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Copy pathusd_importer.cpp
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usd_importer.cpp
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// Harfang Framework - Copyright 2001-2023 Thomas Simonnet. All Rights Reserved.
// USD format importer.
#define NOMINMAX
#include <engine/geometry.h>
#include <engine/model_builder.h>
#include <engine/node.h>
#include <engine/physics.h>
#include <engine/render_pipeline.h>
#include <engine/scene.h>
#include <engine/forward_pipeline.h>
#include <foundation/build_info.h>
#include <foundation/cext.h>
#include <foundation/cmd_line.h>
#include <foundation/dir.h>
#include <foundation/format.h>
#include <foundation/log.h>
#include <foundation/math.h>
#include <foundation/matrix3.h>
#include <foundation/matrix4.h>
#include <foundation/pack_float.h>
#include <foundation/path_tools.h>
#include <foundation/projection.h>
#include <foundation/sha1.h>
#include <foundation/string.h>
#include <foundation/time.h>
#include <foundation/vector3.h>
#include <engine/create_geometry.h>
#include <fstream>
#include <iostream>
#include <mutex>
#undef CopyFile
#undef GetObject
#include <foundation/file.h>
#include "pxr/usd/usd/stage.h"
#include "pxr/usd/usd/primRange.h"
#include "pxr/usd/usd/attribute.h"
#include "pxr/usd/usdGeom/mesh.h"
#include "pxr/usd/usdGeom/xformable.h"
#include "pxr/usd/usdGeom/metrics.h"
#include "pxr/usd/usdGeom/camera.h"
#include "pxr/usd/usdGeom/sphere.h"
#include "pxr/usd/usdShade/materialBindingAPI.h"
#include "pxr/usd/ar/resolver.h"
#include "pxr/usd/ar/resolverContextBinder.h"
#include "pxr/usd/ar/asset.h"
#include "pxr/usd/ar/resolverContextBinder.h"
#include "pxr/usd/usdUtils/dependencies.h"
#include "pxr/usd/usd/primCompositionQuery.h"
#include "pxr/usd/usdLux/sphereLight.h"
#include "pxr/usd/usdLux/distantLight.h"
#include "pxr/usd/usdLux/domeLight.h"
#include "pxr/usd/usdHydra/tokens.h"
#include "pxr/usd/pcp/site.h"
#include "pxr/usd/pcp/layerStack.h"
#include "pxr/usd/sdf/layer.h"
#include "pxr/usd/sdf/fileFormat.h"
#include "pxr/usd/ar/packageUtils.h"
#include "pxr/base/gf/vec3f.h"
#include "pTexture.h"
#include "json.hpp"
using nlohmann::json;
std::map<int, hg::NodeRef> idNode_to_NodeRef;
std::map<std::string, hg::TextureRef> picture_dest_path_to_tex_ref;
std::map<std::string, std::string> picture_sha1_to_dest_path;
struct AlreadySavedGeo {
hg::Object object;
std::vector<std::string> ids;
};
std::map<std::string, AlreadySavedGeo> already_saved_geo_with_primitives_ids;
static std::string Indent(const int indent) {
std::string s;
for (int i = 0; i < indent; i++) {
s += " ";
}
return s;
}
enum class ImportPolicy { SkipExisting, Overwrite, Rename, SkipAlways };
struct Config {
ImportPolicy import_policy_geometry{ImportPolicy::SkipExisting}, import_policy_material{ImportPolicy::SkipExisting},
import_policy_texture{ImportPolicy::SkipExisting}, import_policy_scene{ImportPolicy::SkipExisting}, import_policy_anim{ImportPolicy::SkipExisting};
std::string input_path;
std::string name; // output name (may be empty)
std::string base_output_path{"./"};
std::string prj_path;
std::string prefix;
std::string shader;
float geometry_scale{1.f};
int frame_per_second{24};
bool import_animation{true};
bool recalculate_normal{false}, recalculate_tangent{false};
std::string finalizer_script;
};
static bool GetOutputPath(
std::string &path, const std::string &base, const std::string &name, const std::string &prefix, const std::string &ext, ImportPolicy import_policy) {
if (base.empty())
return false;
const auto filename = name.empty() ? prefix : (prefix.empty() ? name : prefix + "-" + name);
path = hg::CleanPath(base + "/" + filename + "." + ext);
// check folder exists and created
hg::MkTree(hg::CutFileName(path).c_str());
switch (import_policy) {
default:
return false;
case ImportPolicy::SkipAlways:
return false; // WARNING: Do not move this to the start of the function. The path for the resource is needed even if it is not exported.
