/// <summary>
/// Create Top and Bottom of mesh
/// </summary>
/// <param name="pts"></param>
/// <param name="invert"></param>
/// <returns></returns>
protected ScanSlice CreateForTopBottom(Point3DList pts, bool invert = false)
{
int count = pts.Count;
if (count < 2)
{
return(new ScanSlice(pts));
}
ScanSlice outerList = new ScanSlice(count);
double x = 0;
double y = 0;
double z = 0;
for (int i = 0; i < count + 1; i++)
{
Point3D p = pts[i % count];
if (i == 0 || (pts[i - 1].Position - p.Position).LengthFast != 0)
{
outerList.Add(p);
if (i < count)
{
x += p.Position.X;
y += p.Position.Y;
z += p.Position.Z;
}
}
}
Vector3d center = new Vector3d((double)(x / count), (double)(y / count), (double)(z / count));
count = outerList.Count;
if (count < 2)
{
return(outerList);
}
ScanSlice ret = new ScanSlice(count * 2);
int idx = 0;
for (idx = 0; idx < count; idx++)
{
Point3D pt = outerList[idx];
if (invert)
{
ret.Add(new Point3D(center, pt.Normal, pt.Color));
}
ret.Add(pt);
if (!invert)
{
ret.Add(new Point3D(center, pt.Normal, pt.Color));
}
}
return(ret);
}
/// <summary>
/// Create a strip result for 2 Scanline (with same Nbr of Points)
/// </summary>
/// <param name="prev"></param>
/// <param name="current"></param>
public StripResult(ScanLine prev, ScanLine current)
{
if (prev.Count != current.Count)
throw new Exception(" previous and current pointlist doesn't have the same point count");
Previous = prev;
Current = current;
Result = new ScanSlice(Previous.Count + current.Count);
//GL.Begin(PrimitiveType.LineStrip);
int count = Math.Min(Previous.Count, current.Count);
for (int i = 0; i < count; i++)
{
Result.Add(Previous[i]);
Result.Add(current[i]);
}
AbstractMeshBuilder.AdjustNormalFromTriangleStrip(Result);
}
/// <summary>
/// Create a strip result for 2 Scanline (with same Nbr of Points)
/// </summary>
/// <param name="prev"></param>
/// <param name="current"></param>
public StripResult(ScanLine prev, ScanLine current)
{
if (prev.Count != current.Count)
{
throw new Exception(" previous and current pointlist doesn't have the same point count");
}
Previous = prev;
Current = current;
Result = new ScanSlice(Previous.Count + current.Count);
//GL.Begin(PrimitiveType.LineStrip);
int count = Math.Min(Previous.Count, current.Count);
for (int i = 0; i < count; i++)
{
Result.Add(Previous[i]);
Result.Add(current[i]);
}
AbstractMeshBuilder.AdjustNormalFromTriangleStrip(Result);
}
/// <summary>
/// Create Top and Bottom of mesh
/// </summary>
/// <param name="pts"></param>
/// <param name="invert"></param>
/// <returns></returns>
protected ScanSlice CreateForTopBottom(Point3DList pts, bool invert = false)
{
int count = pts.Count;
if (count < 2)
return new ScanSlice(pts);
ScanSlice outerList = new ScanSlice(count);
double x = 0;
double y = 0;
double z = 0;
for (int i = 0; i < count + 1; i++)
{
Point3D p = pts[i % count];
if (i == 0 || (pts[i - 1].Position - p.Position).LengthFast != 0)
{
outerList.Add(p);
if (i < count)
{
x += p.Position.X;
y += p.Position.Y;
z += p.Position.Z;
}
}
}
Vector3d center = new Vector3d((double)(x / count), (double)(y / count), (double)(z / count));
count = outerList.Count;
if (count < 2)
return outerList;
ScanSlice ret = new ScanSlice(count * 2);
int idx = 0;
for (idx = 0; idx < count; idx++)
{
Point3D pt = outerList[idx];
if (invert)
ret.Add(new Point3D(center, pt.Normal, pt.Color));
ret.Add(pt);
if (!invert)
ret.Add(new Point3D(center, pt.Normal, pt.Color));
}
return ret;
}
