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Control Point Metadata gets cleared.
#1
Question 
I'm trying to create a road with some lines on it programmatically.
I add the control points to the shape.
Then I add MetaCGOptions to the control points.
I set the hard edge and material options on the control point.
But then when the shape is build, the options are set back to default again in the scene.

If I mark the shape spline as dirty, the metadata is gone instantly.
Sync from hierarchy results in the same.

What is the right way to make that meta data stick?
Code:
public static Vector3[] ShapeSplinePositions(CurvySpline roadShape, int roadMaterial, float width,
float offsetY,
float heightUnderGround,
float offsetX,
IList<RoadLineObject> roadLines)
{

/*
* c = count
* shiftRight = how much the road is moved to the right of the center line.
*   <-       width      ->
* <-> offsetX = -0.5
*   0╔══[1═2]═|═════[3═4]═══╗c-3
*    ║  offsetY             ║
* ───╫──────────────────────╫────── terrain / control points
*░░░░║░░Height░under░ground░║░░░░░░
*░░░░║░░░░░░░░░░░░░░░░░░░░░░║░░░░░░
*░c-1╚══════════════════════╝c-2░░░
*░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░
*/

//make a clockwise shape
var halfWidth = Mathf.Abs(width / 2f);
var count = 4 + roadLines.Count * 2;
var positions = new Vector3[count];

//left
positions[0] = new Vector3(offsetX - halfWidth, offsetY, 0);
//the top surface.
for (int i = 0; i < roadLines.Count; i++)
{
positions[i * 2 + 1] = new Vector3(offsetX -halfWidth + roadLines[i].Location, offsetY, 0);
positions[i * 2 + 2] = new Vector3(offsetX -halfWidth + roadLines[i].Location + roadLines[i].Width, offsetY, 0);
}
//right
positions[count-3] = new Vector3(offsetX + halfWidth, offsetY, 0);
//right down
positions[count-2] = new Vector3(offsetX + halfWidth, -heightUnderGround, 0);
//left down
positions[count-1] = new Vector3(offsetX - halfWidth, -heightUnderGround, 0);

var segment = roadShape.Add(positions);

return positions;
}

private static void SetControlPointMetaData(int roadMaterial, IList<RoadLineObject> roadLines, IList<CurvySplineSegment> segment, int count)
{
{
var left = segment[0];
var leftCG = left.GetMetadata<MetaCGOptions>(true);
leftCG.MaterialID = roadMaterial;
leftCG.HardEdge = true;
}

for (var i = 0; i < roadLines.Count; i++)
{
var leftControlPoint = segment[i * 2 + 1];
var leftCG = leftControlPoint.GetMetadata<MetaCGOptions>(true);
leftCG.MaterialID = roadLines[i].Material;
leftCG.HardEdge = true;
var rightControlPoint = segment[i * 2 + 2];
var rightCG = rightControlPoint.GetMetadata<MetaCGOptions>(true);
rightCG.MaterialID = roadMaterial;
rightCG.HardEdge = true;
}

{
//from top right to bottom right
var controlPoint = segment[count - 3];
var controlPointCG = controlPoint.GetMetadata<MetaCGOptions>(true);
controlPointCG.MaterialID = 0;
controlPointCG.HardEdge = true;
}

{
//from bottom right to bottom left
var controlPoint = segment[count - 3];
var controlPointCG = controlPoint.GetMetadata<MetaCGOptions>(true);
controlPointCG.MaterialID = 0;
controlPointCG.HardEdge = true;
}

{
//from bottom left to top left
var controlPoint = segment[count - 3];
var controlPointCG = controlPoint.GetMetadata<MetaCGOptions>(true);
controlPointCG.MaterialID = 0;
controlPointCG.HardEdge = true;
}
}

private void BuildUpLines()
{
var markers = new List<RoadLineObject>(roadLineMarkers);
markers.Sort((a, b) => a.Location.CompareTo(b.Location));

RoadShape.Clear();
var positions = ShapeSplinePositions(RoadShape, roadMaterial, width, _offsetY, _heightUnderGround, _offsetX, markers);
SetControlPointMetaData(roadMaterial, markers, RoadShape.ControlPointsList, RoadShape.ControlPointsList.Count);
SetRoadTextureAndTiling();
RoadShape.SetDirtyAll();
}
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#2
Hi,
Which Curvy version are you using?
I tried to reproduce your issue but couldn't. Here is the simplified reproduction setup I used, inspired by your code.
Can you please test my reproduction scene in your setup and tell me the options are set back to default?


Attached Files
.zip   Bug repro.zip (Size: 4.39 KB / Downloads: 1)
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Reply
#3
(12-09-2019, 01:22 PM)_Aka_ Wrote: Hi,
Which Curvy version are you using?
I tried to reproduce your issue but couldn't. Here is the simplified reproduction setup I used, inspired by your code.
Can you please test my reproduction scene in your setup and tell me the options are set back to default?

Curvy 6.0.1
Unity 2019.12f

Your example works as it is supposed to.
I'm going to do some more debugging.
I'm dealing with some legacy code here that used to solve this problem by just calling build multiple times. Confused
Reply


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