bool ModelDefinition::Deserialize(Deserializer &deserializer)
{
// Clear everything.
this->ClearMeshes();
this->ClearBones();
this->ClearAnimations(true); // <-- 'true' = clear animation segments, too.
this->ClearConvexHulls();
// We keep looping until we hit the null or unknown chunk.
Serialization::ChunkHeader header;
while (deserializer.Peek(&header, sizeof(header)) == sizeof(header))
{
bool finished = false;
switch (header.id)
{
case Serialization::ChunkID_Model_Bones:
{
deserializer.Seek(sizeof(header));
if (header.version == 1)
{
uint32_t boneCount;
deserializer.Read(boneCount);
for (uint32_t iBone = 0; iBone < boneCount; ++iBone)
{
// Name.
String name;
deserializer.ReadString(name);
// Local transform.
glm::vec3 position;
glm::quat rotation;
glm::vec3 scale;
deserializer.Read(position);
deserializer.Read(rotation);
deserializer.Read(scale);
// 4x4 offset matrix.
glm::mat4 offsetMatrix;
deserializer.Read(offsetMatrix);
auto bone = new Bone;
bone->SetName(name.c_str());
bone->SetPosition(position);
bone->SetRotation(rotation);
bone->SetScale(scale);
bone->SetOffsetMatrix(offsetMatrix);
this->AddBone(bone);
// We need to create a channel for this bone. We then need to map that channel to a bone.
auto &channel = m_animation.CreateChannel();
this->animationChannelBones.Add(bone, &channel);
}
// Parents.
auto boneParentIndices = static_cast<uint32_t*>(malloc(boneCount * sizeof(uint32_t)));
deserializer.Read(boneParentIndices, boneCount * sizeof(uint32_t));
for (uint32_t iBone = 0; iBone < boneCount; ++iBone)
{
uint32_t parentIndex = boneParentIndices[iBone];
if (parentIndex != static_cast<uint32_t>(-1))
{
m_bones[parentIndex]->AttachChild(*m_bones[iBone]);
}
}
free(boneParentIndices);
}
else
{
// Unsupported Version.
deserializer.Seek(header.sizeInBytes);
}
break;
}
case Serialization::ChunkID_Model_Meshes:
{
deserializer.Seek(sizeof(header));
if (header.version == 1)
{
uint32_t meshCount;
deserializer.Read(meshCount);
for (uint32_t iMesh = 0; iMesh < meshCount; ++iMesh)
{
ModelDefinition::Mesh newMesh(m_context);
// Name.
deserializer.ReadString(newMesh.name);
// Material
String materialName;
deserializer.ReadString(materialName);
newMesh.material = m_context.GetMaterialLibrary().Create(materialName.c_str());
// Geometry
VertexFormat vertexFormat;
vertexFormat.Deserialize(deserializer);
newMesh.geometry = Renderer::CreateVertexArray(VertexArrayUsage_Static, vertexFormat);
// Vertices.
uint32_t vertexCount;
deserializer.Read(vertexCount);
if (vertexCount > 0)
{
newMesh.geometry->SetVertexData(nullptr, static_cast<size_t>(vertexCount));
auto vertexData = newMesh.geometry->MapVertexData();
{
deserializer.Read(vertexData, vertexCount * vertexFormat.GetSizeInBytes());
}
newMesh.geometry->UnmapVertexData();
}
// Indices.
uint32_t indexCount;
deserializer.Read(indexCount);
if (indexCount > 0)
{
newMesh.geometry->SetIndexData(nullptr, static_cast<size_t>(indexCount));
auto indexData = newMesh.geometry->MapIndexData();
{
deserializer.Read(indexData, indexCount * sizeof(uint32_t));
}
newMesh.geometry->UnmapIndexData();
}
// Skinning Vertex Attributes
uint32_t skinningVertexAttributeCount;
deserializer.Read(skinningVertexAttributeCount);
if (skinningVertexAttributeCount > 0)
{
newMesh.skinningVertexAttributes = new SkinningVertexAttribute[skinningVertexAttributeCount];
auto counts = static_cast<uint16_t*>(malloc(skinningVertexAttributeCount * sizeof(uint16_t)));
deserializer.Read(counts, skinningVertexAttributeCount * sizeof(uint16_t));
uint32_t totalBoneWeights;
deserializer.Read(totalBoneWeights);
auto boneWeights = static_cast<BoneWeightPair*>(malloc(totalBoneWeights * sizeof(BoneWeightPair)));
deserializer.Read(boneWeights, totalBoneWeights * sizeof(BoneWeightPair));
auto currentBoneWeight = boneWeights;
for (uint32_t iVertex = 0; iVertex < skinningVertexAttributeCount; ++iVertex)
{
auto count = counts[iVertex];
// Here we allocate the buffer for the bones. We trick the vector here by modifying attributes directly.
newMesh.skinningVertexAttributes[iVertex].bones.Reserve(count);
newMesh.skinningVertexAttributes[iVertex].bones.count = count;
for (uint16_t iBone = 0; iBone < count; ++iBone)
{
newMesh.skinningVertexAttributes[iVertex].bones[iBone] = *currentBoneWeight++;
}
}
free(counts);
free(boneWeights);
}
// Uniforms.
