localPosition.x not working?

Questions & Answers
1

Hi there,

I have set up the following code to place waypoints along the track in my game. It’s all working fine, waypoints are properly positioned and rotated but when I try to apply an offset to the local x position, it doesn’t work. My road is perfectly even, and when the offset is applied, each waypoint should be in the middle of the road, but it seems to be adjusting it to global space. I tried making the waypoints children but that made it worse. It’s probably something really simple but any help would be greatly appreciated.

#pragma strict

var fOffset : float; // Use to adjust how far from edge of road waypoint is to be set

function Start () 
{
	var roadMesh : Mesh = GetComponent(MeshFilter).mesh;
	var vertices : Vector3[] = roadMesh.vertices;
	var iWaypointGap : int = 8; // Use to set waypoint every ??? vertices
	
	for (var i = 0; i < (vertices.Length) - iWaypointGap; i += iWaypointGap) // Depending on road mesh, may need to be reverse for loop
	{
		// Add waypoint
		 
		var wayPoint = new GameObject(); // Create waypoint
		var newPos = transform.TransformPoint(vertices*); // Set to vertex's position in global space* 

  •  var newPos2 = transform.TransformPoint(vertices[i + iWaypointGap]); // Set to next vertex's position in global space* 

  •  wayPoint.transform.position = newPos; // Set waypoint to vertext position*

  •  wayPoint.transform.LookAt(newPos2); // Set waypoint rotation*

  •  //wayPoint.transform.localPosition.x -= fOffset;*

  •  wayPoint.name = "Waypoint_" + i / iWaypointGap;*

  • }*
    }

2

What about saving the localPosition before modification ?

I don’t know for JS but in c# you have to store position / scale values of a Transform before modification and set them as a whole Vector3. Trying to change only a value of a Transform Vector3 pushes an error.

Try something like this:

var localPos = wayPoint.transform.localPosition;
localPos.x -= fOffset;
wayPoint.transform.localPosition = localPos;

I hope it helps.

3

I’m not too sure why it wasn’t working originally but transform.right fixed it. Here’s the code, for anyone else who might be interested:

#pragma strict

var fOffset : float; // Use to adjust how far from middle of road waypoint is to be set
var waypointContainer : GameObject;

function Start () 
{
	var roadMesh : Mesh = GetComponent(MeshFilter).mesh;
	var roadVerts : Vector3[] = roadMesh.vertices; // Array of mesh vertices
	var iWaypointGap : int = 8; // Use to set waypoint every "iWaypointGap" vertices
	var fRoadWidth = Vector3.Distance(roadVerts[0], roadVerts[2]); // Get the distance between vertex 0 & 2
	
	for (var i = 0; i < (roadVerts.Length) - iWaypointGap; i += iWaypointGap) 	// Depending on road mesh, may need to
																				// iterate through the for loop backwards
	{
		var waypoint = new GameObject(); // Create waypoint
		
		waypoint.transform.parent = waypointContainer.transform; // Put into container to keep tidy in hierarchy
		
		var vertPos = transform.TransformPoint(roadVerts*); // Current vertex's position in global space* 

  •  var nextPos = transform.TransformPoint(roadVerts[i + iWaypointGap]); // Target vertex's position in global space* 

  •  waypoint.transform.position = vertPos; // Set waypoint position to current vertex position*

  •  waypoint.transform.LookAt(nextPos); // Set waypoint rotation*

_ var centrePos = waypoint.transform.position + (fRoadWidth / 2) * waypoint.transform.right; // Centre of road position_

  •  waypoint.transform.position = centrePos; // Set waypoint position to middle of the road*

  •  waypoint.name = "Waypoint_" + i / iWaypointGap; // Name and number waypoint*

  • }*
    }