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Fix #114346: PLY export crash with multiple objects that have different custom attributes

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Custom attribute export (#114320) code did not realize that
PLY exports everything as one single "mesh" with the same vertex
data for everything. So if exporting several input meshes and they
have different vertex attributes, the result needs to have a union
of all present attributes, with fake/zero data for the ones
that were not actually present. Fixes #114346.
This commit is contained in:
Aras Pranckevicius
2023-11-02 22:58:26 +02:00
parent afe297231d
commit e98cc412ef
3 changed files with 130 additions and 88 deletions
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201
source/blender/io/ply/exporter/ply_export_load_plydata.cc
View File

@@ -148,11 +148,33 @@ static void generate_vertex_map(const Mesh *mesh,
}
}
static void load_custom_attributes(const Mesh *mesh, Vector<PlyCustomAttribute> &r_attributes)
static float *find_or_add_attribute(const StringRef name,
int64_t size,
uint32_t vertex_offset,
Vector<PlyCustomAttribute> &r_attributes)
{
/* Do we have this attribute from some other object already? */
for (PlyCustomAttribute &attr : r_attributes) {
if (attr.name == name) {
BLI_assert(attr.data.size() == vertex_offset);
attr.data.resize(attr.data.size() + size, 0.0f);
return attr.data.data() + vertex_offset;
}
}
/* We don't have it yet, create and fill with zero data for previous objects. */
r_attributes.append(PlyCustomAttribute(name, vertex_offset + size));
return r_attributes.last().data.data() + vertex_offset;
}
static void load_custom_attributes(const Mesh *mesh,
const Vector<int> &ply_to_vertex,
uint32_t vertex_offset,
Vector<PlyCustomAttribute> &r_attributes)
{
const bke::AttributeAccessor attributes = mesh->attributes();
const StringRef color_name = mesh->active_color_attribute;
const StringRef uv_name = CustomData_get_active_layer_name(&mesh->loop_data, CD_PROP_FLOAT2);
const int64_t size = ply_to_vertex.size();
attributes.for_all([&](const bke::AttributeIDRef &attribute_id,
const bke::AttributeMetaData &meta_data) {
@@ -165,140 +187,143 @@ static void load_custom_attributes(const Mesh *mesh, Vector<PlyCustomAttribute>
const GVArraySpan attribute = *mesh->attributes().lookup(
attribute_id, meta_data.domain, meta_data.data_type);
const int64_t size = attribute.size();
if (size == 0) {
if (attribute.is_empty()) {
return true;
}
switch (meta_data.data_type) {
case CD_PROP_FLOAT: {
PlyCustomAttribute attr(attribute_id.name(), size);
float *attr = find_or_add_attribute(
attribute_id.name(), size, vertex_offset, r_attributes);
auto typed = attribute.typed<float>();
for (const int64_t i : typed.index_range()) {
attr.data[i] = typed[i];
for (const int64_t i : ply_to_vertex.index_range()) {
attr[i] = typed[ply_to_vertex[i]];
}
r_attributes.append(attr);
break;
}
case CD_PROP_INT8: {
PlyCustomAttribute attr(attribute_id.name(), size);
float *attr = find_or_add_attribute(
attribute_id.name(), size, vertex_offset, r_attributes);
auto typed = attribute.typed<int8_t>();
for (const int64_t i : typed.index_range()) {
attr.data[i] = typed[i];
for (const int64_t i : ply_to_vertex.index_range()) {
attr[i] = typed[ply_to_vertex[i]];
}
r_attributes.append(attr);
break;
}
case CD_PROP_INT32: {
PlyCustomAttribute attr(attribute_id.name(), size);
float *attr = find_or_add_attribute(
attribute_id.name(), size, vertex_offset, r_attributes);
auto typed = attribute.typed<int32_t>();
for (const int64_t i : typed.index_range()) {
attr.data[i] = typed[i];
for (const int64_t i : ply_to_vertex.index_range()) {
attr[i] = typed[ply_to_vertex[i]];
}
r_attributes.append(attr);
break;
}
case CD_PROP_INT32_2D: {
PlyCustomAttribute attr_x(attribute_id.name() + "_x", size);
PlyCustomAttribute attr_y(attribute_id.name() + "_y", size);
float *attr_x = find_or_add_attribute(
attribute_id.name() + "_x", size, vertex_offset, r_attributes);
float *attr_y = find_or_add_attribute(
attribute_id.name() + "_y", size, vertex_offset, r_attributes);
auto typed = attribute.typed<int2>();
for (const int64_t i : typed.index_range()) {
attr_x.data[i] = typed[i].x;
attr_y.data[i] = typed[i].y;
for (const int64_t i : ply_to_vertex.index_range()) {
int j = ply_to_vertex[i];
attr_x[i] = typed[j].x;
attr_y[i] = typed[j].y;
}
r_attributes.append(attr_x);
r_attributes.append(attr_y);
break;
}
case CD_PROP_FLOAT2: {
PlyCustomAttribute attr_x(attribute_id.name() + "_x", size);
PlyCustomAttribute attr_y(attribute_id.name() + "_y", size);
float *attr_x = find_or_add_attribute(
attribute_id.name() + "_x", size, vertex_offset, r_attributes);
float *attr_y = find_or_add_attribute(
attribute_id.name() + "_y", size, vertex_offset, r_attributes);
auto typed = attribute.typed<float2>();
for (const int64_t i : typed.index_range()) {
attr_x.data[i] = typed[i].x;
attr_y.data[i] = typed[i].y;
for (const int64_t i : ply_to_vertex.index_range()) {
int j = ply_to_vertex[i];
attr_x[i] = typed[j].x;
attr_y[i] = typed[j].y;
}
r_attributes.append(attr_x);
r_attributes.append(attr_y);
break;
}
case CD_PROP_FLOAT3: {
PlyCustomAttribute attr_x(attribute_id.name() + "_x", size);
PlyCustomAttribute attr_y(attribute_id.name() + "_y", size);
PlyCustomAttribute attr_z(attribute_id.name() + "_z", size);
float *attr_x = find_or_add_attribute(
attribute_id.name() + "_x", size, vertex_offset, r_attributes);
