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main.cpp
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main.cpp
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#define NOMINMAX
#include <cstdio>
#include <tinyusdz.hh>
#include <usdShade.hh>
#include <usdSkel.hh>
#include <usda-writer.hh>
#define TINYGLTF_IMPLEMENTATION
#include <tiny_gltf.h>
#define STB_IMAGE_IMPLEMENTATION
#define STB_IMAGE_WRITE_IMPLEMENTATION
#include <glm.hpp>
#include <gtc/quaternion.hpp>
#include <gtx/matrix_decompose.hpp>
#include <vector>
#include <queue>
#include <unordered_map>
#include <filesystem>
#include <crc64.h>
#include "Image.h"
namespace Mid
{
struct Material
{
std::string name;
bool double_sided = false;
bool useSpecularWorkflow = false;
glm::vec3 diffuse_color = glm::vec3(1.0f, 1.0f, 1.0f);
std::string diffuse_tex = "";
std::string diffuse_varname = "";
glm::vec3 emissive_color = glm::vec3(0.0f, 0.0f, 0.0f);
std::string emissive_tex = "";
glm::vec3 specular_color = glm::vec3(1.0f, 1.0f, 1.0f);
std::string specular_tex = "";
float metallic = 0.0f;
std::string metallic_tex = "";
float roughness = 0.5f;
std::string roughness_tex = "";
float opacity = 1.0f;
std::string opacity_tex = "";
std::string uvset = "";
int idx_diffuse_alpha = -1;
int idx_emissive = -1;
int idx_metallic_roughness = -1;
int idx_specular_glossiness = -1;
};
}
inline glm::mat4 mat_convert(const tinyusdz::value::matrix4d& mat)
{
glm::mat4 mat_row = *(glm::dmat4*)(&mat);
return glm::transpose(mat_row);
}
#if 1
int main(int argc, char* argv[])
{
if (argc < 3)
{
printf("usd2glb input.usdc output.glb\n");
return 0;
}
std::string path_model = std::filesystem::path(argv[1]).parent_path().u8string();
std::string warn;
std::string err;
tinyusdz::Stage stage;
tinyusdz::USDLoadOptions options;
options.load_assets = false;
bool ret = tinyusdz::LoadUSDCFromFile(argv[1], &stage, &warn, &err, options);
if (!ret)
{
printf("%s\n", warn.c_str());
printf("%s\n", err.c_str());
return 0;
}
// tinyusdz::usda::SaveAsUSDA("output.usda", stage, &warn, &err);
double time_codes_per_sec = stage.metas().timeCodesPerSecond.get_value();
auto upAxis = stage.metas().upAxis.get_value();
glm::quat axis_rot = glm::identity<glm::quat>();
if (upAxis == tinyusdz::Axis::X)
{
glm::mat4 rot = { 0.0f, 1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f, 1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f };
axis_rot = rot;
}
else if (upAxis == tinyusdz::Axis::Z)
{
glm::mat4 rot = { 0.0f, 0.0f, 1.0f, 0.0f, 1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f };
axis_rot = rot;
}
tinyusdz::Prim* root_prim = &stage.root_prims()[0];
tinygltf::Model m_out;
m_out.scenes.resize(1);
tinygltf::Scene& scene_out = m_out.scenes[0];
scene_out.name = "Scene";
m_out.asset.version = "2.0";
m_out.asset.generator = "tinygltf";
m_out.buffers.resize(1);
tinygltf::Buffer& buf_out = m_out.buffers[0];
size_t offset = 0;
size_t length = 0;
size_t view_id = 0;
size_t acc_id = 0;
std::vector<Mid::Material> material_lst;
std::unordered_map<std::string, int> material_map;
struct Prim
{
tinyusdz::Prim* prim;
int id_node_base = -1;
std::string base_path;
int idx_material = -1;
std::string skel_path;
};
std::queue<Prim> queue_prim;
bool specular_used = false;
queue_prim.push({ root_prim, -1, "" });
while (!queue_prim.empty())
{
Prim prim = queue_prim.front();
queue_prim.pop();
std::string path = prim.base_path + "/" + prim.prim->element_path().full_path_name();
