void CAssParser::CalculatePerMeshMinMax(SAssModel* model)
{
const aiScene* scene = model->scene;
model->mesh_minmax.resize(scene->mNumMeshes);
for (size_t i = 0; i < scene->mNumMeshes; i++) {
const aiMesh& mesh = *scene->mMeshes[i];
SAssModel::MinMax& minmax = model->mesh_minmax[i];
minmax.mins = DEF_MIN_SIZE;
minmax.maxs = DEF_MAX_SIZE;
for (size_t vertexIndex= 0; vertexIndex < mesh.mNumVertices; vertexIndex++) {
const aiVector3D& aiVertex = mesh.mVertices[vertexIndex];
minmax.mins = std::min(minmax.mins, aiVectorToFloat3(aiVertex));
minmax.maxs = std::max(minmax.maxs, aiVectorToFloat3(aiVertex));
}
if (minmax.mins == DEF_MIN_SIZE)
minmax.mins = ZeroVector;
if (minmax.maxs == DEF_MAX_SIZE)
minmax.maxs = ZeroVector;
}
}
void CAssParser::LoadPieceGeometry(SAssPiece* piece, const aiNode* pieceNode, const aiScene* scene)
{
// Get vertex data from node meshes
for (unsigned meshListIndex = 0; meshListIndex < pieceNode->mNumMeshes; ++meshListIndex) {
const unsigned int meshIndex = pieceNode->mMeshes[meshListIndex];
const aiMesh* mesh = scene->mMeshes[meshIndex];
LOG_SL(LOG_SECTION_PIECE, L_DEBUG, "Fetching mesh %d from scene", meshIndex);
LOG_SL(LOG_SECTION_PIECE, L_DEBUG,
"Processing vertices for mesh %d (%d vertices)",
meshIndex, mesh->mNumVertices);
LOG_SL(LOG_SECTION_PIECE, L_DEBUG,
"Normals: %s Tangents/Bitangents: %s TexCoords: %s",
(mesh->HasNormals() ? "Y" : "N"),
(mesh->HasTangentsAndBitangents() ? "Y" : "N"),
(mesh->HasTextureCoords(0) ? "Y" : "N"));
piece->vertices.reserve(piece->vertices.size() + mesh->mNumVertices);
piece->vertexDrawIndices.reserve(piece->vertexDrawIndices.size() + mesh->mNumFaces * 3);
std::vector<unsigned> mesh_vertex_mapping;
// extract vertex data per mesh
for (unsigned vertexIndex = 0; vertexIndex < mesh->mNumVertices; ++vertexIndex) {
const aiVector3D& aiVertex = mesh->mVertices[vertexIndex];
SAssVertex vertex;
// vertex coordinates
vertex.pos = aiVectorToFloat3(aiVertex);
// update piece min/max extents
piece->mins = float3::min(piece->mins, vertex.pos);
piece->maxs = float3::max(piece->maxs, vertex.pos);
// vertex normal
LOG_SL(LOG_SECTION_PIECE, L_DEBUG, "Fetching normal for vertex %d", vertexIndex);
const aiVector3D& aiNormal = mesh->mNormals[vertexIndex];
if (!IS_QNAN(aiNormal)) {
vertex.normal = aiVectorToFloat3(aiNormal);
}
// vertex tangent, x is positive in texture axis
if (mesh->HasTangentsAndBitangents()) {
LOG_SL(LOG_SECTION_PIECE, L_DEBUG, "Fetching tangent for vertex %d", vertexIndex);
const aiVector3D& aiTangent = mesh->mTangents[vertexIndex];
const aiVector3D& aiBitangent = mesh->mBitangents[vertexIndex];
vertex.sTangent = aiVectorToFloat3(aiTangent);
vertex.tTangent = aiVectorToFloat3(aiBitangent);
}
// vertex tex-coords per channel
for (unsigned int uvChanIndex = 0; uvChanIndex < NUM_MODEL_UVCHANNS; uvChanIndex++) {
if (!mesh->HasTextureCoords(uvChanIndex))
break;
piece->SetNumTexCoorChannels(uvChanIndex + 1);
