Let the show begin

We used the following to cause the skater to bend her left leg at the knee and to point her toes out behind her.

• Interactive method calls
• Examination of the axes for the skater's lower leg and foot
• Consideration of yaw, pitch, and roll
• Some other things as well

The code turned out to be fairly simple. 

Listing 4 emulates our earlier interactive method calls.

Listing 4. Animate the skater's leg and foot.

// Animate the skater's leg and foot

iceSkater.leftLeg.lowerLeg .turn( FORWARD , 0.25 revolutions );

iceSkater.leftLeg.lowerLeg.foot .turn( FORWARD , 0.12 revolutions );