private static Tuple<int, int, int> GetFieldPoint_XYZ(Point3D point, FluidField3D field)
{
int x = Convert.ToInt32(Math.Round(point.X * field.Size));
if (x < 0)
{
x = 0;
}
else if (x >= field.Size)
{
x = field.Size - 1;
}
int y = Convert.ToInt32(Math.Round(point.Y * field.Size));
if (y < 0)
{
y = 0;
}
else if (y >= field.Size)
{
y = field.Size - 1;
}
int z = Convert.ToInt32(Math.Round(point.Z * field.Size));
if (z < 0)
{
z = 0;
}
else if (z >= field.Size)
{
z = field.Size - 1;
}
return Tuple.Create(x, y, z);
}
private void Window_Loaded(object sender, RoutedEventArgs e)
{
try
{
// Field
_field = new FluidField3D(40);
_field.Diffusion = 0;
_field.Damping = 0;
// Sliders
PropertyInfo[] propsOptions = typeof(FluidField3D).GetProperties();
_propLinks.Add(new SliderShowValues.PropSync(trkDiffusion, propsOptions.Where(o => o.Name == "Diffusion").First(), _field, 0, .03));
_propLinks.Add(new SliderShowValues.PropSync(trkDamping, propsOptions.Where(o => o.Name == "Damping").First(), _field, 0, .1));
_propLinks.Add(new SliderShowValues.PropSync(trkTimestep, propsOptions.Where(o => o.Name == "TimeStep").First(), _field, 0, 100));
_propLinks.Add(new SliderShowValues.PropSync(trkIterations, propsOptions.Where(o => o.Name == "Iterations").First(), _field, 0, 20));
trkBrushSize.Minimum = 0;
trkBrushSize.Maximum = .5;
trkBrushSize.Value = .15;
trkVelocityMultiplier.Minimum = .1;
trkVelocityMultiplier.Maximum = 20;
trkVelocityMultiplier.Value = 3;
trkBrushDepth.Minimum = 0;
trkBrushDepth.Maximum = 1;
trkBrushDepth.Value = .5;
// Create a new image
Image img = new Image();
RenderOptions.SetBitmapScalingMode(img, BitmapScalingMode.NearestNeighbor);
RenderOptions.SetEdgeMode(img, EdgeMode.Aliased);
// Add this image to the canvas
grdFluid.Children.Add(img);
// Create the bitmap, and set
_bitmap = new WriteableBitmap(_field.Size, _field.Size, UtilityWPF.DPI, UtilityWPF.DPI, PixelFormats.Bgra32, null);
img.Source = _bitmap;
img.Stretch = Stretch.Fill;
// Timer
_timer = new DispatcherTimer();
_timer.Interval = TimeSpan.FromMilliseconds(1);
_timer.Tick += Timer_Tick;
_timer.IsEnabled = true;
// Need to manually set the scrollviewer's height (a binding can't be conditional - see Window_SizeChanged)
expanderScrollViewer.MaxHeight = expanderRow.ActualHeight;
_isInitialized = true;
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString(), this.Title, MessageBoxButton.OK, MessageBoxImage.Error);
}
}
private static int[] GetFieldSphere(Point3D point, double radius, FluidField3D field)
{
// Get the box that contains the return circle
var center = GetFieldPoint_XYZ(point, field);
var min = GetFieldPoint_XYZ(new Point3D(point.X - radius, point.Y - radius, point.Z - radius), field);
var max = GetFieldPoint_XYZ(new Point3D(point.X + radius, point.Y + radius, point.Z + radius), field);
// Get points that are inside the circle
List<int> retVal = new List<int>();
double maxDistance = radius * field.Size;
double maxDistanceSquared = maxDistance * maxDistance;
for (int x = min.Item1; x <= max.Item1; x++)
{
for (int y = min.Item2; y <= max.Item2; y++)
{
for (int z = min.Item3; z <= max.Item3; z++)
{
double dx = x - center.Item1;
double dy = y - center.Item2;
double dz = z - center.Item3;
