1 00:00:00,000 --> 00:00:03,220 Welcome back, my fellow game developers. 2 00:00:03,224 --> 00:00:05,374 In this video, we not only 3 00:00:05,370 --> 00:00:08,240 have this bar sitting here looking pretty, 4 00:00:08,235 --> 00:00:09,875 when we get hit, 5 00:00:09,870 --> 00:00:12,360 you'll see that our health goes down. 6 00:00:12,360 --> 00:00:14,160 So now when we get hit another time, 7 00:00:14,160 --> 00:00:15,890 There we go, you can see that we die. 8 00:00:15,885 --> 00:00:18,155 Obviously there is this little problem that 9 00:00:18,150 --> 00:00:20,690 we will talk about not addressed right now, 10 00:00:20,685 --> 00:00:23,645 but we will talk about it later on. 11 00:00:23,640 --> 00:00:26,220 So without any further or do a let's not 12 00:00:26,220 --> 00:00:29,670 waste any more time and let's get started. 13 00:00:29,665 --> 00:00:33,965 Okay, so now we have a slider, 14 00:00:33,965 --> 00:00:35,435 we have the text. 15 00:00:35,435 --> 00:00:37,915 All of these represent the health of the player, 16 00:00:37,910 --> 00:00:40,160 but still, when we take damage, 17 00:00:40,160 --> 00:00:41,990 the health doesn't go down. 18 00:00:41,990 --> 00:00:45,230 So what we're going to do is we're going to be changing 19 00:00:45,230 --> 00:00:49,750 this behavior based on using the UI Manager. 20 00:00:49,745 --> 00:00:53,225 So let's go into the UI Manager and let's get 21 00:00:53,225 --> 00:00:55,585 a reference to both the health slider 22 00:00:55,580 --> 00:00:57,280 and the health text. 23 00:00:57,275 --> 00:00:59,495 Now these will be public. 24 00:00:59,495 --> 00:01:01,105 And why are they public? 25 00:01:01,100 --> 00:01:02,600 Well, because we will be 26 00:01:02,600 --> 00:01:04,610 handling them in a different script, 27 00:01:04,610 --> 00:01:06,920 which is the player's health handled. 28 00:01:06,920 --> 00:01:10,370 So I'm going to create a public Slider, 29 00:01:10,370 --> 00:01:13,360 and it's going to be the health Slider. 30 00:01:13,355 --> 00:01:15,475 And remember, we could not have used 31 00:01:15,470 --> 00:01:19,070 this slider if we did not have the Unity engine Ow.ly. 32 00:01:19,070 --> 00:01:21,800 So as you can see, I commented this out and you 33 00:01:21,800 --> 00:01:24,910 can see that the slider now it does not exist. 34 00:01:24,905 --> 00:01:26,615 So that's continue one, 35 00:01:26,615 --> 00:01:29,325 do we have now a reference to the health slider? 36 00:01:29,329 --> 00:01:31,399 Next, we need a reference to 37 00:01:31,400 --> 00:01:35,380 the text of the health vexed. 38 00:01:35,375 --> 00:01:38,225 And these are very basic. 39 00:01:38,225 --> 00:01:40,045 Now we're going to save this and 40 00:01:40,040 --> 00:01:42,160 remember we have an instance, 41 00:01:42,155 --> 00:01:44,485 a static instance in the awake. 42 00:01:44,480 --> 00:01:47,020 So I'm going to go into the player handler, 43 00:01:47,015 --> 00:01:49,595 health handler right here and then start. 44 00:01:49,595 --> 00:01:51,935 As soon as I said, the current health, 45 00:01:51,935 --> 00:01:56,515 I'm going to access the UI Manager dot instance, 46 00:01:56,510 --> 00:02:01,690 dot health slider dot the max value. 47 00:02:01,685 --> 00:02:04,895 And I'm going to set it as the max health. 48 00:02:04,895 --> 00:02:08,275 And then I'm going to do the same with the UI. 49 00:02:08,270 --> 00:02:10,200 Where is it UI Manager, 50 00:02:10,204 --> 00:02:14,814 the instance, health slider, 51 00:02:14,810 --> 00:02:17,480 and the current value, 52 00:02:17,480 --> 00:02:19,130 which is represented by value, 53 00:02:19,130 --> 00:02:21,740 will be the current health. 54 00:02:21,740 --> 00:02:25,550 There we go. So now when I run the game, 55 00:02:25,550 --> 00:02:28,400 if I go into the doom player and I'm going 56 00:02:28,400 --> 00:02:31,520 to set his max health for, 57 00:02:31,520 --> 00:02:33,680 let's say, Oh, okay, 58 00:02:33,680 --> 00:02:35,950 let's just set the current 59 00:02:35,945 --> 00:02:38,765 open because we are already setting here. 60 00:02:38,765 --> 00:02:41,555 I'm just going to comment this out for the reason of 61 00:02:41,555 --> 00:02:46,315 actually having different max value and current values. 