////////////////////////////////////////////////////////////////////////////////////////////////////
/// <summary> Collate's the lightmap geometry from a COLLADA file into a usable format. </summary>
///
/// <param name="colladaFile"> The collada file. </param>
///
/// <returns> A list of lightmap mesh data. </returns>
List<Lightmap> CollateLightmapGeometry(ColladaFile colladaFile)
{
var lightmapMeshes = new List<Lightmap>();
// Collect the geometry info
foreach (var geometry in colladaFile.LibraryGeometries.Geometry)
{
if (geometry.Mesh == null)
{
SendMessage(String.Format("The geometry {0} does not have a mesh", geometry.Name));
return null;
}
if (geometry.Mesh.Triangles.Count == 0)
{
SendMessage(String.Format("The geometry {0} has no triangles", geometry.Name));
return null;
}
// Get the lightmap index from the end of the geometry name
if(geometry.Name.EndsWith("-1"))
{
continue;
}
var indexString = Regex.Match(geometry.Name, @"\d+$").Value;
if (System.String.IsNullOrEmpty(indexString))
{
SendMessage(String.Format("The geometry {0} does not have the lightmap index at the end of it's name", geometry.Name));
return null;
}
int lightmapIndex = Int32.Parse(indexString);
// Create the lightmap entry
var lightmap = new Lightmap() { LightmapIndex = lightmapIndex, Faces = new List<Lightmap.Face>() };
foreach (var triangles in geometry.Mesh.Triangles)
{
// Get the input object containing the texture coordinates
var texcoord1Input = triangles.Input.Find(entry => (entry.Set == 1) && (entry.Semantic == ColladaInputSharedSemantic.TEXCOORD));
if (texcoord1Input == null)
{
SendMessage(String.Format("Unable to find a second texture coordinate for geometry {0}", geometry.Name));
return null;
}
var sourceID = texcoord1Input.Source.TrimStart('#');
// Get the source array for the coord data
var sourceArray = geometry.Mesh.Source.Find(
entry =>
{
return entry.ID.EndsWith(sourceID);
}
);
if (sourceArray == null)
{
SendMessage(String.Format("Unable to find a texture coordinate source array for geometry {0}", geometry.Name));
return null;
}
if (sourceArray.FloatArray == null)
{
SendMessage(String.Format("Unable to find a texture coordinate source array for geometry {0}", geometry.Name));
return null;
}
// Collect the vertex data
int sourceArrayStride = (int)sourceArray.TechniqueCommon.Accessor.Stride;
var indexStride = (triangles.P.Values.Count / 3) / (int)triangles.Count;
foreach (var faceIndex in Enumerable.Range(0, (int)triangles.Count))
{
var face = new Lightmap.Face();
// Get the index of the texture coordinates for the face vertices
int faceOffset = (indexStride * 3) * faceIndex; // Offset to start of current face
int vertex0Offset = faceOffset + (0 * indexStride) + (int)texcoord1Input.Offset;
int vertex1Offset = faceOffset + (1 * indexStride) + (int)texcoord1Input.Offset;
int vertex2Offset = faceOffset + (2 * indexStride) + (int)texcoord1Input.Offset;
int vertex0Index = triangles.P.Values[vertex0Offset];
int vertex1Index = triangles.P.Values[vertex1Offset];
int vertex2Index = triangles.P.Values[vertex2Offset];
// Get the data from the float array
int uIndex = (vertex0Index * sourceArrayStride);
int vIndex = (vertex0Index * sourceArrayStride) + 1;
face.Vertex0.X = sourceArray.FloatArray.Values[uIndex];
face.Vertex0.Y = (sourceArray.FloatArray.Values[vIndex] - 1) * -1;
uIndex = (vertex1Index * sourceArrayStride);
vIndex = (vertex1Index * sourceArrayStride) + 1;
face.Vertex1.X = sourceArray.FloatArray.Values[uIndex];
face.Vertex1.Y = (sourceArray.FloatArray.Values[vIndex] - 1) * -1;
uIndex = (vertex2Index * sourceArrayStride);
vIndex = (vertex2Index * sourceArrayStride) + 1;
face.Vertex2.X = sourceArray.FloatArray.Values[uIndex];
face.Vertex2.Y = (sourceArray.FloatArray.Values[vIndex] - 1) * -1;
lightmap.Faces.Add(face);
}
}
lightmapMeshes.Add(lightmap);
}
return lightmapMeshes;
}