case ImportPolicy::SkipExisting:
if (hg::Exists(path.c_str()))
return false;
break;
case ImportPolicy::Overwrite:
return true;
case ImportPolicy::Rename:
for (auto n = 0; hg::Exists(path.c_str()) && n < 10000; ++n) {
std::ostringstream ss;
ss << base << "/" << filename << "-" << std::setw(4) << std::setfill('0') << n << "." << ext;
path = ss.str();
}
break;
}
return true;
}
//
static std::string MakeRelativeResourceName(const std::string &name, const std::string &base_path, const std::string &prefix) {
if (hg::starts_with(name, base_path, hg::case_sensitivity::insensitive)) {
const auto stripped_name = hg::lstrip(hg::slice(name, base_path.length()), "/");
return prefix.empty() ? stripped_name : prefix + "/" + stripped_name;
}
return name;
}
//
static hg::Material ExportMaterial(const pxr::UsdShadeShader &shaderUSD, std::set<pxr::TfToken> &uvMapVarname, const pxr::UsdStage &stage,
const Config &config, hg::PipelineResources &resources) {
hg::debug(hg::format(" Exporting material '%1'").arg(shaderUSD.GetPath().GetString()));
static const std::string meta_BC5_text("{\"profiles\": {\"default\": {\"compression\": \"BC5\"}}}");
static const std::string meta_BC7_srgb_text("{\"profiles\": {\"default\": {\"compression\": \"BC7\", \"srgb\": 1}}}");
//
std::string dst_path;
hg::Material mat;
std::string shader("core/shader/pbr.hps");
hg::Vec4 diffuse = {0.5f, 0.5f, 0.5f, 1.f}, orm = {1, 0, 0, 1}, emissive = {0, 0, 0, -1}, specular = {0.5f, 0.5f, 0.5f, 1.f}, ambient = {0, 0, 0, 1};
hg::TextureRef albedoTexture, opacityTexture, occlusionTexture, roughnessTexture, metallicTexture;
// get all inputs
for (const auto &input : shaderUSD.GetInputs()) {
auto attrs = input.GetValueProducingAttributes();
if (attrs.size()) {
auto baseNameShaderInput = input.GetAttr().GetBaseName().GetString();
auto attr = attrs[0];
auto outputShaderName = attr.GetBaseName().GetString();
//auto y = attr.GetTypeName().GetCPPTypeName();
// if there is a real value
if (attr.HasAuthoredValue()) {
if (baseNameShaderInput == "diffuseColor") {
pxr::GfVec3f diffuseUSD;
attr.Get(&diffuseUSD);
diffuse.x = diffuseUSD.data()[0];
diffuse.y = diffuseUSD.data()[1];
diffuse.z = diffuseUSD.data()[2];
} else if (baseNameShaderInput == "opacity") {
attr.Get(&diffuse.w);
} else if (baseNameShaderInput == "occlusion") {
attr.Get(&orm.x);
} else if (baseNameShaderInput == "roughness") {
attr.Get(&orm.y);
} else if (baseNameShaderInput == "metallic") {
attr.Get(&orm.z);
} else if (baseNameShaderInput == "emissiveColor") {
pxr::GfVec3f emissiveUSD;
attr.Get(&emissiveUSD);
emissive.x = emissiveUSD.data()[0];
emissive.y = emissiveUSD.data()[1];
emissive.z = emissiveUSD.data()[2];
}
} else {
pxr::UsdShadeShader shaderTexture(attr.GetPrim());
pxr::ArResolverContextBinder resolverContextBinder(attr.GetPrim().GetStage()->GetPathResolverContext());
pxr::TfToken shaderID;
shaderTexture.GetShaderId(&shaderID);
// it's a texture
if (shaderID.GetString() == "UsdUVTexture") { // if (shaderID == pxr::UsdHydraTokens->HwUvTexture_1) { //|| shaderID == pxr::UsdHydraTokens->HwPtexTexture_1) {
for (const auto &inputTexture : shaderTexture.GetInputs()) {
auto baseNameTextureInput = inputTexture.GetBaseName().GetString();
auto attrTexture = inputTexture.GetAttr();
if (baseNameTextureInput == "file") {
auto y = attrTexture.GetTypeName().GetCPPTypeName();
// Retrieve the asset file.
pxr::SdfAssetPath assetPath;
attrTexture.Get(&assetPath);
GetOutputPath(dst_path, config.base_output_path + "/Textures", hg::GetFileName(assetPath.GetAssetPath()), {}, hg::GetFileExtension(assetPath.GetAssetPath()), config.import_policy_texture);
auto texRef = picture_dest_path_to_tex_ref[dst_path];
// Add the texture to the material.
if (baseNameShaderInput == "diffuseColor" && texRef != hg::InvalidTextureRef)
albedoTexture = texRef;
if (baseNameShaderInput == "opacity" && texRef != hg::InvalidTextureRef)
opacityTexture = texRef;
// Generate the ORM (Occlusion, Roughness, Metallic) using the available values.
if (baseNameShaderInput == "occlusion" && texRef != hg::InvalidTextureRef)
occlusionTexture = texRef;
if (baseNameShaderInput == "roughness" && texRef != hg::InvalidTextureRef)
roughnessTexture = texRef;
if (baseNameShaderInput == "metallic" && texRef != hg::InvalidTextureRef)
metallicTexture = texRef;
// Handle the normal texture.
if (baseNameShaderInput == "normal" && texRef != hg::InvalidTextureRef) {
hg::debug(hg::format(" - uNormalMap: %1").arg(resources.textures.GetName(texRef)));
if (GetOutputPath(dst_path, config.prj_path, resources.textures.GetName(texRef), {}, "meta", config.import_policy_texture)) {
if (std::FILE *f = std::fopen(dst_path.c_str(), "w")) {
std::fwrite(meta_BC5_text.data(), sizeof meta_BC5_text[0], meta_BC5_text.size(), f);
std::fclose(f);
}
}
mat.textures["uNormalMap"] = {texRef, 2};
}
// Handle the emissive texture.