float *attr_y = find_or_add_attribute(
attribute_id.name() + "_y", size, vertex_offset, r_attributes);
float *attr_z = find_or_add_attribute(
attribute_id.name() + "_z", size, vertex_offset, r_attributes);
auto typed = attribute.typed<float3>();
for (const int64_t i : typed.index_range()) {
attr_x.data[i] = typed[i].x;
attr_y.data[i] = typed[i].y;
attr_z.data[i] = typed[i].z;
for (const int64_t i : ply_to_vertex.index_range()) {
int j = ply_to_vertex[i];
attr_x[i] = typed[j].x;
attr_y[i] = typed[j].y;
attr_z[i] = typed[j].z;
}
r_attributes.append(attr_x);
r_attributes.append(attr_y);
r_attributes.append(attr_z);
break;
}
case CD_PROP_BYTE_COLOR: {
PlyCustomAttribute attr_r(attribute_id.name() + "_r", size);
PlyCustomAttribute attr_g(attribute_id.name() + "_g", size);
PlyCustomAttribute attr_b(attribute_id.name() + "_b", size);
PlyCustomAttribute attr_a(attribute_id.name() + "_a", size);
float *attr_r = find_or_add_attribute(
attribute_id.name() + "_r", size, vertex_offset, r_attributes);
float *attr_g = find_or_add_attribute(
attribute_id.name() + "_g", size, vertex_offset, r_attributes);
float *attr_b = find_or_add_attribute(
attribute_id.name() + "_b", size, vertex_offset, r_attributes);
float *attr_a = find_or_add_attribute(
attribute_id.name() + "_a", size, vertex_offset, r_attributes);
auto typed = attribute.typed<ColorGeometry4b>();
for (const int64_t i : typed.index_range()) {
ColorGeometry4f col = typed[i].decode();
attr_r.data[i] = col.r;
attr_g.data[i] = col.g;
attr_b.data[i] = col.b;
attr_a.data[i] = col.a;
for (const int64_t i : ply_to_vertex.index_range()) {
ColorGeometry4f col = typed[ply_to_vertex[i]].decode();
attr_r[i] = col.r;
attr_g[i] = col.g;
attr_b[i] = col.b;
attr_a[i] = col.a;
}
r_attributes.append(attr_r);
r_attributes.append(attr_g);
r_attributes.append(attr_b);
r_attributes.append(attr_a);
break;
}
case CD_PROP_COLOR: {
PlyCustomAttribute attr_r(attribute_id.name() + "_r", size);
PlyCustomAttribute attr_g(attribute_id.name() + "_g", size);
PlyCustomAttribute attr_b(attribute_id.name() + "_b", size);
PlyCustomAttribute attr_a(attribute_id.name() + "_a", size);
float *attr_r = find_or_add_attribute(
attribute_id.name() + "_r", size, vertex_offset, r_attributes);
float *attr_g = find_or_add_attribute(
attribute_id.name() + "_g", size, vertex_offset, r_attributes);
float *attr_b = find_or_add_attribute(
attribute_id.name() + "_b", size, vertex_offset, r_attributes);
float *attr_a = find_or_add_attribute(
attribute_id.name() + "_a", size, vertex_offset, r_attributes);
auto typed = attribute.typed<ColorGeometry4f>();
for (const int64_t i : typed.index_range()) {
ColorGeometry4f col = typed[i];
attr_r.data[i] = col.r;
attr_g.data[i] = col.g;
attr_b.data[i] = col.b;
attr_a.data[i] = col.a;
for (const int64_t i : ply_to_vertex.index_range()) {
ColorGeometry4f col = typed[ply_to_vertex[i]];
attr_r[i] = col.r;
attr_g[i] = col.g;
attr_b[i] = col.b;
attr_a[i] = col.a;
}
r_attributes.append(attr_r);
r_attributes.append(attr_g);
r_attributes.append(attr_b);
r_attributes.append(attr_a);
break;
}
case CD_PROP_BOOL: {
PlyCustomAttribute attr(attribute_id.name(), size);
float *attr = find_or_add_attribute(
attribute_id.name(), size, vertex_offset, r_attributes);
auto typed = attribute.typed<bool>();
for (const int64_t i : typed.index_range()) {
attr.data[i] = typed[i] ? 1.0f : 0.0f;
for (const int64_t i : ply_to_vertex.index_range()) {
attr[i] = typed[ply_to_vertex[i]] ? 1.0f : 0.0f;
}
r_attributes.append(attr);
break;
}
case CD_PROP_QUATERNION: {
PlyCustomAttribute attr_x(attribute_id.name() + "_x", size);
PlyCustomAttribute attr_y(attribute_id.name() + "_y", size);
PlyCustomAttribute attr_z(attribute_id.name() + "_z", size);
PlyCustomAttribute attr_w(attribute_id.name() + "_w", size);
float *attr_x = find_or_add_attribute(
attribute_id.name() + "_x", size, vertex_offset, r_attributes);
float *attr_y = find_or_add_attribute(
attribute_id.name() + "_y", size, vertex_offset, r_attributes);
float *attr_z = find_or_add_attribute(
attribute_id.name() + "_z", size, vertex_offset, r_attributes);
float *attr_w = find_or_add_attribute(
attribute_id.name() + "_w", size, vertex_offset, r_attributes);
auto typed = attribute.typed<math::Quaternion>();
for (const int64_t i : typed.index_range()) {
attr_x.data[i] = typed[i].x;
attr_y.data[i] = typed[i].y;
attr_z.data[i] = typed[i].z;
attr_w.data[i] = typed[i].w;
for (const int64_t i : ply_to_vertex.index_range()) {
int j = ply_to_vertex[i];
attr_x[i] = typed[j].x;
attr_y[i] = typed[j].y;
attr_z[i] = typed[j].z;
attr_w[i] = typed[j].w;
}
r_attributes.append(attr_x);
r_attributes.append(attr_y);
r_attributes.append(attr_z);
r_attributes.append(attr_w);
break;
}
default:
@@ -430,7 +455,7 @@ void load_plydata(PlyData &plyData, Depsgraph *depsgraph, const PLYExportParams
/* Custom attributes */
if (export_params.export_attributes) {
load_custom_attributes(mesh, plyData.vertex_custom_attr);
load_custom_attributes(mesh, ply_to_vertex, vertex_offset, plyData.vertex_custom_attr);
}
/* Loose edges */
@@ -451,6 +476,12 @@ void load_plydata(PlyData &plyData, Depsgraph *depsgraph, const PLYExportParams
}
DEG_OBJECT_ITER_END;
/* Make sure all custom attribute data arrays are encompassing all input objects */
for (PlyCustomAttribute &attr : plyData.vertex_custom_attr) {
BLI_assert(attr.data.size() <= vertex_offset);
attr.data.resize(vertex_offset, 0.0f);
}
}
} // namespace blender::io::ply

