public static Coordinate FindElement2(int[][] matrix, Coordinate origin, Coordinate dest, int x)
{
if (!origin.Inbounds(matrix) || !dest.Inbounds(matrix))
{
return null;
}
if (matrix[origin.row][origin.column] == x)
{
return origin;
}
else if (!origin.IsBefore(dest))
{
return null;
}
/* Set start to start of diagonal and end to the end of the diagonal. Since
* the grid may not be square, the end of the diagonal may not equal dest.
*/
Coordinate start = (Coordinate)origin.Clone();
int diagDist = Math.Min(dest.row - origin.row, dest.column - origin.column);
Coordinate end = new Coordinate(start.row + diagDist, start.column + diagDist);
Coordinate p = new Coordinate(0, 0);
/* Do binary search on the diagonal, looking for the first element greater than x */
while (start.IsBefore(end))
{
p.SetToAverage(start, end);
if (x > matrix[p.row][p.column])
{
start.row = p.row + 1;
start.column = p.column + 1;
}
else {
end.row = p.row - 1;
end.column = p.column - 1;
}
}
/* Split the grid into quadrants. Search the bottom left and the top right. */
return PartitionAndSearch(matrix, origin, dest, start, x);
}
/// <summary>
///
/// </summary>
/// <param name="errorType"></param>
/// <param name="pt"></param>
public TopologyValidationError(TopologyValidationErrorType errorType, Coordinate pt)
{
_errorType = errorType;
if (pt != null)
_pt = (Coordinate)pt.Clone();
}
public Coordinate Transform(Coordinate coordinate)
{
var xy = new[] { coordinate.X, coordinate.Y };
double[] z = null;
if (!coordinate.Z.Equals(Coordinate.NullOrdinate))
z = new[] { coordinate.Z };
Reproject.ReprojectPoints(xy, z, Source, Target, 0, 1);
var ret = (Coordinate)coordinate.Clone();
ret.X = xy[0];
ret.Y = xy[1];
if (z != null)
ret.Z = z[0];
return ret;
}
/// <summary>
///
/// </summary>
/// <param name="errorType"></param>
/// <param name="pt"></param>
public TopologyValidationError(TopologyValidationErrors errorType, Coordinate pt)
{
this.errorType = errorType;
if(pt != null)
this.pt = (Coordinate) pt.Clone();
}
private RaycastResult raycastChunk(Vector3 start, Vector3 end, Chunk c)
{
Vector3 actualStart = start, actualEnd = end;
start -= new Vector3(c.X, c.Y, c.Z);
end -= new Vector3(c.X, c.Y, c.Z);
Coordinate startCoord = new Coordinate { X = (int)start.X, Y = (int)start.Y, Z = (int)start.Z };
Coordinate endCoord = new Coordinate { X = (int)end.X, Y = (int)end.Y, Z = (int)end.Z };
int dx = ((start.X < end.X) ? 1 : ((start.X > end.X) ? -1 : 0));
int dy = ((start.Y < end.Y) ? 1 : ((start.Y > end.Y) ? -1 : 0));
int dz = ((start.Z < end.Z) ? 1 : ((start.Z > end.Z) ? -1 : 0));
float minx = startCoord.X, maxx = minx + 1.0f;
float tx = ((start.X > end.X) ? (start.X - minx) : (maxx - start.X)) / Math.Abs(end.X - start.X);
float miny = startCoord.Y, maxy = miny + 1.0f;
float ty = ((start.Y > end.Y) ? (start.Y - miny) : (maxy - start.Y)) / Math.Abs(end.Y - start.Y);
float minz = startCoord.Z, maxz = minz + 1.0f;
float tz = ((start.Z > end.Z) ? (start.Z - minz) : (maxz - start.Z)) / Math.Abs(end.Z - start.Z);