vertex.texCoords[uvChanIndex].x = mesh->mTextureCoords[uvChanIndex][vertexIndex].x;
vertex.texCoords[uvChanIndex].y = mesh->mTextureCoords[uvChanIndex][vertexIndex].y;
}
mesh_vertex_mapping.push_back(piece->vertices.size());
piece->vertices.push_back(vertex);
}
// extract face data
LOG_SL(LOG_SECTION_PIECE, L_DEBUG, "Processing faces for mesh %d (%d faces)", meshIndex, mesh->mNumFaces);
/*
* since aiProcess_SortByPType is being used,
* we're sure we'll get only 1 type here,
* so combination check isn't needed, also
* anything more complex than triangles is
* being split thanks to aiProcess_Triangulate
*/
for (unsigned faceIndex = 0; faceIndex < mesh->mNumFaces; ++faceIndex) {
const aiFace& face = mesh->mFaces[faceIndex];
// some models contain lines (mNumIndices == 2) which
// we cannot render and they would need a 2nd drawcall)
if (face.mNumIndices != 3)
continue;
for (unsigned vertexListID = 0; vertexListID < face.mNumIndices; ++vertexListID) {
const unsigned int vertexFaceIdx = face.mIndices[vertexListID];
const unsigned int vertexDrawIdx = mesh_vertex_mapping[vertexFaceIdx];
piece->vertexDrawIndices.push_back(vertexDrawIdx);
}
}
}
piece->SetHasGeometryData(!piece->vertices.empty());
}
void CAssParser::LoadPieceTransformations(
SAssPiece* piece,
const S3DModel* model,
const aiNode* pieceNode,
const LuaTable& pieceTable
) {
aiVector3D aiScaleVec, aiTransVec;
aiQuaternion aiRotateQuat;
// process transforms
pieceNode->mTransformation.Decompose(aiScaleVec, aiRotateQuat, aiTransVec);
// metadata-scaling
piece->scales = pieceTable.GetFloat3("scale", aiVectorToFloat3(aiScaleVec));
piece->scales.x = pieceTable.GetFloat("scalex", piece->scales.x);
piece->scales.y = pieceTable.GetFloat("scaley", piece->scales.y);
piece->scales.z = pieceTable.GetFloat("scalez", piece->scales.z);
if (piece->scales.x != piece->scales.y || piece->scales.y != piece->scales.z) {
// LOG_SL(LOG_SECTION_MODEL, L_WARNING, "Spring doesn't support non-uniform scaling");
piece->scales.y = piece->scales.x;
piece->scales.z = piece->scales.x;
}
// metadata-translation
piece->offset = pieceTable.GetFloat3("offset", aiVectorToFloat3(aiTransVec));
piece->offset.x = pieceTable.GetFloat("offsetx", piece->offset.x);
piece->offset.y = pieceTable.GetFloat("offsety", piece->offset.y);
piece->offset.z = pieceTable.GetFloat("offsetz", piece->offset.z);
// metadata-rotation
// NOTE:
// these rotations are "pre-scripting" but "post-modelling"
// together with the (baked) aiRotateQuad they determine the
// model's pose *before* any animations execute
//
// float3 rotAngles = pieceTable.GetFloat3("rotate", aiQuaternionToRadianAngles(aiRotateQuat) * RADTODEG);
float3 pieceRotAngles = pieceTable.GetFloat3("rotate", ZeroVector);
pieceRotAngles.x = pieceTable.GetFloat("rotatex", pieceRotAngles.x);
pieceRotAngles.y = pieceTable.GetFloat("rotatey", pieceRotAngles.y);
pieceRotAngles.z = pieceTable.GetFloat("rotatez", pieceRotAngles.z);
