public Mesh LoadFromStream(EndianBinaryReader reader)
{
MeshVertexAttributeHolder vertexData = null;
SceneNode rootNode = new SceneNode();
List<Texture2D> textureList = new List<Texture2D>();
List<WEditor.Common.Nintendo.J3D.Material> materialList = null;
List<SkeletonBone> joints = new List<SkeletonBone>();
DrawInfo drawInfo = null;
Envelopes envelopes = null;
Mesh j3dMesh = new Mesh();
// Read the Header
int magic = reader.ReadInt32(); // J3D1, J3D2, etc
if (magic != 1244873778)
{
WLog.Warning(LogCategory.ModelLoading, null, "Attempted to load model with invalid magic, ignoring!");
return null;
}
int j3dType = reader.ReadInt32(); // BMD3 (models) BDL4 (models), jpa1 (particles), bck1 (animations), etc.
int totalFileSize = reader.ReadInt32();
int chunkCount = reader.ReadInt32();
// Skip over an unused tag (consistent in all files) and some padding.
reader.ReadBytes(16);
for (int i = 0; i < chunkCount; i++)
{
long chunkStart = reader.BaseStream.Position;
string tagName = reader.ReadString(4);
int chunkSize = reader.ReadInt32();
switch (tagName)
{
// INFO - Vertex Count, Scene Hierarchy
case "INF1":
rootNode = LoadINF1FromFile(rootNode, reader, chunkStart);
break;
// VERTEX - Stores vertex arrays for pos/normal/color0/tex0 etc. Contains VertexAttributes which describe
// how this data is stored/laid out.
case "VTX1":
vertexData = LoadVTX1FromFile(reader, chunkStart, chunkSize);
break;
// ENVELOPES - Defines vertex weights for skinning.
case "EVP1":
envelopes = LoadEVP1FromStream(reader, chunkStart);
break;
// DRAW (Skeletal Animation Data) - Stores which matrices are weighted, and which are used directly.
case "DRW1":
drawInfo = LoadDRW1FromStream(reader, chunkStart);
break;
// JOINTS - Stores the skeletal joints (position, rotation, scale, etc.)
case "JNT1":
joints = LoadJNT1SectionFromStream(reader, chunkStart);
break;
// SHAPE - Face/Triangle information for model.
case "SHP1":
LoadSHP1SectionFromFile(vertexData, j3dMesh, reader, chunkStart);
break;
// MATERIAL - Stores materials (which describes how textures, etc. are drawn)
case "MAT3":
materialList = LoadMAT3SectionFromStream(reader, chunkStart, chunkSize);
break;
// TEXTURES - Stores binary texture images.
case "TEX1":
textureList = LoadTEX1FromFile(reader, chunkStart);
break;
// MODEL - Seems to be bypass commands for Materials and invokes GX registers directly.
case "MDL3":
break;
}
reader.BaseStream.Position = chunkStart + chunkSize;
}
// Resolve the texture indexes into actual textures now that we've loaded the TEX1 section.
foreach (Material mat in materialList)
{
for (int i = 0; i < mat.TextureIndexes.Length; i++)
{
short index = mat.TextureIndexes[i];
if (index < 0)
continue;
mat.Textures[i] = textureList[index];
}
}
// loltests
for (int i = 0; i < materialList.Count; i++)
{
materialList[i].VtxDesc = j3dMesh.SubMeshes[0].GetVertexDescription();
Shader shader = TEVShaderGenerator.GenerateShader(materialList[i]);
materialList[i].Shader = shader;
}
// We're going to do something a little crazy - we're going to read the scene view and apply textures to meshes (for now)
Material curMat = null;
AssignMaterialsToMeshRecursive(rootNode, j3dMesh, ref curMat, materialList);
List<SkeletonBone> skeleton = new List<SkeletonBone>();
BuildSkeletonRecursive(rootNode, skeleton, joints, 0);
j3dMesh.Skeleton = skeleton;
j3dMesh.BindPoses = envelopes.inverseBindPose;
// Let's do some ugly post-processing here to see if we can't resolve all of the cross-references and turn it into
// a normal computer-readable format that we can digest in our RenderSytem.
{
for (int i = 0; i < j3dMesh.SubMeshes.Count; i++)
{
MeshBatch batch = j3dMesh.SubMeshes[i];
batch.BoneWeights = new BoneWeight[batch.Vertices.Length];
for (int j = 0; j < batch.PositionMatrixIndexs.Count; j++)
{
// Okay so this is where it gets more complicated. The PMI gives us an index into the MatrixTable for the packet, which we
// resolve and call "drawIndexes" - however we have to divide the number they give us by three for some reason, so that is
// already done and now our drawIndexes array should be one-index-for-every-vertex-in-batch and it should be the index into
// the draw section we need.
ushort drw1Index = batch.drawIndexes[j];
// The drw1Index can be set as 0xFFFF - if so, this means that you need to use the dr1Index of the previous one.
// until it is no longer 0xFFFF.
int counter = 0;
while (drw1Index == 0xFFFF)
{
drw1Index = batch.drawIndexes[j - counter];
counter++;
}
bool isWeighted = drawInfo.IsWeighted[drw1Index];
BoneWeight weight = new BoneWeight();
if (isWeighted)
{
// Something on this doesn't work for models that actually specify a PositionMatrixIndex.
// So... some math is off somewhere and I don't know where for the moment.
ushort numBonesAffecting = envelopes.numBonesAffecting[drw1Index];
weight.BoneIndexes = new ushort[numBonesAffecting];
weight.BoneWeights = new float[numBonesAffecting];
// "Much WTFs"
ushort offset = 0;
for (ushort e = 0; e < envelopes.indexRemap[drw1Index]; e++)
{
offset += envelopes.numBonesAffecting[e];
}
offset *= 2;
Matrix4 finalTransform = Matrix4.Identity;
for (ushort k = 0; k < numBonesAffecting; k++)
{
ushort boneIndex = envelopes.indexRemap[offset + (k * 0x2)];
float boneWeight = envelopes.weights[(offset / 2) + k];
weight.BoneIndexes[k] = boneIndex;
weight.BoneWeights[k] = boneWeight;
// This was apaprently a partial thought I never finished or got working in the old one? :S
}
}
else
{
// If the vertex isn't weighted, we just use the position from the bone matrix.
SkeletonBone joint = skeleton[drawInfo.Indexes[drw1Index]];
Matrix4 translation = Matrix4.CreateTranslation(joint.Translation);
Matrix4 rotation = Matrix4.CreateFromQuaternion(joint.Rotation);
Matrix4 finalMatrix = rotation * translation;
// Move the mesh by transforming the position by this much.
// I think we can just assign full weight to the first bone index and call it good.
weight.BoneIndexes = new[] { drawInfo.Indexes[drw1Index] };
weight.BoneWeights = new[] { 1f };
}
batch.BoneWeights[j] = weight;
}
}
}
return j3dMesh;
}
