1 00:00:04,400 --> 00:00:05,510 ‫Hello and welcome. 2 00:00:05,510 --> 00:00:11,210 ‫In this lecture, we're going to be setting up our own little obstacle assault course, and we're going 3 00:00:11,210 --> 00:00:16,340 ‫to be implementing these little pusher platforms here that will push our character off. 4 00:00:16,340 --> 00:00:22,250 ‫We're going to have to implement a few little fixes to our character class in order to do this. 5 00:00:22,250 --> 00:00:24,650 ‫So let's dive in and see what they are. 6 00:00:25,340 --> 00:00:32,390 ‫So another type of puzzle I'd like to include using this basic moving platform component is to have 7 00:00:32,390 --> 00:00:35,690 ‫a pusher that will basically push us off of a ledge. 8 00:00:35,870 --> 00:00:39,470 ‫Now, the way that I want to do this is take this cube here. 9 00:00:39,470 --> 00:00:45,770 ‫I think it's called Puzzle Cube A, and that can be the cube that is essentially the pusher. 10 00:00:45,770 --> 00:00:50,360 ‫And we're going to configure it slightly differently from the moving platform. 11 00:00:50,360 --> 00:00:57,230 ‫So let's go ahead and navigate back to our platform so I can right click and actually go click go here, 12 00:00:57,230 --> 00:01:00,380 ‫which takes my camera kind of to focus on it. 13 00:01:00,800 --> 00:01:08,360 ‫And then what we can do is go to our content, draw to the C++ classes, click my search, go to Obstacle 14 00:01:08,360 --> 00:01:12,410 ‫Salt, right click on the moving platform and create a new blueprint class based on it. 15 00:01:12,410 --> 00:01:18,110 ‫This time I'm going to call it the BP underscore pushing cube like. 16 00:01:18,110 --> 00:01:22,580 ‫So I'm going to put it in the route of content and click Create Blueprint Class. 17 00:01:22,790 --> 00:01:24,140 ‫Now I can close my content browser. 18 00:01:24,140 --> 00:01:29,510 ‫I'm not sure why it keeps wanting to bring that one up and I'm going to go to the content draw, go 19 00:01:29,510 --> 00:01:36,170 ‫to the root of content, and search for the puzzle cube or one word, and we're looking for the puzzle 20 00:01:36,170 --> 00:01:36,500 ‫cube. 21 00:01:36,530 --> 00:01:38,390 ‫Ay so that's this one here, the mesh. 22 00:01:38,390 --> 00:01:44,900 ‫I'm going to drag in to our blueprint class and then close the content, draw close my compile results 23 00:01:44,900 --> 00:01:46,640 ‫so I can see the viewport a little bit better. 24 00:01:46,760 --> 00:01:50,690 ‫And I actually want to scale this cube up because by default it's actually quite small. 25 00:01:50,690 --> 00:01:54,230 ‫I'm going to make it at least ten times bigger in every dimension. 26 00:01:54,230 --> 00:02:00,620 ‫So I'm going to hit a little padlock next to the scale property so that each of these basically scales 27 00:02:00,620 --> 00:02:01,220 ‫the same. 28 00:02:01,220 --> 00:02:05,930 ‫And I'm going to change one of them to ten, and then the other two will scale up to ten as well. 29 00:02:06,320 --> 00:02:10,220 ‫And then what I'm going to do is I'm going to change the direction of movement. 30 00:02:10,220 --> 00:02:12,830 ‫So it's currently moving in the X direction. 31 00:02:12,830 --> 00:02:16,100 ‫And if we look in our scene, you can see that that's basically the forward direction. 32 00:02:16,100 --> 00:02:17,540 ‫I want to move it side to side. 33 00:02:17,540 --> 00:02:22,160 ‫Obviously, we could rotate it once we put it in the scene and it wouldn't matter so much, but I'm 34 00:02:22,160 --> 00:02:29,660 ‫going to change it to zero in the X and it needs to be reasonably fast for it to be an obstacle that 35 00:02:29,660 --> 00:02:30,440 ‫we need to avoid. 36 00:02:30,440 --> 00:02:35,450 ‫So I'm going to make it 300 and I'm going to make the move distance fairly large too. 37 00:02:35,450 --> 00:02:38,000 ‫So going to make it at least 500 to start with. 38 00:02:38,000 --> 00:02:42,620 ‫And obviously this can be then configured again once we place this in the level. 39 00:02:42,620 --> 00:02:47,630 ‫So let's save that, go into our level and try and place this cube. 40 00:02:47,630 --> 00:02:53,150 ‫I'm going to cancel out my search in the content draw, go to the root of content and drag in a pushing 41 00:02:53,150 --> 00:02:53,720 ‫cube. 42 00:02:53,720 --> 00:02:55,010 ‫It's absolutely massive. 