pieceRotAngles *= DEGTORAD;
LOG_SL(LOG_SECTION_PIECE, L_INFO,
"(%d:%s) Assimp offset (%f,%f,%f), rotate (%f,%f,%f,%f), scale (%f,%f,%f)",
model->numPieces, piece->name.c_str(),
aiTransVec.x, aiTransVec.y, aiTransVec.z,
aiRotateQuat.w, aiRotateQuat.x, aiRotateQuat.y, aiRotateQuat.z,
aiScaleVec.x, aiScaleVec.y, aiScaleVec.z
);
LOG_SL(LOG_SECTION_PIECE, L_INFO,
"(%d:%s) Relative offset (%f,%f,%f), rotate (%f,%f,%f), scale (%f,%f,%f)",
model->numPieces, piece->name.c_str(),
piece->offset.x, piece->offset.y, piece->offset.z,
pieceRotAngles.x, pieceRotAngles.y, pieceRotAngles.z,
piece->scales.x, piece->scales.y, piece->scales.z
);
// NOTE:
// at least collada (.dae) files generated by Blender represent
// a coordinate-system that differs from the "standard" formats
// (3DO, S3O, ...) for which existing tools at least have prior
// knowledge of Spring's expectations --> let the user override
// the ROOT rotational transform and the rotation-axis mapping
// used by animation scripts (but re-modelling/re-exporting is
// always preferred!) even though AssImp should convert models
// to its own system which matches that of Spring
//
// .dae : x=Rgt, y=-Fwd, z= Up, as=(-1, -1, 1), am=AXIS_XZY (if Z_UP)
// .dae : x=Rgt, y=-Fwd, z= Up, as=(-1, -1, 1), am=AXIS_XZY (if Y_UP) [!?]
// .blend: ????
piece->bakedRotMatrix = aiMatrixToMatrix(aiMatrix4x4t<float>(aiRotateQuat.GetMatrix()));
if (piece == model->GetRootPiece()) {
const float3 xaxis = pieceTable.GetFloat3("xaxis", piece->bakedRotMatrix.GetX());
const float3 yaxis = pieceTable.GetFloat3("yaxis", piece->bakedRotMatrix.GetY());
const float3 zaxis = pieceTable.GetFloat3("zaxis", piece->bakedRotMatrix.GetZ());
if (math::fabs(xaxis.SqLength() - yaxis.SqLength()) < 0.01f && math::fabs(yaxis.SqLength() - zaxis.SqLength()) < 0.01f) {
piece->bakedRotMatrix = CMatrix44f(ZeroVector, xaxis, yaxis, zaxis);
}
}
piece->rotAxisSigns = pieceTable.GetFloat3("rotAxisSigns", float3(-OnesVector));
piece->axisMapType = AxisMappingType(pieceTable.GetInt("rotAxisMap", AXIS_MAPPING_XYZ));
// construct 'baked' part of the piece-space matrix
// AssImp order is translate * rotate * scale * v;
// we leave the translation and scale parts out and
// put those in <offset> and <scales> --> transform
// is just R instead of T * R * S
//
// note: for all non-AssImp models this is identity!
//
piece->ComposeRotation(piece->bakedRotMatrix, pieceRotAngles);
piece->SetHasIdentityRotation(piece->bakedRotMatrix.IsIdentity() == 0);
assert(piece->bakedRotMatrix.IsOrthoNormal() == 0);
}
SAssPiece* CAssParser::LoadPiece(SAssModel* model, aiNode* node, const LuaTable& metaTable)
{
// Create new piece
++model->numPieces;
SAssPiece* piece = new SAssPiece;
piece->type = MODELTYPE_OTHER;
piece->node = node;
piece->isEmpty = (node->mNumMeshes == 0);
if (node->mParent) {
piece->name = std::string(node->mName.data);
} else {
//FIXME is this really smart?