62 00:02:46,310 --> 00:02:48,700 So I'm going to set this, let's say at 20. 63 00:02:48,695 --> 00:02:50,255 So when I run the game, 64 00:02:50,255 --> 00:02:52,105 we should see that this Health Bot 65 00:02:52,100 --> 00:02:54,160 will move. And it didn't. 66 00:02:54,155 --> 00:02:56,755 Because obviously, we can see right here 67 00:02:56,750 --> 00:02:59,050 the object reference not set and 68 00:02:59,045 --> 00:03:01,795 I'll know what the problem is if I double-click in here, 69 00:03:01,790 --> 00:03:04,940 we haven't said the health slider on the UI canvas. 70 00:03:04,940 --> 00:03:06,920 So back in the UI canvas, 71 00:03:06,920 --> 00:03:09,140 obviously we need to set this right here. 72 00:03:09,140 --> 00:03:11,990 So health and the slider, 73 00:03:11,990 --> 00:03:14,840 I'm going to drag the slider and the health flexed. 74 00:03:14,840 --> 00:03:17,360 There we go. Nope, not the text. 75 00:03:17,360 --> 00:03:18,860 Oh, okay, So this is 76 00:03:18,860 --> 00:03:21,100 something that we need to talk about. 77 00:03:21,095 --> 00:03:24,205 So the health facts here is not just any text, 78 00:03:24,200 --> 00:03:26,840 it's a text Mesh Pro, 79 00:03:26,840 --> 00:03:29,840 so we cannot be using, where is it? 80 00:03:29,840 --> 00:03:32,680 Where's the UI Manager? There we go. 81 00:03:32,675 --> 00:03:36,575 So I'm going to move it so we cannot just use the text. 82 00:03:36,575 --> 00:03:40,145 We need to have a text Mesh Pro, 83 00:03:40,145 --> 00:03:42,385 but you can see we don't have the text mesh. 84 00:03:42,380 --> 00:03:45,740 Why? Because before we can use the text Mesh Pro, 85 00:03:45,740 --> 00:03:48,350 we need to have the appropriate namespace. 86 00:03:48,350 --> 00:03:50,510 So using, Let's see, 87 00:03:50,510 --> 00:03:54,650 I believe it's the Unity engine dot txt mesh. 88 00:03:54,650 --> 00:03:58,060 So using the TMP, 89 00:03:58,055 --> 00:04:00,755 there we go, hex mesh Pro. 90 00:04:00,755 --> 00:04:03,745 And now in here we can use the text, 91 00:04:03,740 --> 00:04:06,430 text mesh per row. 92 00:04:06,425 --> 00:04:08,335 And there we go. We save that. 93 00:04:08,330 --> 00:04:10,060 Now back in our game. 94 00:04:10,055 --> 00:04:11,455 And unity, I mean, 95 00:04:11,450 --> 00:04:15,080 we can go ahead and drag the health. 96 00:04:15,080 --> 00:04:18,890 I mean, in the UI canvas we can drag the health down. 97 00:04:18,890 --> 00:04:20,580 What is the problem? 98 00:04:20,584 --> 00:04:23,304 I believe that instead of text Mesh Pro, 99 00:04:23,300 --> 00:04:27,670 this also should be text Mesh pro GUI. 100 00:04:27,665 --> 00:04:28,975 Let's try this again. 101 00:04:28,970 --> 00:04:32,250 Save that now back in our game. 102 00:04:32,250 --> 00:04:35,530 And today, now, I will leave that. 103 00:04:35,530 --> 00:04:36,870 Now, there we go. 104 00:04:36,865 --> 00:04:38,695 Finally, we can add, 105 00:04:38,695 --> 00:04:40,125 so we save that. 106 00:04:40,120 --> 00:04:41,860 We run the game and we should 107 00:04:41,860 --> 00:04:43,840 see that the health, yep, There we go. 108 00:04:43,840 --> 00:04:46,270 So we've set the current health to 20, 109 00:04:46,270 --> 00:04:48,150 V-max Health to 100. 110 00:04:48,145 --> 00:04:51,495 So you can see that it's about 1 fifth of the way. 111 00:04:51,490 --> 00:04:53,880 So we know that this is working. 112 00:04:53,875 --> 00:04:57,705 The next step is to have this be updated every 113 00:04:57,700 --> 00:05:02,020 single time we take a hit or we actually start the game. 114 00:05:02,020 --> 00:05:03,580 So I'm going to, 115 00:05:03,580 --> 00:05:06,330 and your challenge is to update the health UI. 116 00:05:06,325 --> 00:05:07,615 So first of all, create 117 00:05:07,615 --> 00:05:09,915 a method that updates the health UI. 118 00:05:09,910 --> 00:05:11,560 So we are talking about the book, 119 00:05:11,560 --> 00:05:14,310 both the slider and the 120 00:05:14,310 --> 00:05:16,130 Next, then you'll need to 121 00:05:16,130 --> 00:05:18,290 use it in the appropriate places. 