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fix vertex/triangle mismatch #3

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Merged
david-rhodes merged 1 commit into from
Mar 31, 2017
Merged

fix vertex/triangle mismatch #3

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30 changes: 18 additions & 12 deletions ...ct/Assets/Mapbox/Core/Unity/MeshGeneration/Modifiers/MeshModifiers/PolygonMeshModifier.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -6,7 +6,7 @@ namespace Mapbox.Unity.MeshGeneration.Modifiers
using TriangleNet.Geometry;
using UnityEngine;
using Mapbox.Unity.MeshGeneration.Data;

[CreateAssetMenu(menuName = "Mapbox/Modifiers/Polygon Mesh Modifier")]
public class PolygonMeshModifier : MeshModifier
{
Expand All @@ -17,20 +17,14 @@ public override void Run(VectorFeatureUnity feature, MeshData md)
if (md.Vertices.Distinct().Count() < 3)
return;

var verts = CreateRoofTriangulation(md.Vertices);
md.Triangles.Add(verts);
}

private List<int> CreateRoofTriangulation(List<Vector3> corners)
{
var data = new List<int>();
var _mesh = new TriangleNet.Mesh();
var inp = new InputGeometry(corners.Count);
for (int i = 0; i < corners.Count; i++)
var inp = new InputGeometry(md.Vertices.Count);
for (int i = 0; i < md.Vertices.Count; i++)
{
var v = corners[i];
var v = md.Vertices[i];
inp.AddPoint(v.x, v.z);
inp.AddSegment(i, (i + 1) % corners.Count);
inp.AddSegment(i, (i + 1) % md.Vertices.Count);
}
_mesh.Behavior.Algorithm = TriangulationAlgorithm.SweepLine;
_mesh.Behavior.Quality = true;
Expand All @@ -42,7 +36,19 @@ private List<int> CreateRoofTriangulation(List<Vector3> corners)
data.Add(tri.P0);
data.Add(tri.P2);
}
return data;

if (_mesh.Vertices.Count != md.Vertices.Count)
{
md.Vertices.Clear();
using (var sequenceEnum = _mesh.Vertices.GetEnumerator())
{
while (sequenceEnum.MoveNext())
{
md.Vertices.Add(new Vector3((float)sequenceEnum.Current.x, 0, (float)sequenceEnum.Current.y));
}
}
}
md.Triangles.Add(data);
}
}
}