nicolasgramlich/AndEnginePhysicsBox2DExtension — Issue #2: missing box2d reference. 
Author: SpiRaiL
Created: 2012-02-16 22:25:32+00:00
State: open

Box2D/ContactImpulse.c \
Box2D/ContactImpulse.h \

are missing from
/jni/Android.mk

.so files need to be recompiled.

reference: http://www.andengine.org/forums/gles2/collision-strength-t6876.html