Why does the duck not recatch the starting or nearest node after it's followed the path one time? I simply want to make it endlessly follow the path but I must be doing something wrong!


Code:

---

var temp_pan[3];

var pan_ang_smooth = 0.5;
var tilt_ang_smooth = 0.5;

var distance; // distance from entity to node
var node = 1;   // node that we want to goto.. also shows what node we started with
var pos_node[3];   // array to hold node position
var switch = 0;   // to set move on or off

entity* duck;

function move_duck()
{
	//	switch = 1;
	while(1)
	{ 
		wait(1);
		if(switch == 1){
			
			c_move(duck,vector(10*time_step,0,0),nullvector,GLIDE); 
			ent_animate(my, "walk", my.skill1, anm_cycle); 
			my.skill1 += 10 * time_step; // 10//number controls the animation speed
			
			//This part smoothes out the turn angles
			vec_to_angle(temp_pan,vec_diff(temp,pos_node,my.x));
			duck.pan += ang(temp_pan.pan -duck.pan)*pan_ang_smooth*time_step;
			duck.tilt += ang(temp_pan.tilt -duck.tilt)*tilt_ang_smooth*time_step;
			
		}
	}
}

action duck_target
{
	
	duck = me;
	
	move_duck();

	////////// attach entity to nearest path
	result = path_scan(me,my.x,my.pan,vector(360,180,1000));
	if (result == 0) { return; }
	if(result) { switch =1; } 

	//////////// find first waypoint
	path_getnode(my,1,pos_node, null);  // set vec to node position

	/////////// find direction and turn to it
	vec_to_angle(my.pan,vec_diff(temp,pos_node,my.x)); // look at NODE

	while(1)
	{
		wait(1);
		distance = vec_dist(my.x, pos_node);  // close to node?
		
		if(distance < 25)   // 25 is test number
		{
			node = path_nextnode(my,node,1);   
			path_getnode(my,node,pos_node, null); 
			vec_to_angle(temp_pan,vec_diff(temp,pos_node,my.x));
			wait(1);
		}
	}
}  

---

Any help appreciated.

I never worked with paths, but I think the problem is, that node is null after the last node was reached. There is no node with the number 0, wich could be a problem for path_nextnode();.

I would suggest, to add a simple if statement:

if(distance < 25)
{
node = path_nextnode(my,node,1);
if(!node){node = 1;} //if the last node was reached, start again with the first one
path_getnode(my,node,pos_node, null);
vec_to_angle(temp_pan,vec_diff(temp,pos_node,my.x));
wait(1);
}


I hope this helps,
Slin

yeah, it was as simple as that... Thanks for helping a noob like me!