/// <summary>
/// Can build side: Input1: Block at side, Input2: Base block
/// </summary>
public static List<CustomBlockData> GenerateModel(List<BoundingBox> boxes, BlockSource source, Point3 blockPos, bool removeCoveredFaces, IGeometryGeneratorSource i)
{
BlockData currentBlock = source.GetData(blockPos);
Vector3[] norms = new Vector3[] { new Vector3(1, 0, 0), new Vector3(-1, 0, 0), new Vector3(0, 1, 0), new Vector3(0, -1, 0), new Vector3(0, 0, 1), new Vector3(0, 0, -1) };
Dictionary<Vector3, Dictionary<float, List<Face>>> faces = new Dictionary<Vector3, Dictionary<float, List<Face>>>();
//Vector3 key: normal
//float key: value of normal component
//Foreach bounding box
foreach (BoundingBox bb in boxes)
{
//Foreach normal (Minecraft normals)
foreach (Vector3 normal in norms)
{
//Get the face for the normal
Face face = GetFace(bb, normal);
face.TextureTag = bb.TextureTag;
//Store it using the important Normal component
float val = face.GetNormalValue();
if (float.IsNaN(val))
continue;
Dictionary<float, List<Face>> dict;
if (faces.ContainsKey(normal))
{
dict = faces[normal];
}
else
{
dict = new Dictionary<float, List<Face>>();
faces.Add(normal, dict);
}
if (dict.ContainsKey(val))
dict[val].Add(face);
else
dict.Add(val, new List<Face>() { face });
}
}
List<CustomBlockData> datas = new List<CustomBlockData>();
//Foreach normal
foreach (KeyValuePair<Vector3, Dictionary<float, List<Face>>> pair in faces)
{
//Foreach normal component
foreach (KeyValuePair<float, List<Face>> pair2 in pair.Value)
{
//Check if we should build the side
if(pair2.Key == 0 && (pair.Key.X == -1 || pair.Key.Y == -1 || pair.Key.Z == -1)) //- sides
{
Point3 dir3 = pair.Key.ToPoint3();
Point3 atSide = blockPos + dir3;
BlockData atSideBlock = source.GetData(atSide);
if (!i.CanBuildSide(currentBlock, atSideBlock, blockPos, atSide))
{
continue;
}
}
if (pair2.Key == 1 && (pair.Key.X == 1 || pair.Key.Y == 1 || pair.Key.Z == 1)) //+ sides
{
Point3 dir3 = pair.Key.ToPoint3();
Point3 atSide = blockPos + dir3;
BlockData atSideBlock = source.GetData(atSide);
if (!i.CanBuildSide(currentBlock, atSideBlock, blockPos, atSide))
{
continue;
}
}
//pair2.Value contains the faces of the current Normal and Normal component value
//Let's calculate what we can see:
GpcPolygon polygon = new GpcPolygon();
foreach(Face face in pair2.Value)
{
GpcPolygon addPoly = new GpcPolygon();
addPoly.AddContour(new GpcVertexList(face.ConvertToPointList()), false);
polygon = polygon.Clip(GpcOperation.Union, addPoly);
}
//Remove the invisible parts
Vector3 inverseNormal = -pair.Key;
if (faces.ContainsKey(inverseNormal) && removeCoveredFaces)
{
if (faces[inverseNormal].ContainsKey(pair2.Key)) //There are faces, which make this face invisible
{
GpcPolygon invisible = new GpcPolygon();
foreach (Face face2 in faces[inverseNormal][pair2.Key])
{
GpcPolygon addPoly = new GpcPolygon();
addPoly.AddContour(new GpcVertexList(face2.ConvertToPointList()), false);
invisible = invisible.Clip(GpcOperation.Union, addPoly);
}
polygon = polygon.Clip(GpcOperation.Difference, invisible); //Remove the invisible parts
}
}
//Create the face
if (polygon.NofContours == 0)
continue;
foreach (GpcVertexList polys in polygon.Contour)
{
List<PolygonPoint> points = new List<PolygonPoint>();
foreach (GpcVertex vert in polys.Vertex)
{
points.Add(new PolygonPoint(vert.X, vert.Y));
}
Polygon triangulatorPoly = new Polygon(points);
//MAGIC :D
Triangulator.Triangulate(triangulatorPoly);
foreach (DelaunayTriangle tri in triangulatorPoly.Triangles)