if (baseNameShaderInput == "emissiveColor" && texRef != hg::InvalidTextureRef) {
hg::debug(hg::format(" - uSelfMap: %1").arg(resources.textures.GetName(texRef)));
if (GetOutputPath(dst_path, config.prj_path, resources.textures.GetName(texRef), {}, "meta", config.import_policy_texture)) {
if (std::FILE *f = std::fopen(dst_path.c_str(), "w")) {
std::fwrite(meta_BC7_srgb_text.data(), sizeof meta_BC7_srgb_text[0], meta_BC7_srgb_text.size(), f);
std::fclose(f);
}
}
mat.textures["uSelfMap"] = {texRef, 4};
}
} else if (baseNameTextureInput == "st") {
// Retrieve the source that is connected to the output.
auto sourceUV = inputTexture.GetConnectedSources()[0].source;
// Retrieve the shader where the output is located.
pxr::UsdShadeShader shaderUV(sourceUV.GetPrim());
// Retrieve the UV input.
auto inputUVName = shaderUV.GetInput(pxr::TfToken("varname"));
// If there's another connected source, update the inputUVName.
if (inputUVName.GetConnectedSources().size() > 0) {
auto UVNameSource = inputUVName.GetConnectedSources()[0].source;
inputUVName = UVNameSource.GetInput(pxr::TfToken("stPrimvarName"));
}
// Retrieve the token reference within the geometry.
pxr::TfToken UVName;
inputUVName.GetAttr().Get(&UVName);
uvMapVarname.insert(UVName);
}
}
}
}
} else {
hg::error(hg::format("!!! Can't find attr for %1").arg(input.GetFullName().GetString()));
}
}
// Check if there is an albedo.
if (albedoTexture != hg::InvalidTextureRef) {
hg::debug(hg::format(" - uBaseOpacityMap: %1").arg(resources.textures.GetName(albedoTexture)));
json preprocess;
if (opacityTexture != hg::InvalidTextureRef) {
preprocess = {"preprocess", {{"construct", {"R", "G", "B", {{"path", resources.textures.GetName(opacityTexture)}, {"channel", "A"}}}}}};
}
json meta_albedoTexture_json = {{"profiles", {{"default", {{"compression", "BC7"}, preprocess}}}}};
auto meta_albedoTexture = meta_albedoTexture_json.dump();
if (GetOutputPath(dst_path, config.prj_path, resources.textures.GetName(albedoTexture), {}, "meta", config.import_policy_texture)) {
if (std::FILE *f = std::fopen(dst_path.c_str(), "w")) {
std::fwrite(meta_albedoTexture.data(), sizeof meta_albedoTexture[0], meta_albedoTexture.size(), f);
std::fclose(f);
}
}
mat.textures["uBaseOpacityMap"] = {albedoTexture, 0};
}else // Check for cases where there is no albedo texture, but only opacity (e.g., for decals).
if (opacityTexture != hg::InvalidTextureRef) {
hg::debug(hg::format(" - uOpacityMap: %1").arg(resources.textures.GetName(opacityTexture)));
json meta_opacityTexture_json = {{"profiles", {{"default", {{"compression", "BC7"}, {"preprocess", {{"construct", {(int)(diffuse.x * 255), (int)(diffuse.y * 255), (int)(diffuse.z * 255), {{"path", resources.textures.GetName(opacityTexture)}, {"channel", "A"}}}}}}}}}}};
auto meta_opacityTexture = meta_opacityTexture_json.dump();
if (GetOutputPath(dst_path, config.prj_path, resources.textures.GetName(opacityTexture), {}, "meta", config.import_policy_texture)) {
if (std::FILE *f = std::fopen(dst_path.c_str(), "w")) {
std::fwrite(meta_opacityTexture.data(), sizeof meta_opacityTexture[0], meta_opacityTexture.size(), f);
std::fclose(f);
}
}
mat.textures["uBaseOpacityMap"] = {opacityTexture, 0};
}
// Check if there is an ORM (Occlusion, Roughness, Metallic).
if (occlusionTexture != hg::InvalidTextureRef || roughnessTexture != hg::InvalidTextureRef || metallicTexture != hg::InvalidTextureRef) {
json preprocess;
auto metallicRoughnessTexture =
occlusionTexture != hg::InvalidTextureRef ? occlusionTexture : (roughnessTexture != hg::InvalidTextureRef ? roughnessTexture : metallicTexture);
if (occlusionTexture != roughnessTexture || roughnessTexture != metallicTexture || metallicTexture != occlusionTexture) {
json occlusionJSON;
if (occlusionTexture != hg::InvalidTextureRef)
occlusionJSON = resources.textures.GetName(occlusionTexture);
else
occlusionJSON = (int)orm.x * 255;
json roughnessJSON;
if (roughnessTexture != hg::InvalidTextureRef)
roughnessJSON = resources.textures.GetName(roughnessTexture);
else
roughnessJSON = (int)orm.y * 255;
json metallicJSON;
if (metallicTexture != hg::InvalidTextureRef)
metallicJSON = resources.textures.GetName(metallicTexture);
else
metallicJSON = (int)orm.z * 255;
preprocess = {"preprocess", {{"construct", {occlusionJSON, roughnessJSON, metallicJSON}}}};
}
json meta_occlusionTexture_json = {{"profiles", {{"default", {{"compression", "BC7"}, preprocess}}}}};
auto meta_occlusionTexture = meta_occlusionTexture_json.dump();
if (GetOutputPath(dst_path, config.prj_path, resources.textures.GetName(metallicRoughnessTexture), {}, "meta", config.import_policy_texture)) {
if (std::FILE *f = std::fopen(dst_path.c_str(), "w")) {
std::fwrite(meta_occlusionTexture.data(), sizeof meta_occlusionTexture[0], meta_occlusionTexture.size(), f);
std::fclose(f);
}
}
mat.textures["uOcclusionRoughnessMetalnessMap"] = {metallicRoughnessTexture, 1};
}
mat.values["uBaseOpacityColor"] = {bgfx::UniformType::Vec4, {diffuse.x, diffuse.y, diffuse.z, diffuse.w}};
mat.values["uOcclusionRoughnessMetalnessColor"] = {bgfx::UniformType::Vec4, {orm.x, orm.y, orm.z, orm.w}};
mat.values["uSelfColor"] = {bgfx::UniformType::Vec4, {emissive.x, emissive.y, emissive.z, emissive.w}};
if (opacityTexture != hg::InvalidTextureRef || diffuse.w < 1)
SetMaterialBlendMode(mat, hg::BM_Alpha);
if (!config.shader.empty())
shader = config.shader; // Use the overridden shader if provided.
