Once you??™ve set the
Collision by option to Sphere, click
the Calculate button.
Figure 14.7 Reduce the ball object??™s
Bounce/Bind Power setting to 40% from
the default 200% to stop it careening out
of the scene.
Figure 14.8 Adding weight to the ball
and changing the Impact Effect to Roll will
change how the ball behaves.
18. Once the calculation is finished, click the play button at the bottom of the interface
and you??™ll see the ball roll smoothly down the solid objects (Figure 14.9).
Figure 14.9 Adjusting the Collision by option lets your ball roll down the obstacles.
19. Click the Rotation tab, and to the left of the Impact Effect setting, you can tell the
ball to roll on a specific axis only. Click the Axis drop-down list and you can see
it??™s set to Free, but you can change this to the Y-axis (which might apply to a spinning
top), or X-axis (for a wheel or yo-yo), and other variations. The Free setting
is best for a rolling ball, so you don??™t need to change anything here, but it??™s a good
idea to familiarize yourself with this important control.
20. You can also change some of the other values, such as Wind Effect and Torque.
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