1 00:00:06,020 --> 00:00:10,230 All right now let's go ahead and take a look at rigid body physics. 2 00:00:10,230 --> 00:00:12,100 So what a rigid body physics. 3 00:00:12,180 --> 00:00:20,370 Well it basically allows for us to simulate animations of things that would normally be harder to animate 4 00:00:20,370 --> 00:00:29,940 by hand such as boxes falling rocks being thrown to the floor you know things falling and tumbling around 5 00:00:29,940 --> 00:00:37,080 and having a random kind of rotation such as if you were to throw you know if you had a bunch of pencils 6 00:00:37,080 --> 00:00:40,480 in your hand and you threw them on the floor or on the table. 7 00:00:40,590 --> 00:00:49,110 They would have a random animation to it so rigid body physics allows for us to simulate objects that 8 00:00:49,140 --> 00:00:57,570 are that can interact with one another and Blendr actually does the animation for those things as they're 9 00:00:57,630 --> 00:00:59,650 interacting with one another. 10 00:00:59,850 --> 00:01:00,570 It's really cool. 11 00:01:00,570 --> 00:01:08,660 So if you can imagine a brick wall being broken down by a wrecking ball or something of that nature 12 00:01:09,140 --> 00:01:15,170 and you wouldn't want to animate all the bricks one by one of them falling and breaking and being thrown 13 00:01:15,170 --> 00:01:21,620 out of place a rigid body physics allows for us to do that and we're going to be doing just that exact 14 00:01:21,800 --> 00:01:27,470 thing that I mentioned right there so let's go ahead and take a look at this and blunder. 15 00:01:27,520 --> 00:01:35,280 Let's first bring our default cube up along the Z-axis by hitting g z and then one to bring it up one 16 00:01:35,290 --> 00:01:37,060 Blendr unit. 17 00:01:37,160 --> 00:01:41,750 Let's go over here to our properties tab and let's go to the physics tab. 18 00:01:41,960 --> 00:01:47,640 Now here we have all kinds of different physics from cloth to smoke to fluid etc.. 19 00:01:47,740 --> 00:01:52,010 But we're going to be taking a look at rigid body physics. 20 00:01:52,010 --> 00:01:58,410 So first before we do that let's go ahead and hit shift day and mash and let's add in a plane. 21 00:01:58,940 --> 00:02:05,120 Let's scale it up with the esky and bring this a little more above the ground. 22 00:02:05,240 --> 00:02:13,340 Now with the cubes like that if I click on rigid body and now gives me a new tab and tells me that now 23 00:02:13,340 --> 00:02:19,630 my cube is the rigid body Physick and you could see that via the green outline right here. 24 00:02:20,000 --> 00:02:27,410 If I hit Alt A to play the animation you can now see that our cube falls and it goes through the floor. 25 00:02:27,740 --> 00:02:33,890 So for it to interact with the floor you could see that if I go back to the beginning of the animation 26 00:02:34,580 --> 00:02:38,390 right here the cube is an active rigid body Physick. 27 00:02:38,390 --> 00:02:40,390 So let's take a look at some of the options here. 28 00:02:40,400 --> 00:02:42,350 Right here it's active. 29 00:02:42,350 --> 00:02:47,500 If I go to my plane or my floor and enable rigid body physics on here. 30 00:02:47,780 --> 00:02:52,520 Now if we have an active and hit all day they both will fall. 31 00:02:52,880 --> 00:03:02,680 But if I change the the floor or the plane to passive you can see that now the cube interacts with the 32 00:03:02,710 --> 00:03:03,460 plane. 33 00:03:03,520 --> 00:03:04,570 Pretty cool. 34 00:03:04,630 --> 00:03:09,100 And let's go ahead and rotate this a random way so our twice and G. 35 00:03:09,100 --> 00:03:09,590 And Z. 36 00:03:09,610 --> 00:03:10,620 To bring it up. 37 00:03:12,020 --> 00:03:14,120 Now you can see what's happening. 38 00:03:14,120 --> 00:03:20,450 So imagine having to animate that right there as it bounces and kind of tumbles around. 39 00:03:20,450 --> 00:03:24,180 That would be a pain in the butt. 40 00:03:24,440 --> 00:03:32,350 So rigid body physics allows for you to have really cool natural animation and simulations such as this. 41 00:03:32,750 --> 00:03:35,410 All right let's take a look at some of the other options we have. 42 00:03:36,360 --> 00:03:42,480 If we go over here we could see that dynamic basically makes it so that it is active and it's going 43 00:03:42,480 --> 00:03:47,520 to be moving around if we uncheck this and hit all day it's not going to do anything. 44 00:03:47,520 --> 00:03:52,470 It's still a rigid body but it will not move or have any animation to it. 45 00:03:53,510 --> 00:03:56,170 Right here is the mass of the object. 