hg::debug(hg::format(" - Using pipeline shader '%1'").arg(shader));
mat.program = resources.programs.Add(shader.c_str(), {});
// FinalizeMaterial(mat, fbx_material->GetName(), geo_name);
return mat;
}
#define __PolIndex (pol_index[p] + v)
#define __PolRemapIndex (pol_index[p] + (geo.pol[p].vtx_count - 1 - v))
static void ExportGeometry(
const pxr::UsdGeomMesh &geoMesh, const pxr::UsdGeomSubset *geoMeshSubSet, hg::Geometry &geo, const std::set<pxr::TfToken> &uvMapVarname) {
pxr::VtArray<pxr::GfVec3f> points;
pxr::VtArray<pxr::GfVec3f> normals;
std::vector<pxr::VtArray<pxr::GfVec2f>> uvs;
pxr::VtArray<int> faceVertexCounts;
pxr::VtArray<int> faceVertexIndices;
pxr::VtArray<int> faceSubsetIndices;
// vertices
geoMesh.GetPointsAttr().Get(&points);
geo.vtx.resize(points.size());
memcpy(geo.vtx.data(), points.data(), geo.vtx.size() * sizeof(float) * 3);
// apply global scale from usd to be in meter
const auto globalScale = pxr::UsdGeomGetStageMetersPerUnit(geoMesh.GetPrim().GetStage());
for (auto &v : geo.vtx) {
v *= globalScale;
}
// normals
geoMesh.GetNormalsAttr().Get(&normals);
// faceVertexCounts
geoMesh.GetFaceVertexCountsAttr().Get(&faceVertexCounts);
// faceVertexIndices
geoMesh.GetFaceVertexIndicesAttr().Get(&faceVertexIndices);
// uv texcoord from blender (TODO test from other sources)
for (const auto &UVToken : uvMapVarname) {
auto UVPrim = pxr::UsdGeomPrimvar(geoMesh.GetPrim().GetAttribute(pxr::TfToken("primvars:"+UVToken.GetString())));
if (UVPrim.HasValue()) {
uvs.resize(uvs.size()+1);
UVPrim.Get(&uvs.back());
}
}
// If a geometry subset exists, retrieve its indices.
if (geoMeshSubSet)
geoMeshSubSet->GetIndicesAttr().Get(&faceSubsetIndices);
hg::debug(hg::format(" %1: geoMesh.points = %2\n").arg(__func__).arg(points.size()));
hg::debug(hg::format(" # of normals = %1\n").arg(normals.size()));
hg::debug(hg::format(" # of faceVertexCounts = %1\n").arg(faceVertexCounts.size()));
hg::debug(hg::format(" # of faceVertexIndices = %1\n").arg(faceVertexIndices.size()));
hg::debug(hg::format(" # of nb uv = %1\n").arg(uvs.size()));
hg::debug(hg::format(" # of faceSubsetIndices = %1\n").arg(faceSubsetIndices.size()));
size_t face_offset = 0;
for (size_t fid = 0; fid < faceVertexCounts.size(); fid++) {
int f_count = faceVertexCounts[fid];
assert(f_count >= 3);
hg::Geometry::Polygon p{uint8_t(f_count), 0};
geo.pol.push_back(p);
for (size_t f = 0; f < f_count; f++) {
// indices
geo.binding.push_back(faceVertexIndices[face_offset + (f_count-1-f)]);
// normal x,y,z
if (normals.size()) {
int idx = face_offset + (f_count - 1 - f);
if (normals.size() == points.size())
idx = faceVertexIndices[face_offset + (f_count - 1 - f)];
hg::Vec3 n(normals[idx][0], normals[idx][1], normals[idx][2]);
geo.normal.push_back(n);
}
// u, v
for (int i = 0; i < uvs.size(); ++i) {
const auto &uvUSD = uvs[i];
int idx = face_offset + (f_count - 1 - f);
if (normals.size() == points.size())
idx = faceVertexIndices[face_offset + (f_count - 1 - f)];
hg::Vec2 uv(uvUSD[idx][0], uvUSD[idx][1]);
uv.y = 1.f - uv.y;
geo.uv[i].push_back(uv);
}
}
face_offset += f_count;
}
// If a subset exists, modify the geometry. TODO: This current method is not very efficient, consider optimization.
