1 00:00:04,390 --> 00:00:05,110 ‫Hello and welcome. 2 00:00:05,110 --> 00:00:09,040 ‫In this lecture, we're going to introduce a new node called the Blend Poses by Boolean, which will 3 00:00:09,040 --> 00:00:12,730 ‫allow us to check a checkbox and kill off our character. 4 00:00:12,730 --> 00:00:14,380 ‫Let's dive in and see how it works. 5 00:00:15,260 --> 00:00:15,500 ‫Okay. 6 00:00:15,530 --> 00:00:20,390 ‫So we want to get our character to die when we reduce the health down to zero. 7 00:00:20,600 --> 00:00:27,650 ‫So the first place we're going to be looking at is an animation blueprint because that is the place 8 00:00:27,650 --> 00:00:32,540 ‫that we're playing our various animations and we want to switch over essentially from playing. 9 00:00:32,540 --> 00:00:38,660 ‫If we go over to our anim graph, we want to switch over from playing this blend space over into playing 10 00:00:38,660 --> 00:00:42,230 ‫a death animation and basically to never go back from there. 11 00:00:42,500 --> 00:00:48,560 ‫So the way we're going to do this is to use a new type of node called a blend by boolean. 12 00:00:48,560 --> 00:00:54,560 ‫So if we right click here and look for the different types of blend that we can get in here, I'm going 13 00:00:54,560 --> 00:00:55,180 ‫to scroll to the top. 14 00:00:55,190 --> 00:00:58,490 ‫There's a whole bunch of blend poses down here that it's selecting for me by default. 15 00:00:58,520 --> 00:01:05,060 ‫Don't know why, but if we do a blend poses by boolean, you can see quite clearly that we've got two 16 00:01:05,060 --> 00:01:08,950 ‫options here a true pose and a false pose. 17 00:01:08,960 --> 00:01:17,240 ‫So basically what we'd want to be doing is to play our BB's blend space locomotion animation when we 18 00:01:17,240 --> 00:01:23,720 ‫are not dead, and otherwise we want to play our dead animation as the true pose. 19 00:01:23,720 --> 00:01:30,050 ‫And then here we've got some options for how how quickly it's going to blend between the two animations 20 00:01:30,050 --> 00:01:32,270 ‫when the Boolean value changes. 21 00:01:32,270 --> 00:01:34,880 ‫Now, in our case, we're not going to have players resurrecting. 22 00:01:34,880 --> 00:01:41,270 ‫So the most likely case is that we're just going to hit that Boolean once and not go back. 23 00:01:41,840 --> 00:01:43,130 ‫So what do we need here? 24 00:01:43,130 --> 00:01:44,690 ‫We need a death animation. 25 00:01:44,690 --> 00:01:49,520 ‫So I'm going to right click and search for death and see if we can find a few ones here. 26 00:01:49,520 --> 00:01:51,170 ‫We've got a death backwards or death forward. 27 00:01:51,170 --> 00:01:55,910 ‫So let's just have a look at the differences between those by going to our animation view and we'll 28 00:01:55,910 --> 00:01:59,120 ‫look for death in there just to preview those animations. 29 00:01:59,120 --> 00:02:01,090 ‫So death backwards. 30 00:02:01,100 --> 00:02:01,730 ‫Let's have a look. 31 00:02:01,850 --> 00:02:02,690 ‫Let's do that again. 32 00:02:02,690 --> 00:02:05,450 ‫So, okay, it's being shot from behind and falling forward. 33 00:02:05,450 --> 00:02:07,400 ‫So it's kind of the opposite of what I would expect. 34 00:02:07,790 --> 00:02:09,980 ‫Death forward is probably the one we want. 35 00:02:10,010 --> 00:02:12,080 ‫Where are you being killed from in front? 36 00:02:12,080 --> 00:02:14,150 ‫I think that's what it's trying to say. 37 00:02:14,390 --> 00:02:16,700 ‫So let's go and open up the death forward. 38 00:02:16,730 --> 00:02:17,240 ‫There you go. 39 00:02:17,240 --> 00:02:19,850 ‫We kind of get shot and fall up backwards. 