public IcosphereBuilder(IcosphereBuilder source)
{
_vertices.AddRange(source._vertices);
var midPoints = new MidpointTable(_vertices);
foreach (var t in source._triangles)
{
var m1 = midPoints.GetMidpoint(t.i1, t.i2);
var m2 = midPoints.GetMidpoint(t.i2, t.i3);
var m3 = midPoints.GetMidpoint(t.i3, t.i1);
_triangles.Add((t.i1, m1, m3));
_triangles.Add((m1, t.i2, m2));
_triangles.Add((m3, m2, t.i3));
_triangles.Add((m1, m2, m3));
}
}
public void Subdivide()
{
var vc = new VertexCache();
vc.vertices.AddRange(vertexCache.vertices);
var midPoints = new MidpointTable(vc);
foreach (var t in vertexCache.triangles) {
var m1 = midPoints.GetMidpoint(t.i1, t.i2);
var m2 = midPoints.GetMidpoint(t.i2, t.i3);
var m3 = midPoints.GetMidpoint(t.i3, t.i1);
vc.AddTriangle(t.i1, m1, m3);
vc.AddTriangle(m1, t.i2, m2);
vc.AddTriangle(m3, m2, t.i3);
vc.AddTriangle(m1, m2, m3);
}
vertexCache = vc;
}
public void Subdivide()
{
var vc = new VertexCache();
vc.vertices.AddRange(vertexCache.vertices);
var midPoints = new MidpointTable(vc);
foreach (var t in vertexCache.triangles)
{
var m1 = midPoints.GetMidpoint(t.i1, t.i2);
var m2 = midPoints.GetMidpoint(t.i2, t.i3);
var m3 = midPoints.GetMidpoint(t.i3, t.i1);
vc.AddTriangle(t.i1, m1, m3);
vc.AddTriangle(m1, t.i2, m2);
vc.AddTriangle(m3, m2, t.i3);
vc.AddTriangle(m1, m2, m3);
}
vertexCache = vc;
}