if (faceSubsetIndices.size() > 0) {
std::vector<hg::Geometry::Polygon> pol;
std::vector<uint32_t> binding;
std::vector<hg::Vec3> normal; // per-polygon-vertex
std::array<hg::Geometry::UVSet, 8> uv; // per-polygon-vertex
size_t face_offset = 0;
for (size_t i = 0; i < geo.pol.size(); ++i) {
// find if this poly is in the mesh
for (const auto &j: faceSubsetIndices)
if (i == j) {
pol.push_back(geo.pol[i]);
for (size_t f = 0; f < geo.pol[i].vtx_count; f++) {
// indices
binding.push_back(geo.binding[face_offset + f]);
// normal x,y,z
if (normals.size())
normal.push_back(geo.normal[face_offset + f]);
// u, v
for (int i = 0; i < uvs.size(); ++i)
uv[i].push_back(geo.uv[i][face_offset + f]);
}
break;
}
face_offset += geo.pol[i].vtx_count;
}
geo.pol = pol;
geo.binding = binding;
geo.normal = normal;
geo.uv = uv;
}
}
static hg::Object GetObjectWithMaterial(const pxr::UsdPrim &p, std::set<pxr::TfToken> &uvMapVarname, hg::Scene &scene,
const Config &config, hg::PipelineResources &resources) {
pxr::UsdGeomMesh geoUSD(p);
std::string path = p.GetPath().GetString();
auto object = scene.CreateObject();
// Add material to the primitive.
// MATERIALS:
// Assign one material per primitive.
bool foundMat = false;
pxr::UsdShadeMaterialBindingAPI materialBinding(p);
auto binding = materialBinding.GetDirectBinding();
if (pxr::UsdShadeMaterial shadeMaterial = binding.GetMaterial()) {
pxr::UsdShadeShader shader = shadeMaterial.ComputeSurfaceSource();
// if there is no shader with defaut render context, find the ONE
if (!shader) {
// find the output surface with the UsdPreviewSurface (we handle this one for now)
auto outputs = shadeMaterial.GetSurfaceOutputs();
for (const auto &output : outputs) {
if (output.HasConnectedSource()) {
// get the source connected to the output
auto sourceOutput = output.GetConnectedSources()[0].source;
auto sourceShaderName = sourceOutput.GetPrim().GetName().GetString();
if (sourceShaderName == "UsdPreviewSurface")
shader = pxr::UsdShadeShader(sourceOutput.GetPrim());
}
}
}
if (shader) {
foundMat = true;
// get the material
auto mat = ExportMaterial(shader, uvMapVarname, *p.GetStage(), config, resources);
/*
if (geo.skin.size())
mat.flags |= hg::MF_EnableSkinning;
*/
// check double side
bool isDoubleSided = false;
geoUSD.GetDoubleSidedAttr().Get(&isDoubleSided);
// if it's a geo subset check the parent
if (p.GetTypeName() == "GeomSubset")
pxr::UsdGeomMesh(p.GetParent()).GetDoubleSidedAttr().Get(&isDoubleSided);
if (isDoubleSided)
SetMaterialFaceCulling(mat, hg::FC_Disabled);
object.SetMaterial(0, std::move(mat));
object.SetMaterialName(0, shader.GetPath().GetString());
}else
hg::error("!Unexpected shader from UsdShadeShader()");
}
// If the material is not found, create a dummy material to make the object visible in the engine.
if(!foundMat) {
hg::debug(hg::format(" - Has no material, set a dummy one"));
hg::Material mat;
std::string shader;
shader = "core/shader/pbr.hps";
if (!config.shader.empty())
shader = config.shader; // Use the overridden shader if it is provided in the configuration.
hg::debug(hg::format(" - Using pipeline shader '%1'").arg(shader));
mat.program = resources.programs.Add(shader.c_str(), {});
// check in case there is special primvars
hg::Vec4 diffuse = {0.5f, 0.5f, 0.5f, 1.f};
if (auto diffuseAttr = p.GetAttribute(pxr::TfToken("primvars:displayColor"))) {
//auto y = diffuseAttr.GetTypeName().GetCPPTypeName();
pxr::VtArray<pxr::GfVec3f> diffuseUSD;
diffuseAttr.Get(&diffuseUSD);
if (diffuseUSD.size() > 1) {
diffuse.x = diffuseUSD[0].data()[0];
diffuse.y = diffuseUSD[0].data()[1];
diffuse.z = diffuseUSD[0].data()[2];
}
}
mat.values["uBaseOpacityColor"] = {bgfx::UniformType::Vec4, {diffuse.x, diffuse.y, diffuse.z, diffuse.w}};
mat.values["uOcclusionRoughnessMetalnessColor"] = {bgfx::UniformType::Vec4, {1.f, 1.f, 0.f, -1.f}};
mat.values["uSelfColor"] = {bgfx::UniformType::Vec4, {0.f, 0.f, 0.f, -1.f}};
object.SetMaterial(0, std::move(mat));
object.SetMaterialName(0, "dummy_mat");
}
return object;
}
std::map<std::string, hg::Object> primToObject;
std::map<std::string, std::string> protoToInstance;
//
static hg::Object ExportObject(const pxr::UsdPrim &p, hg::Node *node, hg::Scene &scene, const Config &config, hg::PipelineResources &resources) {
hg::Object object;
pxr::UsdGeomMesh geoUSD(p);
std::string path = p.GetPath().GetString();
std::string hashIdentifierPrim;
for (auto o : p.GetPrimIndex().GetNodeRange())
hashIdentifierPrim = pxr::TfStringify(o.GetLayerStack()) + o.GetPath().GetText();
//auto j = p.GetPrimIndex().DumpToString();
//auto d = p.GetPrimIndex().GetNodeRange().DumpToString();
/*auto m = pxr::TfStringify(p.GetPrimIndex().GetRootNode().GetLayerStack());
auto j=p.GetPrimIndex().GetRootNode().GetLayerStack()->GetLayers();
auto k = p.GetPrimIndex().GetRootNode().GetLayerStack()->GetLayers()[0]->GetDisplayName();
*/
// If the geometry is not found, import it.
