1 00:00:05,940 --> 00:00:12,480 Are right in the story or me looking at particle systems what they are and how we could use them. 2 00:00:12,640 --> 00:00:13,980 So let's go over here. 3 00:00:13,990 --> 00:00:21,450 And first we're going to go to our properties tab and go to the particle simulations button right here. 4 00:00:21,880 --> 00:00:28,910 We're going to click on mue and now we're given a list of different options for our particle system. 5 00:00:28,910 --> 00:00:36,730 Now what particle system does is it basically emits from the object that you put it on different particles 6 00:00:36,730 --> 00:00:40,330 to give it random variation to different things. 7 00:00:40,330 --> 00:00:42,940 So we have two kinds of particle systems. 8 00:00:43,030 --> 00:00:46,380 We have an emitter and a hair. 9 00:00:46,630 --> 00:00:51,040 We're going to take a look at the emitter for this tutorial in the hair in the next one. 10 00:00:51,220 --> 00:00:58,840 But the emitter particle system basically allows for you to emit randomly particles from an object. 11 00:00:58,840 --> 00:01:07,990 Now this could be useful for rain because obviously with rain you don't want to model and animate every 12 00:01:07,990 --> 00:01:09,690 single raindrop. 13 00:01:09,880 --> 00:01:11,580 And so it could be used for rain. 14 00:01:11,590 --> 00:01:13,090 It could be used for. 15 00:01:13,420 --> 00:01:18,970 Let's say you have a chain saw cutting something it could be used for the sparks flying out of the metal 16 00:01:18,970 --> 00:01:20,280 hitting the metal. 17 00:01:20,320 --> 00:01:26,980 It could be used for a variety of different things where you need a random distribution of different 18 00:01:26,980 --> 00:01:30,470 particles or different objects in your scene. 19 00:01:30,670 --> 00:01:33,250 So very very cool. 20 00:01:33,250 --> 00:01:41,370 Now if we hit day to play this you could see that the cube emits little particles from the cube. 21 00:01:41,890 --> 00:01:46,800 Now let's take a look at the different options we have here and what they do. 22 00:01:47,140 --> 00:01:52,360 So the number right here is the number of particles emitted from the object. 23 00:01:52,420 --> 00:01:56,310 If I increase this to 10000 Let's say you can see that. 24 00:01:56,320 --> 00:02:00,800 Now we have a lot more particles emitting from our cube. 25 00:02:01,320 --> 00:02:03,650 I can't turn it back down to a thousand. 26 00:02:04,120 --> 00:02:11,530 Right here this is the start frame of our particles and the end frame of the particle system right here 27 00:02:11,530 --> 00:02:13,410 is the lifetime of the particles. 28 00:02:13,420 --> 00:02:19,150 If I hit all day you could see that after a certain point they just die off and disappear. 29 00:02:19,150 --> 00:02:26,580 If we increase the lifetime you will see that they go further and further down and they die off later 30 00:02:26,580 --> 00:02:27,880 down the road. 31 00:02:27,990 --> 00:02:29,520 Poor particles dying off. 32 00:02:29,700 --> 00:02:32,150 It's a sad sad scene. 33 00:02:32,190 --> 00:02:34,240 I mean put this back to 50. 34 00:02:34,680 --> 00:02:39,540 And now this other option that we have right here is the random So this is the randomness of the life 35 00:02:39,540 --> 00:02:40,730 of the particles. 36 00:02:40,920 --> 00:02:48,930 If we increase this it means that some will die right away and some will die further down the road. 37 00:02:50,080 --> 00:02:51,400 Pretty cool. 38 00:02:51,400 --> 00:02:57,280 Now over here we have where we want the particles to emit from whether it's from the vertices of our 39 00:02:57,280 --> 00:03:05,100 mesh from the faces of our mesh or the volume and then we have a couple of different options here for 40 00:03:05,100 --> 00:03:08,950 the randomness and even distribution. 