Repairs and modifications

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Repairs and modifications.

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In this video, we'll use make uniform and use repair body.

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In Fusion 360, we want to carry on with our car hood design.

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We've already added edges and we've tried to make sure that all the geometry is smooth,

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but that doesn't necessarily mean that we don't have problems and often times the problems are going to be extremely hard to find,

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especially if you had, let's say, a full car model as opposed to just the front end.

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Well, there are some tools and utilities that we can use to help simplify this process.

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First we can use something called display mode.

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Display mode allows us to change back and forth between box display, control frame or smooth.

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The box display will be the external edges or geometry that are controlling the underlying curvature.

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Now, oftentimes box display will help us identify a potential overlaps or problems.

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Everything might look fine on the smooth display, but the box display will highlight those problems.

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Everything looks pretty good here, but we could make some adjustments to make these areas more uniform.

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I'm going to go back to my smooth display and say, OK.

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And note that we can use shortcut keys on the keyboard to go back and forth using Alt 1, 2 or 3 to get back and forth,

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between box, the control frame or the smooth display

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Under utilities, we also have options to repair body and make uniform.

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Let's take a look at repair body.

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We're going to select the body and we're going to allow it to look for different areas.

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For example, the error labels are error stars, T points, free edges.

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And then we also have some geometry labels.

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When we take a look at these, you'll notice that as we zoom in this, T is a t point.

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The T point means that we have an edge that ends in the middle of another edge.

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That T point is allowed and doesn't necessarily mean there's a problem.

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But often times you will see errors in geometry introduced based on T points.

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We have error stars and these generally happen when we have a drastic change in curvature that happens at an intersection point,

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between more than four edges.

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So you can see here we've got 1, 2, 3, 4 and 5 coming in.

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And in this case we only have 3.

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The ideal geometry is going to be all four sided patches.

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If we can maintain four sided patches on all of our geometry, then we won't see any error stars or T points show up.

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You will note that all of these are yellow and these yellow points are showing up as non issues.

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They're just simply highlighting problems.

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The end guns are showing areas that have in this case three sided patches.

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So you can see we have a three sided here.

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A three sided here and on the other side because we have symmetry.

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Once again, it's really looking for those four sided patches as the ideal geometry.

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If we use auto repair, it will go through the model and it will try to repair any potential issues,

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that you would see with the stars, T points or free edges.

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Because we don't have any of those problems, we can simply hit OK.

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Next under utilities we have make uniform.

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We can select the Tspline body and then we can say OK and allow it to go through,

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and try to adjust the scale of the different areas to try to make it more of a uniform display.

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Now in this case, we have a lot of areas where we have these T points and they're ending at individual sections.

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You also note that in some cases we could likely get rid of these.

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Now while there is not an automatic modification to make that happen, we do have the ability to select edges,

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and once we make those selections, we can hit delete on the keyboard to remove them.

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We will want to make sure that we go across and we can do this by double clicking on one of these edges,

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and it'll carry that tangency and then we can hit delete on the keyboard.

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Using this process to clean up or simplify the model will go a long way in making sure that we don't introduce any of those error T points or stars.

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In some cases like this here, once we remove it, it might drastically alter the geometry but everything so far looks pretty good.

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We might want to double click on this edge, go to modify and add a crease.

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Adding a crease to that edge will affect change in other areas.

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But in most cases this will likely mean that we get a cleaner set of geometry.

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I'm going to use edit form to pull the hood, scoop up a little bit and I'm going to say, OK.

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So using some of those tools allowed us to make some drastic changes to the amount of divisions that we had,

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and to make sure that we didn't have any errors.

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Once we made those changes by removing edges, we can always go back in and take a look at repair body,

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and make sure that we don't have any problems that were introduced based on any geometry changes.

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For this example, everything looks pretty good.

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So I'm going to go back to a home view, make sure that I save the design before moving on.