46 00:03:56,210 --> 00:04:02,330 So obviously the more mass the heavier it will be and the bigger of an impact it will have. 47 00:04:03,080 --> 00:04:05,300 Also if you put the mass way high 48 00:04:08,140 --> 00:04:14,980 let's exaggerate it to that number could see if I hit all day as a little bit less of a bounce so the 49 00:04:14,980 --> 00:04:19,990 higher you put the mass the heavier the object will be. 50 00:04:19,990 --> 00:04:26,680 Now we also have some options over here if we click on the physics tab that's on the left here on our 51 00:04:26,680 --> 00:04:27,560 toolbar. 52 00:04:27,670 --> 00:04:35,360 By hitting the tiki you can see that right here we have a calculate mass option right here. 53 00:04:35,560 --> 00:04:40,750 If we check click this we could have the mass of all kinds of different things. 54 00:04:40,750 --> 00:04:42,070 How cool is that. 55 00:04:42,310 --> 00:04:49,000 So we can have the mass of brass bronze copper cork lead etc.. 56 00:04:49,270 --> 00:04:55,300 So if we select one of these such as iron you can see that the mass is changed over here and if we had 57 00:04:55,490 --> 00:05:00,370 a to play you can see that it has a different sort of mass to it. 58 00:05:00,370 --> 00:05:07,500 Now of course you could either change it yourself or go over here and calculate the mass of your object. 59 00:05:07,510 --> 00:05:08,030 All right. 60 00:05:08,080 --> 00:05:10,820 The next option down here is the shape. 61 00:05:10,930 --> 00:05:13,730 This is the convex hole it's selected at. 62 00:05:13,960 --> 00:05:23,740 And this is basically the when your object is animated it actually has an invisible bounding box around 63 00:05:23,740 --> 00:05:33,790 it and convex hall kind of basically adds a geometry around your object that is pretty much almost the 64 00:05:33,790 --> 00:05:41,650 same shape as your object and make a contours around there so that it knows where to balance and how 65 00:05:41,650 --> 00:05:42,430 to balance. 66 00:05:42,430 --> 00:05:45,970 So this is a different options we have for that. 67 00:05:45,970 --> 00:05:53,110 The other one that's very good also is mesh because this one actually has the same form as your actual 68 00:05:53,110 --> 00:05:53,960 mesh. 69 00:05:53,980 --> 00:06:01,240 It takes longer to render because if you have a more complex shape it will have the same exact kind 70 00:06:01,240 --> 00:06:03,610 of shape for the interaction. 71 00:06:03,610 --> 00:06:06,120 But it will give you better results. 72 00:06:07,600 --> 00:06:17,340 Now over here we have the friction and this if we increase this here all day you can see that it has 73 00:06:17,340 --> 00:06:21,000 a little bit more friction as it goes on the surface. 74 00:06:21,000 --> 00:06:29,370 And of course the bounciness factor down here if we increase this it all day let me actually change 75 00:06:29,370 --> 00:06:30,590 the mass of this. 76 00:06:30,690 --> 00:06:33,780 Let me put the mass of this too. 77 00:06:35,220 --> 00:06:38,170 I'm going to put it to rubber. 78 00:06:38,240 --> 00:06:41,410 If we have that all right rubber right there. 79 00:06:41,600 --> 00:06:46,340 Now if we hit all day again you can see that not much happens with the bounciness But if we go to our 80 00:06:46,340 --> 00:06:55,660 plane and our plane our plane floor right here and we increase the bounciness here as well you will 81 00:06:55,660 --> 00:06:59,390 see that now if I hit all day it will have some bounce to it. 82 00:06:59,650 --> 00:07:01,510 So how cool is that. 83 00:07:01,900 --> 00:07:03,520 Pretty interesting bounce right there. 84 00:07:03,520 --> 00:07:07,730 It's a little bit too much I'm going to go back to the cube. 85 00:07:07,930 --> 00:07:13,720 Put it down and we could hit Allt a and we get that effect. 86 00:07:13,760 --> 00:07:14,810 So that's pretty cool. 87 00:07:14,810 --> 00:07:17,810 Let's go ahead and actually try that with a ball. 88 00:07:17,870 --> 00:07:25,290 So if I hit shift they add mash U-V sphere scale it up a bit. 89 00:07:25,740 --> 00:07:34,170 And now instead of trying to copy the same rigid body physics options I have on the cube right here 90 00:07:34,170 --> 00:07:40,830 and having to add them all over again just select the sphere and then the cube by shift right clicking 91 00:07:41,460 --> 00:07:49,440 and then select copy from active and it will copy the rigid body options from here to here. 92 00:07:49,440 --> 00:07:55,740 Now let's go ahead and hit Alt-A to play and you could see that our ball is not bouncing too much so 93 00:07:55,740 --> 00:08:06,790 grabbing the ball let's increase the bounciness of it go back and hit all day and let's actually increase 94 00:08:06,790 --> 00:08:14,440 it on the plane as well which already is now a factor that might be playing here is that the ball because 95 00:08:14,440 --> 00:08:19,810 I scaled it up now it has a different scaling to it which affects the mass. 96 00:08:19,900 --> 00:08:23,320 So hitting T on the q r and on the keyboard. 