if (prim.prim->data().type_id() == tinyusdz::value::TYPE_ID_MATERIAL)
{
Mid::Material material_mid;
auto* material_in = prim.prim->data().as<tinyusdz::Material>();
material_mid.name = material_in->name;
std::string outputs_surface = material_in->surface->target.value().prim_part();
const tinyusdz::Prim* pshader0 = stage.GetPrimAtPath(tinyusdz::Path(outputs_surface, "")).value();
auto* shader0 = pshader0->data().as<tinyusdz::Shader>();
auto* surface = shader0->value.as<tinyusdz::UsdPreviewSurface>();
int useSpecularWorkflow;
surface->useSpecularWorkflow.get_value().get_scalar(&useSpecularWorkflow);
material_mid.useSpecularWorkflow = useSpecularWorkflow != 0;
specular_used = specular_used || material_mid.useSpecularWorkflow;
{
auto diffuse = surface->diffuseColor;
auto diffuse_connection = diffuse.get_connection();
if (diffuse_connection.has_value())
{
std::string path = diffuse_connection.value().prim_part();
const tinyusdz::Prim* pshader1 = stage.GetPrimAtPath(tinyusdz::Path(path, "")).value();
auto* shader1 = pshader1->data().as<tinyusdz::Shader>();
if (shader1->value.type_id() == tinyusdz::value::TYPE_ID_IMAGING_UVTEXTURE)
{
auto* tex = shader1->value.as<tinyusdz::UsdUVTexture>();
tinyusdz::value::AssetPath file;
tex->file.get_value().value().get_scalar(&file);
material_mid.diffuse_tex = file.GetAssetPath();
auto uv_connection = tex->st.get_connection();
if (uv_connection.has_value())
{
std::string path_uv = uv_connection.value().prim_part();
const tinyusdz::Prim* pshader2 = stage.GetPrimAtPath(tinyusdz::Path(path_uv, "")).value();
auto* shader2 = pshader2->data().as<tinyusdz::Shader>();
auto* uvset = shader2->value.as<tinyusdz::UsdPrimvarReader_float2>();
tinyusdz::value::token token_uv;
uvset->varname.get_value().value().get_scalar(&token_uv);
material_mid.uvset = token_uv.str();
}
}
else if (shader1->value.type_id() == tinyusdz::value::TYPE_ID_IMAGING_PRIMVAR_READER_FLOAT3)
{
auto* reader = shader1->value.as<tinyusdz::UsdPrimvarReader_float3>();
tinyusdz::value::token varname;
reader->varname.get_value().value().get_scalar(&varname);
material_mid.diffuse_varname = varname.str();
}
material_mid.diffuse_color = { 1.0f, 1.0f, 1.0f };
}
else
{
tinyusdz::value::color3f col;
diffuse.get_value().get_scalar(&col);
material_mid.diffuse_color = { col[0], col[1], col[2] };
}
}
{
auto emissive = surface->emissiveColor;
auto emissive_connection = emissive.get_connection();
if (emissive_connection.has_value())
{
std::string path = emissive_connection.value().prim_part();
const tinyusdz::Prim* pshader1 = stage.GetPrimAtPath(tinyusdz::Path(path, "")).value();
auto* shader1 = pshader1->data().as<tinyusdz::Shader>();
auto* tex = shader1->value.as<tinyusdz::UsdUVTexture>();
tinyusdz::value::AssetPath file;
tex->file.get_value().value().get_scalar(&file);
material_mid.emissive_tex = file.GetAssetPath();
auto uv_connection = tex->st.get_connection();
if (uv_connection.has_value())
{
std::string path_uv = uv_connection.value().prim_part();
const tinyusdz::Prim* pshader2 = stage.GetPrimAtPath(tinyusdz::Path(path_uv, "")).value();
auto* shader2 = pshader2->data().as<tinyusdz::Shader>();
auto* uvset = shader2->value.as<tinyusdz::UsdPrimvarReader_float2>();
tinyusdz::value::token token_uv;
uvset->varname.get_value().value().get_scalar(&token_uv);
material_mid.uvset = token_uv.str();
}
material_mid.emissive_color = { 1.0f, 1.0f, 1.0f };
}
else
{
tinyusdz::value::color3f col;
emissive.get_value().get_scalar(&col);