newMesh.defaultUniforms.Deserialize(deserializer);
// Finally, add the mesh.
this->AddMesh(newMesh);
}
}
else
{
// Unsupported Version.
deserializer.Seek(header.sizeInBytes);
}
break;
}
case Serialization::ChunkID_Model_Animation:
{
deserializer.Seek(sizeof(header));
if (header.version == 1)
{
uint32_t keyFrameCount;
deserializer.Read(keyFrameCount);
for (size_t iKeyFrame = 0; iKeyFrame < keyFrameCount; ++iKeyFrame)
{
float time;
deserializer.Read(time);
size_t keyFrameIndex = m_animation.AppendKeyFrame(static_cast<double>(time));
// With the key frame added, we now need to iterate over each channel in the key frame.
uint32_t channelCount;
deserializer.Read(channelCount);
for (uint32_t iChannel = 0; iChannel < channelCount; ++iChannel)
{
uint32_t boneIndex;
deserializer.Read(boneIndex);
auto bone = m_bones[boneIndex];
assert(bone != nullptr);
{
auto iChannelBone = this->animationChannelBones.Find(bone);
assert(iChannelBone != nullptr);
{
auto channel = iChannelBone->value;
glm::vec3 position;
glm::quat rotation;
glm::vec3 scale;
deserializer.Read(position);
deserializer.Read(rotation);
deserializer.Read(scale);
auto key = new TransformAnimationKey(position, rotation, scale);
channel->SetKey(keyFrameIndex, key);
// We need to cache the key.
this->animationKeyCache.PushBack(key);
}
}
}
}
deserializer.Read(this->animationAABBPadding);
}
else
{
// Unsupported Version.
deserializer.Seek(header.sizeInBytes);
}
break;
}
case Serialization::ChunkID_Model_AnimationSegments:
{
deserializer.Seek(sizeof(header));
if (header.version == 1)
{
uint32_t animationSegmentCount;
deserializer.Read(animationSegmentCount);
for (uint32_t iSegment = 0; iSegment < animationSegmentCount; ++iSegment)
{
String name;
uint32_t startKeyFrame;
uint32_t endKeyFrame;
deserializer.ReadString(name);
deserializer.Read(startKeyFrame);
deserializer.Read(endKeyFrame);
m_animation.AddNamedSegment(name.c_str(), static_cast<size_t>(startKeyFrame), static_cast<size_t>(endKeyFrame));
}
}
else
{
// Unsupported Version.
deserializer.Seek(header.sizeInBytes);
}
break;
}
case Serialization::ChunkID_Model_AnimationSequences:
{
deserializer.Seek(sizeof(header));
if (header.version == 1)
{
}
else
{
// Unsupported Version.
deserializer.Seek(header.sizeInBytes);
}
break;
}
case Serialization::ChunkID_Model_ConvexHulls:
{
deserializer.Seek(sizeof(header));
if (header.version == 1)
{
uint32_t convexHullCount;
deserializer.Read(convexHullCount);
uint32_t* vertexCounts = static_cast<uint32_t*>(malloc(convexHullCount * sizeof(uint32_t)));
uint32_t* indexCounts = static_cast<uint32_t*>(malloc(convexHullCount * sizeof(uint32_t)));
deserializer.Read(vertexCounts, convexHullCount * sizeof(uint32_t));
deserializer.Read(indexCounts, convexHullCount * sizeof(uint32_t));
uint32_t totalVertexCount;
deserializer.Read(totalVertexCount);
uint32_t totalIndexCount;
deserializer.Read(totalIndexCount);
auto vertices = static_cast<float* >(malloc(totalVertexCount * sizeof(float)));
auto indices = static_cast<uint32_t*>(malloc(totalIndexCount * sizeof(uint32_t)));
deserializer.Read(vertices, totalVertexCount * sizeof(float));
deserializer.Read(indices, totalIndexCount * sizeof(uint32_t));
auto currentVertices = vertices;
auto currentIndices = indices;
for (uint32_t iConvexHull = 0; iConvexHull < convexHullCount; ++iConvexHull)
{
size_t vertexCount = static_cast<size_t>(vertexCounts[iConvexHull]);
size_t indexCount = static_cast<size_t>(indexCounts[iConvexHull]);
m_convexHulls.PushBack(new ConvexHull(currentVertices, vertexCount, currentIndices, indexCount));
// Now we need to move our pointers forward.
currentVertices += vertexCount * 3;
currentIndices += indexCount;
}
// Build Settings.
deserializer.Read(this->convexHullBuildSettings);
free(vertexCounts);
free(indexCounts);
free(vertices);
free(indices);
}
else
{
// Unsupported Version.
deserializer.Seek(header.sizeInBytes);
}
break;
}
case Serialization::ChunkID_Null:
{
deserializer.Seek(sizeof(header));
finished = true;
break;
}
default:
{
// Unknown chunk = Error.
finished = true;
return false;
}
}
if (finished)
{
break;
}
}
// If we get here, we were successful.
return true;
}