float deltatx = 1.0f / Math.Abs(end.X - start.X);
float deltaty = 1.0f / Math.Abs(end.Y - start.Y);
float deltatz = 1.0f / Math.Abs(end.Z - start.Z);
Coordinate coord = startCoord.Clone();
Direction normal = Direction.None;
Direction xDirection = dx > 0 ? Direction.NegativeX : (dx < 0 ? Direction.PositiveX : Direction.None);
Direction yDirection = dy > 0 ? Direction.NegativeY : (dy < 0 ? Direction.PositiveY : Direction.None);
Direction zDirection = dz > 0 ? Direction.NegativeZ : (dz < 0 ? Direction.PositiveZ : Direction.None);
for (; ; )
{
if ((coord.X >= 0 && coord.X < this.chunkSize
&& coord.Y >= 0 && coord.Y < this.chunkSize
&& coord.Z >= 0 && coord.Z < this.chunkSize)
&& c.Data[coord.X, coord.Y, coord.Z] != null)
{
Coordinate actualCoord = coord.Move(c.X, c.Y, c.Z);
// Found intersection
Vector3 ray = actualEnd - actualStart;
Vector3 norm = normal == Direction.None ? -Vector3.Normalize(ray) : normal.GetVector();
Vector3 planePosition = new Vector3(actualCoord.X + 0.5f, actualCoord.Y + 0.5f, actualCoord.Z + 0.5f) + norm * 0.5f;
return new RaycastResult { Coordinate = actualCoord, Normal = normal, Position = this.GetAbsolutePosition(actualStart + (ray * Vector3.Dot((planePosition - actualStart), norm) / Vector3.Dot(ray, norm))) };
}
if (tx <= ty && tx <= tz)
{
if (coord.X == endCoord.X)
break;
tx += deltatx;
coord.X += dx;
normal = xDirection;
}
else if (ty <= tz)
{
if (coord.Y == endCoord.Y)
break;
ty += deltaty;
coord.Y += dy;
normal = yDirection;
}
else
{
if (coord.Z == endCoord.Z)
break;
tz += deltatz;
coord.Z += dz;
normal = zDirection;
}
}
return new RaycastResult { Coordinate = null };
}
private IEnumerable<Chunk> rasterizeChunks(Vector3 startRelative, Vector3 endRelative)
{
// Adapted from PolyVox
// http://www.volumesoffun.com/polyvox/documentation/library/doc/html/_raycast_8inl_source.html
startRelative = (startRelative - new Vector3(this.minX, this.minY, this.minZ)) / this.chunkSize;
endRelative = (endRelative - new Vector3(this.minX, this.minY, this.minZ)) / this.chunkSize;
Coordinate startCoord = new Coordinate { X = (int)startRelative.X, Y = (int)startRelative.Y, Z = (int)startRelative.Z };
Coordinate endCoord = new Coordinate { X = (int)endRelative.X, Y = (int)endRelative.Y, Z = (int)endRelative.Z };
int dx = ((startRelative.X < endRelative.X) ? 1 : ((startRelative.X > endRelative.X) ? -1 : 0));
int dy = ((startRelative.Y < endRelative.Y) ? 1 : ((startRelative.Y > endRelative.Y) ? -1 : 0));
int dz = ((startRelative.Z < endRelative.Z) ? 1 : ((startRelative.Z > endRelative.Z) ? -1 : 0));
float minx = startCoord.X, maxx = minx + 1.0f;
float tx = ((startRelative.X > endRelative.X) ? (startRelative.X - minx) : (maxx - startRelative.X)) / Math.Abs(endRelative.X - startRelative.X);
float miny = startCoord.Y, maxy = miny + 1.0f;
float ty = ((startRelative.Y > endRelative.Y) ? (startRelative.Y - miny) : (maxy - startRelative.Y)) / Math.Abs(endRelative.Y - startRelative.Y);
float minz = startCoord.Z, maxz = minz + 1.0f;
