1 00:00:04,500 --> 00:00:05,670 ‫Hello and welcome. 2 00:00:05,670 --> 00:00:12,690 ‫In this lecture, we're going to be looking at how we can get the rotation of our camera and apply that 3 00:00:12,690 --> 00:00:14,310 ‫to the spawned projectiles. 4 00:00:14,310 --> 00:00:20,700 ‫So as I rotate my camera around, you can see the projectiles are being rotated in the same direction. 5 00:00:21,330 --> 00:00:28,290 ‫So you'll notice that there is a rotation that we can put in to our projectile. 6 00:00:28,470 --> 00:00:36,210 ‫Now, this may be the start of helping us rotate the direction of travel of that projectile. 7 00:00:36,210 --> 00:00:42,390 ‫We can use the we can use some information from the projectile later on to actually set our impulse 8 00:00:42,390 --> 00:00:43,590 ‫in the correct direction. 9 00:00:44,220 --> 00:00:50,730 ‫However, it's currently really hard to tell which way our projectile is rotated because it's entirely 10 00:00:50,730 --> 00:00:51,540 ‫spherical. 11 00:00:51,540 --> 00:01:00,090 ‫So let's open up the BP projectile class and go to our static measure component and go up right to the 12 00:01:00,090 --> 00:01:03,870 ‫top where it has the transform scale property. 13 00:01:03,870 --> 00:01:08,910 ‫And let's just increase the scale along the X direction. 14 00:01:08,940 --> 00:01:11,310 ‫A value of about two should do the trick. 15 00:01:11,310 --> 00:01:15,540 ‫You can see that it becomes this kind of deformed sphere instead. 16 00:01:15,540 --> 00:01:20,970 ‫And if we go ahead and play and shoot this sphere, you can see that the direction that it's traveling 17 00:01:20,970 --> 00:01:26,310 ‫in is pretty much the, you know, that's that's the direction of the sphere. 18 00:01:26,580 --> 00:01:31,440 ‫And so we can see whether our rotation is having any effect when we spawn it. 19 00:01:31,440 --> 00:01:34,770 ‫So let's go over to the level blueprint. 20 00:01:34,770 --> 00:01:39,840 ‫And the most logical thing to do would be to say, okay, let's go ahead and get the rotation of the 21 00:01:39,840 --> 00:01:40,470 ‫player pawn. 22 00:01:40,470 --> 00:01:48,480 ‫So let's drag off the player pawn reference node that comes out of get play a pawn and let's look for 23 00:01:48,480 --> 00:01:49,590 ‫rotation. 24 00:01:49,920 --> 00:01:57,120 ‫And sure enough we can use get active rotation that seems to match with get active location, it returns 25 00:01:57,120 --> 00:01:57,810 ‫a rotator. 26 00:01:57,810 --> 00:02:05,010 ‫So this seems to fit and we can drag that in to our spawn transform rotation pin of this born actor 27 00:02:05,010 --> 00:02:05,580 ‫node. 28 00:02:05,640 --> 00:02:11,400 ‫But if we go ahead and play this and we shoot off in different directions, you will actually notice 29 00:02:11,400 --> 00:02:14,790 ‫that basically the projectile is not rotating at all. 30 00:02:15,120 --> 00:02:23,880 ‫Now, the reason for this is that if we go in and hit play and then instantly eject, so using F eight 31 00:02:24,630 --> 00:02:30,930 ‫and have a look at our pawn, we can have a look at the pawns rotation in the details pane so we can 32 00:02:30,930 --> 00:02:35,580 ‫click on the pawn, go to the details pane, have a look at the Transform Rotation property and you 33 00:02:35,580 --> 00:02:42,270 ‫can see that it's rotated 180 degrees about the Z axis, but that's the only rotation we've got there. 34 00:02:42,720 --> 00:02:49,230 ‫So what happens if I repossess the pawn, which I can do from the toolbar right at the top there is 35 00:02:49,230 --> 00:02:53,520 ‫a little controller button or I can hit F eight to jump back into the pawn shoes. 36 00:02:53,520 --> 00:02:56,520 ‫What happens if I rotate 180 degrees round? 37 00:02:56,520 --> 00:03:00,150 ‫I would expect my rotation to reflect that. 38 00:03:00,150 --> 00:03:01,710 ‫So I hit F8 again. 39 00:03:01,950 --> 00:03:08,340 ‫I jump out and select the default pawn and I have a look at its details pane, but you can see it's 40 00:03:08,340 --> 00:03:15,630 ‫rotation hasn't updated and that's because by default the this default pawn in unreal isn't configured 41 00:03:15,630 --> 00:03:18,660 ‫to rotate with the camera rotation. 42 00:03:18,660 --> 00:03:20,400 ‫Those are two separate things. 43 00:03:20,400 --> 00:03:23,190 ‫For whatever reason, it doesn't particularly matter. 44 00:03:23,460 --> 00:03:30,510 ‫But what is important is that there is something that does reflect that rotation and that is called 45 00:03:30,510 --> 00:03:32,430 ‫the control rotation. 46 00:03:32,430 --> 00:03:39,460 ‫So you can drag off of the get player pawn node and you can search for control rotation instead. 47 00:03:39,460 --> 00:03:42,780 ‫And you can see there is a get control rotation node. 48 00:03:42,960 --> 00:03:49,140 ‫So I'd like to challenge you to try that node out, try the control rotation, replace the get active 49 00:03:49,140 --> 00:03:54,240 ‫rotation node and plug in to the spawn node and see whether it has any effect. 50 00:03:54,480 --> 00:03:59,220 ‫When you play in the game, do those projectiles point in a different direction? 51 00:03:59,220 --> 00:04:00,720 ‫Pause a video and have it go? 52 00:04:04,070 --> 00:04:04,760 ‫Okay. 53 00:04:04,760 --> 00:04:05,700 ‫Welcome back. 54 00:04:05,720 --> 00:04:13,820 ‫So let's delete our get active rotation, pull off of the get player -- node and search for get control 55 00:04:13,820 --> 00:04:16,520 ‫rotation and bring that node in. 56 00:04:16,520 --> 00:04:18,980 ‫And you can see the output is again a rotator. 57 00:04:18,980 --> 00:04:21,620 ‫Hopefully this time the value will be correct, however. 58 00:04:21,620 --> 00:04:26,180 ‫So let's get that rotator and connect it up to our input for the spawn actor. 59 00:04:26,240 --> 00:04:32,870 ‫We can go ahead and hit play and now if I change the way I'm looking, you can see that these projectiles 60 00:04:32,870 --> 00:04:35,750 ‫are flying off a little bit sideways now. 61 00:04:35,750 --> 00:04:41,720 ‫They're not traveling in the direction of their rotation that we're going to sort out in the upcoming 62 00:04:41,720 --> 00:04:42,350 ‫lectures. 63 00:04:42,350 --> 00:04:44,180 ‫But this is a first step. 64 00:04:44,180 --> 00:04:47,780 ‫We now know what that direction should be. 65 00:04:47,780 --> 00:04:49,400 ‫I'll see you in the next lecture.