public static void GenerateKulerIslandMap(List <String> files = null, int resolution = 1024, int padding = 0, string colorize = "Random", string wireframe = "None", float wirethickness = 2F)
{
/* Process Walkthrough
* 01: - collect all vertex data from each OBJ file
* 02: - sort tris into islands for colorizing
* 03: - create bitmaps
*/
if (files == null || files.Count() == 0)
{
return;
}
// list containg all the file assets collected
List <ModelAsset> Assets = new List <ModelAsset>();
/* 01 */
// loop through each file and collect the vertex data
foreach (string filepath in files)
{
// get data from file
if (filepath.ToLower().EndsWith(".obj"))
{
ModelAsset newAsset = ReadFileOBJ(filepath: filepath);
newAsset.SourceFile = filepath;
Assets.Add(newAsset);
Console.WriteLine("Completed Reading OBJ File - {0}", filepath);
}
}
/* 02 */
// loop through each assets collected data and sort into UV lands
// Matt's Algorithm
FindIslands(Assets);
/* 03 */
// eventually condense into foreach loop above - john
// Next Generate the actual bitmaps
foreach (ModelAsset asset in Assets)
{
//Create bitmap with padding and crop afterwards to avoid pixels being placed out of place
Bitmap bitmap = new Bitmap(Convert.ToInt32(resolution), Convert.ToInt32(resolution), System.Drawing.Imaging.PixelFormat.Format32bppArgb);
Graphics g = Graphics.FromImage(bitmap);
// make optional to use Alias or not Aliased
// Set the SmoothingMode property to smooth the line.
g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
// flip image on the y. UV space in 3d apps [0,0] starts in the bottom/left, images start start top/left
g.ScaleTransform(1.0F, -1.0F);
// Translate the drawing area accordingly
g.TranslateTransform(0.0F, -(float)resolution);
// clear canvas background to be black
g.Clear(Color.Black);
// color each island based on user settings
for (int i = 0; i < asset.Islands.Count; i++)
{
var island = asset.Islands[i];
// Create solid brush color based on user settings
Color col = GetRandomColor(colorize);
SolidBrush brush = new SolidBrush(col);
// draw the original fill color
foreach (Tri tri in island.TriList)
{
PointF A = ConvertUVSpaceToPixels(tri.posA, resolution, padding);
PointF B = ConvertUVSpaceToPixels(tri.posB, resolution, padding);
PointF C = ConvertUVSpaceToPixels(tri.posC, resolution, padding);
PointF[] Triangle = { A, B, C };
g.FillPolygon(brush, Triangle);
if (padding != 0)
{
Pen penPadding = new Pen(brush);
penPadding.LineJoin = System.Drawing.Drawing2D.LineJoin.Round;
penPadding.Width = padding;
g.DrawPolygon(penPadding, Triangle);
penPadding.Dispose();
}
}
// if we don't draw wire after the fill color it will appear broken
if (wireframe != "None")
{
foreach (Tri tri in island.TriList)
{
PointF A = ConvertUVSpaceToPixels(tri.posA, resolution, padding);
PointF B = ConvertUVSpaceToPixels(tri.posB, resolution, padding);
PointF C = ConvertUVSpaceToPixels(tri.posC, resolution, padding);
PointF[] Triangle = { A, B, C };
Pen penWire = wireframe == "White" ? new Pen(Brushes.White) : new Pen(Brushes.Black);
penWire.LineJoin = System.Drawing.Drawing2D.LineJoin.Round;
penWire.Width = wirethickness;
g.DrawPolygon(penWire, Triangle);
penWire.Dispose();
}
}
}
// save bitmap
var bmpFilepath = Path.ChangeExtension(asset.SourceFile, "_UVMap_KI.png");
string filepath = bmpFilepath;
bitmap.Save(filepath, ImageFormat.Png);
Console.WriteLine("Completed Image Creation - {0}", filepath);
}
}
// returns asset with tri list contain vert positions and corresponding indices
public static ModelAsset ReadFileOBJ(string filepath = "")
{
// complete asset
ModelAsset newAsset = new ModelAsset();
// list used to store position data from OBJ file
List<PointF> positionList = new List<PointF>();
// list used to store position indices from OBJ file
List<List<int>> indicesList = new List<List<int>>();
try
{
// Read each line of the file into a string array. Each element of the array is one line of the file.