97 00:08:23,410 --> 00:08:27,920 If we go over here you can see that the scale is 1.6 three. 98 00:08:27,940 --> 00:08:32,320 So let's go ahead and reset the scale to one by applying the scale. 99 00:08:32,320 --> 00:08:39,820 So if we had control a we could apply the scale and you will see that the scale will go back to 1 while 100 00:08:39,820 --> 00:08:43,670 still being at this size right here. 101 00:08:43,730 --> 00:08:48,200 Now let's go ahead and here all day again and see what happens this time. 102 00:08:48,290 --> 00:08:53,380 You can see that now it's bouncing a little bit more and it's going a little bit all over the place. 103 00:08:54,690 --> 00:09:06,330 If I hit go over here back to this tab I want to smooth it out go back to my physics and now let me 104 00:09:06,450 --> 00:09:09,000 move the cube a little bit more. 105 00:09:09,000 --> 00:09:10,860 Put this higher. 106 00:09:11,010 --> 00:09:12,560 Let's see how it looks. 107 00:09:14,050 --> 00:09:20,230 So you can see that now it's bouncing quite high and actually way too much. 108 00:09:20,230 --> 00:09:23,060 So putting down the bounciness factor of this. 109 00:09:23,320 --> 00:09:27,430 You could see that you could play around with this and get some pretty cool effect. 110 00:09:27,430 --> 00:09:30,440 So there's a pretty good ball bounce right there. 111 00:09:30,610 --> 00:09:38,590 And that is awesome so rigid body physics allows for us to create this kind of cool animations like 112 00:09:38,890 --> 00:09:44,480 that so those are the different options over here with rigid body physics. 113 00:09:44,480 --> 00:09:50,780 Let's take a look at the collision groups now the collision groups is basically just like the layers 114 00:09:50,780 --> 00:09:51,590 tab. 115 00:09:51,620 --> 00:09:56,330 This is the collision group that your objects are in. 116 00:09:56,500 --> 00:10:05,840 Also if you have more than one object that is a rigid body object they will actually interact with one 117 00:10:05,840 --> 00:10:06,380 another. 118 00:10:06,380 --> 00:10:11,610 If I put this here you can see that they interact with one another. 119 00:10:11,650 --> 00:10:19,850 If I put this on a different collision group such as two and these ones are still out one you will see 120 00:10:19,850 --> 00:10:20,810 what happens. 121 00:10:21,640 --> 00:10:26,670 And it doesn't collide with the other ones are that are on collision group one. 122 00:10:26,920 --> 00:10:30,150 So we want to make sure that everything we want to interact with one another. 123 00:10:30,160 --> 00:10:33,490 They have to be in the same collision group. 124 00:10:33,640 --> 00:10:34,030 All right. 125 00:10:34,030 --> 00:10:35,350 That's pretty awesome. 126 00:10:35,350 --> 00:10:45,950 Now let's take a look at damping right here and the damping is basically the it kind of slows down the 127 00:10:45,950 --> 00:10:46,630 effect of it. 128 00:10:46,630 --> 00:10:53,960 So you'll see with the ball if I select this hit Alt-A you can see it has that particular animation 129 00:10:53,960 --> 00:10:54,610 to it. 130 00:10:54,680 --> 00:11:01,880 If I increase the damping or the translation right here you can see that it slows it down and dampens 131 00:11:01,970 --> 00:11:08,150 the rigid body physics simulation of the ball. 132 00:11:08,180 --> 00:11:14,210 Also if I bring it way down so it's not as exaggerated you will see that when it bounces it's not going 133 00:11:14,210 --> 00:11:15,380 to bounce as much. 134 00:11:15,390 --> 00:11:19,470 And it's kind of dampened as the name implies. 135 00:11:19,620 --> 00:11:21,990 Also we can increase the rotation of it. 136 00:11:22,070 --> 00:11:27,690 Now on the ball you can't really see it because it's when it's rotated it's a sphere. 137 00:11:27,800 --> 00:11:29,720 But those two options are pretty cool. 138 00:11:29,720 --> 00:11:39,140 If you want to dampen the the effect of the rigid body and have it more slow motion and not as real 139 00:11:39,140 --> 00:11:41,410 world. 