41 00:03:08,950 --> 00:03:15,570 Now going over here we have the cash which is basically we could render this into a keyframe animation 42 00:03:15,570 --> 00:03:23,370 so that it is no longer a particle system but actually keyframe down here and saved into Blendr as a. 43 00:03:23,580 --> 00:03:34,030 As an animation and over here we have the velocity now the velocity tab basically dictates how how much 44 00:03:34,030 --> 00:03:39,270 strength or power or force the particles are emitting with. 45 00:03:39,550 --> 00:03:46,930 So if I increase the normal You could see that it will increase how fast they are emitting from the 46 00:03:46,930 --> 00:03:50,770 normals of our cube or from the faces. 47 00:03:50,790 --> 00:03:57,050 So pretty interesting effect here this could be a fountain or something of that nature. 48 00:03:57,100 --> 00:03:58,600 Pretty cool. 49 00:03:58,600 --> 00:04:04,750 Now for the particles and again these particles from many different things for example if you have a 50 00:04:05,020 --> 00:04:10,900 rushing waterfall you could possible use the particle system for the droplets of waters that are splashing 51 00:04:10,900 --> 00:04:13,600 everywhere and whatnot. 52 00:04:13,600 --> 00:04:17,180 So that's the that's the normal field right here. 53 00:04:18,710 --> 00:04:26,220 Then we have randomness down here which basically affects how randomly they will emit from the cubes 54 00:04:26,230 --> 00:04:29,290 so if I increase this you could see now. 55 00:04:29,360 --> 00:04:34,070 Now they're just shooting out randomly throughout our scene. 56 00:04:34,100 --> 00:04:36,330 Pretty cool. 57 00:04:36,370 --> 00:04:37,880 It's back to zero. 58 00:04:37,940 --> 00:04:45,110 And then over here we have the starting speed of the particles and it's a little bit harder to see here 59 00:04:45,110 --> 00:04:50,870 because if what we're going to do in just two seconds at an object to our particles so that we could 60 00:04:50,870 --> 00:04:58,220 see a little bit better what's happening with these different options and things that we're changing 61 00:04:58,640 --> 00:04:59,240 now right here. 62 00:04:59,240 --> 00:05:06,500 Obviously this will emit the particles in one particular direction or axis. 63 00:05:06,570 --> 00:05:11,160 So right here this kind of looks like a cube throwing up. 64 00:05:11,160 --> 00:05:12,700 Pretty interesting result. 65 00:05:12,870 --> 00:05:19,200 And then the other two axes as well and of course you could go in the negative direction for it to go 66 00:05:19,200 --> 00:05:20,720 in the opposite way. 67 00:05:22,280 --> 00:05:22,610 All right. 68 00:05:22,610 --> 00:05:30,500 Now let's actually add in a a an object to this so we could see more of what the rotation does. 69 00:05:30,500 --> 00:05:37,220 So what are you going to do is hit shift day add mesh and we're going to add in a U.V. Let's go ahead 70 00:05:37,220 --> 00:05:48,160 and add in a go I had an add in a cone actually bring it out and then it's smooth for smooth shading 71 00:05:48,580 --> 00:05:54,610 grabbed the particle system go down here and we're going to change it from path to object. 72 00:05:54,790 --> 00:05:58,520 And now we're going to select our object named cone. 73 00:05:58,540 --> 00:06:00,520 Now you can see it's emitting a pun. 74 00:06:00,680 --> 00:06:05,800 A pun a ton of different little cone shaped and of particles. 75 00:06:05,920 --> 00:06:09,280 And they actually look like Hershey Kisses so. 76 00:06:10,120 --> 00:06:16,240 So if you were doing an animation with a bunch of Hershey Kisses falling from the sky like the movie 77 00:06:16,240 --> 00:06:21,170 cloudy with Cloudy With A Chance Of Meatballs. 78 00:06:21,250 --> 00:06:23,490 Cloudy With A Chance of Hershey Kisses. 79 00:06:23,530 --> 00:06:24,700 Awesome. 80 00:06:24,700 --> 00:06:28,640 All right let's go back here and take a look at the rotation. 