{
CustomBlockData bd = new CustomBlockData();
bd.IsOneTriangle = true;
bd.Texture = i.GetTexture(pair2.Value[0]);
bd.Vertex1 = ConvertToVertexPosition(tri.Points[0], pair.Key, pair2.Key);
bd.Vertex2 = ConvertToVertexPosition(tri.Points[1], pair.Key, pair2.Key);
bd.Vertex3 = ConvertToVertexPosition(tri.Points[2], pair.Key, pair2.Key);
Vector2[] uvs = new Vector2[]{
new Vector2(tri.Points[0].Xf, tri.Points[0].Yf),
new Vector2(tri.Points[1].Xf, tri.Points[1].Yf),
new Vector2(tri.Points[2].Xf, tri.Points[2].Yf)
};
uvs = i.GetUVsForTriangle(uvs, pair2.Value[0]);
bd.UV1 = uvs[0];
bd.UV2 = uvs[1];
bd.UV3 = uvs[2];
bd.Normal = pair.Key;
datas.Add(bd);
}
}
}
}
return datas;
}
private void WriteCustomData(CustomBlockData range, ref Dictionary<string, DataSet> datas)
{
DataSet foundSet = null;
if (datas.ContainsKey(range.Texture))
foundSet = datas[range.Texture];
else
{
foundSet = new DataSet();
foundSet.BaseData = range.Source;
foundSet.Texture = range.Texture;
datas.Add(range.Texture, foundSet);
}
Vector3 normal = range.Normal;
//BlockSide side = Block.GetSideFromNormal(normal);
//Block bl = Block.Blocks[range.Source.GetGlobalID()];
//byte sideByte = 6;
//DataSet foundSet = null;
//sideByte = (byte)Block.GetSideInt(side);
//if (bl.UsesOneTexture)
//{
// side = BlockSide.AllSame;
// sideByte = (byte)Block.GetSideInt(side);
//}
//else
//{
// string tex = range.Texture;//bl.GetTextureForSide(side, range.Source.Metadata);
// int[] ids = Find(bl.GetTextures(range.Source.Metadata), tex);
// DataSet[] ds = new DataSet[ids.Length];
// KeyStruct key = new KeyStruct()
// {
// ID = range.Source.ID,
// Metadata = range.Source.Metadata,
// SideByte = sideByte,
// };
// for (int s = 0; s < ids.Length; s++)
// {
// KeyStruct k = new KeyStruct()
// {
// ID = range.Source.ID,
// Metadata = range.Source.Metadata,
// SideByte = (byte)ids[s]
// };
// if (datas.ContainsKey(k) && key != k)
// {
// ds[s] = datas[k];
// }
// }
// for (int e = 0; e < ds.Length; e++)
// if (ds[e] != null)
// {
// foundSet = ds[e];
// break;
// }
//}
//if (foundSet == null)
//{
// KeyStruct key = new KeyStruct()
// {
// ID = range.Source.ID,
// Metadata = range.Source.Metadata,
// SideByte = sideByte
// };
// if (!datas.ContainsKey(key))
// {
// datas.Add(key, new DataSet());
// datas[key].BaseData = range.Source;
// datas[key].SideByte = sideByte;
// foundSet = datas[key];
// }
// else
// {
// foundSet = datas[key];
// }
//}
//tri1: 1,2,3
//tri2: 3,4,1
//Vector3 tri1Norm = Vector3.Cross((range.Vertex2 - range.Vertex1), (range.Vertex3 - range.Vertex1));
//Vector3 tri2Norm = Vector3.Cross((range.Vertex3 - range.Vertex1), (range.Vertex4 - range.Vertex1));
Vector3 tri1Norm = normal;
Vector3 tri2Norm = normal;
if (range.TriFlip)// || (!range.TriFlip && (normal.X < 0 || normal.Y < 0 || normal.Z < 0)))
{
WriteTriangle(foundSet, range.Vertex3, range.Vertex2, range.Vertex1, range.UV3, range.UV2, range.UV1, tri1Norm);
if (!range.IsOneTriangle)
{
WriteTriangle(foundSet, range.Vertex1, range.Vertex4, range.Vertex3, range.UV1, range.UV4, range.UV3, tri2Norm);
}
}
else
{
WriteTriangle(foundSet, range.Vertex1, range.Vertex2, range.Vertex3, range.UV1, range.UV2, range.UV3, tri1Norm);
if (!range.IsOneTriangle)
{
WriteTriangle(foundSet, range.Vertex3, range.Vertex4, range.Vertex1, range.UV3, range.UV4, range.UV1, tri2Norm);
}
}
if (range.DoubleSided)
{
range.DoubleSided = false;
range.Normal = -range.Normal;
WriteCustomData(range, ref datas);
}
}