double distanceSquared = (dx * dx) + (dy * dy) + (dz * dz);
if (distanceSquared <= maxDistanceSquared)
{
retVal.Add(field.Get1DIndex(x, y, z));
}
}
}
}
// Exit Function
return retVal.ToArray();
}
private static void DrawField(WriteableBitmap bitmap, FluidField3D field, ViewDirection viewDirection, byte[] colorZFront, byte[] colorZBack)
{
Int32Rect rect = new Int32Rect(0, 0, field.Size, field.Size);
int size = rect.Width * rect.Height * 4;
byte[] pixels = new byte[size];
double[] ink = field.Ink;
bool[] blocked = field.Blocked;
switch (viewDirection)
{
case ViewDirection.Front:
#region Front
DrawFieldSprtDoIt(pixels, ink, blocked, field.Size, colorZFront, colorZBack,
new AxisFor(Axis.X, 0, field.Size - 1),
new AxisFor(Axis.Y, 0, field.Size - 1),
new AxisFor(Axis.Z, field.Size - 1, 0)); // pixel z needs to start at the back, because the colors are overlaid
#endregion
break;
case ViewDirection.Right:
#region Right
DrawFieldSprtDoIt(pixels, ink, blocked, field.Size, colorZFront, colorZBack,
new AxisFor(Axis.Z, 0, field.Size - 1),
new AxisFor(Axis.Y, 0, field.Size - 1),
new AxisFor(Axis.X, 0, field.Size - 1));
#endregion
break;
case ViewDirection.Left:
#region Left
DrawFieldSprtDoIt(pixels, ink, blocked, field.Size, colorZFront, colorZBack,
new AxisFor(Axis.Z, field.Size - 1, 0),
new AxisFor(Axis.Y, 0, field.Size - 1),
new AxisFor(Axis.X, field.Size - 1, 0));
#endregion
break;
case ViewDirection.Top:
#region Top
DrawFieldSprtDoIt(pixels, ink, blocked, field.Size, colorZFront, colorZBack,
new AxisFor(Axis.X, 0, field.Size - 1),
new AxisFor(Axis.Z, field.Size - 1, 0),
new AxisFor(Axis.Y, field.Size - 1, 0));
#endregion
break;
case ViewDirection.Bottom:
#region Bottom
DrawFieldSprtDoIt(pixels, ink, blocked, field.Size, colorZFront, colorZBack,
new AxisFor(Axis.X, 0, field.Size - 1),
new AxisFor(Axis.Z, 0, field.Size - 1),
new AxisFor(Axis.Y, 0, field.Size - 1));
#endregion
break;
case ViewDirection.Back:
#region Back
//NOTE: This one is up for interpretation. I will rotate left to right, because I think that is more intuitive. If rotating
//top to bottom, it would be upside down from the way I am presenting
DrawFieldSprtDoIt(pixels, ink, blocked, field.Size, colorZFront, colorZBack,
new AxisFor(Axis.X, field.Size - 1, 0),
new AxisFor(Axis.Y, 0, field.Size - 1),
new AxisFor(Axis.Z, 0, field.Size - 1));
// The alternate
//DrawField_DoIt(pixels, ink, blocked, field.Size, colorZFront, colorZBack,
// new AxisFor(Axis.X, 0, field.Size - 1),
// new AxisFor(Axis.Y, field.Size - 1, 0),
// new AxisFor(Axis.Z, 0, field.Size - 1));
#endregion
break;
default:
throw new ApplicationException("Unknown ViewDirection: " + viewDirection.ToString());
}
bitmap.WritePixels(rect, pixels, rect.Width * 4, 0);
}
public FluidFieldField(FluidField3D field)
{
_field = field;
}
private void Window_Loaded(object sender, RoutedEventArgs e)
{
try
{
// Init World
_world = new World();
_world.Updating += new EventHandler<WorldUpdatingArgs>(World_Updating);
_world.SetWorldSize(new Point3D(-100, -100, -100), new Point3D(100, 100, 100));
_world.UnPause();
// Camera Trackball
_trackball = new TrackBallRoam(_camera);
//_trackball.ShouldHitTestOnOrbit = true;
_trackball.EventSource = grdViewPort; //NOTE: If this control doesn't have a background color set, the trackball won't see events (I think transparent is ok, just not null)
