public void FromDAE(string daePath)
{
XML.XMLtag dae = new XML(File.ReadAllText(daePath)).GetFirstRootTagWithName("COLLADA");
XML.XMLtag library_images = dae.GetFirstChildWithName("library_images");
XML.XMLtag library_materials = dae.GetFirstChildWithName("library_materials");
XML.XMLtag library_effects = dae.GetFirstChildWithName("library_effects");
XML.XMLtag library_geometries = dae.GetFirstChildWithName("library_geometries");
XML.XMLtag library_visual_scenes = dae.GetFirstChildWithName("library_visual_scenes");
Console.WriteLine("ready to parse dae");
if (library_geometries != null)
{
foreach (XML.XMLtag geometry in library_geometries.children)
{
meshes.Add(new DAEMesh(geometry).actualMesh);
}
}
if (library_visual_scenes != null)
{
foreach (XML.XMLtag node in library_visual_scenes.GetFirstChildWithName("visual_scene").GetChildrenWithName("node"))
{
XML.XMLtag instance_geometry = node.GetFirstChildWithName("instance_geometry");
if (instance_geometry != null)
{
string meshID = instance_geometry.GetParamValue("url");
meshID = meshID.Substring(1, meshID.Length - 1); //remove hashtag at start
Console.WriteLine("TODO: Now we can look up the mesh in the DAE virtual scene and apply its scene translation etc to it. ");
}
}
}
//temp
File.WriteAllLines("test.obj", MakeOBJ());
}
public DAEMesh(XML.XMLtag geometryXMLtag)
{
name = geometryXMLtag.GetParamValue("id");
XML.XMLtag meshXMLtag = geometryXMLtag.GetFirstChildWithName("mesh");
XML.XMLtag trianglesXMLtag = meshXMLtag.GetFirstChildWithName("triangles");
//the "triangles" XML tag contains, among other things, the names of the arrays within "mesh" that contain important model data (position, normals, etc)
List <XML.XMLtag> sources = meshXMLtag.GetChildrenWithName("source");
foreach (XML.XMLtag input in trianglesXMLtag.GetChildrenWithName("input"))
{
string source = input.GetParamValue("source");
source = source.Substring(1, source.Length - 1); //removes hashtag at start
int offset = int.Parse(input.GetParamValue("offset"));
string dataType = input.GetParamValue("semantic");
switch (dataType)
{
case "VERTEX": //This one is not a direct reference like the others, so it has an extra two lines first
{
source = meshXMLtag.GetFirstChildWithName("vertices").GetFirstChildWithName("input").GetParamValue("source");
source = source.Substring(1, source.Length - 1); //removes hashtag at start
XML.XMLtag positionXMLtag = meshXMLtag.GetFirstChildWithParamAndValue("id", "\"" + source + "\"");
string arrayName = GetDAEInputArrayName(positionXMLtag);
XML.XMLtag floatArray = positionXMLtag.GetFirstChildWithParamAndValue("id", "\"" + arrayName + "\"");
string[] floatArrayString = floatArray.data.Replace('\n', ' ').Split(' ');
int count = int.Parse(floatArray.GetParamValue("count"));
List <MorcuMath.Vector3> positions = new List <MorcuMath.Vector3>();
for (int i = 0; i < count; i += 3)
{
positions.Add(new Vector3(float.Parse(floatArrayString[i]), float.Parse(floatArrayString[i + 1]), float.Parse(floatArrayString[i + 2])));
}
offsetsAndLists.Add(offset, new DAEVertexData(dataType, positions));
}
break;
case "NORMAL":
{
XML.XMLtag normalXMLtag = meshXMLtag.GetFirstChildWithParamAndValue("id", "\"" + source + "\"");
string arrayName = GetDAEInputArrayName(normalXMLtag);
XML.XMLtag floatArray = normalXMLtag.GetFirstChildWithParamAndValue("id", "\"" + arrayName + "\"");
string[] floatArrayString = floatArray.data.Replace('\n', ' ').Split(' ');
int count = int.Parse(floatArray.GetParamValue("count"));
List <MorcuMath.Vector3> normals = new List <MorcuMath.Vector3>();
for (int i = 0; i < count; i += 3)
{
normals.Add(new MorcuMath.Vector3(float.Parse(floatArrayString[i]), float.Parse(floatArrayString[i + 1]), float.Parse(floatArrayString[i + 2])));
}
offsetsAndLists.Add(offset, new DAEVertexData(dataType, normals));
}
break;
case "TEXCOORD":
{
int UVchannel = 0;
int.TryParse(input.GetParamValue("set"), out UVchannel);
XML.XMLtag texcoordXMLtag = meshXMLtag.GetFirstChildWithParamAndValue("id", "\"" + source + "\"");
string arrayName = GetDAEInputArrayName(texcoordXMLtag);
XML.XMLtag floatArray = texcoordXMLtag.GetFirstChildWithParamAndValue("id", "\"" + arrayName + "\"");
string[] floatArrayString = floatArray.data.Replace('\n', ' ').Split(' ');
