/// <remarks>v0 is connected to v1 and v1 is connected to v2</remarks>
private void AddFaceFrom(List <PolygonFace> faces, PolygonVertex v0, PolygonVertex v1, PolygonVertex v2)
{
//search face
foreach (var face in faces)
{
if (face.Contains(v0) && face.Contains(v1) && face.Contains(v2))
{
return;
}
}
var normal = GetVertexNormal(v0, v1, v2);
for (int i = 0; i < 3; i++)
{
var v3 = v2.Edges[i];
if (v3 == v1)
{
continue; // don't walk back
}
var normal2 = GetVertexNormal(v1, v2, v3);
var dot = Vector3.Dot(normal, normal2);
if (dot < 0.85f)
{
continue;
}
for (int k = 0; k < 3; k++)
{
var v4 = v3.Edges[k];
if (v4 == v2)
{
continue; // don't walk back
}
var normal3 = GetVertexNormal(v2, v3, v4);
dot = Vector3.Dot(normal, normal3);
if (dot < 0.85f)
{
continue;
}
for (int j = 0; j < 3; j++)
{
if (v0 == v4.Edges[j])
{
var face = new PolygonFace(normal);
face.Vertices.Add(v0);
face.Vertices.Add(v1);
face.Vertices.Add(v2);
face.Vertices.Add(v3);
face.Vertices.Add(v4);
faces.Add(face);
}
}
}
}
return;
}
private void AddFace(PolygonFace face)
{
int i0 = this.CurrentVertex;
Vector3 v0 = face.Vertices[0].Position;
Vector3 normal = face.Normal;
if (Vector3.Dot(v0, normal) < 0)
{
AddVertex(face.Vertices[4].Position, -face.Normal);
AddVertex(face.Vertices[3].Position, -face.Normal);
AddVertex(face.Vertices[2].Position, -face.Normal);
AddVertex(face.Vertices[1].Position, -face.Normal);
AddVertex(face.Vertices[0].Position, -face.Normal);
}
else
{
AddVertex(face.Vertices[0].Position, face.Normal);
AddVertex(face.Vertices[1].Position, face.Normal);
AddVertex(face.Vertices[2].Position, face.Normal);
AddVertex(face.Vertices[3].Position, face.Normal);
AddVertex(face.Vertices[4].Position, face.Normal);
}
var ia = i0 + 1;
for(int i=2;i<face.Vertices.Count;i++)
{
int ib = ia + 1;
AddIndex(i0);
AddIndex(ia);
AddIndex(ib);
ia = ib;
}
}
private void AddFace(PolygonFace face)
{
int i0 = this.CurrentVertex;
Vector3 v0 = face.Vertices[0].Position;
Vector3 normal = face.Normal;
if (Vector3.Dot(v0, normal) < 0)
{
AddVertex(face.Vertices[4].Position, -face.Normal);
AddVertex(face.Vertices[3].Position, -face.Normal);
AddVertex(face.Vertices[2].Position, -face.Normal);
AddVertex(face.Vertices[1].Position, -face.Normal);
AddVertex(face.Vertices[0].Position, -face.Normal);
}
else
{
AddVertex(face.Vertices[0].Position, face.Normal);
AddVertex(face.Vertices[1].Position, face.Normal);
AddVertex(face.Vertices[2].Position, face.Normal);
AddVertex(face.Vertices[3].Position, face.Normal);
AddVertex(face.Vertices[4].Position, face.Normal);
}
var ia = i0 + 1;
for (int i = 2; i < face.Vertices.Count; i++)
{
int ib = ia + 1;
AddIndex(i0);
AddIndex(ia);
AddIndex(ib);
ia = ib;
}
}
public static void PolygonMode(PolygonFace face, PolygonMode mode)
{
Delegates.glPolygonMode(face, mode);
}
public static extern void glPolygonMode(PolygonFace face, PolygonMode mode);
/// <remarks>v0 is connected to v1 and v1 is connected to v2</remarks>
private void AddFaceFrom(List<PolygonFace> faces, PolygonVertex v0, PolygonVertex v1, PolygonVertex v2)
{
//search face
foreach (var face in faces)
{
if (face.Contains(v0) && face.Contains(v1) && face.Contains(v2))
return;
}
var normal = GetVertexNormal(v0, v1, v2);
for (int i = 0; i < 3; i++)
{
var v3 = v2.Edges[i];
if (v3 == v1) continue; // don't walk back
var normal2 = GetVertexNormal(v1, v2, v3);
var dot = Vector3.Dot(normal, normal2);
if (dot < 0.85f) continue;
for (int k = 0; k < 3; k++)
{
var v4 = v3.Edges[k];
if (v4 == v2) continue; // don't walk back
var normal3 = GetVertexNormal(v2, v3, v4);
dot = Vector3.Dot(normal, normal3);
if (dot < 0.85f) continue;
for (int j = 0; j < 3; j++)
{
if (v0 == v4.Edges[j])
{
var face = new PolygonFace(normal);
face.Vertices.Add(v0);
face.Vertices.Add(v1);
face.Vertices.Add(v2);
face.Vertices.Add(v3);
face.Vertices.Add(v4);
faces.Add(face);
}
}
}
}
return;
}