public void GenerateOutput(List <Index2> outputCull, out List <Vector3> vertices, out List <int> indices)
{
var newVertices = new List <Vector3>((int)mesh.PointCount);
var newIndices = new List <int>((int)mesh.PointCount * 3);
var vertexArrayPositions = new int[heightMap.Width, heightMap.Height];
vertexArrayPositions.Fill(-1);
mesh.OverFaces((tri, obj) =>
{
var triVertices = new[]
{
tri.Point1,
tri.Point2,
tri.Point3
};
foreach (var holeMarker in outputCull)
{
var count = 0;
foreach (var vertex in triVertices)
{
var idx = new Index2
{
X = (int)vertex.X,
Y = (int)vertex.Y
};
// The triangle abuts one of the hole markers
if (holeMarker == idx)
{
return;
}
// The triangle is within the hole markers neighborhood
if (Index2.Abs(idx - holeMarker) <= Index2.One)
{
count++;
}
}
if (count > 2)
{
return;
}
}
if (GeometryHelpers.IsCounterClockwise(triVertices[0], triVertices[1], triVertices[2]))
{
var temp = triVertices[1];
triVertices[1] = triVertices[2];
triVertices[2] = temp;
}
foreach (var vertex in triVertices)
{
if (vertexArrayPositions[(int)vertex.X, (int)vertex.Y] == -1)
{
vertexArrayPositions[(int)vertex.X, (int)vertex.Y] = newVertices.Count;
newVertices.Add(new Vector3(vertex, heightMap.Eval(vertex.X, vertex.Y)));
}
newIndices.Add(vertexArrayPositions[(int)vertex.X, (int)vertex.Y]);
}
});
vertices = newVertices;
indices = newIndices;
}