int count = int.Parse(floatArray.GetParamValue("count"));
List <MorcuMath.Vector2> newUVMap = new List <MorcuMath.Vector2>();
for (int i = 0; i < count; i += 2)
{
newUVMap.Add(new Vector2(float.Parse(floatArrayString[i]), float.Parse(floatArrayString[i + 1])));
}
offsetsAndLists.Add(offset, new DAEVertexData(dataType, newUVMap, UVchannel));
}
break;
case "COLOR": // Color coordinate vector
{
XML.XMLtag colorXMLtag = meshXMLtag.GetFirstChildWithParamAndValue("id", "\"" + source + "\"");
string arrayName = GetDAEInputArrayName(colorXMLtag);
XML.XMLtag accessor = colorXMLtag.GetFirstChildWithName("technique_common").GetFirstChildWithName("accessor");
List <XML.XMLtag> colorComponents = accessor.GetChildrenWithName("param");
string[] components = new string[colorComponents.Count];
for (int i = 0; i < colorComponents.Count; i++)
{
components[i] = colorComponents[i].GetParamValue("name"); //will return R, G, B, or A. We do this to find out which order the components are in and how many there are (i.e. whether A is included or not)
}
XML.XMLtag floatArray = colorXMLtag.GetFirstChildWithParamAndValue("id", "\"" + arrayName + "\"");
string[] floatArrayString = floatArray.data.Replace('\n', ' ').Split(' ');
int count = int.Parse(floatArray.GetParamValue("count"));
List <Color> colors = new List <Color>();
for (int i = 0; i < count; i += components.Length)
{
double R = 255;
double G = 255;
double B = 255;
double A = 255;
for (int j = 0; j < components.Length; j++)
{
switch (components[j])
{
case "R":
R *= double.Parse(floatArrayString[i + j]);
break;
case "G":
G *= double.Parse(floatArrayString[i + j]);
break;
case "B":
B *= double.Parse(floatArrayString[i + j]);
break;
case "A":
A *= double.Parse(floatArrayString[i + j]);
break;
default:
Console.WriteLine("Unknown colour component: " + components[j]);
break;
}
}
colors.Add(Color.FromArgb((int)Math.Round(A), (int)Math.Round(R), (int)Math.Round(G), (int)Math.Round(B)));
}
offsetsAndLists.Add(offset, new DAEVertexData(dataType, colors));
}
break;
default:
Console.WriteLine("Unknown array type in mesh: " + input.GetParamValue("semantic"));
break;
}
}
string[] indicesArrayString = trianglesXMLtag.GetFirstChildWithName("p").data.Replace('\n', ' ').Split(' ');
int[] vertexDataOffsets = offsetsAndLists.Keys.ToList <int>().OrderBy(o => o).ToArray();
actualMesh = new Mesh();
Face newFace = null;
for (int i = 0; i < indicesArrayString.Length; i += vertexDataOffsets.Length)
{
Vertex newVertex = new Vertex();
if ((i / vertexDataOffsets.Length % 3) == 0)
{
if (newFace != null)
{
actualMesh.faces.Add(newFace);
}
newFace = new Face();
newFace.v1 = i / vertexDataOffsets.Length;
}
else if (((i - vertexDataOffsets.Length) / vertexDataOffsets.Length % 3) == 0)
{
newFace.v2 = i / vertexDataOffsets.Length;
}
else if (((i + vertexDataOffsets.Length) / vertexDataOffsets.Length % 3) == 0)
{
newFace.v3 = i / vertexDataOffsets.Length;
}
for (int j = 0; j < vertexDataOffsets.Length; j++)
{
switch (offsetsAndLists[vertexDataOffsets[j]].dataType)
{
case "VERTEX":
case "POSITION":
newVertex.position = ((List <MorcuMath.Vector3>)offsetsAndLists[vertexDataOffsets[j]].list)[int.Parse(indicesArrayString[i + j])];
break;
case "NORMAL":
newVertex.normal = ((List <MorcuMath.Vector3>)offsetsAndLists[vertexDataOffsets[j]].list)[int.Parse(indicesArrayString[i + j])];
break;
case "TEXCOORD":
DAEVertexData daeVertexData = offsetsAndLists[vertexDataOffsets[j]]; // just a shortcut because we have to access it twice
newVertex.UVchannels[daeVertexData.set] = ((List <MorcuMath.Vector2>)daeVertexData.list)[int.Parse(indicesArrayString[i + j])];
break;
case "COLOR":
newVertex.color = ((List <Color>)offsetsAndLists[vertexDataOffsets[j]].list)[int.Parse(indicesArrayString[i + j])];
break;
}
}
actualMesh.vertices.Add(newVertex);
}
actualMesh.faces.Add(newFace); //add the last face (because otherwise it doesn't get processed at the start of the next loop like all the others do)
Console.WriteLine("DAE mesh parsed successfully");
}
public string GetDAEInputArrayName(XML.XMLtag tag)
{
string output = tag.GetFirstChildWithName("technique_common").GetFirstChildWithName("accessor").GetParamValue("source");
return(output.Substring(1, output.Length - 1)); //remove the hashtag from the beginning
}