piece->name = "root"; //! The real model root
}
// find a new name if none given or if a piece with the same name already exists
if (piece->name.empty()) {
piece->name = "piece";
}
ModelPieceMap::const_iterator it = model->pieces.find(piece->name);
if (it != model->pieces.end()) {
char buf[64];
int i = 0;
while (it != model->pieces.end()) {
SNPRINTF(buf, 64, "%s%02i", piece->name.c_str(), i++);
it = model->pieces.find(buf);
}
piece->name = buf;
}
LOG_S(LOG_SECTION_PIECE, "Converting node '%s' to piece '%s' (%d meshes).",
node->mName.data, piece->name.c_str(), node->mNumMeshes);
// Load additional piece properties from metadata
const LuaTable& pieceTable = metaTable.SubTable("pieces").SubTable(piece->name);
if (pieceTable.IsValid()) {
LOG_S(LOG_SECTION_PIECE, "Found metadata for piece '%s'",
piece->name.c_str());
}
// Load transforms
LoadPieceTransformations(model, piece, pieceTable);
// Update piece min/max extents
for (unsigned meshListIndex = 0; meshListIndex < node->mNumMeshes; meshListIndex++) {
const unsigned int meshIndex = node->mMeshes[meshListIndex];
const SAssModel::MinMax& minmax = model->mesh_minmax[meshIndex];
piece->mins = std::min(piece->mins, minmax.mins);
piece->maxs = std::max(piece->maxs, minmax.maxs);
}
// Check if piece is special (ie, used to set Spring model properties)
if (strcmp(node->mName.data, "SpringHeight") == 0) {
// Set the model height to this nodes Z value
if (!metaTable.KeyExists("height")) {
model->height = piece->offset.z;
LOG_S(LOG_SECTION_MODEL,
"Model height of %f set by special node 'SpringHeight'",
model->height);
}
--model->numPieces;
delete piece;
return NULL;
}
if (strcmp(node->mName.data, "SpringRadius") == 0) {
if (!metaTable.KeyExists("midpos")) {
model->relMidPos = piece->scaleRotMatrix.Mul(piece->offset);
LOG_S(LOG_SECTION_MODEL,
"Model midpos of (%f,%f,%f) set by special node 'SpringRadius'",
model->relMidPos.x, model->relMidPos.y, model->relMidPos.z);
}
if (!metaTable.KeyExists("radius")) {
if (piece->maxs.x <= 0.00001f) {
aiVector3D _scale, _offset;
aiQuaternion _rotate;
piece->node->mTransformation.Decompose(_scale,_rotate,_offset);
model->radius = aiVectorToFloat3(_scale).x; // the blender import script only sets the scale property
} else {
model->radius = piece->maxs.x; // use the transformed mesh extents
}
LOG_S(LOG_SECTION_MODEL,
"Model radius of %f set by special node 'SpringRadius'",
model->radius);
}
--model->numPieces;
delete piece;
return NULL;
}
//! Get vertex data from node meshes
for (unsigned meshListIndex = 0; meshListIndex < node->mNumMeshes; ++meshListIndex) {
unsigned int meshIndex = node->mMeshes[meshListIndex];
LOG_SL(LOG_SECTION_PIECE, L_DEBUG, "Fetching mesh %d from scene",
meshIndex);
const aiMesh* mesh = model->scene->mMeshes[meshIndex];
std::vector<unsigned> mesh_vertex_mapping;
// extract vertex data
LOG_SL(LOG_SECTION_PIECE, L_DEBUG,
"Processing vertices for mesh %d (%d vertices)",
meshIndex, mesh->mNumVertices);
LOG_SL(LOG_SECTION_PIECE, L_DEBUG,
"Normals: %s Tangents/Bitangents: %s TexCoords: %s",
(mesh->HasNormals() ? "Y" : "N"),
(mesh->HasTangentsAndBitangents() ? "Y" : "N"),
(mesh->HasTextureCoords(0) ? "Y" : "N"));
piece->vertices.reserve(piece->vertices.size() + mesh->mNumVertices);
