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 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 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 static void DrawFieldSprtDoIt(byte[] pixels, double[] ink, bool[] blocked, int size, byte[] colorZFront, byte[] colorZBack, AxisFor pixelX, AxisFor pixelY, AxisFor pixelZ)
{
List <Mapping_2D_1D> flattened = new List <Mapping_2D_1D>();
// Setup the pixel array
//for (int y2D = pixelY.Start; pixelY.IsPos ? y2D <= pixelY.Stop : y2D >= pixelY.Stop; y2D += pixelY.Increment)
foreach (int y2D in pixelY.Iterate())
{
int offsetY = pixelY.GetValueForOffset(y2D) * size;
//for (int x2D = pixelX.Start; pixelX.IsPos ? x2D <= pixelX.Stop : x2D >= pixelX.Stop; x2D += pixelX.Increment)
foreach (int x2D in pixelX.Iterate())
{
int offset = offsetY + pixelX.GetValueForOffset(x2D);
flattened.Add(new Mapping_2D_1D(x2D, y2D, offset));
}
}
// Each pixel of the output bitmap can be added up independently, so employ some threading
flattened.AsParallel().ForAll(o =>
{
//TODO: Color is 6.5 times slower than byte array
List <byte[]> colorColumn = new List <byte[]>();
for (int z2D = pixelZ.Start; pixelZ.IsPos?z2D <= pixelZ.Stop : z2D >= pixelZ.Stop; z2D += pixelZ.Increment)
{
int x = -1, y = -1, z = -1;
pixelX.Set3DIndex(ref x, ref y, ref z, o.X);
pixelY.Set3DIndex(ref x, ref y, ref z, o.Y);
pixelZ.Set3DIndex(ref x, ref y, ref z, z2D);
int index = FluidField3D.Get1DIndex(x, y, z, size);
if (blocked[index])
{
// Blocked cells are all white, so save the overlay method a bit of work, and throw out everything behind this
colorColumn.Clear();
colorColumn.Add(new byte[] { 255, 255, 255, 255 });
continue;
}
double inkCell = ink[index];
if (Math1D.IsNearZero(inkCell))
{
continue;
}
byte[] depthColor = UtilityWPF.AlphaBlend(colorZBack, colorZFront, UtilityCore.GetScaledValue_Capped(0, 1, 0, size - 1, z));
int alpha = Convert.ToInt32(Math.Round(inkCell * 255));
if (alpha < 0)
{
alpha = 0;
}
else if (alpha > 255)
{
alpha = 255;
}
colorColumn.Add(new byte[] { Convert.ToByte(alpha), depthColor[1], depthColor[2], depthColor[3] });
}
byte[] color = colorColumn.Count > 0 ? UtilityWPF.OverlayColors(colorColumn) : new byte[] { 0, 0, 0, 0 };
pixels[o.Offset1D * 4 + 0] = color[3]; // Blue
pixels[o.Offset1D * 4 + 1] = color[2]; // Green
pixels[o.Offset1D * 4 + 2] = color[1]; // Red
pixels[o.Offset1D * 4 + 3] = color[0]; // Alpha
});
}
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);
}
