WEBVTT

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Welcome back. In this video, we're going to go ahead and create two very simple

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surfaces and then talk about surface-to-service interaction when you're

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doing pasting of surfaces into a new combination surface. So I'm going to go

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ahead and navigate over to the right hand side of my surface over here and I'm

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going to draw in a rectangle. From this rectangle, I'm going to go ahead and

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offset that initial rectangle inwards 50 feet. I'm going to do another

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offset of the inner rectangle by another 50 feet and then I'm going to offset

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that third rectangle inwards by 10 feet. So from here, I'm going to go ahead and

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define these rectangles as at specific elevations. I'm going to go ahead and

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right-click. I'm going to choose properties. I'm going to navigate this window

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over here. I'm going to choose elevation. I'm going to set my outer rectangle at

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100. I'm going to select my second rectangle. I'm going to set it at an

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elevation of 75. I'm going to select my third rectangle. I'm going to set it as an

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elevation of 75 as well and then I'm going to select my inner rectangle and I'm

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going to set it as an elevation of 85. So from here, I'm going to go ahead and

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close my properties window. I'm going to navigate over to surfaces in my

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prospector tab in my tool space. I'm going to go ahead and select it, right-click

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and click create surface. I'm going to create two surfaces. So I'm going to create

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the first one. I'm going to create my large surface and I'm going to go ahead

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and set my style as 2 and 10 background and I'm going to click OK. Then I'm

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going to go ahead and go to large, open my definitions, go to contours, right-click,

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select add. I'm not going to put a description in. I'm going to leave the

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weeding factors as is and the supplementing factors as is. I'm also going to

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leave the minimize flat areas information in here as is. So I'm going to go

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ahead and click OK. I'm going to do a window crossing across the outer two

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rectangles and hit enter and then I'm going to go ahead and go back into

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surfaces in my tool space prospector tab, right-click, create surface. I'm

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going to type in a new name and type small. I'm going to accept contours 2 and

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10 background as my style and I'm going to click OK. Now I'm going to minimize my

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large, expand my small, expand definitions, go to contours, right-click, select add,

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leave all of the information as it shows up in this window and click OK and do a

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window crossing across the inside two rectangles and hit enter. So now what I

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have is I have two surfaces, one small and one large and if I go ahead and I

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select both of these by picking a contour on the inside or on the outside and on

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the inside and selecting object viewer, what we will see here is that we have a

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downward basin and then an upward hill inside of that basin. So we're going to

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work with these two surfaces. What you'll notice right now is that if I go and

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I look at the bottom side of this, you can see I have a flat plane across the

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bottom of my basin and that I can see the rectangle for that hill that's

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inside of it. So what we're going to do next is we're going to go ahead and

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create one more surface. We're going to right-click create surface and we're

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going to go ahead and call this combo. I'm going to go ahead and click OK. I'm

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going to minimize my full development, maximize my combo, maximize definitions

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for my combo surface and I'm going to go to edits, I'm going to right-click on my

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edits and I'm going to go ahead and go to paste surface. I'm going to select paste

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surface, I'm going to go ahead and I'm going to select large, click OK. What I'm

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going to do next is I'm going to right-click on edits, I'm going to paste surface

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again and this time I'm going to select small and click OK. So from here what I'm

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going to go ahead and do is I'm going to turn my large and small surfaces

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off, I'm going to right click, select surface properties, go to information

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tab, drop down, set it to no display, click apply, click OK, I'm going to go to

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small, right click, surface properties, drop down surface style, select no display,

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click apply, click OK. So from here now, the only surface being displayed is my

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combo surface. I can check that by selecting a contour and up in the contextual

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room, you'll see it says 10 surface combo. This is my combo surface that I've

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selected. If I go to object viewer, what you'll notice is that if I rotate this into

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three-dimensional view, it looks identical except that when I come underneath,

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you'll notice that my inner surface now does not have that flat plane and

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that's because of order of operations. So if I go and I close this window, I go

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to my combo surface, I right click and select surface properties and navigate to

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definition. What you'll see here is that the order of operations for this

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surface is to add in my surface large and then to add in my surface small. Now,

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what's happening here is that my surface small does not have a plane going from

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one side of the outer edge across to the other side of the outer edge and

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creating a flat bottom underneath. That's why we can see the underside of our

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small surface being copied into our larger surface. Now, if I go ahead and I

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change the operation order by selecting paste, add small surface and

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promoting it upwards to the top, you're going to notice I get an error here that

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says that these need to be redrawn. I can click apply, rebuild surface, and then

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click OK. When I do that, you're going to notice that the contours on the inside

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disappear and that's because if you go to object viewer, you will notice that my

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inner hill is not there anymore. And the reason that my inner hill is not there

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anymore is that the order of operation was to add in my inner hill surface and

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then to add my outer surface or my large surface. So I have my small surface

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added and then my large surface added. Well, my large surface has this large flat

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plane on the inside of my basin. And so the data from that large flat plane

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overwrote all of the data for my hill on the inside of my saw surface. So that

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is an example of why your order of operations inside of your definitions tab

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matters is because I have lost all of this data. I had to put in my large

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surface first and then my small surface in order for both to show up. So if for

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some reason you ever did a paste surface edit, what you're going to go ahead and

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make sure you do is you're going to make sure that your small information or

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your small data needs to come after your larger information or your larger

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data. So I'm going to go ahead and hit apply, rebuild, select OK. And if I look

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at this object in object viewer again, what you're going to see now is that I

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now have that hill in the middle. My small surface is now showing up because

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civil treaty is building the large surface first and then building the small

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surface after that.