122 00:05:18,290 --> 00:05:20,240 So you'll need to think of where can I 123 00:05:20,240 --> 00:05:22,880 use the update of the UI? 124 00:05:22,880 --> 00:05:25,090 Make sure you also access 125 00:05:25,085 --> 00:05:27,625 the text and the, and update it. 126 00:05:27,620 --> 00:05:29,540 And finally, I'll give you a hint of 127 00:05:29,540 --> 00:05:32,030 where you can be using this update UI. 128 00:05:32,030 --> 00:05:36,160 You can use it in the start and when the player gets hit. 129 00:05:36,155 --> 00:05:38,005 So with that out of the way, 130 00:05:38,000 --> 00:05:42,380 pause the video right now and go to the Sharon. 131 00:05:42,380 --> 00:05:44,690 Oh, okay, welcome back. 132 00:05:44,690 --> 00:05:48,560 So I'm going to go into the player health handler. 133 00:05:48,560 --> 00:05:50,470 And in here I'm going to create 134 00:05:50,465 --> 00:05:58,295 a private void, update layer health. 135 00:05:59,530 --> 00:06:03,350 And in here what we're going to do is first of all, 136 00:06:03,350 --> 00:06:07,460 we are going to access the UI Manager dot 137 00:06:07,460 --> 00:06:14,000 instance dot Health text, dot text. 138 00:06:14,000 --> 00:06:17,270 And we're going to set it to the current health. 139 00:06:17,270 --> 00:06:19,750 Then we are going to concatenate it. 140 00:06:19,745 --> 00:06:21,485 So I know you haven't done this yet, 141 00:06:21,485 --> 00:06:24,055 but this way we are concatenating. 142 00:06:24,050 --> 00:06:25,940 So first of all, we take the current health, 143 00:06:25,940 --> 00:06:28,130 we add this dash right here or not 144 00:06:28,130 --> 00:06:30,560 that forward slash, it's called, I believe. 145 00:06:30,560 --> 00:06:34,280 And we are going to set the max health and here also. 146 00:06:34,280 --> 00:06:36,160 So we're going to save that. 147 00:06:36,155 --> 00:06:37,795 But not only this, 148 00:06:37,790 --> 00:06:41,280 we are also going to change the value of the slider. 149 00:06:41,284 --> 00:06:43,404 So in here I'm also going to access 150 00:06:43,400 --> 00:06:49,810 the UI Manager dot instance dot health slider dot value. 151 00:06:49,805 --> 00:06:52,985 And it's going to be equal to the current. 152 00:06:52,985 --> 00:06:55,105 Oops, sorry for that. 153 00:06:55,100 --> 00:06:56,510 The current. 154 00:06:56,510 --> 00:06:59,710 So the current health, yeah, that was it. 155 00:06:59,705 --> 00:07:00,965 Save that. 156 00:07:00,965 --> 00:07:03,365 So now the question is, 157 00:07:03,365 --> 00:07:05,795 where do we actually use this? 158 00:07:05,795 --> 00:07:07,385 So there are two places. 159 00:07:07,385 --> 00:07:10,225 First of all, we can use it in the start and 160 00:07:10,220 --> 00:07:12,200 then we kind of 161 00:07:12,200 --> 00:07:13,700 already use it and the start 162 00:07:13,700 --> 00:07:15,160 because we said the current health, 163 00:07:15,155 --> 00:07:17,965 but we are going to remove this line and we are 164 00:07:17,960 --> 00:07:20,830 going to simply call the Update Player health. 165 00:07:20,825 --> 00:07:23,875 And then every time we take damage in here, 166 00:07:23,870 --> 00:07:25,790 after we remove the amount of damage, 167 00:07:25,790 --> 00:07:27,620 we are going to set this, 168 00:07:27,620 --> 00:07:30,760 but I believe it's much better to sell it 169 00:07:30,755 --> 00:07:35,545 after we check the health of 0, maybe not. 170 00:07:35,540 --> 00:07:37,850 The only thing here that I'm 171 00:07:37,850 --> 00:07:39,560 worried about is having the Health 172 00:07:39,560 --> 00:07:42,830 be negative and seeing the bar going the other way. 173 00:07:42,830 --> 00:07:45,850 That's the only thing that bothers me about this. 174 00:07:45,845 --> 00:07:49,525 So I'm going to go ahead and maybe set it in here. 175 00:07:49,520 --> 00:07:53,630 So after we check if we are less than 0, 176 00:07:53,630 --> 00:07:56,240 this may also not look very pretty. 