43 00:02:55,010 --> 00:02:56,930 ‫I definitely got the scale way off. 44 00:02:56,930 --> 00:03:00,530 ‫So let's go back to the Blueprint class for the push in Cube. 45 00:03:00,560 --> 00:03:06,080 ‫Go look at the scale property and maybe we just want to make it four times larger and note that I'm 46 00:03:06,080 --> 00:03:07,940 ‫doing this with this scale lock on. 47 00:03:07,940 --> 00:03:13,430 ‫So I'm making it four times larger in every dimension and go back into the level. 48 00:03:13,430 --> 00:03:15,560 ‫And this is looking a lot more reasonable now. 49 00:03:15,560 --> 00:03:18,530 ‫So you can see that it's actually clipping into the ground a little bit. 50 00:03:18,560 --> 00:03:25,910 ‫So what we can do is we could either solve this by lifting up the cube in the world, or we could do 51 00:03:25,910 --> 00:03:31,010 ‫it once and for all and actually lift it up in the Pushing Cube class instead. 52 00:03:31,010 --> 00:03:34,490 ‫So I think we're going to need to lift it up by about. 53 00:03:34,490 --> 00:03:37,040 ‫Let's start dragging up and see what looks sane. 54 00:03:37,040 --> 00:03:40,610 ‫I think about 200 puts it on the ground plane. 55 00:03:41,090 --> 00:03:44,000 ‫So save that and go back into our scene. 56 00:03:44,000 --> 00:03:44,600 ‫And there you go. 57 00:03:44,600 --> 00:03:46,340 ‫It looks like it is correct. 58 00:03:46,340 --> 00:03:49,520 ‫Now I'm just going to move it so that it's going to overlap with our player. 59 00:03:49,850 --> 00:03:52,840 ‫Let's go ahead and hit play and you can see it's moving backwards and forwards. 60 00:03:52,840 --> 00:03:55,100 ‫It's not moving very far backwards and forwards. 61 00:03:55,100 --> 00:03:56,750 ‫So I think we do need to change that. 62 00:03:56,750 --> 00:04:02,270 ‫Let's go back to the class, go to the class, defaults and make the move distance. 63 00:04:02,270 --> 00:04:06,680 ‫I think it's going to need to be at least 1500 like so. 64 00:04:06,680 --> 00:04:11,720 ‫And we might want to set the move direction in the opposite direction, although that could just be 65 00:04:11,720 --> 00:04:12,980 ‫a matter of preference. 66 00:04:12,980 --> 00:04:17,870 ‫So let's go back to our main window and drag the cube over to the left instead, because that's the 67 00:04:17,870 --> 00:04:19,520 ‫direction it's going to be moving in. 68 00:04:19,940 --> 00:04:20,720 ‫Let's hit play. 69 00:04:20,720 --> 00:04:21,560 ‫And there we go. 70 00:04:21,560 --> 00:04:24,290 ‫It's going past very slowly. 71 00:04:24,290 --> 00:04:26,240 ‫So I'm not happy with the speed. 72 00:04:26,270 --> 00:04:28,220 ‫Let's change that speed. 73 00:04:28,220 --> 00:04:29,990 ‫I think it needs to be at least three times fast. 74 00:04:30,000 --> 00:04:32,060 ‫So let's make it 900 hit play. 75 00:04:32,060 --> 00:04:32,780 ‫And there you go. 76 00:04:32,780 --> 00:04:35,120 ‫We've got a bit more of a challenge. 77 00:04:35,120 --> 00:04:37,790 ‫However, we've also got a bug. 78 00:04:37,800 --> 00:04:43,730 ‫Our character doesn't really get pushed in a very sensible or nice way by this pushing cube. 79 00:04:43,730 --> 00:04:45,080 ‫You can see it glitches. 80 00:04:45,080 --> 00:04:46,790 ‫It's not smooth. 81 00:04:46,820 --> 00:04:50,180 ‫However, I would like to draw your attention to a little workaround. 82 00:04:50,180 --> 00:04:56,780 ‫If I'm trying to move while it hits me, you notice that it actually does it all very smoothly, and 83 00:04:56,780 --> 00:05:03,650 ‫that is because the character code doesn't actually check for collisions unless you are trying to move. 84 00:05:03,870 --> 00:05:07,460 ‫So there's a little bit of a workaround for us to do this. 85 00:05:07,470 --> 00:05:11,930 ‫We're going to go to our BP third person character that we've created. 86 00:05:11,940 --> 00:05:17,220 ‫Now, the way you can get to this is either via the content draw or you can select the character in 87 00:05:17,220 --> 00:05:22,680 ‫the scene, go to the details pane, go to the Blueprint button and hit Open Blueprint Editor. 88 00:05:23,130 --> 00:05:29,760 ‫And what we want to do is essentially every single tick, we want to move the character a little bit 89 00:05:29,760 --> 00:05:33,090 ‫to the left and then a little bit back to the right. 