1 00:00:06,040 --> 00:00:13,680 Are right ladies and gentlemen let's take a look at what's called I.K. constraint or inverse kinematics. 2 00:00:13,680 --> 00:00:20,130 Now you're probably wondering what the heck is what the heck did he just say yet inverse kinematics 3 00:00:20,130 --> 00:00:26,520 So what that is is basically a constraint that allows for us to move a bone and for other surrounding 4 00:00:26,520 --> 00:00:29,280 bones to be affected by it as well. 5 00:00:29,340 --> 00:00:39,200 For example if you move your hand your your your forearm and your bicep will have to move as well if 6 00:00:39,270 --> 00:00:40,800 you move your hand. 7 00:00:40,810 --> 00:00:46,950 However we don't want to need to rotate these individually to get that result. 8 00:00:47,010 --> 00:00:54,480 So I can't constraint basically allows for us to manipulate our whole hand forearm and upper arm with 9 00:00:54,480 --> 00:00:56,270 just one bone. 10 00:00:56,370 --> 00:00:57,000 Really cool. 11 00:00:57,010 --> 00:01:00,160 So let's take a look at how it works. 12 00:01:00,180 --> 00:01:02,510 First hitting tab to go into edit mode. 13 00:01:02,730 --> 00:01:04,650 Let's shift right quick. 14 00:01:04,650 --> 00:01:10,550 All of these and then shift right click this bone right here and then hit Control P and we're going 15 00:01:10,550 --> 00:01:13,830 to parent it by keeping the offset. 16 00:01:13,860 --> 00:01:17,450 So now those bones should be Parenthood to the hand right here. 17 00:01:17,490 --> 00:01:19,640 And that's exactly what we want. 18 00:01:20,900 --> 00:01:29,180 Now with the hand still selected hitting tab to go into edit mode let's hit shift d to copy it right 19 00:01:29,180 --> 00:01:33,090 click to put it down and then going to the bone options. 20 00:01:33,320 --> 00:01:40,200 Let's rename this to I k underscore hand dot L.. 21 00:01:42,070 --> 00:01:47,560 Now what we wanna do is couple of things we want to and check the parents. 22 00:01:47,580 --> 00:01:54,750 So delete the parent and also uncheck the deform. 23 00:01:55,250 --> 00:02:01,340 Now I'm just going to grab the tip of the I.K. hand and hit G to bring it out so that I could see the 24 00:02:01,340 --> 00:02:05,530 difference between the hand and the I.K. hand. 25 00:02:06,020 --> 00:02:09,570 Now selecting this forearm bone in pose mode. 26 00:02:09,590 --> 00:02:13,040 Let's go ahead and go to the constraints. 27 00:02:13,670 --> 00:02:17,100 We're going to add a constrained inverse kinematics. 28 00:02:17,150 --> 00:02:19,550 That's a mouthful right there. 29 00:02:19,550 --> 00:02:25,440 Now if I grab the I can hand the L and grab it to move it. 30 00:02:25,490 --> 00:02:30,550 You can see that nothing has happened because I haven't set that target yet. 31 00:02:30,800 --> 00:02:32,060 I'm jumping ahead of myself. 32 00:02:32,060 --> 00:02:34,020 Ladies and gentlemen. 33 00:02:34,220 --> 00:02:38,500 All right let's select target armature bone. 34 00:02:38,980 --> 00:02:42,380 I k hand dot L. 35 00:02:42,490 --> 00:02:50,130 Now if I grab the I.K. and make me look like a fool you can see that everything moves along with it. 36 00:02:50,140 --> 00:02:55,230 But we have one problem is that everything moves along with it. 37 00:02:55,660 --> 00:03:01,960 So if I select like this let's take a look at this option that we have here called chain length. 38 00:03:01,960 --> 00:03:03,320 Now the chain length. 39 00:03:03,370 --> 00:03:08,650 Basically it restricts how many bones will be affected by this. 40 00:03:08,650 --> 00:03:18,100 If I set it to two and grab my bone you can see that now we're getting something which is pretty cool. 41 00:03:19,200 --> 00:03:24,870 Now keep in mind that if you grab this and your armature goes completely crazy in Haywire it's because 42 00:03:25,200 --> 00:03:31,920 you need to make sure to delete the parent and the deform on the I.K. hand because it needs to be completely 43 00:03:31,920 --> 00:03:33,700 separate from our mesh. 44 00:03:35,380 --> 00:03:36,790 Now we got one thing though. 45 00:03:36,820 --> 00:03:37,830 If I like this. 46 00:03:37,870 --> 00:03:41,360 And you could see that first of all it's not moving around with the bone. 47 00:03:41,380 --> 00:03:45,620 And also if I rotate it our hand isn't rotating with it. 48 00:03:45,700 --> 00:03:48,790 So let's go ahead and fix that quickly. 49 00:03:48,790 --> 00:03:54,950 Selecting the hand not the I.K. hand but the actual hand going to the constraints. 50 00:03:55,180 --> 00:03:59,540 Let's add a constraint and select copy rotation. 51 00:03:59,560 --> 00:04:06,250 Now the Tori is going to be armature and the bone is going to be I.K. hand dot L.. 52 00:04:06,350 --> 00:04:12,110 And now if I say like this grab it you like grab it and rotate it. 53 00:04:12,140 --> 00:04:19,990 And the hand follows along and I can basically pose my hand with just this one bone. 54 00:04:20,060 --> 00:04:21,980 Pretty awesome. 