81 00:06:29,600 --> 00:06:37,340 So under rotation which is right here if I enable this and zoom in a bit and also I'm going to go down 82 00:06:37,340 --> 00:06:43,900 here and with the emitter back to the object I need to scale up the size so that they're a bit bigger. 83 00:06:45,460 --> 00:06:49,840 And right here the random size dictates the randomness of the size. 84 00:06:49,840 --> 00:06:55,870 So if I increases to 1 Some will be bigger and some will be smaller and it will kind of make the size 85 00:06:55,870 --> 00:06:58,020 of them random. 86 00:06:58,040 --> 00:06:58,370 All right. 87 00:06:58,370 --> 00:06:59,810 Going back to the rotation. 88 00:06:59,870 --> 00:07:01,400 Let's see what this does. 89 00:07:01,400 --> 00:07:10,370 So if I increase the rotation right here the randomness you will see that it will basically rotate them 90 00:07:10,370 --> 00:07:19,470 randomly so another emitting from a random rotation around the origin of this object obviously at zero. 91 00:07:19,570 --> 00:07:24,960 They're completely straight and emitting as this object is right here. 92 00:07:24,970 --> 00:07:29,940 Phase is as rotation around chosen chosen orientation axis. 93 00:07:29,950 --> 00:07:34,870 So if I increases as well it will basically rotate it in a different way. 94 00:07:34,870 --> 00:07:43,840 So right now it's basically emitting from the bottom and on the side of the cube. 95 00:07:44,020 --> 00:07:51,850 Actually mainly just the bottom so right now this will basically dictate which access point or which 96 00:07:51,850 --> 00:07:56,300 rotation the cube will have or actually here are cone will have. 97 00:07:56,300 --> 00:08:01,690 So all the way at negative 1 it will be upside down at zero. 98 00:08:01,690 --> 00:08:07,780 It will be facing up or completely straight and out one it will be upside down as well. 99 00:08:07,780 --> 00:08:16,990 Obviously if you put at Point 7 5 or so like that it will be kind of an angled position. 100 00:08:17,910 --> 00:08:19,940 All right going to set that back to zero. 101 00:08:20,370 --> 00:08:22,820 And that right here this is for the hair. 102 00:08:22,830 --> 00:08:29,310 So I do not believe it will actually affect actually does affect this and it kind of rotates it in a 103 00:08:29,310 --> 00:08:30,570 random direction as well. 104 00:08:30,570 --> 00:08:34,110 And this could be used for hair which is pretty cool. 105 00:08:34,110 --> 00:08:35,390 Now this is the velocity. 106 00:08:35,390 --> 00:08:42,260 So this is again the speed and the rotation at which it gets shot out of the mesh. 107 00:08:44,850 --> 00:08:47,010 Let me go ahead and reset that area. 108 00:08:47,070 --> 00:08:48,370 Here we have dynamic. 109 00:08:48,390 --> 00:08:56,340 So we could choose them to be dynamic so that they collide with other objects in our scene which have 110 00:08:56,340 --> 00:08:59,320 either a collision or a dynamic option to them 111 00:09:02,310 --> 00:09:02,590 now. 112 00:09:02,610 --> 00:09:06,580 Down here we have the physics and this one we're going to take a look at. 113 00:09:06,590 --> 00:09:09,930 And just a second actually let's go ahead and go into it right now. 114 00:09:09,930 --> 00:09:15,850 So right here this is the size of our of our mission. 115 00:09:15,870 --> 00:09:19,220 You can also increase the size by increasing this right here. 116 00:09:19,260 --> 00:09:23,030 So if I increase the scale of this it will change the size as well. 117 00:09:23,040 --> 00:09:28,190 This is the random size once again and this is the same value as down here. 118 00:09:28,200 --> 00:09:33,630 So these two values are exactly the same as over there. 119 00:09:33,710 --> 00:09:36,090 Then we have let me scale down. 120 00:09:36,090 --> 00:09:42,100 Then we have the Brownian factor which basically slow it will slow it down. 121 00:09:45,060 --> 00:09:52,670 Actually know the Brownian is not that that would be the drag and the damp the Brownian apparently is 122 00:09:52,680 --> 00:09:56,170 somehow random erratic particle movement. 