Nhấp và kéo spinner Phân đoạn xuống để giá trị phân đoạn đọc 4, mức thấp nhất giá trị có thể cho một hình cầu. Hình cho thấy quả cầu trở thành một hình dạng kim tự tháp với các cạnh phẳng. | introducing the other spline types 169 Table Creation Methods for Splines CONTINUED Spline Name AND FUNCTION Creation method Creation Options PARAMETERS Ellipse Draws ellipses Click first tangent edge and drag for other edge Edge . Or click center and drag for edge Center . Edge Center Length Width. Donut Draws a donut shape two concentric circles Click first point on circumference and drag for second point on circumference click for second radius Edge . Or click center and drag for first radius click for second radius Center . Edge Center Radius 1 Radius 2. Star Draws star shape Click center and drag for first radius click again for second radius. Radius 1 Radius 2 number of Points of star Distortion twist Fillet Radius 1 Fillet Radius 2. Helix Draws a 3D helix spiral Click first circumference point drag second circumference point click height click second radius Edge . Or click center drag first radius click height and click second radius Center . Edge Center Radius 1 Radius 2 Height Turns Bias CW clockwise CCW counterclockwise . Items separated by a slash denote radio button options. Italics denote button group names. You may want to experiment by creating some different splines in a separate file. Remember that you can extrude most of them into the third dimension by using the Extrude or Bevel modifiers and the Loft compound object which extrudes a shape along a spline path you ll learn about lofting in Chapter 7 Organizing and Editing Objects . Common parameters among all of the shape primitives are found in the Rendering and Interpolation rollouts. In the Rendering rollout you can force 3ds Max to render a two-dimensional spline as if it were a three-dimensional object complete with surfaces. The Interpolation rollout contains controls for adjusting the number of steps or straight segments between each vertex. The more steps a shape has the smoother the curves are but this results in a more complex object when the shape is lofted or extruded. In addition
