private void ConstructMesh()
{
trackMesh.Clear();
List <Vector2> texCoords = new List <Vector2> ();
List <int> indices = new List <int> ();
meshCoords = new List <Vector3> ();
CatmullRom CRS = new CatmullRom(diffCoords);
int diffCoordsSize = CRS.pts.Count;
float step = 1.0f / (diffCoordsSize * smoothness);
float iterator = 0.0f;
List <Vector3> outerCoords = new List <Vector3> ();
List <Vector3> innerCoords = new List <Vector3> ();
for (int i = 0; i < diffCoordsSize * smoothness; i++)
{
outerCoords.Add(CRS.DisplaceBy(trackWidth, iterator, step));
innerCoords.Add(CRS.Interpolate(iterator));
iterator += step;
}
WeldOverlappingSections(outerCoords, innerCoords);
for (int i = 0; i < diffCoordsSize * smoothness; i++)
{
meshCoords.Add(innerCoords [i]);
meshCoords.Add(outerCoords [i]);
meshCoords.Add(innerCoords [i]);
meshCoords.Add(outerCoords [i]);
texCoords.Add(new Vector2(0, 0));
texCoords.Add(new Vector2(1, 0));
texCoords.Add(new Vector2(0, 1));
texCoords.Add(new Vector2(1, 1));
}
int meshCount = meshCoords.Count;
for (int i = 0; i < meshCount; i++)
{
// Tri 1
indices.Add(i % meshCount);
indices.Add((i + 2) % meshCount);
indices.Add((i + 1) % meshCount);
// Tri 2
indices.Add((i + 2) % meshCount);
indices.Add((i + 3) % meshCount);
indices.Add((i + 1) % meshCount);
}
trackMesh.vertices = meshCoords.ToArray();
trackMesh.uv = texCoords.ToArray();
trackMesh.RecalculateNormals();
trackMesh.Optimize();
trackMesh.SetIndices(indices.ToArray(), MeshTopology.LineStrip, 0);
}