public void setCurveTension(float curveTension) {
        spline.setCurveTension(curveTension);
        if (debugNode != null) {
            Node parent = debugNode.getParent();
            debugNode.removeFromParent();
            debugNode.detachAllChildren();
            debugNode = null;
            attachDebugNode(parent);
        }
    }
sets the tension of the curve (only for catmull rom) 0.0 will give a linear curve, 1.0 a round curve

@param curveTension the desired value
jme3-core/src/main/java/com/jme3/cinematic/MotionPath.java