private static bool _HitTestTriangleFansResult(IHitTestSource model, DataPair pair, Point3F[] points, LazyArray <Point3F, Point3F> pointsTransformed, List <HitResult> results, PointF pointInWpf)
{
var flag = false;
var index1 = pair.Start;
var p1 = points[index1];
var pt1 = pointsTransformed[index1];
for (int i = 2; i < pair.Count; i++)
{
var index2 = i - 1 + pair.Start;
var index3 = i + pair.Start;
var p2 = points[index2];
var p3 = points[index3];
var pt2 = pointsTransformed[index2];
var pt3 = pointsTransformed[index3];
var triangle = new Triangle((PointF)pt1, (PointF)pt2, (PointF)pt3);
float a, b;
triangle.CalcBarycentric(pointInWpf, out a, out b);
if (a >= 0 && b >= 0 && a + b <= 1)
{
var c = 1 - a - b;
var z = pt1.Z * a + pt2.Z * b + pt3.Z * c;
results.Add(new HitResult(new TriangleMesh(p1, p2, p3, model.GetIndex(index1), model.GetIndex(index2), model.GetIndex(index3), a, b, c), model, z));
flag = true;
}
}
return(flag);
}
private static bool _HitTestLinesResult(IHitTestSource model, DataPair pair, Point3F[] points, LazyArray <Point3F, Point3F> pointsTransformed, List <HitResult> results, PointF pointInWpf, float sensity)
{
var flag = false;
var cond = pair.Count - 1;
var stride = model.Mode == GLPrimitiveMode.GL_LINES ? 2 : 1;
var limit = model.Mode == GLPrimitiveMode.GL_LINE_LOOP ? pair.Count : pair.Count - 1;
for (int i = 0; i < limit; i += stride)
{
var index1 = i + pair.Start;
var index2 = i + 1 + pair.Start;
if (i == cond)
{
index2 = 0;
}
var p1 = points[index1];
var p2 = points[index2];
var pt1 = pointsTransformed[index1];
var pt2 = pointsTransformed[index2];
var line = new Line((PointF)pt1, (PointF)pt2);
var cp = _LineHitTest(pointInWpf, line, sensity);
if (cp.HasValue)
{
var p = cp.Value;
var t = line.CalcT(p);
GeometryHelper.Clamp(ref t, 0, 1);
var z = t * pt1.Z + (1 - t) * pt2.Z;
results.Add(new HitResult(new LineMesh(p1, p2, model.GetIndex(index1), model.GetIndex(index2), t, 1 - t), model, z));
flag = true;
}
}
return(flag);
}