string[] lines = System.IO.File.ReadAllLines(filepath);
// OBJ format: only collect valid UV Verts from lines which start with vt
foreach (string line in lines)
{
// TVerts - positions
if (line.StartsWith("vt"))
{
/* Example Lines
3dsMax: vt 0.0854 0.0854 0.0000
Maya: vt 0.0854 0.0854 0.0000
*/
// remove leading 'vt' text from each line of the file
char[] invalidChars = { 'v', 't', ' ' };
string pointString = line.TrimStart(invalidChars);
// remove any leading or trailing spaces
pointString = pointString.Trim();
// split each pt into it's respected parts X,Y,Z
string[] parts = pointString.Split(' ');
if (parts.Length >= 2)
{
float X = Convert.ToSingle(parts[0]);
float Y = Convert.ToSingle(parts[1]);
PointF pt = new PointF(X, Y);
positionList.Add(pt);
}
}
// TVert Indices
if (line.StartsWith("f "))
{
/* Example Lines
3dsMax: f 1/1 2/2 3/3 4/4
Maya: f 1/1/1 2/2/2 3/3/3 4/4/4
*/
// remove leading 'f' text from each line of the file
char[] invalidChars = { 'f', ' ' };
string pointString = line.TrimStart(invalidChars);
// remove any leading or trailing spaces
pointString = pointString.Trim();
// split each pt into it's respected parts A,B,C or A,B,C,D
string[] parts = pointString.Split(' ');
if (parts.Length >= 2)
{
// list containing indices collect from line of file
List<int> indices = new List<int>();
foreach (string p in parts)
{
string[] subParts = p.Split('/');
// the second value in the 1/1/1 is the vertex id
int id = Convert.ToInt32(subParts[1]);
indices.Add(id);
}
// generate Tri object for each tri in faces
// Important: offset the indices by '-1' since arrays start at 0 but indices in the OBJ files start at 1
// Matt@boomerlabs:: you should really do a -1 here and not bother later
switch (indices.Count)
{
case 3: // single tri face
Tri triA = new Tri();
triA.indexA = indices[0]-1;
triA.indexB = indices[1]-1;
triA.indexC = indices[2]-1;
newAsset.TriList.Add(triA);
break;
case 4: // quad face made of two tris
Tri triB = new Tri();
triB.indexA = indices[0]-1;
triB.indexB = indices[1]-1;
triB.indexC = indices[2]-1;
newAsset.TriList.Add(triB);
Tri triC = new Tri();
triC.indexA = indices[2]-1;
triC.indexB = indices[3]-1;
triC.indexC = indices[0]-1;
newAsset.TriList.Add(triC);
break;
}
}
}
}
}
catch (UnauthorizedAccessException) { }
// if UV coordinate data exists go through and assign positions to the Tri's
if (positionList.Count >= 3)
{
foreach (var t in newAsset.TriList)
{
t.posA = positionList[t.indexA];
t.posB = positionList[t.indexB];
t.posC = positionList[t.indexC];
}
}
// Store the number of verts
newAsset.numberOfVerts = positionList.Count();
return newAsset;
}
// returns asset with tri list contain vert positions and corresponding indices
public static ModelAsset ReadFileOBJ(string filepath = "")
{
// complete asset
ModelAsset newAsset = new ModelAsset();
// list used to store position data from OBJ file
List <PointF> positionList = new List <PointF>();
// list used to store position indices from OBJ file
List <List <int> > indicesList = new List <List <int> >();
try
{
// Read each line of the file into a string array. Each element of the array is one line of the file.
string[] lines = System.IO.File.ReadAllLines(filepath);
// OBJ format: only collect valid UV Verts from lines which start with vt
foreach (string line in lines)
{
// TVerts - positions
if (line.StartsWith("vt"))
{
/* Example Lines
* 3dsMax: vt 0.0854 0.0854 0.0000
* Maya: vt 0.0854 0.0854 0.0000
*/
// remove leading 'vt' text from each line of the file
char[] invalidChars = { 'v', 't', ' ' };
string pointString = line.TrimStart(invalidChars);
// remove any leading or trailing spaces
pointString = pointString.Trim();
// split each pt into it's respected parts X,Y,Z
string[] parts = pointString.Split(' ');
if (parts.Length >= 2)
{
float X = Convert.ToSingle(parts[0]);
float Y = Convert.ToSingle(parts[1]);
PointF pt = new PointF(X, Y);
positionList.Add(pt);
}
}
// TVert Indices
if (line.StartsWith("f "))
{
/* Example Lines
* 3dsMax: f 1/1 2/2 3/3 4/4
* Maya: f 1/1/1 2/2/2 3/3/3 4/4/4
*/
// remove leading 'f' text from each line of the file
char[] invalidChars = { 'f', ' ' };
string pointString = line.TrimStart(invalidChars);
// remove any leading or trailing spaces
pointString = pointString.Trim();
// split each pt into it's respected parts A,B,C or A,B,C,D
string[] parts = pointString.Split(' ');
if (parts.Length >= 2)
{
// list containing indices collect from line of file
List <int> indices = new List <int>();
foreach (string p in parts)
{
string[] subParts = p.Split('/');
// the second value in the 1/1/1 is the vertex id
int id = Convert.ToInt32(subParts[1]);
indices.Add(id);
}
// generate Tri object for each tri in faces
// Important: offset the indices by '-1' since arrays start at 0 but indices in the OBJ files start at 1
// Matt@boomerlabs:: you should really do a -1 here and not bother later
switch (indices.Count)
{
case 3: // single tri face
Tri triA = new Tri();
triA.indexA = indices[0] - 1;
triA.indexB = indices[1] - 1;
triA.indexC = indices[2] - 1;
newAsset.TriList.Add(triA);
break;
case 4: // quad face made of two tris
Tri triB = new Tri();
triB.indexA = indices[0] - 1;
triB.indexB = indices[1] - 1;
triB.indexC = indices[2] - 1;
newAsset.TriList.Add(triB);
Tri triC = new Tri();
triC.indexA = indices[2] - 1;
triC.indexB = indices[3] - 1;
triC.indexC = indices[0] - 1;
newAsset.TriList.Add(triC);
break;
}
}
}
}
}
catch (UnauthorizedAccessException) { }
// if UV coordinate data exists go through and assign positions to the Tri's
if (positionList.Count >= 3)
{
foreach (var t in newAsset.TriList)
{
t.posA = positionList[t.indexA];
t.posB = positionList[t.indexB];
t.posC = positionList[t.indexC];
}
}
// Store the number of verts
newAsset.numberOfVerts = positionList.Count();
return(newAsset);
}
