In this video, learn about drawing shapes with X-spline and Bezier tools. Also, explore editing mask shapes.
- [Instructor] Let's take a closer look at drawing shapes with the RotoNode. When you draw a shape and close it, you can use it as a mask, and that affects alpha channel. You can also draw shapes and leave them open and use them with other specialized nodes. We'll talk about a few of those special situations later on. For now, we'll concentrate on closed masks. In any case, when you have the RotoNode selected, you'll see the toolbar at the left. We've already tried the square and the circle, but there are other tools you can use to interactively draw your shapes. Let's try one. I'll start with the Bezier right here, click that, and I'll zoom in and draw a test mask. Each time you click in the view, you get a point, or what's also called a vertex. If you click on the very first point, you can close that shape. In fact, your mouse will show a special close symbol. I'll click and close that, and now that effects the alpha channel. You can see the opaqueness in the center of the mask. You can click drag points to reshape. In fact, when you edit the shape, like this, it automatically gives you the Reshape tool right here. Each point has a set of tangent handles. You can click drag those, though initially, both sides are welded together like a Seesaw. If you press Alt or Option on the keyboard and click drag you can move each side independently. You can make the tangent handles long for greater curvature or short for a tight transition. Each point also has a feather line right here. If you click drag this outwards, you get a feather points and the feather edge, and that creates a taper between opaqueness and transparency. You can see that in the alpha channel as gray semi-transparent pixels. Compared to a point with no feather, you can see that point has a very quick transition, usually one pixel between opaqueness and transparency. If you move the tangents for the original points, it moves the feather tangents. However, you can move the feather tangents independently and you can still move both the original points and the feather points on its own. You can delete a point if you want to. Select it and press the Delete key. You can insert a new point if you press Alt or Option and let your mouse hover over a span. You get the plus sign, then you can click. There are different tangent types for each point and that affects the transition through that point. You can select the points, right mouse button click on top of it, and get this menu, and here in the center are the different types. There's linear, that keeps your tangent handles, but gives you a hard corner, corner, which gives you the same corner with no tangent handles so you cannot make it smooth, cardinal, which maximizes the smoothness with the tangent handles, and center where it flattens out the spans. Even if you change the tangent type for the points, you can still move the points, still pull out the feather, and if you do see tangent handles, continue to manipulate those. Let's try a new tool and see how it compares. This time, the X-spline right here. I'll click that and add some points, then close the shape. You can see what this style of tool the points do not touch the span or the curve, and the shape is much smoother. You can still move the points, drag out the feather, and then change the tangent type. However, you'll never see tangent handles. I'll right click on this point, and then say go to Cardinal and it alters the shape. There's no tangent to handle it all. So a different way to draw a shape. Experiment with both and see which one you like the best. We're now ready to try a few other tools and methods for manipulating these shapes.
- Setting up a Silhouette project
- Working with nodes, objects, layers, and mattes
- Keying a green screen
- Point tracking
- Applying tracking data
- Tracking masks
- Animating transforms
- Warping images and time
- Color grading and color matching