////////////////////////////////////////////////////////////////////////////////////////////////////
/// <summary> Collate's the lightmap geometry from a COLLADA file into a usable format. </summary>
///
/// <param name="colladaFile"> The collada file. </param>
///
/// <returns> A list of lightmap mesh data. </returns>
List <Lightmap> CollateLightmapGeometry(ColladaFile colladaFile)
{
var lightmapMeshes = new List <Lightmap>();
// Collect the geometry info
foreach (var geometry in colladaFile.LibraryGeometries.Geometry)
{
if (geometry.Mesh == null)
{
SendMessage(String.Format("The geometry {0} does not have a mesh", geometry.Name));
return(null);
}
if (geometry.Mesh.Triangles.Count == 0)
{
SendMessage(String.Format("The geometry {0} has no triangles", geometry.Name));
return(null);
}
// Get the lightmap index from the end of the geometry name
if (geometry.Name.EndsWith("-1"))
{
continue;
}
var indexString = Regex.Match(geometry.Name, @"\d+$").Value;
if (System.String.IsNullOrEmpty(indexString))
{
SendMessage(String.Format("The geometry {0} does not have the lightmap index at the end of it's name", geometry.Name));
return(null);
}
int lightmapIndex = Int32.Parse(indexString);
// Create the lightmap entry
var lightmap = new Lightmap()
{
LightmapIndex = lightmapIndex, Faces = new List <Lightmap.Face>()
};
foreach (var triangles in geometry.Mesh.Triangles)
{
// Get the input object containing the texture coordinates
var texcoord1Input = triangles.Input.Find(entry => (entry.Set == 1) && (entry.Semantic == ColladaInputSharedSemantic.TEXCOORD));
if (texcoord1Input == null)
{
SendMessage(String.Format("Unable to find a second texture coordinate for geometry {0}", geometry.Name));
return(null);
}
var sourceID = texcoord1Input.Source.TrimStart('#');
// Get the source array for the coord data
var sourceArray = geometry.Mesh.Source.Find(
entry =>
{
return(entry.ID.EndsWith(sourceID));
}
);
if (sourceArray == null)
{
SendMessage(String.Format("Unable to find a texture coordinate source array for geometry {0}", geometry.Name));
return(null);
}
if (sourceArray.FloatArray == null)
{
SendMessage(String.Format("Unable to find a texture coordinate source array for geometry {0}", geometry.Name));
return(null);
}
// Collect the vertex data
int sourceArrayStride = (int)sourceArray.TechniqueCommon.Accessor.Stride;
var indexStride = (triangles.P.Values.Count / 3) / (int)triangles.Count;
foreach (var faceIndex in Enumerable.Range(0, (int)triangles.Count))
{
var face = new Lightmap.Face();
// Get the index of the texture coordinates for the face vertices
int faceOffset = (indexStride * 3) * faceIndex; // Offset to start of current face
int vertex0Offset = faceOffset + (0 * indexStride) + (int)texcoord1Input.Offset;
int vertex1Offset = faceOffset + (1 * indexStride) + (int)texcoord1Input.Offset;
int vertex2Offset = faceOffset + (2 * indexStride) + (int)texcoord1Input.Offset;
int vertex0Index = triangles.P.Values[vertex0Offset];
int vertex1Index = triangles.P.Values[vertex1Offset];
int vertex2Index = triangles.P.Values[vertex2Offset];
// Get the data from the float array
int uIndex = (vertex0Index * sourceArrayStride);
int vIndex = (vertex0Index * sourceArrayStride) + 1;
face.Vertex0.X = sourceArray.FloatArray.Values[uIndex];
face.Vertex0.Y = (sourceArray.FloatArray.Values[vIndex] - 1) * -1;
uIndex = (vertex1Index * sourceArrayStride);
vIndex = (vertex1Index * sourceArrayStride) + 1;
face.Vertex1.X = sourceArray.FloatArray.Values[uIndex];
face.Vertex1.Y = (sourceArray.FloatArray.Values[vIndex] - 1) * -1;
uIndex = (vertex2Index * sourceArrayStride);
vIndex = (vertex2Index * sourceArrayStride) + 1;
face.Vertex2.X = sourceArray.FloatArray.Values[uIndex];
face.Vertex2.Y = (sourceArray.FloatArray.Values[vIndex] - 1) * -1;
lightmap.Faces.Add(face);
}
}
lightmapMeshes.Add(lightmap);
}
return(lightmapMeshes);
}