material_mid.emissive_color = { col[0], col[1], col[2] };
}
}
if (material_mid.useSpecularWorkflow)
{
auto specular = surface->specularColor;
auto specular_connection = specular.get_connection();
if (specular_connection.has_value())
{
std::string path = specular_connection.value().prim_part();
const tinyusdz::Prim* pshader1 = stage.GetPrimAtPath(tinyusdz::Path(path, "")).value();
auto* shader1 = pshader1->data().as<tinyusdz::Shader>();
auto* tex = shader1->value.as<tinyusdz::UsdUVTexture>();
tinyusdz::value::AssetPath file;
tex->file.get_value().value().get_scalar(&file);
material_mid.specular_tex = file.GetAssetPath();
auto uv_connection = tex->st.get_connection();
if (uv_connection.has_value())
{
std::string path_uv = uv_connection.value().prim_part();
const tinyusdz::Prim* pshader2 = stage.GetPrimAtPath(tinyusdz::Path(path_uv, "")).value();
auto* shader2 = pshader2->data().as<tinyusdz::Shader>();
auto* uvset = shader2->value.as<tinyusdz::UsdPrimvarReader_float2>();
tinyusdz::value::token token_uv;
uvset->varname.get_value().value().get_scalar(&token_uv);
material_mid.uvset = token_uv.str();
}
material_mid.specular_color = { 1.0f, 1.0f, 1.0f };
}
else
{
tinyusdz::value::color3f col;
specular.get_value().get_scalar(&col);
material_mid.specular_color = { col[0], col[1], col[2] };
}
}
else
{
auto metallic = surface->metallic;
auto metallic_connection = metallic.get_connection();
if (metallic_connection.has_value())
{
std::string path = metallic_connection.value().prim_part();
const tinyusdz::Prim* pshader1 = stage.GetPrimAtPath(tinyusdz::Path(path, "")).value();
auto* shader1 = pshader1->data().as<tinyusdz::Shader>();
auto* tex = shader1->value.as<tinyusdz::UsdUVTexture>();
tinyusdz::value::AssetPath file;
tex->file.get_value().value().get_scalar(&file);
material_mid.metallic_tex = file.GetAssetPath();
material_mid.metallic = 1.0f;
auto uv_connection = tex->st.get_connection();
if (uv_connection.has_value())
{
std::string path_uv = uv_connection.value().prim_part();
const tinyusdz::Prim* pshader2 = stage.GetPrimAtPath(tinyusdz::Path(path_uv, "")).value();
auto* shader2 = pshader2->data().as<tinyusdz::Shader>();
auto* uvset = shader2->value.as<tinyusdz::UsdPrimvarReader_float2>();
tinyusdz::value::token token_uv;
uvset->varname.get_value().value().get_scalar(&token_uv);
material_mid.uvset = token_uv.str();
}
}
else
{
metallic.get_value().get_scalar(&material_mid.metallic);
}
}
{
auto roughness = surface->roughness;
auto roughness_connection = roughness.get_connection();
if (roughness_connection.has_value())
{
std::string path = roughness_connection.value().prim_part();
const tinyusdz::Prim* pshader1 = stage.GetPrimAtPath(tinyusdz::Path(path, "")).value();
auto* shader1 = pshader1->data().as<tinyusdz::Shader>();
auto* tex = shader1->value.as<tinyusdz::UsdUVTexture>();
tinyusdz::value::AssetPath file;
tex->file.get_value().value().get_scalar(&file);
material_mid.roughness_tex = file.GetAssetPath();
material_mid.roughness = 1.0f;
auto uv_connection = tex->st.get_connection();
if (uv_connection.has_value())
{
std::string path_uv = uv_connection.value().prim_part();
const tinyusdz::Prim* pshader2 = stage.GetPrimAtPath(tinyusdz::Path(path_uv, "")).value();
auto* shader2 = pshader2->data().as<tinyusdz::Shader>();
auto* uvset = shader2->value.as<tinyusdz::UsdPrimvarReader_float2>();
tinyusdz::value::token token_uv;
uvset->varname.get_value().value().get_scalar(&token_uv);