if (primToObject.find(hashIdentifierPrim) != primToObject.end()) {
object = primToObject[hashIdentifierPrim];
} else {
// If the geometry is not found, import it.
hg::Geometry geo;
std::set<pxr::TfToken> uvMapVarname;
object = GetObjectWithMaterial(p, uvMapVarname, scene, config, resources);
ExportGeometry(geoUSD, nullptr, geo, uvMapVarname);
const auto vtx_to_pol = hg::ComputeVertexToPolygon(geo);
auto vtx_normal = hg::ComputeVertexNormal(geo, vtx_to_pol, hg::Deg(45.f));
// Recalculate the vertex normals.
bool recalculate_normal = config.recalculate_normal;
if (geo.normal.empty())
recalculate_normal = true;
if (recalculate_normal) {
hg::debug(" - Recalculate normals");
geo.normal = vtx_normal;
} else
vtx_normal = geo.normal;
// Recalculate the vertex tangent frame.
bool recalculate_tangent = config.recalculate_tangent;
if (geo.tangent.empty())
recalculate_tangent = true;
else if (geo.tangent.size() != geo.normal.size()) { // be sure tangent is same size of normal, some strange things can happen with multiple
hg::debug("CAREFUL Normal and Tangent are not the same size, can happen if you have submesh (some with tangent and some without)");
geo.tangent.resize(geo.normal.size());
}
if (recalculate_tangent) {
hg::debug(" - Recalculate tangent frames (MikkT)");
if (!geo.uv[0].empty())
geo.tangent = hg::ComputeVertexTangent(geo, vtx_normal, 0, hg::Deg(45.f));
}
if (GetOutputPath(path, config.base_output_path, path, {}, "geo", config.import_policy_geometry)) {
hg::debug(hg::format("Export geometry to '%1'").arg(path));
hg::SaveGeometryToFile(path.c_str(), geo);
}
path = MakeRelativeResourceName(path, config.prj_path, config.prefix);
object.SetModelRef(resources.models.Add(path.c_str(), {}));
primToObject[hashIdentifierPrim] = object;
}
// find bind pose in the skins
/* if (gltf_node.skin >= 0) {
hg::debug(hg::format("Exporting geometry skin"));
const auto &skin = model.skins[gltf_node.skin];
geo.bind_pose.resize(skin.joints.size());
const auto attribAccessor = model.accessors[skin.inverseBindMatrices];
const auto &bufferView = model.bufferViews[attribAccessor.bufferView];
const auto &buffer = model.buffers[bufferView.buffer];
const auto dataPtr = buffer.data.data() + bufferView.byteOffset + attribAccessor.byteOffset;
const auto byte_stride = attribAccessor.ByteStride(bufferView);
const auto count = attribAccessor.count;
switch (attribAccessor.type) {
case TINYGLTF_TYPE_MAT4: {
switch (attribAccessor.componentType) {
case TINYGLTF_COMPONENT_TYPE_DOUBLE:
case TINYGLTF_COMPONENT_TYPE_FLOAT: {
floatArray<float> value(arrayAdapter<float>(dataPtr, count * 16, sizeof(float)));
for (size_t k{0}; k < count; ++k) {
hg::Mat4 m_InverseBindMatrices(value[k * 16], value[k * 16 + 1], value[k * 16 + 2], value[k * 16 + 4], value[k * 16 + 5],
value[k * 16 + 6], value[k * 16 + 8], value[k * 16 + 9], value[k * 16 + 10], value[k * 16 + 12], value[k * 16 + 13],
value[k * 16 + 14]);
m_InverseBindMatrices = hg::InverseFast(m_InverseBindMatrices);
auto p = hg::GetT(m_InverseBindMatrices);
p.z = -p.z;
auto r = hg::GetR(m_InverseBindMatrices);
r.x = -r.x;
r.y = -r.y;
auto s = hg::GetS(m_InverseBindMatrices);
geo.bind_pose[k] = hg::InverseFast(hg::TransformationMat4(p, r, s));
}
} break;
default:
hg::error("Unhandeled component type for inverseBindMatrices");
}
} break;
default:
hg::error("Unhandeled MAT4 type for inverseBindMatrices");
}
}*/
return object;
}
static void ExportCamera(const pxr::UsdPrim &p, hg::Node *nodeParent, hg::Scene &scene, const Config &config, hg::PipelineResources &resources) {
auto camera = scene.CreateCamera();
nodeParent->SetCamera(camera);
auto cameraUSD = pxr::UsdGeomCamera(p);
pxr::GfVec2f clippingRange;
cameraUSD.GetClippingRangeAttr().Get(&clippingRange);
camera.SetZNear(clippingRange[0]);
camera.SetZFar(clippingRange[1]);
pxr::TfToken projAttr;
cameraUSD.GetProjectionAttr().Get(&projAttr);
if (projAttr == pxr::UsdGeomTokens->orthographic) {
camera.SetIsOrthographic(true);
}else {
float fov;
cameraUSD.GetVerticalApertureAttr().Get(&fov);
camera.SetFov(hg::Deg(fov));
camera.SetIsOrthographic(false);
}
}
static void ExportLight(const pxr::UsdPrim &p, const pxr::TfToken type, hg::Node *nodeParent, hg::Scene &scene, const Config &config, hg::PipelineResources &resources) {
