/// <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 static GpcPolygon gpc_polygon_ToPolygon(gpc_polygon gpc_polygon)
{
GpcPolygon polygon = new GpcPolygon();
polygon.NofContours = gpc_polygon.num_contours;
polygon.ContourIsHole = new bool[polygon.NofContours];
polygon.Contour = new GpcVertexList[polygon.NofContours];
short[] holeShort = new short[polygon.NofContours];
IntPtr ptr = gpc_polygon.hole;
if (holeShort.Length > 0)
{
Marshal.Copy(gpc_polygon.hole, holeShort, 0, polygon.NofContours);
for (int i = 0; i < polygon.NofContours; i++)
polygon.ContourIsHole[i] = (holeShort[i] != 0);
ptr = gpc_polygon.contour;
for (int i = 0; i < polygon.NofContours; i++)
{
gpc_vertex_list gpc_vtx_list = (gpc_vertex_list)Marshal.PtrToStructure(ptr, typeof(gpc_vertex_list));
polygon.Contour[i] = new GpcVertexList();
polygon.Contour[i].NofVertices = gpc_vtx_list.num_vertices;
polygon.Contour[i].Vertex = new GpcVertex[polygon.Contour[i].NofVertices];
IntPtr ptr2 = gpc_vtx_list.vertex;
for (int j = 0; j < polygon.Contour[i].NofVertices; j++)
{
gpc_vertex gpc_vtx = (gpc_vertex)Marshal.PtrToStructure(ptr2, typeof(gpc_vertex));
polygon.Contour[i].Vertex[j].X = gpc_vtx.x;
polygon.Contour[i].Vertex[j].Y = gpc_vtx.y;
ptr2 = (IntPtr)(((int)ptr2) + Marshal.SizeOf(gpc_vtx));
}
ptr = (IntPtr)(((int)ptr) + Marshal.SizeOf(gpc_vtx_list));
}
}
return polygon;
}
private static gpc_polygon PolygonTo_gpc_polygon(GpcPolygon polygon)
{
gpc_polygon gpc_pol = new gpc_polygon();
gpc_pol.num_contours = polygon.NofContours;
int[] hole = new int[polygon.NofContours];
for (int i = 0; i < polygon.NofContours; i++)
hole[i] = (polygon.ContourIsHole[i] ? 1 : 0);
if (hole.Length > 0)
{
gpc_pol.hole = Marshal.AllocCoTaskMem(polygon.NofContours * Marshal.SizeOf(hole[0]));
Marshal.Copy(hole, 0, gpc_pol.hole, polygon.NofContours);
gpc_pol.contour = Marshal.AllocCoTaskMem(polygon.NofContours * Marshal.SizeOf(new gpc_vertex_list()));
IntPtr ptr = gpc_pol.contour;
for (int i = 0; i < polygon.NofContours; i++)
{
gpc_vertex_list gpc_vtx_list = new gpc_vertex_list();
gpc_vtx_list.num_vertices = polygon.Contour[i].NofVertices;
gpc_vtx_list.vertex = Marshal.AllocCoTaskMem(polygon.Contour[i].NofVertices * Marshal.SizeOf(new gpc_vertex()));
IntPtr ptr2 = gpc_vtx_list.vertex;
for (int j = 0; j < polygon.Contour[i].NofVertices; j++)
{
gpc_vertex gpc_vtx = new gpc_vertex();
gpc_vtx.x = polygon.Contour[i].Vertex[j].X;
gpc_vtx.y = polygon.Contour[i].Vertex[j].Y;
Marshal.StructureToPtr(gpc_vtx, ptr2, false);
ptr2 = (IntPtr)(((int)ptr2) + Marshal.SizeOf(gpc_vtx));
}
Marshal.StructureToPtr(gpc_vtx_list, ptr, false);
ptr = (IntPtr)(((int)ptr) + Marshal.SizeOf(gpc_vtx_list));
}
}
return gpc_pol;
}
public static void SavePolygon(string filename, bool writeHoleFlags, GpcPolygon polygon)
{
gpc_polygon gpc_polygon = GpcWrapper.PolygonTo_gpc_polygon(polygon);
IntPtr fp = fopen(filename, "wb");
gpc_write_polygon(fp, writeHoleFlags ? ((int)1) : ((int)0), ref gpc_polygon);
fclose(fp);
GpcWrapper.Free_gpc_polygon(gpc_polygon);
}
public static GpcTristrip PolygonToTristrip(GpcPolygon polygon)
{
gpc_tristrip gpc_strip = new gpc_tristrip();
gpc_polygon gpc_pol = GpcWrapper.PolygonTo_gpc_polygon(polygon);
gpc_polygon_to_tristrip(ref gpc_pol, ref gpc_strip);
GpcTristrip tristrip = GpcWrapper.gpc_strip_ToTristrip(gpc_strip);
GpcWrapper.Free_gpc_polygon(gpc_pol);
GpcWrapper.gpc_free_tristrip(ref gpc_strip);
return tristrip;
}
public static GpcTristrip ClipToTristrip(GpcOperation operation, GpcPolygon subject_polygon, GpcPolygon clip_polygon)
{
gpc_tristrip gpc_strip = new gpc_tristrip();
gpc_polygon gpc_subject_polygon = GpcWrapper.PolygonTo_gpc_polygon(subject_polygon);
gpc_polygon gpc_clip_polygon = GpcWrapper.PolygonTo_gpc_polygon(clip_polygon);
gpc_tristrip_clip(operation, ref gpc_subject_polygon, ref gpc_clip_polygon, ref gpc_strip);
GpcTristrip tristrip = GpcWrapper.gpc_strip_ToTristrip(gpc_strip);
GpcWrapper.Free_gpc_polygon(gpc_subject_polygon);
GpcWrapper.Free_gpc_polygon(gpc_clip_polygon);
GpcWrapper.gpc_free_tristrip(ref gpc_strip);
return tristrip;
}
public static GpcPolygon Clip(GpcOperation operation, GpcPolygon subject_polygon, GpcPolygon clip_polygon)
{
gpc_polygon gpc_polygon = new gpc_polygon();
gpc_polygon gpc_subject_polygon = GpcWrapper.PolygonTo_gpc_polygon(subject_polygon);
gpc_polygon gpc_clip_polygon = GpcWrapper.PolygonTo_gpc_polygon(clip_polygon);
gpc_polygon_clip(operation, ref gpc_subject_polygon, ref gpc_clip_polygon, ref gpc_polygon);
GpcPolygon polygon = GpcWrapper.gpc_polygon_ToPolygon(gpc_polygon);
GpcWrapper.Free_gpc_polygon(gpc_subject_polygon);
GpcWrapper.Free_gpc_polygon(gpc_clip_polygon);
GpcWrapper.gpc_free_polygon(ref gpc_polygon);
return polygon;
}
public GpcTristrip ClipToTristrip(GpcOperation operation, GpcPolygon polygon)
{
return GpcWrapper.ClipToTristrip(operation, this, polygon);
}