does not exist. 28 00:01:52,510 --> 00:01:54,090 It gives the error. 29 00:01:54,160 --> 00:01:56,000 So this is mainly what will happen here. 30 00:01:56,030 --> 00:02:03,610 You have certain references that you typed in let's use the clip and then you change the name and things 31 00:02:03,610 --> 00:02:04,430 will go wrong with you. 32 00:02:04,450 --> 00:02:07,630 So not as the reference is very important. 33 00:02:07,630 --> 00:02:11,860 Let's do that again and take shape player 1. 34 00:02:11,870 --> 00:02:18,950 Now if I come to a shape player 1 and she that to rectangle and changing the name of the letter then 35 00:02:19,020 --> 00:02:20,550 the dash 1. 36 00:02:20,600 --> 00:02:26,010 Now you notice the reference here has changed so this camp is a object composition. 37 00:02:26,090 --> 00:02:30,160 And this one layer is a object layer. 38 00:02:30,170 --> 00:02:31,250 Let's add something else. 39 00:02:31,250 --> 00:02:33,740 Let's go ahead and add two content. 40 00:02:33,770 --> 00:02:37,930 I want to take from the content so let's roll down the content here. 41 00:02:38,000 --> 00:02:45,030 So now this we have content we have a rectangle 1 rectangle Part 1 size position and roundness. 42 00:02:45,100 --> 00:02:54,480 I will come to the clip and go up and try to reference for example on the size now and is here the differences 43 00:02:54,650 --> 00:02:56,440 become very long. 44 00:02:56,630 --> 00:02:58,520 We are referencing to this composition. 45 00:02:58,520 --> 00:03:01,570 That's an object camp layer object layer. 46 00:03:01,760 --> 00:03:08,930 And then you have content rectangle what that is that the hierarchy here content's rectangle one rectangle 47 00:03:08,930 --> 00:03:17,470 path one and size and the same is happening here constant rectangle one rectangle path one and size. 48 00:03:17,480 --> 00:03:22,760 And this is pretty amazing because now you know that the last one is not a reference. 49 00:03:22,850 --> 00:03:28,810 The last one is the value size and the first parameter of size. 50 00:03:29,060 --> 00:03:30,110 That's pretty interesting. 51 00:03:30,110 --> 00:03:33,910 Now you know how to get your references right. 52 00:03:34,070 --> 00:03:39,780 If it's come here and you start playing with it you'll get a better notion about how this works. 53 00:03:39,830 --> 00:03:47,750 If I try for example to a reference to the same text and go to path you have text that path option that 54 00:03:47,750 --> 00:03:55,040 path click out and get narrower because path has no content that can be displayed for example is just 55 00:03:55,580 --> 00:03:56,650 a path. 56 00:03:56,660 --> 00:04:04,920 Now if I change I go to more options and I try to grouping alignment not just now there is grouping 57 00:04:04,920 --> 00:04:12,100 along the zero so it's going to take the first one and here is this text dot more options. 58 00:04:12,140 --> 00:04:13,460 So we are in text. 59 00:04:13,520 --> 00:04:16,390 We are in more options grouping alignment. 60 00:04:16,400 --> 00:04:21,620 That's the property and it's taking the first value here the zero value. 61 00:04:21,620 --> 00:04:25,820 And if you play with it even more you can find out that how transform are. 62 00:04:25,880 --> 00:04:26,990 And this is pretty nice. 63 00:04:27,000 --> 00:04:32,070 Let's go to circle and we have here we worked with size. 64 00:04:32,220 --> 00:04:35,390 Let's go to transform for the laya. 65 00:04:35,460 --> 00:04:42,300 If you pick me up on the position this camp later transform not is the hierarchy here. 66 00:04:44,420 --> 00:04:51,590 Layer contents of course transform is not on the content so it's layer transform and position. 67 00:04:51,590 --> 00:04:52,580 And here you are. 68 00:04:52,820 --> 00:04:58,820 So this is for your understanding this will enable you to write if you want to type them the expressions 69 00:04:58,880 --> 00:05:02,070 and also trouble shooting arrows is very important. 70 00:05:02,210 --> 00:05:06,250 What's important for me is for you to understand what a group also. 71 00:05:06,320 --> 00:05:13,190 For example if I delete transform or I'll delete the position that zero click out. 72 00:05:13,200 --> 00:05:19,640 Now you notice I have an object group why it's a group because transform has many other properties or 73 00:05:19,640 --> 00:05:21,700 many other options under it. 74 00:05:21,740 --> 00:05:24,650 If I use the same here get pass one. 75 00:05:24,680 --> 00:05:30,000 I don't think I can use it but I will try not. 76 00:05:30,050 --> 00:05:35,930 I cannot be good but I can't keep the size and indeed the size. 77 00:05:36,560 --> 00:05:44,300 I will also have a group object group so object group means that under this object there are options 78 00:05:44,420 --> 00:05:48,870 or attributes or properties or even values that you can use. 79 00:05:48,890 --> 00:05:49,800 So here you are. 80 00:05:49,820 --> 00:05:51,080 I hope this was beneficial. 81 00:05:51,080 --> 00:05:53,210 I hope you understood how it works. 82 00:05:53,210 --> 00:05:58,240 How referencing is done and mainly you look at the data here. 83 00:05:58,250 --> 00:06:07,160 This camp dot layer rectangle one dot contains that content again and then the value the values usually 84 00:06:07,160 --> 00:06:14,420 are always in between square brackets for example position you notice position zero here is in between 85 00:06:14,780 --> 00:06:15,310 brackets. 86 00:06:15,320 --> 00:06:18,060 So the zero is in between square brackets. 87 00:06:18,320 --> 00:06:20,570 Let's go and look at something else here. 88 00:06:20,630 --> 00:06:27,340 If we come to this mall I know you have global and not as Global can give you comp name for this. 89 00:06:27,410 --> 00:06:29,270 And this comp for example. 90 00:06:29,270 --> 00:06:36,560 So if you say name and of course here will have an error because comp name is not referencing to anything 91 00:06:36,560 --> 00:06:44,500 and has no content but also it can go to global and say this camp and it will give you object gompa. 92 00:06:44,510 --> 00:06:51,380 So we will be able to use the menus here or the options that we have here to understand what's working 93 00:06:51,450 --> 00:06:52,110 color that. 94 00:06:52,160 --> 00:06:55,850 Is it the depth of the Kallas you have 8 16 and 13. 95 00:06:55,840 --> 00:06:59,390 Do you see them is in the advanced pre-sets. 96 00:06:59,420 --> 00:07:04,910 Thanks very much for listening and I hope this was useful for you this morning understandings will help 97 00:07:04,910 --> 00:07:10,370 you a lot in understanding the expressions and how referencing is made in expressions. 98 00:07:10,430 --> 00:07:11,890 See you in the next lecture.