các bức tranh thư viện quá. Trong chương 3 và 5, bạn sẽ nhìn vào nơi để tìm thấy hình ảnh tuyệt vời để sử dụng trong các cảnh từ Internet, và làm thế nào để làm cho việc sử dụng tốt nhất của họ để thiết lập cảnh của vào File | Import, và đánh dấu vào sử dụng Khi hộp hình ảnh. Điều hướng đến một hình ảnh, nhấp chuột vào nó và nhấn Open. | Modeling for Visualization As well as face-me components static 2D billboards can be created. You ve already learned this skill in Chapter 3. Can I reduce the number of segments in an arc or circle If you keep the above two things in mind learning to model low poly curves and circles is all the extra knowledge you need. We ll look at this now to see how easy it is to produce low poly curved models. Time for action - low poly curves and circles All circles and curves in SketchUp are made up of straight lines. The default number of straight lines in a circle is 24. 1. Draw a circle and zoom in to the edge. You can see a facetted edge as shown in the preceding screenshot. This is because SketchUp draws circles and arcs as a series of lines to create the curvature. 2. Now Push Pull the circle to create a cylinder. 3. To find out how many polygons are being used to make up the cylinder go to Model Info Statistics. 4. The number of faces will be 26. Now delete this cylinder and draw another circle. Select the edge only. 5. Right-click and select Entity Info. 6. Change the number of segments to 8. 104 Chapter 4 7. You will be able to see how many segments straight lines make up the circle. Extrude the cylinder and check polygons again. Faces now number just 10. Notice SketchUp still smoothes the curved surface even though it s hardly a curve any more. What just happened This method can be used for all circles and arcs to reduce the amount of segments wherever this will not impact on the final rendering. This means most objects and especially any small or distant objects. Making circles easy to snap to later Keep the number of segments to a multiple of four. This allows you to inference snap to the quadrants of the circle or cylinder later which can be very useful. In a rendering program all the SketchUp faces are converted to multiple triangles. So there will be twice as many polygons as there are square faces in SketchUp. The following picture shows three cylinders and .
