Rolling friction demo for sphere and torsional friction demo for two point contact.

examples/RoboticsLearning/R2D2GraspExample.h

@@ -20,6 +20,7 @@ enum RobotLearningExampleOptions
 {
 	eROBOTIC_LEARN_GRASP=1,
 	eROBOTIC_LEARN_COMPLIANT_CONTACT=2,
+    eROBOTIC_LEARN_ROLLING_FRICTION=4,
 };
 
 class CommonExampleInterface*    R2D2GraspExampleCreateFunc(struct CommonExampleOptions& options);