177 00:07:56,240 --> 00:07:58,990 When we die, we still have a bit of health. 178 00:07:58,985 --> 00:08:01,355 Let's see, You know what? 179 00:08:01,355 --> 00:08:02,465 Let's put it in here. 180 00:08:02,465 --> 00:08:03,565 No worries about that. 181 00:08:03,560 --> 00:08:05,000 Later on we will make this 182 00:08:05,000 --> 00:08:07,270 small tweak it changes where we 183 00:08:07,265 --> 00:08:11,695 turn off also the bar whenever we deactivate the player. 184 00:08:11,690 --> 00:08:13,040 So with that done, 185 00:08:13,040 --> 00:08:15,460 save all of that back in our game. 186 00:08:15,455 --> 00:08:17,815 And I'm going to let c in here. 187 00:08:17,810 --> 00:08:19,070 Let's remove this comment, 188 00:08:19,070 --> 00:08:25,100 save that because we actually now have proper health. 189 00:08:25,100 --> 00:08:29,830 I'm going to go into the dome player and let's see. 190 00:08:29,825 --> 00:08:31,285 Let's remove the current health. 191 00:08:31,280 --> 00:08:32,480 This is just to keep track, 192 00:08:32,480 --> 00:08:34,870 we will make sure that it's private later on. 193 00:08:34,865 --> 00:08:36,985 And what did I want to do? 194 00:08:36,980 --> 00:08:39,380 Because the weapon that the enemy is 195 00:08:39,380 --> 00:08:42,160 throwing at us deals and 50 damage, I believe. 196 00:08:42,155 --> 00:08:45,325 So let's make this 300. 197 00:08:45,320 --> 00:08:48,140 So the max health of the player is 300. 198 00:08:48,140 --> 00:08:49,880 I run the game. 199 00:08:49,880 --> 00:08:52,040 And we should see that the max health, 200 00:08:52,040 --> 00:08:54,440 you can see that we have 300 out of 300. 201 00:08:54,440 --> 00:08:56,480 So I'm going to come close to the enemy. 202 00:08:56,480 --> 00:08:57,940 He says, There we go. 203 00:08:57,935 --> 00:09:01,225 You can see that the health is slowly going down. 204 00:09:01,220 --> 00:09:03,640 And finally the last one, we die. 205 00:09:03,635 --> 00:09:06,445 But you'll notice there is a small error that 206 00:09:06,440 --> 00:09:10,130 appeared and it is coming at us a lot. 207 00:09:10,130 --> 00:09:12,120 So I'm going to stop the game. 208 00:09:12,120 --> 00:09:15,940 I'm going to so now we have to consult when those we 209 00:09:15,940 --> 00:09:17,230 don't want that close one of 210 00:09:17,230 --> 00:09:19,480 them and you can see that there is a problem. 211 00:09:19,480 --> 00:09:21,360 And what is the problem? 212 00:09:21,355 --> 00:09:23,725 First of all, we have the enemy bullet controller 213 00:09:23,725 --> 00:09:25,365 can't find the player. 214 00:09:25,360 --> 00:09:28,350 Second of all, we have, I believe. 215 00:09:28,345 --> 00:09:30,715 Okay, So no, not the problem in here. 216 00:09:30,715 --> 00:09:33,615 Well, the problem is actually that we are still trying to 217 00:09:33,610 --> 00:09:36,510 get a reference of the player even though he's dead. 218 00:09:36,505 --> 00:09:39,015 So we're trying to change the health slide. 219 00:09:39,010 --> 00:09:41,920 But anyways, these are small tweaks that we are 220 00:09:41,920 --> 00:09:45,120 obviously going to later on take care of. 221 00:09:45,115 --> 00:09:46,885 But for now I hope you enjoy it. 222 00:09:46,885 --> 00:09:51,195 I hope you now understand and feel how nice our game is. 223 00:09:51,190 --> 00:09:53,140 So everything is done dynamically. 224 00:09:53,140 --> 00:09:55,670 Everything changes automatically using 225 00:09:55,670 --> 00:09:59,000 the code and our game is really taking shape. 226 00:09:59,000 --> 00:10:00,560 So I hope you enjoy it and I'll 227 00:10:00,560 --> 00:10:02,330 see you in the next video. 228 00:10:02,330 --> 00:10:06,060 Don't forget to of course, commit your changes.