protected override void CreateDirectionalSurfaceSampling(
Func <Point3D, Point3D, double> estimateScreenDistanceWithoutClip,
Func <int, int, Tuple <int, int> > mapping,
int subdivisions,
List <Vertex> vertices,
List <IndexedLine> lines
)
{
if (vertices.Count > 0)
{
return;
}
var builder = new WireframeBuilder();
var surfaceSampler = new SurfaceConstantParameterLinesBuilder(
builder
);
var bezierPatch = new BernsteinPatch();
for (var i = 0; i < 16; ++i)
{
bezierPatch.ControlPoints[i / 4, i % 4] = ControlPoints[i].Position;
}
surfaceSampler.Build(bezierPatch);
vertices.AddRange(builder.Vertices.ToList());
lines.AddRange(builder.Lines.ToList());
}
public BernsteinPatch GetBernsteinPatch()
{
if (_segmentsU > 1 || _segmentsV > 1)
{
throw new ArgumentException(
"There exists more than one bernstein patch here"
);
}
var bezierPatch = new BernsteinPatch();
for (var i = 0; i < 16; ++i)
{
bezierPatch.ControlPoints[i / 4, i % 4] =
_virtualPoints[i].Position;
}
return(bezierPatch);
}
private BernsteinPatch GetPatchByLocation(int uPatchNum, int vPatchNum)
{
var patchControlPoints = BezierPatchGroup.GetList2DSubRectCyclic(
ControlPoints,
3 * SegmentsU + 1,
3 * uPatchNum,
3 * vPatchNum,
4,
4
);
var bezierPatch = new BernsteinPatch();
for (var i = 0; i < 16; ++i)
{
bezierPatch.ControlPoints[i / 4, i % 4] = patchControlPoints[i];
}
return(bezierPatch);
}