140 00:11:41,520 --> 00:11:41,870 All right. 141 00:11:41,880 --> 00:11:48,000 So that's basically the main settings that you will be using in this tab over here. 142 00:11:48,270 --> 00:11:53,040 And it's a really cool it's a really cool option. 143 00:11:53,040 --> 00:11:54,540 Rigid body physics. 144 00:11:54,600 --> 00:12:01,140 Another thing to keep in mind with these options is if we go to the seam tab we can increase the speed 145 00:12:01,590 --> 00:12:11,400 of our rigid body physics so Also keep in mind that when I hit Control to reset the scaling of this 146 00:12:11,820 --> 00:12:19,410 it was for a reason because the size of this affects the rigid body movement of this. 147 00:12:19,440 --> 00:12:21,160 Now right now these are in Blendr units. 148 00:12:21,180 --> 00:12:30,590 But if I go to my seam tab which I'm already on and slide metric you can see that now we are in meters 149 00:12:30,650 --> 00:12:38,240 and if I go over here to my rigid body physics we can actually see the weight of this in tons. 150 00:12:38,240 --> 00:12:44,270 So this ball right now is twelve point one seven six tons. 151 00:12:44,270 --> 00:12:52,250 So that would probably not be realistic but this allows for you to be able to get a more real world 152 00:12:53,600 --> 00:12:56,780 value for your rigid body physics. 153 00:12:56,870 --> 00:13:01,940 And again when you scale it up it affects the scale of your object. 154 00:13:01,950 --> 00:13:07,430 So now this ball would be three meters big. 155 00:13:07,550 --> 00:13:14,060 Meaning if you hit Alt-A to play it though the rigid body physics will interact differently because 156 00:13:14,060 --> 00:13:20,360 it's a much heavier and larger scaled mesh than it was before. 157 00:13:20,360 --> 00:13:21,430 So keep that in mind. 158 00:13:21,440 --> 00:13:28,340 And of course if you want to at this size but you know you want to have this size but you want all these 159 00:13:28,340 --> 00:13:35,260 values to be one and so that in Blender it's still the size of it is still one. 160 00:13:35,260 --> 00:13:42,890 You could hit control a and apply the scale and it will actually reset the scale of it to one while 161 00:13:42,890 --> 00:13:50,090 still having this size right here which will give you a different result because again the scale the 162 00:13:50,270 --> 00:13:51,590 size of this. 163 00:13:51,860 --> 00:13:53,360 We have our mesh around it. 164 00:13:53,390 --> 00:14:01,910 But all of the rigid body physics is controlled and manipulated and effected from the center origin 165 00:14:01,910 --> 00:14:03,740 point right here. 166 00:14:03,740 --> 00:14:09,620 So just keep those two in mind that you can actually change it into metric so you get more precise real 167 00:14:09,620 --> 00:14:16,010 world you know mass to your object and scaling to your object. 168 00:14:16,010 --> 00:14:24,520 And also that your scale affects how your rigid body will interact with your scene. 169 00:14:24,830 --> 00:14:27,500 All right so that's the options of rigid bodies physics. 170 00:14:27,500 --> 00:14:29,370 We also have some over here. 171 00:14:29,540 --> 00:14:33,880 Let's take a look at these right here in a little bit future. 172 00:14:33,910 --> 00:14:34,370 Tauriel. 173 00:14:34,370 --> 00:14:43,120 So for now let's go ahead and go on to the next part of this video. 174 00:14:43,140 --> 00:14:43,500 All right. 175 00:14:43,500 --> 00:14:45,210 Check out these rocks. 176 00:14:45,330 --> 00:14:46,760 Ok. 177 00:14:47,610 --> 00:14:49,890 More clarity more reality. 178 00:14:49,980 --> 00:14:54,890 Sometimes we see the world through distortions and blow things way out of proportion. 179 00:14:55,020 --> 00:15:00,180 We attach meaning to things that don't make sense and live by those at our lifes expense. 180 00:15:00,180 --> 00:15:02,980 Take a look at the meanings you've given things and change them. 181 00:15:03,000 --> 00:15:05,030 If they don't make your heart wrong. 182 00:15:05,210 --> 00:15:09,660 All right ladies and gentlemen take a look at the beliefs you formed around certain things. 183 00:15:09,850 --> 00:15:12,430 If they don't feel good change up. 184 00:15:12,660 --> 00:15:13,340 All right cool. 185 00:15:13,350 --> 00:15:15,420 See you in the next video. 186 00:15:15,420 --> 00:15:16,760 Appreciate you guys. 187 00:15:16,800 --> 00:15:18,840 All of you are messy buko. 188 00:15:18,960 --> 00:15:22,360 There's another word for you in French Matthysse buku chup.