/**
* Given a face and a point, this will add a vertex to the pb_Object and retriangulate the face.
*/
public static bool AppendVerticesToFace(this pb_Object pb, pb_Face face, List <Vector3> points, out pb_Face newFace)
{
if (!face.isValid())
{
newFace = face;
return(false);
}
// First order of business - project face to 2d
int[] distinctIndices = face.distinctIndices;
Vector3[] verts = pb.GetVertices(distinctIndices);
// Get the face normal before modifying the vertex array
Vector3 nrm = pb_Math.Normal(pb.GetVertices(face.indices));
Vector3 projAxis = pb_Math.GetProjectionAxis(nrm).ToVector3();
// Add the new point
Vector3[] t_verts = new Vector3[verts.Length + points.Count];
System.Array.Copy(verts, 0, t_verts, 0, verts.Length);
System.Array.Copy(points.ToArray(), 0, t_verts, verts.Length, points.Count);
verts = t_verts;
// Project
List <Vector2> plane = new List <Vector2>(pb_Math.VerticesTo2DPoints(verts, projAxis));
// Save the sharedIndices index for each distinct vertex
pb_IntArray[] sharedIndices = pb.sharedIndices;
int[] sharedIndex = new int[distinctIndices.Length + points.Count];
for (int i = 0; i < distinctIndices.Length; i++)
{
sharedIndex[i] = sharedIndices.IndexOf(distinctIndices[i]);
}
for (int i = distinctIndices.Length; i < distinctIndices.Length + points.Count; i++)
{
sharedIndex[i] = -1; // add the new vertex to it's own sharedIndex
}
// Triangulate the face with the new point appended
int[] tris = Delauney.Triangulate(plane).ToIntArray();
// Check to make sure the triangulated face is facing the same direction, and flip if not
Vector3 del = Vector3.Cross(verts[tris[2]] - verts[tris[0]], verts[tris[1]] - verts[tris[0]]).normalized;
if (Vector3.Dot(nrm, del) > 0)
{
System.Array.Reverse(tris);
}
// Compose new face
newFace = pb.AppendFace(verts, new pb_Face(tris, face.material, new pb_UV(face.uv), face.smoothingGroup, face.textureGroup, -1, face.color), sharedIndex);
// And delete the old
pb.DeleteFace(face);
return(true);
}
/**
* Given a face and a point, this will add a vertex to the pb_Object and retriangulate the face.
*/
public static bool AppendVerticesToFace(this pb_Object pb, pb_Face face, Vector3[] points, Color[] addColors, out pb_Face newFace)
{
if (!face.IsValid())
{
newFace = face;
return(false);
}
// First order of business - project face to 2d
int[] distinctIndices = face.distinctIndices;
Vector3[] verts = pb.GetVertices(distinctIndices);
Color[] cols = pbUtil.ValuesWithIndices(pb.colors, distinctIndices);
Vector2[] uvs = new Vector2[distinctIndices.Length + points.Length];
System.Array.Copy(pb.GetUVs(distinctIndices), 0, uvs, 0, distinctIndices.Length);
// Add the new point
Vector3[] t_verts = new Vector3[verts.Length + points.Length];
System.Array.Copy(verts, 0, t_verts, 0, verts.Length);
System.Array.Copy(points, 0, t_verts, verts.Length, points.Length);
verts = t_verts;
// Add the new color
Color[] t_col = new Color[cols.Length + addColors.Length];
System.Array.Copy(cols, 0, t_col, 0, cols.Length);
System.Array.Copy(addColors, 0, t_col, cols.Length, addColors.Length);
cols = t_col;
// Get the face normal before modifying the vertex array
Vector3 nrm = pb_Math.Normal(pb.GetVertices(face.indices));
Vector3 projAxis = pb_Math.ProjectionAxisToVector(pb_Math.VectorToProjectionAxis(nrm));
// Project
List <Vector2> plane = new List <Vector2>(pb_Math.PlanarProject(verts, projAxis));
// Save the sharedIndices index for each distinct vertex
pb_IntArray[] sharedIndices = pb.sharedIndices;
int[] sharedIndex = new int[distinctIndices.Length + points.Length];
for (int i = 0; i < distinctIndices.Length; i++)
{
sharedIndex[i] = sharedIndices.IndexOf(distinctIndices[i]);
}
for (int i = distinctIndices.Length; i < distinctIndices.Length + points.Length; i++)
{
sharedIndex[i] = -1; // add the new vertex to it's own sharedIndex
}
// Triangulate the face with the new point appended
int[] tris = Delaunay.Triangulate(plane).ToIntArray();
// Check to make sure the triangulated face is facing the same direction, and flip if not
Vector3 del = Vector3.Cross(verts[tris[2]] - verts[tris[0]], verts[tris[1]] - verts[tris[0]]).normalized;
if (Vector3.Dot(nrm, del) > 0)
{
System.Array.Reverse(tris);
}
// Build the new face
pb_Face triangulated_face = new pb_Face(tris, face.material, new pb_UV(face.uv), face.smoothingGroup, face.textureGroup, -1, face.manualUV);
/**
* Attempt to figure out where the new UV point(s) should go (if auto uv'ed face)
*/
if (triangulated_face.manualUV)
{
for (int n = distinctIndices.Length; n < uvs.Length; n++)
{
// these are the two vertices that are split by the new vertex
int[] adjacent_vertex = System.Array.FindAll(triangulated_face.edges, x => x.Contains(n)).Select(x => x.x != n ? x.x : x.y).ToArray();
if (adjacent_vertex.Length == 2)
{
uvs[n] = (uvs[adjacent_vertex[0]] + uvs[adjacent_vertex[1]]) / 2f;
}
else
{
Debug.LogWarning("Failed to find appropriate UV coordinate for new vertex point. Setting face to AutoUV.");
triangulated_face.manualUV = false;
}
}
}
// Compose new face
newFace = pb.AppendFace(verts, cols, uvs, triangulated_face, sharedIndex);
// And delete the old
pb.DeleteFace(face);
return(true);
}
