public static IBlock Extrude(IPoly polygon, Vector3 direction, float floorDistance, float ceilingDistance, Func <IEnumerable <Vector3>, IPoly> polyConstructor = null, Func <IEnumerable <IPoly>, IBlock> blockConstructor = null)
{
if (polyConstructor == null)
{
polyConstructor = polygon.Clone;
}
IPoly floor = polygon.Clone(polygon.GetPoints().Select(x => x + direction * floorDistance));
IPoly ceiling = polygon.Clone(polygon.GetPoints().Select(x => x + direction * ceilingDistance));
List <IPoly> faces = new List <IPoly>();
for (int i = 0; i < polygon.Resolution; i++)
{
Vector3 lr = floor.GetPoint(i);
Vector3 ll = floor.GetPoint((i + 1) % polygon.Resolution);
Vector3 ul = ceiling.GetPoint((i + 1) % polygon.Resolution);
Vector3 ur = ceiling.GetPoint(i);
faces.Add(polyConstructor(new Vector3[] { lr, ll, ul, ur }));
}
faces.Add(polyConstructor(ceiling.GetPoints()));
faces.Add(polyConstructor(floor.GetPoints().Reverse()));
if (blockConstructor == null)
{
blockConstructor = (x) => new Block(x);
}
return(blockConstructor(faces));
}
/// <summary>
/// Contract the polygon toward a specified point.
/// locks controlls which edges are not able to move to complete the operation
/// </summary>
/// <param name="poly"></param>
/// <param name="center"></param>
/// <param name="tValue"></param>
/// <param name="lockList"></param>
/// <returns></returns>
public static IPoly Contract(this IPoly poly, Vector3 center, float tValue, bool[] locks)
{
if (locks == null)
{
return(Contract(poly, center, tValue));
}
else
{
Vector3[] output = new Vector3[poly.Resolution];
for (int i = 0; i < poly.Resolution; i++)
{
Vector3 point = poly.GetPoint(i);
bool rightLock = locks[i];
int minusIndex = (i + poly.Resolution - 1) % poly.Resolution;
bool leftLock = locks[minusIndex];
if (!rightLock && !leftLock)
{
output[i] = Vector3.Lerp(point, center, tValue);
}
else if (leftLock && rightLock)
{
output[i] = point;
}
else if (leftLock && !rightLock)
{
output[i] = Vector3.Lerp(point, poly.GetEdge(minusIndex).Center(), tValue);
}
else if (!leftLock && rightLock)
{
output[i] = Vector3.Lerp(point, poly.GetEdge(i).Center(), tValue);
}
}
return(poly.Clone(output));
}
}
public static IPoly RemoveDuplicateVerticies(IPoly poly)
{
List <Vector3> output = new List <Vector3>();
for (int i = 0; i < poly.Resolution; i++)
{
if (output.Count == 0)
{
output.Add(poly.GetPoint(i));
}
else
{
Vector3 point = poly.GetPoint(i);
Vector3 last = output[output.Count - 1];
if (!Math3d.Compare(point, last))
{
output.Add(point);
}
}
}
if (Math3d.Compare(output[0], output[output.Count - 1]))
{
output.RemoveAt(0);
}
return(poly.Clone(output.ToArray()));
}
/// <summary>
/// Make a concave polygon into a convex one
/// </summary>
/// <param name="poly"></param>
/// <returns></returns>
public static IEnumerable <IPoly> MakeConvex(IPoly poly)
{
List <Vector3> input = poly.GetPoints().ToList();
List <List <Vector3> > output = BayazitDecomposer.ConvexPartition(input);
return(output.Select(x => poly.Clone(x.ToArray())));
}
/// <summary>
/// Contract the polygon toward a specified point.
/// </summary>
/// <param name="distance"></param>
/// <param name="center"></param>
/// <param name="lockList"></param>
/// <returns></returns>
public static IPoly Contract(this IPoly poly, Vector3 center, float tValue)
{
Vector3[] output = new Vector3[poly.Resolution];
for (int i = 0; i < poly.Resolution; i++)
{
output[i] = Vector3.Lerp(poly.GetPoint(i), center, tValue);
}
return(poly.Clone(output));
}
public IPoly Clone()
{
return(new TexturedPoly(poly.Clone(), material, matrix));
}
public IPoly Clone()
{
return(new CSGShape(poly.Clone(), rValue));
}