40 00:02:19,850 --> 00:02:21,030 ‫So that's the one I'm going to want. 41 00:02:21,030 --> 00:02:25,910 ‫I'm just going to dock my shooter animation blueprint to the main window. 42 00:02:26,090 --> 00:02:32,600 ‫And in here, we're going to look for death forward and we're going to play that through the true pose 43 00:02:32,600 --> 00:02:38,600 ‫and then hook up the output pin of the blend poses by bool to the output pose. 44 00:02:38,600 --> 00:02:43,130 ‫If we hit compile now you should see it's playing that BS locomotion. 45 00:02:43,130 --> 00:02:50,180 ‫If I hit the checkbox and recompile, you can see it is playing at death animation but note it's looping. 46 00:02:50,180 --> 00:02:56,150 ‫So one thing we can do here to prevent that is by selecting that node to play death forward, we can 47 00:02:56,150 --> 00:03:04,220 ‫uncheck the loop animation in our details pane over on the right and hit compile and now it should play 48 00:03:04,220 --> 00:03:09,620 ‫the death animation and then come to a rest at the end of it and stop, not go any further from there, 49 00:03:09,620 --> 00:03:11,450 ‫which is exactly what we want here. 50 00:03:12,570 --> 00:03:15,390 ‫It's time for your challenge to add a death boolean. 51 00:03:15,390 --> 00:03:20,430 ‫We've been controlling everything else via those variables on our animation blueprint. 52 00:03:20,430 --> 00:03:25,890 ‫It's time to add a variable to the blueprint for death and whether we are dead or not. 53 00:03:25,890 --> 00:03:33,390 ‫Set the blend based on this variable and then test it without compiling within the blueprint or compile 54 00:03:33,390 --> 00:03:33,750 ‫first. 55 00:03:33,750 --> 00:03:39,600 ‫But you won't have to recompile every time you flip the switch and you should be able to see it switch 56 00:03:39,600 --> 00:03:43,710 ‫between our death animation and our movement animation. 57 00:03:43,710 --> 00:03:49,230 ‫And with that information, you should be able to see whether the timings on that blend node are correct 58 00:03:49,230 --> 00:03:49,740 ‫or not. 59 00:03:49,740 --> 00:03:52,110 ‫So pause the video and have a go. 60 00:03:53,400 --> 00:03:53,650 ‫Okay. 61 00:03:53,730 --> 00:03:54,400 ‫Welcome back. 62 00:03:54,420 --> 00:03:56,580 ‫So hopefully this was fairly simple to do. 63 00:03:56,580 --> 00:03:59,190 ‫Let's go into the variables in the my blueprint pane. 64 00:03:59,190 --> 00:04:00,300 ‫Add a new variable. 65 00:04:00,300 --> 00:04:04,980 ‫It's automatically a boolean for me for some reason and I'm just going to have this as is dead. 66 00:04:05,690 --> 00:04:08,930 ‫And that's going to be the state that we're going to then grab from the character in the next lecture, 67 00:04:08,930 --> 00:04:09,920 ‫not in this lecture. 68 00:04:09,950 --> 00:04:16,820 ‫Going to drag this into our anim graph get is dead and then I'm going to hook it up to our active value 69 00:04:16,940 --> 00:04:18,020 ‫like so. 70 00:04:18,020 --> 00:04:23,600 ‫And now if we compile we should see is dead show up in the anim preview editor over on the right bottom 71 00:04:23,600 --> 00:04:31,430 ‫right and if I check the is dead checkbox then it goes ahead and switches from our locomotion to playing 72 00:04:31,430 --> 00:04:33,200 ‫our death animation. 73 00:04:33,440 --> 00:04:34,160 ‫Fantastic. 74 00:04:34,160 --> 00:04:36,590 ‫So that's what I wanted to achieve in this lecture. 75 00:04:36,590 --> 00:04:40,130 ‫And in the next lecture we're going to hook that up to the actual gameplay.