public void setVelocity(float[] velocity, boolean isConstant){
        if (!hasPhysicsBody){
            ViroLog.error(TAG, "Attempted to set a velocity on a non-physics node");
            return;
        }

        mNodeJni.getPhysicsBody().setVelocity(new Vector(velocity), isConstant);
    }
Explicitly call setMaterials again with mMaterials. Allows children who override
setMaterials to modify them.
android/viro_bridge/src/main/java/com/viromedia/bridge/component/node/VRTNode.java