for (unsigned vertexIndex = 0; vertexIndex < mesh->mNumVertices; ++vertexIndex) {
SAssVertex vertex;
// vertex coordinates
const aiVector3D& aiVertex = mesh->mVertices[vertexIndex];
vertex.pos = aiVectorToFloat3(aiVertex);
// vertex normal
LOG_SL(LOG_SECTION_PIECE, L_DEBUG, "Fetching normal for vertex %d",
vertexIndex);
const aiVector3D& aiNormal = mesh->mNormals[vertexIndex];
if (!IS_QNAN(aiNormal)) {
vertex.normal = aiVectorToFloat3(aiNormal);
}
// vertex tangent, x is positive in texture axis
if (mesh->HasTangentsAndBitangents()) {
LOG_SL(LOG_SECTION_PIECE, L_DEBUG,
"Fetching tangent for vertex %d", vertexIndex );
const aiVector3D& aiTangent = mesh->mTangents[vertexIndex];
const aiVector3D& aiBitangent = mesh->mBitangents[vertexIndex];
vertex.sTangent = aiVectorToFloat3(aiTangent);
vertex.tTangent = aiVectorToFloat3(aiBitangent);
}
// vertex texcoords
if (mesh->HasTextureCoords(0)) {
vertex.texCoord.x = mesh->mTextureCoords[0][vertexIndex].x;
vertex.texCoord.y = mesh->mTextureCoords[0][vertexIndex].y;
}
if (mesh->HasTextureCoords(1)) {
piece->hasTexCoord2 = true,
vertex.texCoord2.x = mesh->mTextureCoords[1][vertexIndex].x;
vertex.texCoord2.y = mesh->mTextureCoords[1][vertexIndex].y;
}
mesh_vertex_mapping.push_back(piece->vertices.size());
piece->vertices.push_back(vertex);
}
// extract face data
LOG_SL(LOG_SECTION_PIECE, L_DEBUG,
"Processing faces for mesh %d (%d faces)",
meshIndex, mesh->mNumFaces);
/*
* since aiProcess_SortByPType is being used,
* we're sure we'll get only 1 type here,
* so combination check isn't needed, also
* anything more complex than triangles is
* being split thanks to aiProcess_Triangulate
*/
piece->vertexDrawIndices.reserve(piece->vertexDrawIndices.size() + mesh->mNumFaces * 3);
for (unsigned faceIndex = 0; faceIndex < mesh->mNumFaces; ++faceIndex) {
const aiFace& face = mesh->mFaces[faceIndex];
// some models contain lines (mNumIndices == 2)
// we cannot render those (esp. they would need to be called in a 2nd drawcall)
if (face.mNumIndices != 3)
continue;
for (unsigned vertexListID = 0; vertexListID < face.mNumIndices; ++vertexListID) {
const unsigned int vertexFaceIdx = face.mIndices[vertexListID];
const unsigned int vertexDrawIdx = mesh_vertex_mapping[vertexFaceIdx];
piece->vertexDrawIndices.push_back(vertexDrawIdx);
}
}
}
piece->isEmpty = piece->vertices.empty();
//! Get parent name from metadata or model
if (pieceTable.KeyExists("parent")) {
piece->parentName = pieceTable.GetString("parent", "");
} else if (node->mParent) {
if (node->mParent->mParent) {
piece->parentName = std::string(node->mParent->mName.data);
} else { // my parent is the root, which gets renamed
piece->parentName = "root";
}
} else {
piece->parentName = "";
}
LOG_S(LOG_SECTION_PIECE, "Loaded model piece: %s with %d meshes",
piece->name.c_str(), node->mNumMeshes);
// Verbose logging of piece properties
LOG_S(LOG_SECTION_PIECE, "piece->name: %s", piece->name.c_str());
LOG_S(LOG_SECTION_PIECE, "piece->parent: %s", piece->parentName.c_str());
// Recursively process all child pieces
for (unsigned int i = 0; i < node->mNumChildren; ++i) {
LoadPiece(model, node->mChildren[i], metaTable);
}
model->pieces[piece->name] = piece;
return piece;
}
