/// <summary>
/// Visualises 2D data to a bitmap.
/// </summary>
/// <param name="bitmap">Bitmap.</param>
/// <param name="volume">2D data.</param>
/// <param name="volumeBoundingBox">Bounding box.</param>
public static void Visualise2D(Bitmap bitmap, VolumeData2D volume, BoundingBox2D volumeBoundingBox)
{
var colors = SetupColors(volume.Cells.Count);
// Access bitmap data
int width = bitmap.Width;
int height = bitmap.Height;
BitmapData bitmapData = bitmap.LockBits(new Rectangle(0, 0, width, height), ImageLockMode.WriteOnly, PixelFormat.Format32bppArgb);
unsafe
{
// Get pointer to bitmap data
byte *pointer = (byte *)bitmapData.Scan0;
// Setup a point
var point = new Vector2D();
// For each pixel of a bitmap find a cell and color the pixel.
for (int i = 0; i < height; i++)
{
// Remap pixel to a position in 3D space.
point.Y = MathUtils.Remap(i, 0, height, volumeBoundingBox.Max.Y, volumeBoundingBox.Min.Y);
for (int j = 0; j < width; j++)
{
// Remap pixel to a position in 3D space
point.X = MathUtils.Remap(j, 0, width, volumeBoundingBox.Min.X, volumeBoundingBox.Max.X);
// For each cell check if it contains the point
for (int k = 0; k < volume.Cells.Count; k++)
{
if (volume.Cells[k].Contains(point))
{
// Color the pixel
pointer[0] = colors[k].B;
pointer[1] = colors[k].G;
pointer[2] = colors[k].R;
pointer[3] = colors[k].A;
break;
}
}
pointer += BytesPerPixel;
}
}
}
bitmap.UnlockBits(bitmapData);
}
/// <summary>
/// Test triangulation volumetric data in 2D.
/// </summary>
public static void TestFromTriangulationSingleTriangle()
{
var vertices = new List <Vertex>()
{
new Vertex(0, 0),
new Vertex(1, 0),
new Vertex(0, 1)
};
var triangles = new List <Triangle>()
{
new Triangle(0, 1, 2)
};
var volumeData = new VolumeData2D();
volumeData.FromTriangulation(vertices, triangles);
}
/// <summary>
/// Writes 2D data to a file.
/// </summary>
/// <param name="path">Path of the file.</param>
/// <param name="volumeData">Data.</param>
public void Write(string path, VolumeData2D volumeData)
{
StreamWriter writer = new StreamWriter(path);
writer.WriteLine("# centroid.X" + separator + "centroid.Y" + separator + "triangleIndex" + separator + "voronoiIndex" + separator + "weight" + separator + "visited" + separator + "edgeIndices");
var edgeList = new List <Edge2D>();
foreach (var cell in volumeData.Cells)
{
writer.Write(cell.Centroid.X);
writer.Write(separator);
writer.Write(cell.Centroid.Y);
writer.Write(separator);
writer.Write(cell.TriangleIndex);
writer.Write(separator);
writer.Write(cell.VoronoiIndex);
writer.Write(separator);
writer.Write(cell.Weight);
writer.Write(separator);
writer.Write(cell.Visited);
for (int i = 0; i < cell.Edges.Count; i++)
{
writer.Write(separator);
writer.Write(edgeList.Count);
edgeList.Add(cell.Edges[i]);
}
writer.WriteLine();
}
writer.WriteLine("# normal.x" + separator + "normal.y" + separator + "c" + separator + "sourceIndex" + separator + "targetIndex");
foreach (var edge in edgeList)
{
writer.Write(edge.Normal.X);
writer.Write(separator);
writer.Write(edge.Normal.Y);
writer.Write(separator);
writer.Write(edge.C);
writer.Write(separator);
int sourceIndex = -1;
int targetIndex = -1;
for (int i = 0; i < volumeData.Cells.Count; i++)
{
if (volumeData.Cells[i] == edge.Source)
{
sourceIndex = i;
}
if (volumeData.Cells[i] == edge.Target)
{
targetIndex = i;
}
if (sourceIndex != -1 && targetIndex != -1)
{
break;
}
}
writer.Write(sourceIndex);
writer.Write(separator);
writer.Write(targetIndex);
writer.WriteLine();
}
writer.Close();
}