material_mid.uvset = token_uv.str();
}
}
else
{
roughness.get_value().get_scalar(&material_mid.roughness);
}
}
{
auto opacity = surface->opacity;
auto opacity_connection = opacity.get_connection();
if (opacity_connection.has_value())
{
std::string path = opacity_connection.value().prim_part();
const tinyusdz::Prim* pshader1 = stage.GetPrimAtPath(tinyusdz::Path(path, "")).value();
auto* shader1 = pshader1->data().as<tinyusdz::Shader>();
auto* tex = shader1->value.as<tinyusdz::UsdUVTexture>();
tinyusdz::value::AssetPath file;
tex->file.get_value().value().get_scalar(&file);
material_mid.opacity_tex = file.GetAssetPath();
material_mid.opacity = 1.0f;
auto uv_connection = tex->st.get_connection();
if (uv_connection.has_value())
{
std::string path_uv = uv_connection.value().prim_part();
const tinyusdz::Prim* pshader2 = stage.GetPrimAtPath(tinyusdz::Path(path_uv, "")).value();
auto* shader2 = pshader2->data().as<tinyusdz::Shader>();
auto* uvset = shader2->value.as<tinyusdz::UsdPrimvarReader_float2>();
tinyusdz::value::token token_uv;
uvset->varname.get_value().value().get_scalar(&token_uv);
material_mid.uvset = token_uv.str();
}
}
else
{
opacity.get_value().get_scalar(&material_mid.opacity);
}
}
int idx = (int)material_lst.size();
material_lst.push_back(material_mid);
material_map[path] = idx;
}
if (prim.prim->data().type_id() != tinyusdz::value::TYPE_ID_MATERIAL
&& prim.prim->data().type_id() != tinyusdz::value::TYPE_ID_GEOM_MESH)
{
size_t num_children = prim.prim->children().size();
for (size_t i = 0; i < num_children; i++)
{
queue_prim.push({ &prim.prim->children()[i], -1, path });
}
}
}
if (specular_used)
{
m_out.extensionsUsed.push_back("KHR_materials_pbrSpecularGlossiness");
}
std::unordered_map<std::string, int> joint_map;
std::unordered_map<int, std::string> node_skin_map;
std::unordered_map<std::string, int> skin_map;
struct MorphIdx
{
int node_idx;
int morph_idx;
};
std::unordered_map<std::string, std::vector<MorphIdx>> morph_map;
std::unordered_map<int, int> target_counts;
queue_prim.push({ root_prim, -1, "" });
while (!queue_prim.empty())
{
Prim prim = queue_prim.front();
queue_prim.pop();
std::string path = prim.base_path + "/" + prim.prim->element_path().full_path_name();
if (prim.prim->data().type_id() == tinyusdz::value::TYPE_ID_GEOM_XFORM)
{
auto* node_in = prim.prim->data().as<tinyusdz::Xform>();
if (node_in->materialBinding.has_value())
{
std::string material_path = node_in->materialBinding.value().targetPath.full_path_name();
prim.idx_material = material_map[material_path];
}
int node_id = (int)m_out.nodes.size();
tinygltf::Node node_out;
node_out.name = node_in->name;
tinyusdz::value::matrix4d matrix;
node_in->EvaluateXformOps(0.0, tinyusdz::value::TimeSampleInterpolationType::Linear, &matrix, nullptr, nullptr);
glm::mat4 mat = mat_convert(matrix);
glm::vec3 scale;
glm::quat rotation;
glm::vec3 translation;
glm::vec3 skew;
glm::vec4 persp;
glm::decompose(mat, scale, rotation, translation, skew, persp);
node_out.translation = { translation.x, translation.y, translation.z };
node_out.rotation = { rotation.x, rotation.y, rotation.z, rotation.w };
node_out.scale = { scale.x, scale.y, scale.z };
m_out.nodes.push_back(node_out);
if (prim.id_node_base >= 0)
{
m_out.nodes[prim.id_node_base].children.push_back(node_id);
}
else
{
rotation = axis_rot * rotation;
node_out.rotation = { rotation.x, rotation.y, rotation.z, rotation.w };
scene_out.nodes.push_back(node_id);
}