5
source/blender/io/ply/intern/ply_data.hh
View File

@@ -8,7 +8,6 @@
#pragma once
#include "BLI_array.hh"
#include "BLI_math_vector_types.hh"
#include "BLI_string_ref.hh"
#include "BLI_vector.hh"
@@ -18,9 +17,9 @@ namespace blender::io::ply {
enum PlyDataTypes { NONE, CHAR, UCHAR, SHORT, USHORT, INT, UINT, FLOAT, DOUBLE, PLY_TYPE_COUNT };
struct PlyCustomAttribute {
PlyCustomAttribute(const StringRef name_, int64_t size) : name(name_), data(size) {}
PlyCustomAttribute(const StringRef name_, int64_t size) : name(name_), data(size, 0.0f) {}
std::string name;
Array<float> data; /* Any custom PLY attributes are converted to floats. */
Vector<float> data; /* Any custom PLY attributes are converted to floats. */
};
struct PlyData {

12
source/blender/io/ply/tests/io_ply_exporter_test.cc
View File

@@ -525,6 +525,18 @@ TEST_F(ply_exporter_ply_data_test, CubeLooseEdgesLoadPLYDataUV)
EXPECT_EQ_ARRAY(exp_faces, plyData.face_vertices.data(), ARRAY_SIZE(exp_faces));
}
TEST_F(ply_exporter_ply_data_test, CubesVertexAttrs)
{
PLYExportParams params = {};
params.export_uv = true;
params.export_attributes = true;
PlyData plyData = load_ply_data_from_blendfile(
"io_tests/blend_geometry/cubes_vertex_attrs.blend", params);
EXPECT_EQ(plyData.vertices.size(), 28);
EXPECT_EQ(plyData.vertex_custom_attr.size(), 11); /* Float 1 + Color 4 + ByteColor 4 + Int2D 2*/
EXPECT_EQ(plyData.vertex_custom_attr[0].data.size(), 28);
}
TEST_F(ply_exporter_ply_data_test, SuzanneLoadPLYDataUV)
{
PLYExportParams params = {};