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/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 2021 Tangent Animation. All rights reserved. */
#include "BKE_lib_id.h"
#include "BKE_mesh.h"
#include "BKE_modifier.h"
#include "BKE_object.h"
#include "DNA_cachefile_types.h"
#include "DNA_mesh_types.h"
#include "DNA_meshdata_types.h"
#include "DNA_object_types.h"
#include "DNA_space_types.h" /* for FILE_MAX */
#include "DNA_windowmanager_types.h"
#include "WM_api.h"
#include "usd_reader_shape.h"
#include <pxr/usd/usdGeom/capsule.h>
#include <pxr/usd/usdGeom/cone.h>
#include <pxr/usd/usdGeom/cube.h>
#include <pxr/usd/usdGeom/cylinder.h>
#include <pxr/usd/usdGeom/sphere.h>
#include <pxr/usdImaging/usdImaging/capsuleAdapter.h>
#include <pxr/usdImaging/usdImaging/coneAdapter.h>
#include <pxr/usdImaging/usdImaging/cubeAdapter.h>
#include <pxr/usdImaging/usdImaging/cylinderAdapter.h>
#include <pxr/usdImaging/usdImaging/sphereAdapter.h>
namespace blender::io::usd {
USDShapeReader::USDShapeReader(const pxr::UsdPrim &prim,
const USDImportParams &import_params,
const ImportSettings &settings)
: USDGeomReader(prim, import_params, settings)
{
}
void USDShapeReader::create_object(Main *bmain, double /* motionSampleTime */)
{
Mesh *mesh = BKE_mesh_add(bmain, name_.c_str());
object_ = BKE_object_add_only_object(bmain, OB_MESH, name_.c_str());
object_->data = mesh;
}
void USDShapeReader::read_object_data(Main *bmain, double motionSampleTime)
{
Mesh *mesh = (Mesh *)object_->data;
Mesh *read_mesh = this->read_mesh(
mesh, motionSampleTime, import_params_.mesh_read_flag, nullptr);
if (read_mesh != mesh) {
/* FIXME: after 2.80; `mesh->flag` isn't copied by #BKE_mesh_nomain_to_mesh() */
/* read_mesh can be freed by BKE_mesh_nomain_to_mesh(), so get the flag before that happens. */
uint16_t autosmooth = (read_mesh->flag & ME_AUTOSMOOTH);
BKE_mesh_nomain_to_mesh(read_mesh, mesh, object_);
mesh->flag |= autosmooth;
if (is_time_varying()) {
USDGeomReader::add_cache_modifier();
}
}
USDXformReader::read_object_data(bmain, motionSampleTime);
}
template<typename Adapter>
void USDShapeReader::read_values(const double motionSampleTime,
pxr::VtVec3fArray &positions,
pxr::VtIntArray &face_indices,
pxr::VtIntArray &face_counts)
{
pxr::VtValue meshPoints = Adapter::GetMeshPoints(prim_, motionSampleTime);
positions = meshPoints.template Get<pxr::VtArray<pxr::GfVec3f>>();
pxr::HdMeshTopology meshTopologyValue = Adapter::GetMeshTopology().template Get<pxr::HdMeshTopology>();
face_counts = meshTopologyValue.GetFaceVertexCounts();
face_indices = meshTopologyValue.GetFaceVertexIndices();
}
struct Mesh *USDShapeReader::read_mesh(struct Mesh *existing_mesh,
double motionSampleTime,
int /* read_flag */,
const char ** /* err_str */)
{
if (!prim_) {
return existing_mesh;
}
pxr::VtVec3fArray positions;
pxr::VtIntArray face_indices;
pxr::VtIntArray face_counts;
Mesh *active_mesh = existing_mesh;
const bool is_capsule = prim_.IsA<pxr::UsdGeomCapsule>();
const bool is_cylinder = prim_.IsA<pxr::UsdGeomCylinder>();
const bool is_cone = prim_.IsA<pxr::UsdGeomCone>();
const bool is_cube = prim_.IsA<pxr::UsdGeomCube>();
const bool is_sphere = prim_.IsA<pxr::UsdGeomSphere>();
if (is_capsule) {
read_values<pxr::UsdImagingCapsuleAdapter>(motionSampleTime, positions, face_indices, face_counts);
}
else if (is_cylinder) {