prim.id_node_base = node_id;
}
else if (prim.prim->data().type_id() == tinyusdz::value::TYPE_ID_SKEL_ROOT)
{
auto* node_in = prim.prim->data().as<tinyusdz::SkelRoot>();
int node_id = (int)m_out.nodes.size();
{
auto iter = node_in->props.find("skel:skeleton");
if (iter != node_in->props.end())
{
prim.skel_path = iter->second.get_relationship().targetPath.full_path_name();
}
}
tinygltf::Node node_out;
node_out.name = node_in->name;
for (size_t i = 0; i < node_in->xformOps.size(); i++)
{
auto& op = node_in->xformOps[i];
if (op.op_type == tinyusdz::XformOp::OpType::Transform)
{
auto* matrix = op.get_scalar().value().as<tinyusdz::value::matrix4d>();
glm::mat4 mat = mat_convert(*matrix);
glm::vec3 scale;
glm::quat rotation;
glm::vec3 translation;
glm::vec3 skew;
glm::vec4 persp;
glm::decompose(mat, scale, rotation, translation, skew, persp);
rotation = axis_rot * rotation;
node_out.translation = { translation.x, translation.y, translation.z };
node_out.rotation = { rotation.x, rotation.y, rotation.z, rotation.w };
node_out.scale = { scale.x, scale.y, scale.z };
m_out.nodes.push_back(node_out);
scene_out.nodes.push_back(node_id);
prim.id_node_base = node_id;
break;
}
}
}
else if (prim.prim->data().type_id() == tinyusdz::value::TYPE_ID_GEOM_MESH)
{
auto* mesh_in = prim.prim->data().as<tinyusdz::GeomMesh>();
bool leftHand = false;
if (mesh_in->orientation.get_value() == tinyusdz::Orientation::LeftHanded)
{
leftHand = true;
}
if (mesh_in->materialBinding.has_value())
{
std::string material_path = mesh_in->materialBinding.value().targetPath.full_path_name();
prim.idx_material = material_map[material_path];
}
int node_id = (int)m_out.nodes.size();
int mesh_id = (int)m_out.meshes.size();
tinygltf::Node node_out;
node_out.name = mesh_in->name;
node_out.mesh = mesh_id;
m_out.nodes.push_back(node_out);
if (prim.id_node_base >= 0)
{
m_out.nodes[prim.id_node_base].children.push_back(node_id);
}
else
{
node_out.rotation = { axis_rot.x, axis_rot.y, axis_rot.z, axis_rot.w };
scene_out.nodes.push_back(node_id);
}
prim.id_node_base = node_id;
tinygltf::Mesh mesh_out;
mesh_out.name = node_out.name;
mesh_out.primitives.resize(1);
auto& prim_out = mesh_out.primitives[0];
std::vector<tinyusdz::value::point3f> points_in;
std::vector<tinyusdz::value::normal3f> norms_in;
std::vector<std::vector<tinyusdz::value::vector3f>> offsets_in;
std::vector<std::vector<tinyusdz::value::vector3f>> norm_offsets_in;
std::vector<bool> target_sparse;
std::vector<std::vector<bool>> non_zeros_in;
std::vector<glm::u8vec4> conv_ji_in;
std::vector<glm::vec4> conv_jw_in;
std::vector<int> faceVertexIndices;
std::vector<int> faceVertexCounts;
std::vector<glm::ivec3> faces;
bool uv_indp_indices = false;
std::vector<tinyusdz::value::float2> uv_in;
std::vector<int> uv_indices_in;
int idx_material = prim.idx_material;
if (idx_material == -1)
{
idx_material = (int)material_lst.size();
Mid::Material material_mid;
auto iter = mesh_in->props.find("primvars:displayColor");
if (iter != mesh_in->props.end())
{
auto col = iter->second.get_attribute().get_value<std::vector<tinyusdz::value::float3>>().value()[0];
material_mid.diffuse_color = { col[0], col[1], col[2] };
}
material_lst.push_back(material_mid);
prim.idx_material = idx_material;
}
else
{
Mid::Material material_mid = material_lst[idx_material];
auto iter = mesh_in->props.find("primvars:"+ material_mid.diffuse_varname);
if (iter != mesh_in->props.end())
{
