public static ModelMeshData LoadGeometry(ModelData data, ModelBoneData parentBoneData, ColladaGeometry geometry)
{
ModelMeshData modelMeshData = new ModelMeshData();
data.Meshes.Add(modelMeshData);
modelMeshData.Name = parentBoneData.Name;
modelMeshData.ParentBoneIndex = data.Bones.IndexOf(parentBoneData);
bool flag = false;
foreach (ColladaPolygons polygon in geometry.Mesh.Polygons)
{
ModelMeshPartData modelMeshPartData = LoadPolygons(data, polygon);
modelMeshData.MeshParts.Add(modelMeshPartData);
modelMeshData.BoundingBox = (flag ? BoundingBox.Union(modelMeshData.BoundingBox, modelMeshPartData.BoundingBox) : modelMeshPartData.BoundingBox);
flag = true;
}
return(modelMeshData);
}
public static ModelMeshPartData LoadPolygons(ModelData data, ColladaPolygons polygons)
{
ModelMeshPartData modelMeshPartData = new ModelMeshPartData();
int num = 0;
Dictionary <VertexElement, ColladaInput> dictionary = new Dictionary <VertexElement, ColladaInput>();
foreach (ColladaInput input in polygons.Inputs)
{
string str = (input.Set == 0) ? string.Empty : input.Set.ToString(CultureInfo.InvariantCulture);
if (input.Semantic == "POSITION")
{
dictionary[new VertexElement(num, VertexElementFormat.Vector3, "POSITION" + str)] = input;
num += 12;
}
else if (input.Semantic == "NORMAL")
{
dictionary[new VertexElement(num, VertexElementFormat.Vector3, "NORMAL" + str)] = input;
num += 12;
}
else if (input.Semantic == "TEXCOORD")
{
dictionary[new VertexElement(num, VertexElementFormat.Vector2, "TEXCOORD" + str)] = input;
num += 8;
}
else if (input.Semantic == "COLOR")
{
dictionary[new VertexElement(num, VertexElementFormat.NormalizedByte4, "COLOR" + str)] = input;
num += 4;
}
}
VertexDeclaration vertexDeclaration = new VertexDeclaration(dictionary.Keys.ToArray());
ModelBuffersData modelBuffersData = data.Buffers.FirstOrDefault((ModelBuffersData vd) => vd.VertexDeclaration == vertexDeclaration);
if (modelBuffersData == null)
{
modelBuffersData = new ModelBuffersData();
data.Buffers.Add(modelBuffersData);
modelBuffersData.VertexDeclaration = vertexDeclaration;
}
modelMeshPartData.BuffersDataIndex = data.Buffers.IndexOf(modelBuffersData);
int num2 = polygons.P.Count / polygons.Inputs.Count;
List <int> list = new List <int>();
if (polygons.VCount.Count == 0)
{
int num3 = 0;
for (int i = 0; i < num2 / 3; i++)
{
list.Add(num3);
list.Add(num3 + 2);
list.Add(num3 + 1);
num3 += 3;
}
}
else
{
int num4 = 0;
using (List <int> .Enumerator enumerator2 = polygons.VCount.GetEnumerator())
{
while (enumerator2.MoveNext())
{
switch (enumerator2.Current)
{
case 3:
list.Add(num4);
list.Add(num4 + 2);
list.Add(num4 + 1);
num4 += 3;
break;
case 4:
list.Add(num4);
list.Add(num4 + 2);
list.Add(num4 + 1);
list.Add(num4 + 2);
list.Add(num4);
list.Add(num4 + 3);
num4 += 4;
break;
default:
throw new NotSupportedException("Collada polygons with less than 3 or more than 4 vertices are not supported.");
}
}
}
}
int vertexStride = modelBuffersData.VertexDeclaration.VertexStride;
int num5 = modelBuffersData.Vertices.Length;
modelBuffersData.Vertices = ExtendArray(modelBuffersData.Vertices, list.Count * vertexStride);
using (BinaryWriter binaryWriter = new BinaryWriter(new MemoryStream(modelBuffersData.Vertices, num5, list.Count * vertexStride)))
{
bool flag = false;
foreach (KeyValuePair <VertexElement, ColladaInput> item in dictionary)
{
VertexElement key = item.Key;
ColladaInput value = item.Value;
if (key.Semantic.StartsWith("POSITION"))
{
for (int j = 0; j < list.Count; j++)
{
float[] array = value.Source.Accessor.Source.Array;
int offset = value.Source.Accessor.Offset;
int stride = value.Source.Accessor.Stride;
int num6 = polygons.P[list[j] * polygons.Inputs.Count + value.Offset];
binaryWriter.BaseStream.Position = j * vertexStride + key.Offset;
float num7 = array[offset + stride * num6];
float num8 = array[offset + stride * num6 + 1];
float num9 = array[offset + stride * num6 + 2];
modelMeshPartData.BoundingBox = (flag ? BoundingBox.Union(modelMeshPartData.BoundingBox, new Vector3(num7, num8, num9)) : new BoundingBox(num7, num8, num9, num7, num8, num9));
flag = true;
binaryWriter.Write(num7);
binaryWriter.Write(num8);
binaryWriter.Write(num9);
}
}
else if (key.Semantic.StartsWith("NORMAL"))
{
for (int k = 0; k < list.Count; k++)
{
float[] array2 = value.Source.Accessor.Source.Array;
int offset2 = value.Source.Accessor.Offset;
int stride2 = value.Source.Accessor.Stride;
int num10 = polygons.P[list[k] * polygons.Inputs.Count + value.Offset];
binaryWriter.BaseStream.Position = k * vertexStride + key.Offset;
float num11 = array2[offset2 + stride2 * num10];
float num12 = array2[offset2 + stride2 * num10 + 1];
float num13 = array2[offset2 + stride2 * num10 + 2];
float num14 = 1f / MathUtils.Sqrt(num11 * num11 + num12 * num12 + num13 * num13);
binaryWriter.Write(num14 * num11);
binaryWriter.Write(num14 * num12);
binaryWriter.Write(num14 * num13);
}
}
else if (key.Semantic.StartsWith("TEXCOORD"))
{
for (int l = 0; l < list.Count; l++)
{
float[] array3 = value.Source.Accessor.Source.Array;
int offset3 = value.Source.Accessor.Offset;
int stride3 = value.Source.Accessor.Stride;
int num15 = polygons.P[list[l] * polygons.Inputs.Count + value.Offset];
binaryWriter.BaseStream.Position = l * vertexStride + key.Offset;
binaryWriter.Write(array3[offset3 + stride3 * num15]);
binaryWriter.Write(1f - array3[offset3 + stride3 * num15 + 1]);
}
}
else
{
if (!key.Semantic.StartsWith("COLOR"))
{
throw new Exception();
}
for (int m = 0; m < list.Count; m++)
{
float[] array4 = value.Source.Accessor.Source.Array;
int offset4 = value.Source.Accessor.Offset;
int stride4 = value.Source.Accessor.Stride;
int num16 = polygons.P[list[m] * polygons.Inputs.Count + value.Offset];
binaryWriter.BaseStream.Position = m * vertexStride + key.Offset;
Color color = new Color(array4[offset4 + stride4 * num16], array4[offset4 + stride4 * num16 + 1], array4[offset4 + stride4 * num16 + 2], array4[offset4 + stride4 * num16 + 3]);
binaryWriter.Write(color.PackedValue);
}
}
}
}
modelMeshPartData.StartIndex = num5 / vertexStride;
modelMeshPartData.IndicesCount = list.Count;
return(modelMeshPartData);
}