auto light = scene.CreateLight();
nodeParent->SetLight(light);
pxr::UsdLuxBoundableLightBase lightUSD;
if (type == "SphereLight") {
pxr::UsdLuxSphereLight sphereLight(p);
lightUSD = (pxr::UsdLuxBoundableLightBase)sphereLight;
light.SetType(hg::LT_Point);
float radiusAttr;
sphereLight.GetRadiusAttr().Get(&radiusAttr);
light.SetRadius(radiusAttr);
} else if (type == "DistantLight") {
pxr::UsdLuxDistantLight distantLight(p);
lightUSD = (pxr::UsdLuxBoundableLightBase)distantLight;
light.SetType(hg::LT_Spot);
float angleAttr;
distantLight.GetAngleAttr().Get(&angleAttr);
light.SetRadius(angleAttr);
} else if (type == "DomeLight") {
pxr::UsdLuxDomeLight domeLight(p);
lightUSD = (pxr::UsdLuxBoundableLightBase)domeLight;
}
// add common value
if (type == "SphereLight" || type == "DistantLight" || type == "DomeLight") {
pxr::GfVec3f colorAttr;
lightUSD.GetColorAttr().Get(&colorAttr);
light.SetDiffuseColor(hg::Color(colorAttr.data()[0], colorAttr.data()[1], colorAttr.data()[2]));
}
}
static hg::Mat4 GetXFormMat(const pxr::UsdPrim& p) {
auto xForm = pxr::UsdGeomXformable(p);
pxr::GfMatrix4d transform;
bool resetsXformStack;
xForm.GetLocalTransformation(&transform, &resetsXformStack);
hg::Mat4 m(transform.data()[0], transform.data()[1], transform.data()[2], transform.data()[4], transform.data()[5], transform.data()[6], transform.data()[8],
transform.data()[9], transform.data()[10], transform.data()[12], transform.data()[13], transform.data()[14]);
auto t = hg::GetT(m) * pxr::UsdGeomGetStageMetersPerUnit(p.GetStage());
hg::SetT(m, t);
return m;
}
//
static void ExportNode(const pxr::UsdPrim &p, hg::Node *nodeParent, hg::Scene &scene, const Config &config, hg::PipelineResources &resources) {
auto type = p.GetTypeName();
if (type == "Material" || type == "Shader") // don't export node to scene for these types
return;
hg::log(hg::format("type: %1, %2").arg(type.GetString()).arg(p.GetPath().GetString().c_str()));
pxr::ArResolverContextBinder resolverContextBinder(p.GetStage()->GetPathResolverContext());
auto node = scene.CreateNode(p.GetName());
node.SetTransform(scene.CreateTransform());
// Transform
hg::Mat4 m = GetXFormMat(p);
// If there is no parent, modify the base matrix.
if (!nodeParent) {
// Rotate the transform to account for the Z-axis as the up direction.
if (UsdGeomGetStageUpAxis(p.GetStage()) == pxr::UsdGeomTokens->z) {
hg::Mat44 to_hg(1.f, 0.f, 0.f, 0.f, 0.f, 0.f, 1.f, 0.f, 0.f, 1.f, 0.f, 0.f, 0.f, 0.f, 0.f, 1.f);
auto xForm = pxr::UsdGeomXformable(p);
pxr::GfMatrix4d transform;
bool resetsXformStack;
xForm.GetLocalTransformation(&transform, &resetsXformStack);
hg::Mat44 m44(transform.data()[0], transform.data()[1], transform.data()[2], transform.data()[3], transform.data()[4], transform.data()[5],
transform.data()[6], transform.data()[7], transform.data()[8], transform.data()[9], transform.data()[10], transform.data()[11],
transform.data()[12], transform.data()[13], transform.data()[14], transform.data()[15]);
m44 = to_hg * m44;
hg::Mat4 mt(m44.m[0][0], m44.m[1][0], m44.m[2][0], m44.m[0][1], m44.m[1][1], m44.m[2][1], m44.m[0][2], m44.m[1][2], m44.m[2][2], m44.m[0][3],
m44.m[1][3], m44.m[2][3]);
m = mt;
}
auto s = hg::GetS(m) * config.geometry_scale;
hg::SetS(m, s);
} else {
// there is a node parent, so parent it
node.GetTransform().SetParent(nodeParent->ref);
}
// Camera
if (type == "Camera") {
m = m * hg::Mat4(hg::RotationMatX(hg::Pi)) * hg::Mat4(hg::RotationMatZ(hg::Pi));
auto s = hg::GetS(m);
hg::SetS(m, hg::Vec3(-s.x, s.y, s.z));
ExportCamera(p, &node, scene, config, resources);
}// light
else if (type == "DomeLight" || type == "DistantLight" || type == "SphereLight") {
ExportLight(p, type, &node, scene, config, resources);
}// Mesh
else if (type == "Mesh") {
auto object = ExportObject(p, &node, scene, config, resources);
// set object
node.SetObject(object);
}// GeomSubset
else if (type == "GeomSubset") {
hg::Object object;
std::string hashIdentifierPrim;
for (auto o : p.GetPrimIndex().GetNodeRange())
hashIdentifierPrim = pxr::TfStringify(o.GetLayerStack()) + o.GetPath().GetText();
// auto j = c.GetPrimIndex().DumpToString();
// If the geometry is not found, import it.