55 00:04:22,340 --> 00:04:31,910 So that's basically the I.K. hand bone constraint and it allows for us to like I said you know basically 56 00:04:31,970 --> 00:04:36,710 move our entire hand and arm with just a single bone. 57 00:04:36,740 --> 00:04:37,670 Pretty cool. 58 00:04:37,770 --> 00:04:40,130 And I mean I just I love this. 59 00:04:40,130 --> 00:04:49,750 It's just so it's I feel like a kid in a toy factory right now it's just it's it's pretty cool. 60 00:04:49,750 --> 00:04:56,460 And trust me it's far more going to our parents our character to the bones and start animating him. 61 00:04:56,480 --> 00:05:02,460 So let's actually copy this over to this side right here. 62 00:05:02,570 --> 00:05:08,030 And the way I'm going to do that is basically I'm just going to select all these 63 00:05:11,620 --> 00:05:20,430 go ahead and delete bones like this one shift as cursor to selected change a pivot point a 3D cursor 64 00:05:21,550 --> 00:05:35,500 and then select all these right here shift the x x negative one control an recalculate them to global 65 00:05:35,570 --> 00:05:41,620 Z-axis and then go to armature and flip names. 66 00:05:41,650 --> 00:05:45,370 I had forgotten that we needed to add to the constraint. 67 00:05:45,370 --> 00:05:53,900 So it's good thing that we added it over here because now we have it on both some parts of the hand. 68 00:05:59,120 --> 00:06:06,220 And then also for this right here could see that we could grab it. 69 00:06:06,220 --> 00:06:15,800 We can even rotate it right here we're getting a funky thing happening because it's around the 3D cursor 70 00:06:15,810 --> 00:06:18,740 so make sure that you always put it back to median point. 71 00:06:18,930 --> 00:06:24,740 But if I go to top view you can see that now we could fully animate our character. 72 00:06:25,050 --> 00:06:30,110 Now you're probably wondering Alex when does the character animation come in. 73 00:06:30,120 --> 00:06:34,020 Because right now I just got empty bow and it's like a skeleton. 74 00:06:34,320 --> 00:06:35,990 All right let's get right to it. 75 00:06:36,170 --> 00:06:43,290 The next story and we'll be actually putting this bone to good use and putting it onto our character 76 00:06:43,470 --> 00:06:46,220 so that he can start moving. 77 00:06:46,230 --> 00:06:48,130 Now one last thing I want to do here. 78 00:06:48,240 --> 00:06:55,560 As you can see it right here when I rotate this bottom bone the arms follow but I want them to be printed 79 00:06:55,570 --> 00:07:00,580 to this one so when I rotate this one the arms follow so hitting tab to go on to edit mode. 80 00:07:00,730 --> 00:07:08,850 So like these two bones Schiffner I click this one control P keep the offset and there we go. 81 00:07:08,850 --> 00:07:13,380 So now we have these ones following along. 82 00:07:13,380 --> 00:07:17,690 I call See you in the next Tauriel and also for the eyes. 83 00:07:17,700 --> 00:07:24,640 We want to parent those as well so hold our dough head off to the next Tauriel just yet. 84 00:07:25,410 --> 00:07:29,370 Let's select this bone right here. 85 00:07:30,150 --> 00:07:34,790 So we could get a hold of it shift right click this one as well. 86 00:07:34,790 --> 00:07:38,700 SCHIEFFER I click I want control P keep the offset. 87 00:07:42,050 --> 00:07:49,880 Now if I rotate this you can see that rotating our eyeballs which obviously they're rotating out of 88 00:07:49,880 --> 00:07:54,750 his head and we don't want that but we're going to have the character follow along with that as well. 89 00:07:54,950 --> 00:08:02,420 And then we want to have this one pair to this Control P keep the offset. 90 00:08:02,420 --> 00:08:07,210 And now we have all of those following along quite nicely. 91 00:08:07,430 --> 00:08:16,520 And let's now go ahead to the next part of the Tauriel and see about parenting our character to the 92 00:08:16,550 --> 00:08:17,270 bones. 93 00:08:17,270 --> 00:08:18,560 All right I'll see you there. 94 00:08:18,560 --> 00:08:20,780 Ciao. 95 00:08:20,840 --> 00:08:24,460 Look a quilt made its way into our video. 96 00:08:24,500 --> 00:08:27,510 I don't know how that got there. 97 00:08:27,950 --> 00:08:31,590 Take away time and space and you'll have nothing left to chase. 98 00:08:31,670 --> 00:08:36,220 It's all an illusion created by these two to believe in them isn't true. 99 00:08:36,230 --> 00:08:41,690 Strip them away and you will see that the very universe is in both you and me. 100 00:08:41,840 --> 00:08:42,940 All right ladies and gentlemen. 101 00:08:42,950 --> 00:08:44,680 Sounds very philosophical. 102 00:08:44,690 --> 00:08:47,910 But you know it is. 103 00:08:48,560 --> 00:08:52,650 So ponder it ponder it well Ciao for now.