Autodesk 12812-051462-9011 User Guide 3 - Page 2810

all defined in object space. By convention, especially in discussions of texture mapping, object-space coordinates are expressed as UVW coordinates, as opposed to the XYZ coordinates of world space on page 8175. Each object has its own local center and coordinate system as defined by the location and orientation of the object's pivot point. The local center and coordinate system of an object combine to define its object space. When you choose Use Pivot Point Centers from the toolbar or Use Pivot Points from the Modifier List, you are telling the program to use the Object Space origin of one or more selected objects as the center of a transform or modifier effect. When you choose Local from the Reference Coordinate System list on page 967 (on the main toolbar), you tell the program to use a selected object's object space for the orientation of the active coordinate axes. Most modifiers on page 8048 operate in object space. See Object-Space Modifiers on page 1202. Object Space (Biped) When you use freeform animation on page 7988 to animate a biped, you can place a biped limb into the space of another object, or into world space. For example, if the biped's hands are in the space of a ball, then wherever the ball moves the hands move with it. If the biped's feet are in world space, then when you move the center of mass, the feet stay planted in the same location. Obstacle-Avoidance Behavior In crowd animation on page 4761, an important part of crowd behavior is avoidance of obstacles. Think of an obstacle as anything that impedes a crowd member's progress. Examples of obstacles include walls, telephone poles, and fences, as well as other crowd members. Encountering such objects can cause avoidance behavior, which consists of any combination of slowing down, turning, and stopping. Glossary | 8065