if (primToObject.find(hashIdentifierPrim) != primToObject.end()) {
object = primToObject[hashIdentifierPrim];
} else {
std::string path = p.GetPath().GetString();
hg::debug(hg::format(" add geometry subset").arg(path));
pxr::UsdGeomSubset subsetC(p);
std::set<pxr::TfToken> uvMapVarname;
object = GetObjectWithMaterial(p, uvMapVarname, scene, config, resources);
hg::Geometry geoSubset;
pxr::UsdGeomMesh geoUSDParent(p.GetParent());
ExportGeometry(geoUSDParent, &subsetC, geoSubset, uvMapVarname);
if (GetOutputPath(path, config.base_output_path, path, {}, "geo", config.import_policy_geometry)) {
hg::debug(hg::format("Export geometry to '%1'").arg(path));
hg::SaveGeometryToFile(path.c_str(), geoSubset);
}
path = MakeRelativeResourceName(path, config.prj_path, config.prefix);
object.SetModelRef(resources.models.Add(path.c_str(), {}));
primToObject[hashIdentifierPrim] = object;
}
node.SetObject(object);
// If it's a subset, make sure to remove the parent mesh object.
nodeParent->SetObject({});
} // Sphere
else if (type == "Sphere") {
std::set<pxr::TfToken> uvMapVarname;
auto object = GetObjectWithMaterial(p, uvMapVarname, scene, config, resources);
// FIXME: Unable to save procedural geometry, replace it with a generic model.
/* bgfx::VertexLayout vs_pos_normal_decl;
vs_pos_normal_decl.begin();
vs_pos_normal_decl.add(bgfx::Attrib::Enum::Position, 3, bgfx::AttribType::Enum::Float);
vs_pos_normal_decl.add(bgfx::Attrib::Enum::Normal, 3, bgfx::AttribType::Enum::Uint8, true, true);
vs_pos_normal_decl.end();
*/
pxr::UsdGeomSphere sphere(p);
float radiusAttr = 1.f;
sphere.GetRadiusAttr().Get(&radiusAttr);
m = m * hg::ScaleMat4(radiusAttr * pxr::UsdGeomGetStageMetersPerUnit(p.GetStage()));
/* auto sphere_model = hg::CreateSphereModel(vs_pos_normal_decl, radiusAttr, 5, 5);
auto sphere_model_ref = resources.models.Add(p.GetPath().GetString().c_str(), sphere_model);
object.SetModelRef(sphere_model_ref);
*/
object.SetModelRef(resources.models.Add("core_library/primitives/sphere.geo", {}));
node.SetObject(object);
}
// Check the children.
if (p.IsInstance()){
auto proto = p.GetPrototype();
auto protoName = proto.GetName().GetString();
std::string out_path_proto;
if (protoToInstance.find(protoName) != protoToInstance.end()) {
out_path_proto = protoToInstance[protoName];
} else {
hg::Scene sceneProto;
auto nodeProto = sceneProto.CreateNode(protoName);
nodeProto.SetTransform(sceneProto.CreateTransform());
for (auto c : p.GetPrototype().GetChildren())
ExportNode(c, &nodeProto, sceneProto, config, resources);
nodeProto.GetTransform().SetParent(node.ref);
if (GetOutputPath(out_path_proto, config.base_output_path, protoName, {}, "scn", config.import_policy_scene))
SaveSceneJsonToFile(out_path_proto.c_str(), sceneProto, resources);
out_path_proto = MakeRelativeResourceName(out_path_proto, config.prj_path, config.prefix);
protoToInstance[protoName] = out_path_proto;
}
node.SetInstance(scene.CreateInstance(out_path_proto));
}
else
for (auto c : p.GetChildren())
ExportNode(c, &node, scene, config, resources);
// Set the matrix
node.GetTransform().SetLocal(m);
}
static bool ImportUSDScene(const std::string &path, const Config &config) {
const auto t_start = hg::time_now();
if (config.base_output_path.empty())
return false;
// create output directory if missing
if (hg::Exists(config.base_output_path.c_str())) {
if (!hg::IsDir(config.base_output_path.c_str()))
return false; // can't output to this path
} else {
if (!hg::MkDir(config.base_output_path.c_str()))
return false;
}
// create texture directory if missing
if (!hg::Exists((config.base_output_path + "/Textures").c_str()))
hg::MkDir((config.base_output_path + "/Textures").c_str());
hg::Scene scene;
hg::PipelineResources resources;
//
auto stage = pxr::UsdStage::Open(path);
//auto stage = pxr::UsdStage::Open("C:\\boulot\\works\\Harfang\\couch.usda");
//auto stage = pxr::UsdStage::Open("C:\\Users\\Scorpheus\\Downloads\\island-usd-v2.0\\island-usd-v2.0\\island\\usd\\elements\\isBayCedarA1\\element.usda");
pxr::ArResolverContextBinder resolverContextBinder(stage->GetPathResolverContext());
/* std::string flattenStateString;
stage->Flatten()->ExportToString(&flattenStateString);