internal void Draw(Box box)
{
System.Drawing.Graphics g = Graphics;
if (box is Pack)
{
Pack pack = box as Pack;
pack.Draw(this);
}
else
{
Vector3D[] points = box.Points;
Face[] faces = box.Faces;
for (int i = 0; i < 6; ++i)
{
// Face
Face face = faces[i];
// face normal
Vector3D normal = face.Normal;
// visible ?
if (!faces[i].IsVisible(_vTarget - _vCameraPos))
{
continue;
}
// color
faces[i].ColorFill = box.Colors[i];
double cosA = System.Math.Abs(Vector3D.DotProduct(faces[i].Normal, VLight));
Color color = Color.FromArgb((int)(faces[i].ColorFill.R * cosA), (int)(faces[i].ColorFill.G * cosA), (int)(faces[i].ColorFill.B * cosA));
// points
Vector3D[] points3D = faces[i].Points;
Point[] pt = TransformPoint(GetCurrentTransformation(), points3D);
// draw solid face
Brush brush = new SolidBrush(color);
g.FillPolygon(brush, pt);
// draw textures
if (null != face.Textures && ShowTextures)
{
foreach (Texture texture in face.Textures)
{
Point[] ptsImage = TransformPoint(GetCurrentTransformation(), box.PointsImage(i, texture));
Point[] pts = new Point[3];
pts[0] = ptsImage[3];
pts[1] = ptsImage[2];
pts[2] = ptsImage[0];
g.DrawImage(texture.Bitmap, pts);
}
}
// draw path
Brush brushPath = new SolidBrush(faces[i].ColorPath);
Pen penPathThick = new Pen(brushPath, box.IsBundle ? 2.0f : 1.5f);
int ptCount = pt.Length;
for (int j = 1; j < ptCount; ++j)
{
g.DrawLine(penPathThick, pt[j - 1], pt[j]);
}
g.DrawLine(penPathThick, pt[ptCount - 1], pt[0]);
// draw bundle lines
if (box.IsBundle && i < 4)
{
Pen penPathThin = new Pen(brushPath, 1.5f);
int noSlice = Math.Min(box.BundleFlats, 4);
for (int iSlice = 0; iSlice < noSlice - 1; ++iSlice)
{
Vector3D[] ptSlice = new Vector3D[2];
ptSlice[0] = points3D[0] + ((double)(iSlice + 1) / (double)noSlice) * (points3D[3] - points3D[0]);
ptSlice[1] = points3D[1] + ((double)(iSlice + 1) / (double)noSlice) * (points3D[2] - points3D[1]);
Point[] pt2D = TransformPoint(GetCurrentTransformation(), ptSlice);
g.DrawLine(penPathThin, pt2D[0], pt2D[1]);
}
}
}
// draw box tape
if (box.ShowTape && faces[5].IsVisible(_vTarget - _vCameraPos))
{
// get color
double cosA = System.Math.Abs(Vector3D.DotProduct(faces[5].Normal, VLight));
Color color = Color.FromArgb((int)(box.TapeColor.R * cosA), (int)(box.TapeColor.G * cosA), (int)(box.TapeColor.B * cosA));
// instantiate brush
Brush brushTape = new SolidBrush(color);
// get tape points
Point[] pts = TransformPoint(GetCurrentTransformation(), box.TapePoints);
// fill polygon
g.FillPolygon(brushTape, pts);
// draw path
Brush brushPath = new SolidBrush(faces[5].ColorPath);
Pen penPathThick = new Pen(brushPath, 1.5f);
int ptCount = pts.Length;
for (int j = 1; j < ptCount; ++j)
{
g.DrawLine(penPathThick, pts[j - 1], pts[j]);
}
g.DrawLine(penPathThick, pts[ptCount - 1], pts[0]);
}
}
if (_showBoxIds)
{
// draw box id
Point ptId = TransformPoint(GetCurrentTransformation(), box.TopFace.Center);
g.DrawString(
box.PickId.ToString()
, new Font("Arial", GridFontSize)
, Brushes.Black
, new Rectangle(ptId.X - 15, ptId.Y - 10, 30, 20)
, StringFormat.GenericDefault);
g.DrawString(
_boxDrawingCounter.ToString()
, new Font("Arial", GridFontSize)
, Brushes.Red
, new Rectangle(ptId.X + 5, ptId.Y - 10, 30, 20)
, StringFormat.GenericDefault);
}
++_boxDrawingCounter;
}
/// <summary>
/// add face
/// </summary>
/// <param name="face">Face item</param>
public void AddFace(Face face)
{
_faces.Add(face);
}
/// <summary>
/// Background faces
/// </summary>
/// <param name="face">Face to be drawn before other faces</param>
public void AddFaceBackground(Face face)
{
_facesBackground.Add(face);
}
private int Split(Face f, ref List <Face> f1, ref List <Face> f2)
{
int[] v = new int[4];
int val = 0;
int i = 0;
foreach (Vector3D pt in f.Points)
{
v[i] = TestPoint(pt);
val += v[i++];
}
switch (val)
{
case 4:
f1.Add(f);
return(1);
case -4:
f2.Add(f);
return(1);
case 2:
f1.Add(f);
return(1);
case -2:
f2.Add(f);
return(1);
case 0:
if (0 != v[0] && 0 != v[1] && 0 != v[2] && 0 != v[3])
{
for (i = 0; i < 4; ++i)
{
if (v[i % 4] + v[(i + 1) % 4] == 2)
{
Vector3D ptInter1 = Vector3D.Zero, ptInter2 = Vector3D.Zero;
TestLine(f.Points[(i + 1) % 4], f.Points[(i + 2) % 4], ref ptInter1);
TestLine(f.Points[(i + 3) % 4], f.Points[(i + 4) % 4], ref ptInter2);
Vector3D[] v1 = new Vector3D[4];
v1[0] = f.Points[i % 4];
v1[1] = f.Points[(i + 1) % 4];
v1[2] = ptInter1;
v1[3] = ptInter2;
f1.Add(new Face(f.PickingId, v1, f.ColorFill, f.ColorPath, f.IsSolid));
Vector3D[] v2 = new Vector3D[4];
v2[0] = ptInter2;
v2[1] = ptInter1;
v2[2] = f.Points[(i + 2) % 4];
v2[3] = f.Points[(i + 3) % 4];
f2.Add(new Face(f.PickingId, v2, f.ColorFill, f.ColorPath, f.IsSolid));
}
}
return(2);
}
else // triangle is inside plane, assign to positive node
{
f1.Add(f);
return(1);
}
default:
_log.WarnFormat("Split: val = {0}", val);
throw new GraphicsException("Split failed!");
}
}
// constructor
public BSPNode(Face f)
{
Face = f;
InitEquation(f, ref A, ref B, ref C, ref D);
}
/// <summary> /// add face /// </summary> /// <param name="face">Face item</param> public void AddFace(Face face) => Faces.Add(face);