auto col = iter->second.get_attribute().get_value<std::vector<tinyusdz::value::float3>>().value()[0];
material_mid.diffuse_color = { col[0], col[1], col[2] };
idx_material = (int)material_lst.size();
material_lst.push_back(material_mid);
prim.idx_material = idx_material;
}
}
Mid::Material& material_mid = material_lst[idx_material];
material_mid.double_sided = mesh_in->doubleSided.get_value();
prim_out.material = idx_material;
mesh_in->points.get_value().value().get_scalar(&points_in);
tinyusdz::Extent extent;
mesh_in->extent.get_value().value().get_scalar(&extent);
if (mesh_in->normals.get_value().has_value())
{
mesh_in->normals.get_value().value().get_scalar(&norms_in);
}
mesh_in->faceVertexIndices.get_value().value().get_scalar(&faceVertexIndices);
mesh_in->faceVertexCounts.get_value().value().get_scalar(&faceVertexCounts);
{
std::string var_name_uvset = std::string("primvars:") + material_mid.uvset;
auto iter = mesh_in->props.find(var_name_uvset);
if (iter != mesh_in->props.end())
{
uv_in = iter->second.get_attribute().get_value<std::vector<tinyusdz::value::float2>>().value();
auto interpo = iter->second.get_attribute().metas().interpolation.value();
uv_indp_indices = interpo == tinyusdz::Interpolation::FaceVarying;
std::string var_name_uv_indices = std::string("primvars:") + material_mid.uvset + ":indices";
auto iter2 = mesh_in->props.find(var_name_uv_indices);
if (iter2 != mesh_in->props.end())
{
uv_indices_in = iter2->second.get_attribute().get_value<std::vector<int>>().value();
}
}
}
{
auto iter_ji = mesh_in->props.find("primvars:skel:jointIndices");
auto iter_jw = mesh_in->props.find("primvars:skel:jointWeights");
if (iter_ji != mesh_in->props.end() && iter_jw != mesh_in->props.end())
{
if (mesh_in->skeleton.has_value())
{
prim.skel_path = mesh_in->skeleton.value().targetPath.full_path_name();
}
node_skin_map[node_id] = prim.skel_path;
unsigned elem_size = iter_ji->second.get_attribute().metas().elementSize.value();
bool constant_joints = iter_ji->second.get_attribute().metas().interpolation.value() == tinyusdz::Interpolation::Constant;
auto ji = iter_ji->second.get_attribute().get_value<std::vector<int>>().value();
auto jw = iter_jw->second.get_attribute().get_value<std::vector<float>>().value();
size_t count = ji.size() / elem_size;
if (constant_joints)
{
count = points_in.size();
conv_ji_in.resize(count, { 0,0,0,0 });
conv_jw_in.resize(count, { 0.0f, 0.0f, 0.0f, 0.0f });
for (size_t i = 0; i < count; i++)
{
unsigned elems = 4;
if (elem_size < elems) elems = elem_size;
for (unsigned j = 0; j < elems; j++)
{
conv_ji_in[i][j] = (uint8_t)ji[j];
conv_jw_in[i][j] = jw[j];
}
}
}
else
{
conv_ji_in.resize(count, { 0,0,0,0 });
conv_jw_in.resize(count, { 0.0f, 0.0f, 0.0f, 0.0f });
for (size_t i = 0; i < count; i++)
{
unsigned elems = 4;
if (elem_size < elems) elems = elem_size;
for (unsigned j = 0; j < elems; j++)
{
size_t idx = elem_size * i + j;
conv_ji_in[i][j] = (uint8_t)ji[idx];
conv_jw_in[i][j] = jw[idx];
}
}
}
}
}
{
auto iter = mesh_in->props.find("skel:blendShapeTargets");
if (iter != mesh_in->props.end())
{
auto paths = iter->second.get_relationship().targetPathVector;
auto iter2 = mesh_in->props.find("skel:blendShapes");
auto names = iter2->second.get_attribute().get_value<std::vector<tinyusdz::Token>>().value();
size_t num_morphs = paths.size();
offsets_in.resize(num_morphs);
norm_offsets_in.resize(num_morphs);
target_sparse.resize(num_morphs, false);
non_zeros_in.resize(num_morphs);