90 00:05:33,090 --> 00:05:38,640 ‫Now, the way we're going to do this is using a component on the character called the character movement 91 00:05:38,640 --> 00:05:39,150 ‫component. 92 00:05:39,150 --> 00:05:45,360 ‫So select that in the components pane, then right click in your Blueprint Event graph and then search 93 00:05:45,360 --> 00:05:49,290 ‫for move updated component. 94 00:05:50,220 --> 00:05:53,580 ‫Essentially what this function does is it tells. 95 00:05:54,360 --> 00:06:01,350 ‫The movement component that it should use its character movement rules to move the character around. 96 00:06:01,800 --> 00:06:08,640 ‫So you can see that it takes a delta which basically says, this is how far you should move. 97 00:06:08,790 --> 00:06:16,350 ‫And it has a sweep, which tells us that it should look out for any collisions along the way. 98 00:06:16,530 --> 00:06:23,610 ‫So we can make it do a very straightforward movement of basically one centimetre in the X and Y. 99 00:06:23,640 --> 00:06:27,690 ‫It doesn't so much matter whether it moves in the Z because we're not looking for those collisions, 100 00:06:27,690 --> 00:06:28,320 ‫really. 101 00:06:28,650 --> 00:06:34,050 ‫Then we can take the tick and drag the execution pin into our move. 102 00:06:34,050 --> 00:06:35,370 ‫Updated components. 103 00:06:35,700 --> 00:06:41,480 ‫And if we left it like this, it would be problematic because gradually our character would be drifting. 104 00:06:41,490 --> 00:06:43,410 ‫Let me show you if I hit play. 105 00:06:43,860 --> 00:06:49,470 ‫You can see that the character is gradually one centimetre at a frame at a time, is drifting his way 106 00:06:49,470 --> 00:06:50,450 ‫across the scene. 107 00:06:50,460 --> 00:06:53,660 ‫So what we need to do is also move back. 108 00:06:53,670 --> 00:06:59,490 ‫So dragging a character movement component down here, I'm going to drag off of this pin again and look 109 00:06:59,490 --> 00:07:00,840 ‫again for the move. 110 00:07:00,840 --> 00:07:02,430 ‫Updated components. 111 00:07:02,580 --> 00:07:08,520 ‫I'm going to thread in the execution pin so that it gets called after the first move updated component. 112 00:07:08,520 --> 00:07:14,880 ‫And then I'm going to make the delta minus one in the X and minus one in the Y. 113 00:07:14,910 --> 00:07:21,330 ‫So the end result will be that nothing seems to have happened, however, because we've forced the movement 114 00:07:21,330 --> 00:07:28,250 ‫component to look for these collisions with the sweep, it's going to react smoothly to the pusher. 115 00:07:28,260 --> 00:07:33,840 ‫So let's go ahead and hit play and go and stand in the path of our pusher. 116 00:07:34,020 --> 00:07:39,440 ‫And you can see we very smoothly get nudged just out of the way, like so. 117 00:07:39,450 --> 00:07:46,110 ‫So I'd like to challenge you to make an obstacle course of your own using this pusher and moving platform 118 00:07:46,110 --> 00:07:47,790 ‫components that we've put together here. 119 00:07:47,820 --> 00:07:52,350 ‫So here's the example of the obstacle course that I've made in my prototype. 120 00:07:52,350 --> 00:07:57,300 ‫You can see I've got some moving platforms to raise me up onto a little island so you can use one of 121 00:07:57,300 --> 00:07:59,970 ‫these islands and scale it down as a platform. 122 00:07:59,970 --> 00:08:04,610 ‫And then I've got the pushers moving backwards and forwards that I have to make my way through. 123 00:08:04,620 --> 00:08:07,350 ‫And then there's rotating platforms, but we're going to get to that later. 124 00:08:07,350 --> 00:08:08,190 ‫So don't worry. 125 00:08:08,190 --> 00:08:12,060 ‫But we've got these pushers and we've got the moving platforms, so have a go. 126 00:08:12,060 --> 00:08:16,680 ‫You can try and replicate this, or if you're feeling creative and want to try something different, 127 00:08:16,680 --> 00:08:22,260 ‫then please go ahead and create your own obstacle course because that's always really exciting to see. 128 00:08:22,260 --> 00:08:27,390 ‫And if you do create something unique, please share it in the discussions so that we can all have a 129 00:08:27,390 --> 00:08:28,920 ‫look and get inspired. 