public static void GeneratePlane(IList <Vector3> coplanarPoints, Transform transform, Vector2 texScale, bool doubleSided, out IList <CSGVertex> vertices, out IList <uint> indices)
{
if (coplanarPoints.Count < 2)
{
throw new ArgumentException("Must supply at least 3 points.", "coplanarPoints");
}
CSGPlane[] planes = new CSGPlane[2];
Vector3 barycentre = Vector3.ZERO;
coplanarPoints.ForEach(point => barycentre += point);
barycentre /= coplanarPoints.Count;
CSGVertex[] csgVertices;
Plane plane = Plane.FromPoints(coplanarPoints[0], coplanarPoints[1], coplanarPoints[2]);
Vector3 uvX = (coplanarPoints[0] - barycentre).ToUnit();
Vector3 uvY = uvX.Cross(plane.Normal);
Vector2 invTexDimensions = new Vector2(1f / texScale.X, 1f / texScale.Y);
#region Plane A
csgVertices = new CSGVertex[coplanarPoints.Count];
plane = -plane;
for (int i = 0; i < coplanarPoints.Count; ++i)
{
Vector3 centreOffset = coplanarPoints[i] - barycentre;
csgVertices[csgVertices.Length - (i + 1)] = new CSGVertex(
coplanarPoints[i],
plane.Normal,
new Vector2(centreOffset.Dot(uvX), centreOffset.Dot(uvY)).Scale(invTexDimensions)
);
}
planes[0] = new CSGPlane(plane, csgVertices, barycentre);
#endregion
#region Plane B
if (doubleSided)
{
csgVertices = new CSGVertex[coplanarPoints.Count];
for (int i = 0; i < coplanarPoints.Count; ++i)
{
Vector3 centreOffset = coplanarPoints[i] - barycentre;
csgVertices[i] = new CSGVertex(
coplanarPoints[i],
plane.Normal,
new Vector2(centreOffset.Dot(uvX), centreOffset.Dot(uvY)).Scale(invTexDimensions)
);
}
planes[1] = new CSGPlane(plane, csgVertices, barycentre);
}
#endregion
for (int i = 0; i < (doubleSided ? 2 : 1); ++i)
{
planes[i] = planes[i].Transform(transform, planes[i].Center);
}
CreateVBAndIB(planes.Take(doubleSided ? 2 : 1).ToList(), out vertices, out indices, false);
}
