/// <summary>
/// constructs a mesh from the passed array of 3d points
/// points must be in column-major format
/// </summary>
/// <param name="verts">a grid of 3d points to mesh</param>
/// <param name="rows">the number of rows in the grid</param>
/// <returns>a ColorPlain mesh object colored by layer</returns>
public static Mesh GetMesh(Point3D[] verts, int rows)
{
int cols = verts.Length / rows;
Mesh mesh = new Mesh(meshNatureType.ColorSmooth);
mesh.Vertices = verts;
mesh.Triangles = new SmoothTriangle[(rows - 1) * (cols - 1) * 2];
int count = 0;
for (int j = 0; j < (rows - 1); j++)
{
for (int i = 0; i < (cols - 1); i++)
{
mesh.Triangles[count++] = new SmoothTriangle(i + j * cols,
i + j * cols + 1,
i + (j + 1) * cols + 1);
mesh.Triangles[count++] = new SmoothTriangle(i + j * cols,
i + (j + 1) * cols + 1,
i + (j + 1) * cols);
}
}
mesh.RegenMode = regenType.RegenAndCompile;
mesh.ComputeEdges();
//mesh.ComputeNormals();
mesh.NormalAveragingMode = meshNormalAveragingType.AveragedByAngle;
return mesh;
}
public static void UpdateMesh(Mesh target, Mesh source)
{
target.Vertices = source.Vertices;
target.Triangles = source.Triangles.ToArray();
//int count = 0;
//for (int j = 0; j < (rows - 1); j++)
//{
// for (int i = 0; i < (cols - 1); i++)
// {
// mesh.Triangles[count++] = new IndexTriangle(i + j * cols,
// i + j * cols + 1,
// i + (j + 1) * cols + 1);
// mesh.Triangles[count++] = new IndexTriangle(i + j * cols,
// i + (j + 1) * cols + 1,
// i + (j + 1) * cols);
// }
//}
target.RegenMode = regenType.RegenAndCompile;
target.ComputeEdges();
//mesh.ComputeNormals();
target.NormalAveragingMode = meshNormalAveragingType.AveragedByAngle;
}
//static public Point3D[] GetMeshGaussianPoints(ISurface s, int ROWS, int COLS, out double[] gauss)
//{
// Vect2 uv = new Vect2();
// Vect3 xyz = new Vect3();
// gauss = new double[ROWS * COLS];
// Point3D[] d = new Point3D[ROWS * COLS];
// int i = 0;
// for (int iU = 0; iU < ROWS; iU++)
// {
// uv[0] = (double)iU / (double)(ROWS - 1);
// for (int iV = 0; iV < COLS; iV++, i++)
// {
// uv[1] = (double)iV / (double)(COLS - 1);
// s.xRad(uv, ref xyz, ref gauss[i]);
// Utilities.Vect3ToPoint3D(ref d[i], xyz);
// }
// }
// return d;
//}
/// <summary>
/// constructs a mesh representation of a surface using MESHROWS and MESHCOLS for resoultion
/// </summary>
/// <param name="s">the surface to mesh</param>
/// <param name="uvLims">(optional)the uv limits to mesh, uvLim[0,x] = uLim, uvLim[1,x] = vLim</param>
/// <param name="bGauss">true for gaussian colormap, false for by-layer coloring</param>
/// <returns>a mesh of either MulticolorPlain or ColorPlain type</returns>
public static Mesh GetMesh(ISurface s, double[,] uvLims, bool bGauss)
{
int rows = MESHU, cols = MESHV;
//Mesh mesh = new Mesh(meshNatureType.RichPlain);
meshNatureType meshtype = bGauss ? meshNatureType.MulticolorSmooth : meshNatureType.ColorSmooth;
Mesh mesh = new Mesh(meshtype);
mesh.ColorMethod = bGauss ? colorMethodType.byEntity : colorMethodType.byLayer;
mesh.Vertices = bGauss ? SurfaceTools.GetMeshGaussianPoints(s, rows, cols, uvLims) : SurfaceTools.GetExtensionPoints(s, rows, cols, uvLims);
mesh.RegenMode = regenType.RegenAndCompile;
mesh.Triangles = new SmoothTriangle[(rows - 1) * (cols - 1) * 2];
int count = 0;
for (int j = 0; j < (rows - 1); j++)
{
for (int i = 0; i < (cols - 1); i++)
{
mesh.Triangles[count++] = new SmoothTriangle(i + j * cols,
i + j * cols + 1,
i + (j + 1) * cols + 1);
mesh.Triangles[count++] = new SmoothTriangle(i + j * cols,
i + (j + 1) * cols + 1,
i + (j + 1) * cols);
}
}
mesh.ComputeEdges();
//mesh.ComputeNormals();
mesh.NormalAveragingMode = meshNormalAveragingType.AveragedByAngle;
mesh.EntityData = s;
mesh.Selectable = false;
return mesh;
}