protected override void update_vertices(FScene s)
{
if (Target.Timestamp == target_timestamp)
{
return;
}
target_timestamp = Target.Timestamp;
DMesh3 Mesh = Target.Mesh;
for (int i = 0; i < VertexCount; ++i)
{
SurfaceVertexRef r = SurfacePoints[i];
Vector3d vSum = Vector3d.Zero;
Frame3f f = Mesh.GetTriFrame(r.tid);
Index3i tv = Mesh.GetTriangle(r.tid);
for (int j = 0; j < 3; ++j)
{
f.Origin = (Vector3f)Mesh.GetVertex(tv[j]);
Vector3d v = f.FromFrameP(r.offsets[j]);
vSum += v;
}
vSum /= 3;
this[i] = SceneTransforms.ObjectToSceneP(Target, vSum);
}
}
public override void AppendVertex(Vector3d v)
{
base.AppendVertex(v);
// map v to mesh
v = SceneTransforms.SceneToObjectP(Target, v);
// TODO encode vertices by normals ??
DMesh3 Mesh = Target.Mesh;
DMeshAABBTree3 Spatial = Target.Spatial;
SurfaceVertexRef r = new SurfaceVertexRef();
r.tid = Spatial.FindNearestTriangle(v);
Frame3f f = Mesh.GetTriFrame(r.tid);
Index3i tv = Mesh.GetTriangle(r.tid);
for (int j = 0; j < 3; ++j)
{
f.Origin = (Vector3f)Mesh.GetVertex(tv[j]);
Vector3d dv = f.ToFrameP(v);
r.offsets[j] = dv;
}
SurfacePoints.Add(r);
if (Curve.VertexCount != SurfacePoints.Count)
{
throw new Exception("SurfaceCurvePreview: counts are out of sync!!");
}
}