// highlight the selection
public override void HighlightSelection(MeshGeometry3D meshGeometry, Color selectColor)
{
var nDotNo = GetDataNo();
if (nDotNo == 0)
{
return;
}
Point mapPt;
for (var i = 0; i < nDotNo; i++)
{
if (m_vertices[i].selected)
{
mapPt = TextureMapping.GetMappingPosition(selectColor, true);
}
else
{
mapPt = TextureMapping.GetMappingPosition(m_vertices[i].color, true);
}
var nMin = m_vertices[i].nMinI;
meshGeometry.TextureCoordinates[nMin] = mapPt;
}
}
// set this ModelVisual3D object from a array of mesh3D objects
private void SetModel(ArrayList meshs, Material backMaterial)
{
if (meshs == null)
{
return;
}
var nMeshNo = meshs.Count;
if (nMeshNo == 0)
{
return;
}
var triangleMesh = new MeshGeometry3D();
var nTotalVertNo = 0;
for (var j = 0; j < nMeshNo; j++)
{
var mesh = (Mesh3D)meshs[j];
var nVertNo = mesh.GetVertexNo();
var nTriNo = mesh.GetTriangleNo();
if ((nVertNo <= 0) || (nTriNo <= 0))
{
continue;
}
var vx = new double[nVertNo];
var vy = new double[nVertNo];
var vz = new double[nVertNo];
for (var i = 0; i < nVertNo; i++)
{
vx[i] = vy[i] = vz[i] = 0;
}
// get normal of each vertex
for (var i = 0; i < nTriNo; i++)
{
var tri = mesh.GetTriangle(i);
var vN = mesh.GetTriangleNormal(i);
var n0 = tri.n0;
var n1 = tri.n1;
var n2 = tri.n2;
vx[n0] += vN.X;
vy[n0] += vN.Y;
vz[n0] += vN.Z;
vx[n1] += vN.X;
vy[n1] += vN.Y;
vz[n1] += vN.Z;
vx[n2] += vN.X;
vy[n2] += vN.Y;
vz[n2] += vN.Z;
}
for (var i = 0; i < nVertNo; i++)
{
var length = Math.Sqrt(vx[i] * vx[i] + vy[i] * vy[i] + vz[i] * vz[i]);
if (length > 1e-20)
{
vx[i] /= length;
vy[i] /= length;
vz[i] /= length;
}
triangleMesh.Positions.Add(mesh.GetPoint(i));
var color = mesh.GetColor(i);
var mapPt = m_mapping.GetMappingPosition(color);
if (color == Colors.Transparent)
{
mapPt = TextureMapping.GetMappingPosition(color, false);
}
//Point mapPt = TextureMapping.GetMappingPosition(color,true);
triangleMesh.TextureCoordinates.Add(new Point(mapPt.X, mapPt.Y));
triangleMesh.Normals.Add(new Vector3D(vx[i], vy[i], vz[i]));
}
for (var i = 0; i < nTriNo; i++)
{
var tri = mesh.GetTriangle(i);
var n0 = tri.n0;
var n1 = tri.n1;
var n2 = tri.n2;
triangleMesh.TriangleIndices.Add(nTotalVertNo + n0);
triangleMesh.TriangleIndices.Add(nTotalVertNo + n1);
triangleMesh.TriangleIndices.Add(nTotalVertNo + n2);
}
nTotalVertNo += nVertNo;
}
//Material material = new DiffuseMaterial(new SolidColorBrush(Colors.Red));
Material material = m_mapping.m_material;
var triangleModel = new GeometryModel3D(triangleMesh, material);
triangleModel.Transform = new Transform3DGroup();
if (backMaterial != null)
{
triangleModel.BackMaterial = backMaterial;
}
Content = triangleModel;
}