Creating Compound Objects

1. Creating Compound Objects James Martin High SchoolComputer Multimedia and AnimationInstructor: G. Patton

2. 1. What is a compound object? A compound object is a complex object created from two or more objects or shapes. • Three types in this chapter: • Loft • Boolean • Terrain

3. 2. What is a loft object? • A loft object is a spline (or 2-D shape) that is extruded, or lofted, along a path.

4. 3. How can you tell if a shape is invalid when creating a loft object? • You cannot select the shape for the operation. • The 3ds max prompt line displays the reason the shape is invalid.

5. 4. When creating a loft object, which spline is selected first? • Either, the shape or the path. • The loft object is generated in the location of the first selected spline.

6. 5. What are the three ways to place the shape or path you “get” for a loft object in the resulting object? The shape or path can be placed as: • a copy • an instance • Or it can be moved.

7. 6. If the Smooth Length check box in the Surface Parameters rollout is checked, what is the effect on the loft object? • Smoothing groups are placed along the path of the loft object.

8. 7. If mapping coordinates are generated for the loft object, why would you check the Normalize check box? Checking the Normalize check box: • Evenly spaces the map tiling along both the length and width of the loft object.

9. 8. How do you display the skin of a loft object in shaded viewports only? To display the skin of a loft: • Check the Skin in Shaded check box (in the Display area of the Skin Parameters rollout).

10. 9. When would you check the Flip Normals check box for a loft object? You would check the Flip Normals check box: • If the loft object appears inside out(all or part of the surface not visible).

11. 10. What are the types of Boolean operations in 3ds max? Boolean operations: • Union, • Subtraction • Intersection • Cut

12. 11. What is the original object in a Boolean operation called? The original object is called: • The operand

13. 12. Which Boolean operation combines overlapping objects and removes the overlapped portion? • Union combines overlapping objects and removes the overlapped portion.

14. 13. What is a subtraction Boolean operation often used to do? • Subtraction creates hollow objects or holes

15. 14. When applying an intersection Boolean operation, from what portions of intersecting objects is the resulting object created? • Overlapping portions create the resulting object.

16. 15. What is the Cut Boolean used to do? • It is used to create a cut object by using a second object to “slice” a portion of the first object

17. 16. If both objects in the Boolean operation have different materials applied, what type of material is the resulting object? • A multi/sub-object material results

18. 17. From what type of object does a terrain object generate a 3D object? • Terrain is generated from splines used as contour lines.

19. 18. What is the Override check box used to do when creating a terrain object? • Override is used to remove internalvertices of a spline shape

20. 19. What are the settings in the Simplification rollout for a terrain object used to do? • Simplification is used to adjust the complexity of the terrain object

21. 20. Which rollout is used to calculate and apply color to a terrain object? • Color by Elevation is used to color a terrain object.