123 00:09:56,200 --> 00:10:06,280 So if we increase that as you can see yes some of them are randomly moving and kind of having kind of 124 00:10:06,280 --> 00:10:08,020 a shake to them. 125 00:10:08,030 --> 00:10:13,760 So I basically randomly moves a particle instead of just falling down. 126 00:10:13,770 --> 00:10:15,340 Now the drag. 127 00:10:15,600 --> 00:10:25,660 If you increase this and then increase the damp the drag actually doesn't seem to be doing much as the 128 00:10:25,660 --> 00:10:26,690 amount of air drag. 129 00:10:26,690 --> 00:10:33,600 So that's why the air drag obviously right now we don't have really too much air in our scene. 130 00:10:33,620 --> 00:10:41,840 It might affect a little bit but if you were to put for example a wind a wind force field this drag 131 00:10:41,840 --> 00:10:46,130 right here will basically affect how slow or how fast it will fall. 132 00:10:46,130 --> 00:10:53,600 In comparison with the wind now the damp will basically dampen it and make it so that slower or faster 133 00:10:53,630 --> 00:11:00,500 by kind of dampening the speed and the motion of your particles. 134 00:11:00,500 --> 00:11:01,790 Pretty cool. 135 00:11:01,900 --> 00:11:06,560 Now right here we're going to take a look at some of these more options a little bit. 136 00:11:06,980 --> 00:11:09,320 Very soon like the die on hit. 137 00:11:09,320 --> 00:11:12,800 But for now let's go over here to display. 138 00:11:13,310 --> 00:11:15,200 We're not going to get too much into that for now. 139 00:11:15,260 --> 00:11:18,560 Children you can actually select different children. 140 00:11:18,560 --> 00:11:25,730 So if I select enter pre-lit interpretated it basically adds a child as we saw before you know the parent 141 00:11:25,730 --> 00:11:33,490 child relationship as a child to every cone that is that is emitted. 142 00:11:33,740 --> 00:11:36,040 So right here you can see display is set to one. 143 00:11:36,050 --> 00:11:37,960 But the renderer is set to 100. 144 00:11:38,120 --> 00:11:45,850 So when you render it out it will actually look like that there will be 100 for every one that there 145 00:11:45,860 --> 00:11:46,970 is right there. 146 00:11:46,970 --> 00:11:48,990 Go ahead Control-C to undo that. 147 00:11:49,280 --> 00:11:56,660 And then you could set the size of the child and the randomness of the child as well so it adds more 148 00:11:56,660 --> 00:11:58,480 randomness and variation. 149 00:12:00,270 --> 00:12:08,790 Now let's go ahead and actually go over here since we're done with what is called the rotation part 150 00:12:08,820 --> 00:12:09,640 of this. 151 00:12:09,660 --> 00:12:13,110 Let's actually do a little more interesting scene with this. 152 00:12:13,110 --> 00:12:21,840 Let's see our cone head shift day and Mersch U-V sphere and move it out of the way. 153 00:12:22,200 --> 00:12:22,910 Smooth. 154 00:12:22,920 --> 00:12:25,700 And now what I'm going to do is bring this up G and Z. 155 00:12:25,710 --> 00:12:29,640 By the way you can move this around as it's animating or as it's emitting. 156 00:12:29,640 --> 00:12:31,560 Pretty cool. 157 00:12:31,560 --> 00:12:35,400 I'm going to shift a add mesh cube. 158 00:12:35,800 --> 00:12:41,550 Now I'm going to hit s to scale scale it way up hit G and Z and bring it up. 159 00:12:42,580 --> 00:12:44,550 Scale it down a little bit. 160 00:12:46,480 --> 00:12:54,820 And then hit s shift Z to bring it out tab to go into edit mode control tab face select this face and 161 00:12:54,820 --> 00:13:00,010 delete that face right there now heading X and Z to scale it down like so. 162 00:13:00,010 --> 00:13:02,380 So we have some bounding boxes.