read_values<pxr::UsdImagingCylinderAdapter>(motionSampleTime, positions, face_indices, face_counts);
}
else if (is_cone) {
read_values<pxr::UsdImagingConeAdapter>(motionSampleTime, positions, face_indices, face_counts);
}
else if (is_cube) {
read_values<pxr::UsdImagingCubeAdapter>(motionSampleTime, positions, face_indices, face_counts);
}
else if (is_sphere) {
read_values<pxr::UsdImagingSphereAdapter>(motionSampleTime, positions, face_indices, face_counts);
}
else {
WM_reportf(RPT_ERROR,
"Unhandled Gprim type: %s (%s)",
prim_.GetTypeName().GetText(),
prim_.GetPath().GetText());
return existing_mesh;
}
/* Should be guaranteed to have a good set of data by this point-- copy over. */
const bool position_counts_match = active_mesh ? positions.size() == active_mesh->totvert :
false;
const bool poly_counts_match = active_mesh ? face_counts.size() == active_mesh->totpoly : false;
if (!position_counts_match || !poly_counts_match) {
active_mesh = BKE_mesh_new_nomain_from_template(
existing_mesh, positions.size(), 0, 0, face_indices.size(), face_counts.size());
}
MutableSpan<MVert> verts = active_mesh->verts_for_write();
for (int i = 0; i < positions.size(); i++) {
MVert &mvert = verts[i];
mvert.co[0] = positions[i][0];
mvert.co[1] = positions[i][1];
mvert.co[2] = positions[i][2];
}
MutableSpan<MPoly> polys = active_mesh->polys_for_write();
MutableSpan<MLoop> loops = active_mesh->loops_for_write();
int loop_index = 0;
if (!poly_counts_match) {
for (int i = 0; i < face_counts.size(); i++) {
const int face_size = face_counts[i];
MPoly &poly = polys[i];
poly.loopstart = loop_index;
poly.totloop = face_size;
/* Don't smooth-shade cubes; we're not worrying about sharpness for Gprims. */
poly.flag |= is_cube ? 0 : ME_SMOOTH;
for (int f = 0; f < face_size; ++f, ++loop_index) {
loops[loop_index].v = face_indices[loop_index];
}
}
}
BKE_mesh_calc_edges(active_mesh, false, false);
BKE_mesh_normals_tag_dirty(active_mesh);
return active_mesh;
}
bool USDShapeReader::is_time_varying()
{
bool result;
const bool is_capsule = prim_.IsA<pxr::UsdGeomCapsule>();
const bool is_cylinder = prim_.IsA<pxr::UsdGeomCylinder>();
const bool is_cone = prim_.IsA<pxr::UsdGeomCone>();
const bool is_cube = prim_.IsA<pxr::UsdGeomCube>();
const bool is_sphere = prim_.IsA<pxr::UsdGeomSphere>();
if (is_capsule) {
pxr::UsdGeomCapsule geom(prim_);
result = (geom.GetAxisAttr().ValueMightBeTimeVarying() ||
geom.GetHeightAttr().ValueMightBeTimeVarying() ||
geom.GetRadiusAttr().ValueMightBeTimeVarying());
}
else if (is_cylinder) {
pxr::UsdGeomCylinder geom(prim_);
result = (geom.GetAxisAttr().ValueMightBeTimeVarying() ||
geom.GetHeightAttr().ValueMightBeTimeVarying() ||
geom.GetRadiusAttr().ValueMightBeTimeVarying());
}
else if (is_cone) {
pxr::UsdGeomCone geom(prim_);
result = (geom.GetAxisAttr().ValueMightBeTimeVarying() ||
geom.GetHeightAttr().ValueMightBeTimeVarying() ||
geom.GetRadiusAttr().ValueMightBeTimeVarying());
}
else if (is_cube) {
pxr::UsdGeomCube geom(prim_);
result = (geom.GetSizeAttr().ValueMightBeTimeVarying());
}
else if (is_sphere) {
pxr::UsdGeomSphere geom(prim_);
result = (geom.GetRadiusAttr().ValueMightBeTimeVarying());
}
else {
WM_reportf(RPT_ERROR,
"Unhandled Gprim type: %s (%s)",
prim_.GetTypeName().GetText(),
prim_.GetPath().GetText());
return false;
}
return result;
}
} // namespace blender::io::usd
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