target_counts[node_id] = (int)num_morphs;
for (size_t i = 0; i < num_morphs; i++)
{
std::string name = names[i].str();
morph_map[name].push_back({ node_id, (int)i });
const tinyusdz::Prim* primbs = stage.GetPrimAtPath(paths[i]).value();
auto* bs = primbs->data().as<tinyusdz::BlendShape>();
std::vector<tinyusdz::value::vector3f> offsets = bs->offsets.get_value().value();
offsets_in[i].resize(points_in.size());
std::vector<tinyusdz::value::vector3f> normOffsets;
if (norms_in.size() > 0)
{
normOffsets = bs->normalOffsets.get_value().value();
norm_offsets_in[i].resize(norms_in.size());
}
non_zeros_in[i].resize(points_in.size(), false);
if (bs->pointIndices.get_value().has_value())
{
target_sparse[i] = true;
auto pointIndices = bs->pointIndices.get_value().value();
size_t num_points = pointIndices.size();
for (size_t j = 0; j < num_points; j++)
{
int idx = pointIndices[j];
offsets_in[i][idx] = offsets[j];
if (normOffsets.size() > 0)
{
norm_offsets_in[i][idx] = normOffsets[j];
}
non_zeros_in[i][idx] = true;
}
}
else
{
target_sparse[i] = false;
for (size_t j = 0; j < points_in.size(); j++)
{
offsets_in[i][j] = offsets[j];
if (normOffsets.size() > 0)
{
norm_offsets_in[i][j] = normOffsets[j];
}
non_zeros_in[i][j] = true;
}
}
}
}
}
if (uv_indp_indices)
{
struct PointIn
{
int ind_pnt;
tinyusdz::value::float2 uv;
};
std::vector<tinyusdz::value::point3f> points_out;
std::vector<tinyusdz::value::normal3f> norms_out;
std::vector<std::vector<tinyusdz::value::vector3f>> offsets_out;
std::vector<std::vector<tinyusdz::value::vector3f>> norm_offsets_out;
std::vector<std::vector<bool>> non_zeros_out;
std::vector<glm::u8vec4> conv_ji_out;
std::vector<glm::vec4> conv_jw_out;
std::vector<tinyusdz::value::float2> uv_out;
std::unordered_map<uint64_t, int> points_map;
std::vector<int> faceVertexIndices_out(faceVertexIndices.size());
size_t num_targets = offsets_in.size();
if (num_targets > 0)
{
offsets_out.resize(num_targets);
norm_offsets_out.resize(num_targets);
non_zeros_out.resize(num_targets);
}
for (size_t i = 0; i < faceVertexIndices.size(); i++)
{
PointIn pnt;
pnt.ind_pnt = faceVertexIndices[i];
if (uv_indices_in.size() > 0)
{
int idx_uv = uv_indices_in[i];
pnt.uv = uv_in[idx_uv];
}
else
{
pnt.uv = uv_in[i];
}
uint64_t hash = crc64(0, (unsigned char*)&pnt, sizeof(pnt));
auto iter = points_map.find(hash);
if (iter != points_map.end())
{
faceVertexIndices_out[i] = iter->second;
}
else
{
int idx_out = (int)points_out.size();
points_out.push_back(points_in[pnt.ind_pnt]);
if (norms_in.size() > 0)
{
norms_out.push_back(norms_in[pnt.ind_pnt]);
}
if (num_targets > 0)
{
for (size_t j = 0; j < num_targets; j++)
{
offsets_out[j].push_back(offsets_in[j][pnt.ind_pnt]);
if (norm_offsets_in[j].size() > 0)
{
norm_offsets_out[j].push_back(norm_offsets_in[j][pnt.ind_pnt]);
}
non_zeros_out[j].push_back(non_zeros_in[j][pnt.ind_pnt]);
}
}
if (conv_ji_in.size() > 0)
{
conv_ji_out.push_back(conv_ji_in[pnt.ind_pnt]);
conv_jw_out.push_back(conv_jw_in[pnt.ind_pnt]);
}
uv_out.push_back(pnt.uv);
faceVertexIndices_out[i] = idx_out;
}
}
size_t idx_ind = 0;
for (size_t i = 0; i < faceVertexCounts.size(); i++)
{
int count = faceVertexCounts[i];
if (count == 3)
{
glm::ivec3 face;
if (leftHand)
{
face.z = faceVertexIndices_out[idx_ind]; idx_ind++;
face.y = faceVertexIndices_out[idx_ind]; idx_ind++;
face.x = faceVertexIndices_out[idx_ind]; idx_ind++;
}
else
{
face.x = faceVertexIndices_out[idx_ind]; idx_ind++;
face.y = faceVertexIndices_out[idx_ind]; idx_ind++;