130 00:08:28,920 --> 00:08:30,870 ‫So pause the video and have a go. 131 00:08:33,820 --> 00:08:34,450 ‫Okay. 132 00:08:34,450 --> 00:08:35,260 ‫Welcome back. 133 00:08:35,260 --> 00:08:40,730 ‫So now that we've got our pushers working, let's make something a bit interesting, shall we? 134 00:08:40,750 --> 00:08:44,080 ‫So I'm going to take this platform and actually rotate it around. 135 00:08:44,080 --> 00:08:50,710 ‫So we've got a bit more length to our to our setup, and I'm going to drag it along. 136 00:08:50,710 --> 00:08:57,160 ‫So the character is right at the end of the platform, and then I'm going to take these two moving platforms 137 00:08:57,160 --> 00:08:59,560 ‫and position them one after the other. 138 00:08:59,560 --> 00:09:09,280 ‫And one of them, I'm going to add 1000 to its Z axis and I'm going to send it moving in the opposite 139 00:09:09,280 --> 00:09:10,180 ‫direction. 140 00:09:10,180 --> 00:09:13,990 ‫So these two platforms should meet somewhere around the middle. 141 00:09:14,050 --> 00:09:17,890 ‫Then I'm going to duplicate the floating island that we're standing on. 142 00:09:17,890 --> 00:09:24,670 ‫So by alt clicking and dragging, I'm going to rotate it just so it doesn't immediately look obviously 143 00:09:24,670 --> 00:09:32,410 ‫the same platform and I drag it out and I'm going to rescale it a little bit so that we can fit it on 144 00:09:32,410 --> 00:09:34,030 ‫top of the other platform. 145 00:09:34,030 --> 00:09:40,210 ‫Because ultimately what I want to happen is that once we get on top of this upper platform, we get 146 00:09:40,210 --> 00:09:42,760 ‫pushed down so we don't die. 147 00:09:42,760 --> 00:09:45,190 ‫But it gives us a bit of a setback. 148 00:09:45,280 --> 00:09:47,110 ‫Now, I'm going to take these pusher cubes. 149 00:09:47,110 --> 00:09:52,630 ‫I'm going to actually just drag them in on to the upper platform. 150 00:09:52,840 --> 00:09:54,190 ‫I'm going to put a few of them in. 151 00:09:54,190 --> 00:09:58,810 ‫So I think three is enough for the time being, and I'm going to drag one of them over to the other 152 00:09:58,810 --> 00:10:03,190 ‫side and flip its velocity like so. 153 00:10:03,190 --> 00:10:07,870 ‫So instead of being nine, it's going to be -900 and we're going to go in the opposite direction. 154 00:10:08,080 --> 00:10:12,400 ‫Let's try this out so I can get up onto these moving platforms. 155 00:10:12,400 --> 00:10:19,750 ‫They allow me to have a bit of a ladder up here and now I have to try and get past these guys. 156 00:10:19,750 --> 00:10:25,390 ‫And interestingly, I just noticed a little bit of a bug with the way that we're forcing our character 157 00:10:25,390 --> 00:10:27,670 ‫to move and will cover that in just a second. 158 00:10:27,880 --> 00:10:30,640 ‫But yeah, it's a little bit challenging, but it is doable. 159 00:10:30,640 --> 00:10:31,840 ‫We could definitely get through those. 160 00:10:31,840 --> 00:10:35,680 ‫I'm not doing it very well at the moment, but we could definitely get through those cubes if we wanted 161 00:10:35,680 --> 00:10:36,190 ‫to. 162 00:10:36,190 --> 00:10:39,310 ‫So the next thing to do is fix that little bug. 163 00:10:39,670 --> 00:10:47,170 ‫Now the issue here is that when we called move updated component, we're setting a rotation in here 164 00:10:47,170 --> 00:10:52,330 ‫that is not our character's rotation, which means that it's always going to put us facing forwards. 165 00:10:52,510 --> 00:11:02,620 ‫So the easy way to fix this is to right click and do get actor rotation and simply pass the actor rotation 166 00:11:02,620 --> 00:11:05,950 ‫in to the new rotation four Move Updated Component. 167 00:11:05,950 --> 00:11:09,970 ‫You can pass it in to both of them, but the one that really matters is that we'd be doing it for the 168 00:11:09,970 --> 00:11:16,360 ‫last one so we can go ahead and play now and we should be able to see that we can indeed now rotate 169 00:11:16,360 --> 00:11:18,670 ‫our character as appropriate. 170 00:11:18,880 --> 00:11:19,900 ‫Well, great stuff. 171 00:11:19,900 --> 00:11:26,770 ‫In this lecture we have fixed a little bit of a collision bug with our character and we've set up a 172 00:11:26,770 --> 00:11:31,270 ‫little bit of an obstacle assault course for us to get started. 173 00:11:31,270 --> 00:11:33,850 ‫I hope you've had fun and I'll see you in the next lecture.