1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
|
/*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* The Original Code is Copyright (C) 2019 Blender Foundation.
* All rights reserved.
*/
#include "usd_writer_abstract.h"
#include "usd_hierarchy_iterator.h"
#include <pxr/base/tf/stringUtils.h>
extern "C" {
#include "BKE_animsys.h"
#include "BKE_key.h"
#include "DNA_modifier_types.h"
}
/* TfToken objects are not cheap to construct, so we do it once. */
namespace usdtokens {
// Materials
static const pxr::TfToken diffuse_color("diffuseColor", pxr::TfToken::Immortal);
static const pxr::TfToken metallic("metallic", pxr::TfToken::Immortal);
static const pxr::TfToken preview_shader("previewShader", pxr::TfToken::Immortal);
static const pxr::TfToken preview_surface("UsdPreviewSurface", pxr::TfToken::Immortal);
static const pxr::TfToken roughness("roughness", pxr::TfToken::Immortal);
static const pxr::TfToken surface("surface", pxr::TfToken::Immortal);
} // namespace usdtokens
namespace USD {
USDAbstractWriter::USDAbstractWriter(const USDExporterContext &usd_export_context)
: usd_export_context_(usd_export_context),
usd_value_writer_(),
frame_has_been_written_(false),
is_animated_(false)
{
}
USDAbstractWriter::~USDAbstractWriter()
{
}
bool USDAbstractWriter::is_supported(const HierarchyContext * /*context*/) const
{
return true;
}
pxr::UsdTimeCode USDAbstractWriter::get_export_time_code() const
{
if (is_animated_) {
return usd_export_context_.hierarchy_iterator->get_export_time_code();
}
// By using the default timecode USD won't even write a single `timeSample` for non-animated
// data. Instead, it writes it as non-timesampled.
static pxr::UsdTimeCode default_timecode = pxr::UsdTimeCode::Default();
return default_timecode;
}
void USDAbstractWriter::write(HierarchyContext &context)
{
if (!frame_has_been_written_) {
is_animated_ = usd_export_context_.export_params.export_animation &&
check_is_animated(context);
}
else if (!is_animated_) {
/* A frame has already been written, and without animation one frame is enough. */
return;
}
do_write(context);
frame_has_been_written_ = true;
}
bool USDAbstractWriter::check_is_animated(const HierarchyContext &context) const
{
const Object *object = context.object;
if (BKE_animdata_id_is_animated(static_cast<ID *>(object->data))) {
return true;
}
if (BKE_key_from_object(object) != nullptr) {
return true;
}
/* Test modifiers. */
/* TODO(Sybren): replace this with a check on the depsgraph to properly check for dependency on
* time. */
ModifierData *md = static_cast<ModifierData *>(object->modifiers.first);
while (md) {
if (md->type != eModifierType_Subsurf) {
return true;
}
md = md->next;
}
return false;
}
const pxr::SdfPath &USDAbstractWriter::usd_path() const
{
return usd_export_context_.usd_path;
}
pxr::UsdShadeMaterial USDAbstractWriter::ensure_usd_material(Material *material)
{
static pxr::SdfPath material_library_path("/_materials");
pxr::UsdStageRefPtr stage = usd_export_context_.stage;
// Construct the material.
pxr::TfToken material_name(usd_export_context_.hierarchy_iterator->get_id_name(&material->id));
pxr::SdfPath usd_path = material_library_path.AppendChild(material_name);
pxr::UsdShadeMaterial usd_material = pxr::UsdShadeMaterial::Get(stage, usd_path);
if (usd_material) {
return usd_material;
}
usd_material = pxr::UsdShadeMaterial::Define(stage, usd_path);
// Construct the shader.
pxr::SdfPath shader_path = usd_path.AppendChild(usdtokens::preview_shader);
pxr::UsdShadeShader shader = pxr::UsdShadeShader::Define(stage, shader_path);
shader.CreateIdAttr(pxr::VtValue(usdtokens::preview_surface));
shader.CreateInput(usdtokens::diffuse_color, pxr::SdfValueTypeNames->Color3f)
.Set(pxr::GfVec3f(material->r, material->g, material->b));
shader.CreateInput(usdtokens::roughness, pxr::SdfValueTypeNames->Float).Set(material->roughness);
shader.CreateInput(usdtokens::metallic, pxr::SdfValueTypeNames->Float).Set(material->metallic);
// Connect the shader and the material together.
usd_material.CreateSurfaceOutput().ConnectToSource(shader, usdtokens::surface);
return usd_material;
}
} // namespace USD
|