face.z = faceVertexIndices_out[idx_ind]; idx_ind++;
}
faces.push_back(face);
}
else if (count == 4)
{
glm::ivec3 face1;
if (leftHand)
{
face1.z = faceVertexIndices_out[idx_ind]; idx_ind++;
face1.y = faceVertexIndices_out[idx_ind]; idx_ind++;
face1.x = faceVertexIndices_out[idx_ind]; idx_ind++;
}
else
{
face1.x = faceVertexIndices_out[idx_ind]; idx_ind++;
face1.y = faceVertexIndices_out[idx_ind]; idx_ind++;
face1.z = faceVertexIndices_out[idx_ind]; idx_ind++;
}
faces.push_back(face1);
glm::ivec3 face2;
face2.x = face1.z;
face2.y = faceVertexIndices_out[idx_ind]; idx_ind++;
face2.z = face1.x;
faces.push_back(face2);
}
}
offset = buf_out.data.size();
length = points_out.size() * sizeof(glm::vec3);
buf_out.data.resize(offset + length);
memcpy(buf_out.data.data() + offset, points_out.data(), length);
view_id = m_out.bufferViews.size();
{
tinygltf::BufferView view;
view.buffer = 0;
view.byteOffset = offset;
view.byteLength = length;
view.target = TINYGLTF_TARGET_ARRAY_BUFFER;
m_out.bufferViews.push_back(view);
}
acc_id = m_out.accessors.size();
{
tinygltf::Accessor acc;
acc.bufferView = view_id;
acc.byteOffset = 0;
acc.type = TINYGLTF_TYPE_VEC3;
acc.componentType = TINYGLTF_COMPONENT_TYPE_FLOAT;
acc.count = points_out.size();
acc.minValues = { extent.lower[0], extent.lower[1], extent.lower[2] };
acc.maxValues = { extent.upper[0], extent.upper[1], extent.upper[2] };
m_out.accessors.push_back(acc);
}
prim_out.attributes["POSITION"] = acc_id;
if (norms_out.size() > 0)
{
offset = buf_out.data.size();
length = norms_out.size() * sizeof(glm::vec3);
buf_out.data.resize(offset + length);
memcpy(buf_out.data.data() + offset, norms_out.data(), length);
view_id = m_out.bufferViews.size();
{
tinygltf::BufferView view;
view.buffer = 0;
view.byteOffset = offset;
view.byteLength = length;
view.target = TINYGLTF_TARGET_ARRAY_BUFFER;
m_out.bufferViews.push_back(view);
}
acc_id = m_out.accessors.size();
{
tinygltf::Accessor acc;
acc.bufferView = view_id;
acc.byteOffset = 0;
acc.type = TINYGLTF_TYPE_VEC3;
acc.componentType = TINYGLTF_COMPONENT_TYPE_FLOAT;
acc.count = norms_out.size();
m_out.accessors.push_back(acc);
}
prim_out.attributes["NORMAL"] = acc_id;
}
offset = buf_out.data.size();
length = faces.size() * sizeof(glm::ivec3);
buf_out.data.resize(offset + length);
memcpy(buf_out.data.data() + offset, faces.data(), length);
view_id = m_out.bufferViews.size();
{
tinygltf::BufferView view;
view.buffer = 0;
view.byteOffset = offset;
view.byteLength = length;
view.target = TINYGLTF_TARGET_ELEMENT_ARRAY_BUFFER;
m_out.bufferViews.push_back(view);
}
acc_id = m_out.accessors.size();
{
tinygltf::Accessor acc;
acc.bufferView = view_id;
acc.byteOffset = 0;
acc.type = TINYGLTF_TYPE_SCALAR;
acc.componentType = TINYGLTF_COMPONENT_TYPE_UNSIGNED_INT;
acc.count = faces.size() * 3;
m_out.accessors.push_back(acc);
}
prim_out.indices = acc_id;
if (num_targets > 0)
{
prim_out.targets.resize(num_targets);
for (int lChannelIndex = 0; lChannelIndex < num_targets; ++lChannelIndex)
{
bool is_sparse = target_sparse[lChannelIndex];
auto& offsets = offsets_out[lChannelIndex];
auto& norm_offsets = norm_offsets_out[lChannelIndex];
auto& non_zeros = non_zeros_out[lChannelIndex];
size_t num_pos = points_out.size();
{
std::vector<int> indices;
std::vector<glm::vec3> delta_pos;
glm::vec3 min_pos = { 0.0f, 0.0f, 0.0f };
glm::vec3 max_pos = { 0.0f, 0.0f, 0.0f };
for (int k = 0; k < num_pos; k++)
{
if (non_zeros[k])