// The following embedded xml is for the editor and describes how the behavior can be edited:
// Supported types are: int, float, string, bool, color, vect3d, scenenode, texture, action
/*
    <behavior jsname="behavior_FootSteps" description="Footsteps">
        <property name="stepLength" type="float" default="40.0" />
        <property name="actionOnStep" type="action" default="" />
        <property name="groundCheckVectorDist" type="float" default="16.0" />
    </behavior>
*/

var behavior_FootSteps = function () {
    this.traveledDistance = 0;
    this.lastPos = null;
};

behavior_FootSteps.prototype.onAnimate = function (node, timeMs) {
    if (!this.lastPos) {
        this.lastPos = ccbGetSceneNodeProperty(node, 'Position');
        this.lastPos.y = 0;
        return false;
    }

    var pos = ccbGetSceneNodeProperty(node, 'Position');

    // check if player is grounded
    var isGrounded = !!ccbGetCollisionPointOfWorldWithLine(
        pos.x, pos.y, pos.z,
        pos.x, pos.y - this.groundCheckVectorDist, pos.z
    );

    // ignore vertical movement
    pos.y = 0;

    this.traveledDistance += pos.substract(this.lastPos).getLength();

    // reset traveled distance if stops
    if (pos.x === this.lastPos.x && pos.z === this.lastPos.z) {
        this.traveledDistance = 0;
    }

    // reset traveled distance if not grounded
    if (!isGrounded) {
        this.traveledDistance = 0;
    }

    if (this.traveledDistance > this.stepLength) {
        this.traveledDistance = - this.stepLength / 2;
        ccbInvokeAction(this.actionOnStep, node);
    }

    this.lastPos = pos;

    return true;
}