_trackball.AllowZoomOnMouseWheel = true;
_trackball.Mappings.AddRange(TrackBallMapping.GetPrebuilt(TrackBallMapping.PrebuiltMapping.MouseComplete));
//_trackball.GetOrbitRadius += new GetOrbitRadiusHandler(Trackball_GetOrbitRadius);
// Trackball Controls
SetupModelTrackball();
SetupFlowTrackball();
// Fluid lines
AddFluidVisuals(Convert.ToInt32(NUMFLUIDVISUALS * _flowViscosity));
// Force lines
_fluidHullForceLines = new ScreenSpaceLines3D(true);
_fluidHullForceLines.Color = _colors.ForceLine;
_fluidHullForceLines.Thickness = 2d;
_viewport.Children.Add(_fluidHullForceLines);
// Field - may want to only add this when a body is added
_field = new FluidField3D(20);
_field.Diffusion = 0;
_field.Damping = 0; //GetFluidViscocity(); // this stays zero (see comments in VelocityViscocityChanged)
_field.BoundryType = FluidFieldBoundryType3D.Open_Slaved;
_fieldUniform = new FluidFieldUniform();
_field.OpenBoundryParent = _fieldUniform;
_field.SizeWorld = 10d; // This changes whenever a body is swapped out
_fieldCells = _field.GetCells();
_fieldField = new FluidFieldField(_field);
_fieldField.Viscosity = GetFluidViscocity();
_isInitialized = true;
ShowHideFluidBoundry();
ShowHideBlockedCells();
VelocityViscocityChanged();
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString(), this.Title, MessageBoxButton.OK, MessageBoxImage.Error);
}
}
public static int[] GetBlockedCells(FluidField3D field, IEnumerable<ITriangleIndexed[]> hulls)
{
//NOTE: The hulls need to be in model coords
// Get populated hulls
ITriangleIndexed[][] hulls1 = hulls.Where(o => o.Length > 0).ToArray();
if (hulls1.Length == 0)
{
return new int[0]; // no hulls were passed in
}
// Get the location of all the cells
Rectangle3DIndexedMapped[] cells1 = field.GetCells();
#region Filter AABB
// Remove non aabb matches
Rect3D[] aabbs = hulls1.Select(o => Math3D.GetAABB_Rect(o[0].AllPoints)).ToArray();
Rectangle3DIndexedMapped[] cells2 = cells1.Where(o =>
{
Rect3D cellRect = o.ToRect3D();
return aabbs.Any(p => p.OverlapsWith(cellRect));
}).ToArray();
if (cells2.Length == 0)
{
return new int[0]; // this should never happen
}
#endregion
//TODO: When multiple hulls are passed in, ignore cells that are outside of a particular hull's aabb
#region Test triangles
// Look for intersecting edges
int[] edgeMatches = new int[0];
if (cells2.Length > 0)
{
// aabbs is for entire hulls. This needs to be for each triangle in each hull
Tuple<ITriangle, Rect3D>[] hullTrianglesAABBs = hulls.SelectMany(o => o.Select(p => new Tuple<ITriangle, Rect3D>(p, Math3D.GetAABB_Rect(p)))).ToArray();
// Now compare each remaining candidate cell to each triangle of each hull
edgeMatches = GetBlockedCellsSprtEdgeMap(cells2).
AsParallel().
Where(o => hullTrianglesAABBs.Any(p => IsEdgeMatch(p, o.Item1))).
SelectMany(o => o.Item2.Select(p => cells2[p].Mapping.Offset1D)). // add all the cells that neighbor this corner point
Distinct(). // need distinct, since cells were added multiple times
ToArray();
}
#endregion
// Exit Function
return edgeMatches;
}
public static int[] GetBlockedCells(FluidField3D field, ITriangleIndexed[] hull)
{
return GetBlockedCells(field, new ITriangleIndexed[][] { hull });
}