//todo: FINISH THIS TEST
public void CreateLineFromFacetAtZIndex_CreatesAccurateLine()
{
var l1 = new SliceLine
{
Points = new List <SlicePoint>
{
new SlicePoint(2, 2),
new SlicePoint(-2, -2)
},
Normal = new SlicePoint(-1, 1)
};
var f1 = new Facet
{
Vertices = new List <Vertex>
{
new Vertex {
X = 0, Y = 0, Z = 0
},
new Vertex {
X = 5, Y = 5, Z = 5
},
new Vertex {
X = -5, Y = -5, Z = 5
}
},
Normal = new Normal {
X = 1, Y = -1, Z = 0
}
};
var fN = f1.Normal;
}
public static SliceLine CreateLineFromFacetAtZIndex(Facet facet, float z)
{
// This won't work for flat horizontal plane vertices, so throw if that's what we've got
if (Math.Abs(facet.Normal.Z) == 1)
{
throw new Exception("Cannot create lines for flat horizontal planes");
}
var verts = facet.Vertices;
var returnLine = new SliceLine();
// If any vertices are ON the z-index, just return that line
returnLine.Points.AddRange(verts.Where(v => v.Z == z).Select(v => new SlicePoint(v.X, v.Y)));
// For uniformity, I'm representing a point as a "line" between two of the same point
// It's janky, I'll refactor later
if (returnLine.Points.Count == 1)
{
returnLine.Points.Add(returnLine.Points[0]);
}
if (returnLine.Points.Count == 2)
{
returnLine.Normal = new SlicePoint(facet.Normal.X, facet.Normal.Y);
return(returnLine);
}
// If no vertices are ON the z-index, find the two points where they CROSS it
if ((verts[0].Z - z) / (verts[1].Z - z) < 0)
{
returnLine.Points.Add(CalculateZIntercept(verts[0], verts[1], z));
}
if ((verts[2].Z - z) / (verts[1].Z - z) < 0)
{
returnLine.Points.Add(CalculateZIntercept(verts[2], verts[1], z));
}
if (returnLine.Points.Count < 2)
{
returnLine.Points.Add(CalculateZIntercept(verts[0], verts[2], z));
}
returnLine.Normal = new SlicePoint(facet.Normal.X, facet.Normal.Y);
if (!returnLine.Validate())
{
throw new InvalidOperationException("Invalid Point Data");
}
return(returnLine);
}
private void FindSelfCollisions()
{
for (var i = 0; i < Lines.Count; i++)
{
var line1 = Lines[i];
for (var j = i + 1; j < Lines.Count; j++)
{
var line2 = Lines[j];
Vector2 point;
if (CollisionSegments(line1, line2, out point))
{
Lines.Add(new Line2d
{
Point0 = point,
Point1 = line1.Point1
});
line1.Point1 = point;
Lines.Add(new Line2d
{
Point0 = point,
Point1 = line2.Point1
});
line2.Point1 = point;
}
}
}
var tmpIndices = new List <int>();
slicePointsDictionary.Clear();
foreach (var line in Lines)
{
line.UpdateDirection();
for (var i = 0; i < 2; i++)
{
if (line.Point0[i] < line.Point1[i])
{
line.A[i] = line.Point0[i];
line.B[i] = line.Point1[i];
}
else
{
line.A[i] = line.Point1[i];
line.B[i] = line.Point0[i];
}
}
tmpIndices.Clear();
for (var i = 0; i < 2; i++)
{
var point = i == 0 ? line.Point0 : line.Point1;
var index = slicePoints.Count;
if (!slicePointsDictionary.TryGetValue(point, out index))
{
index = slicePoints.Count;
slicePoints.Add(new SlicePoint
{
Coordinate = point
});
slicePointsDictionary.Add(point, index);
}
tmpIndices.Add(index);
}
var sliceLine = new SliceLine
{
Point0 = slicePoints[tmpIndices[0]],
Point1 = slicePoints[tmpIndices[1]],
Line = line
};
sliceLine.Point0.Lines.Add(sliceLine);
sliceLine.Point1.Lines.Add(sliceLine);
sliceLines.Add(sliceLine);
}
}
private void FindSelfCollisions()
{
for (var i = 0; i < Lines.Count; i++)
{
var line1 = Lines[i];
for (var j = i + 1; j < Lines.Count; j++)
{
var line2 = Lines[j];
Vector2 point;
if (CollisionSegments(line1, line2, out point))
{
Lines.Add(new Line2d
{
Point0 = point,
Point1 = line1.Point1
});
line1.Point1 = point;
Lines.Add(new Line2d
{
Point0 = point,
Point1 = line2.Point1
});
line2.Point1 = point;
}
}
}
var tmpIndices = new List<int>();
slicePointsDictionary.Clear();
foreach (var line in Lines)
{
line.UpdateDirection();
for (var i = 0; i < 2; i++)
{
if (line.Point0[i] < line.Point1[i])
{
line.A[i] = line.Point0[i];
line.B[i] = line.Point1[i];
}
else
{
line.A[i] = line.Point1[i];
line.B[i] = line.Point0[i];
}
}
tmpIndices.Clear();
for (var i = 0; i < 2; i++)
{
var point = i == 0 ? line.Point0 : line.Point1;
var index = slicePoints.Count;
if (!slicePointsDictionary.TryGetValue(point, out index))
{
index = slicePoints.Count;
slicePoints.Add(new SlicePoint
{
Coordinate = point
});
slicePointsDictionary.Add(point, index);
}
tmpIndices.Add(index);
}
var sliceLine = new SliceLine
{
Point0 = slicePoints[tmpIndices[0]],
Point1 = slicePoints[tmpIndices[1]],
Line = line
};
sliceLine.Point0.Lines.Add(sliceLine);
sliceLine.Point1.Lines.Add(sliceLine);
sliceLines.Add(sliceLine);
}
}