float tz = ((startRelative.Z > endRelative.Z) ? (startRelative.Z - minz) : (maxz - startRelative.Z)) / Math.Abs(endRelative.Z - startRelative.Z);
float deltatx = 1.0f / Math.Abs(endRelative.X - startRelative.X);
float deltaty = 1.0f / Math.Abs(endRelative.Y - startRelative.Y);
float deltatz = 1.0f / Math.Abs(endRelative.Z - startRelative.Z);
Coordinate coord = startCoord.Clone();
Direction xDirection = dx > 0 ? Direction.NegativeX : (dx < 0 ? Direction.PositiveX : Direction.None);
Direction yDirection = dy > 0 ? Direction.NegativeY : (dy < 0 ? Direction.PositiveY : Direction.None);
Direction zDirection = dz > 0 ? Direction.NegativeZ : (dz < 0 ? Direction.PositiveZ : Direction.None);
for (; ; )
{
if (coord.X >= 0 && coord.X < this.maxChunks
&& coord.Y >= 0 && coord.Y < this.maxChunks
&& coord.Z >= 0 && coord.Z < this.maxChunks)
yield return this.chunks[coord.X, coord.Y, coord.Z];
if (tx <= ty && tx <= tz)
{
if (coord.X == endCoord.X)
break;
tx += deltatx;
coord.X += dx;
}
else if (ty <= tz)
{
if (coord.Y == endCoord.Y)
break;
ty += deltaty;
coord.Y += dy;
}
else
{
if (coord.Z == endCoord.Z)
break;
tz += deltatz;
coord.Z += dz;
}
}
}
private IEnumerable<Coordinate> rasterize(Vector3 start, Vector3 end, Coordinate startCoord, Coordinate endCoord)
{
// Adapted from PolyVox
// http://www.volumesoffun.com/polyvox/documentation/library/doc/html/_raycast_8inl_source.html
int dx = ((start.X < end.X) ? 1 : ((start.X > end.X) ? -1 : 0));
int dy = ((start.Y < end.Y) ? 1 : ((start.Y > end.Y) ? -1 : 0));
int dz = ((start.Z < end.Z) ? 1 : ((start.Z > end.Z) ? -1 : 0));
float minx = startCoord.X, maxx = minx + 1.0f;
float tx = ((start.X > end.X) ? (start.X - minx) : (maxx - start.X)) / Math.Abs(end.X - start.X);
float miny = startCoord.Y, maxy = miny + 1.0f;
float ty = ((start.Y > end.Y) ? (start.Y - miny) : (maxy - start.Y)) / Math.Abs(end.Y - start.Y);
float minz = startCoord.Z, maxz = minz + 1.0f;
float tz = ((start.Z > end.Z) ? (start.Z - minz) : (maxz - start.Z)) / Math.Abs(end.Z - start.Z);
float deltatx = 1.0f / Math.Abs(end.X - start.X);
float deltaty = 1.0f / Math.Abs(end.Y - start.Y);
float deltatz = 1.0f / Math.Abs(end.Z - start.Z);
Coordinate coord = startCoord.Clone();
Direction normal = Direction.None;
Direction xDirection = dx > 0 ? Direction.NegativeX : (dx < 0 ? Direction.PositiveX : Direction.None);
Direction yDirection = dy > 0 ? Direction.NegativeY : (dy < 0 ? Direction.PositiveY : Direction.None);
Direction zDirection = dz > 0 ? Direction.NegativeZ : (dz < 0 ? Direction.PositiveZ : Direction.None);
for (; ; )
{
yield return coord;
if (tx <= ty && tx <= tz)
{
if (coord.X == endCoord.X)
break;
tx += deltatx;
coord.X += dx;
normal = xDirection;
}
else if (ty <= tz)
{
if (coord.Y == endCoord.Y)
break;
ty += deltaty;
coord.Y += dy;
normal = yDirection;
}
else
{
if (coord.Z == endCoord.Z)
break;
tz += deltatz;
coord.Z += dz;
normal = zDirection;
}
}
}
public void TestClone()
{
Coordinate c = new Coordinate(100.0, 200.0, 50.0);
Coordinate clone = (Coordinate)c.Clone();
Assert.IsTrue(c.Equals3D(clone));
}