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SceneTools: utility to flatten mesh hierarchy. 

Internals doing a few rather big allocations, will convert that to just
a single one in a next step.
pull/542/merge
Vladimír Vondruš 4 years ago
parent
72d20475c6
commit
b0477013f0
5 changed files with 646 additions and 0 deletions
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  1. 2
      src/Magnum/SceneTools/CMakeLists.txt
  2. 132
      src/Magnum/SceneTools/FlattenMeshHierarchy.cpp
  3. 95
      src/Magnum/SceneTools/FlattenMeshHierarchy.h
  4. 2
      src/Magnum/SceneTools/Test/CMakeLists.txt
  5. 415
      src/Magnum/SceneTools/Test/FlattenMeshHierarchyTest.cpp

2
src/Magnum/SceneTools/CMakeLists.txt
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@ -28,9 +28,11 @@ set(MagnumSceneTools_SRCS )
# Files compiled with different flags for main library and unit test library # Files compiled with different flags for main library and unit test library
set(MagnumSceneTools_GracefulAssert_SRCS set(MagnumSceneTools_GracefulAssert_SRCS
FlattenMeshHierarchy.cpp
OrderClusterParents.cpp) OrderClusterParents.cpp)
set(MagnumSceneTools_HEADERS set(MagnumSceneTools_HEADERS
FlattenMeshHierarchy.h
OrderClusterParents.h OrderClusterParents.h
SceneTools.h SceneTools.h

132
src/Magnum/SceneTools/FlattenMeshHierarchy.cpp
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/*
This file is part of Magnum.
Copyright © 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019,
2020, 2021 Vladimír Vondruš <mosra@centrum.cz>
Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and associated documentation files (the "Software"),
to deal in the Software without restriction, including without limitation
the rights to use, copy, modify, merge, publish, distribute, sublicense,
and/or sell copies of the Software, and to permit persons to whom the
Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included
in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.
*/
#include "FlattenMeshHierarchy.h"
#include <Corrade/Containers/Array.h>
#include <Corrade/Containers/GrowableArray.h>
#include <Corrade/Containers/Pair.h>
#include <Corrade/Containers/Triple.h>
#include "Magnum/DimensionTraits.h"
#include "Magnum/Math/Matrix3.h"
#include "Magnum/Math/Matrix4.h"
#include "Magnum/Trade/SceneData.h"
#include "Magnum/SceneTools/OrderClusterParents.h"
namespace Magnum { namespace SceneTools {
namespace {
template<UnsignedInt> struct SceneDataDimensionTraits;
template<> struct SceneDataDimensionTraits<2> {
static bool isDimensions(const Trade::SceneData& scene) {
return scene.is2D();
}
static Containers::Array<Containers::Pair<UnsignedInt, Matrix3>> transformationsAsArray(const Trade::SceneData& scene) {
return scene.transformations2DAsArray();
}
};
template<> struct SceneDataDimensionTraits<3> {
static bool isDimensions(const Trade::SceneData& scene) {
return scene.is3D();
}
static Containers::Array<Containers::Pair<UnsignedInt, Matrix4>> transformationsAsArray(const Trade::SceneData& scene) {
return scene.transformations3DAsArray();
}
};
template<UnsignedInt dimensions>
Containers::Array<Containers::Triple<UnsignedInt, Int, MatrixTypeFor<dimensions, Float>>> flattenMeshHierarchyImplementation(const Trade::SceneData& scene, const MatrixTypeFor<dimensions, Float>& globalTransformation) {
CORRADE_ASSERT(SceneDataDimensionTraits<dimensions>::isDimensions(scene),
"SceneTools::flattenMeshHierarchy(): the scene is not" << dimensions << Debug::nospace << "D", {});
CORRADE_ASSERT(scene.hasField(Trade::SceneField::Parent),
"SceneTools::flattenMeshHierarchy(): the scene has no hierarchy", {});
/* If there's no mesh field in the file, nothing to do. Another case is
that there is a mesh field but it's empty, then for simplicity we still
go through everything. */
if(!scene.hasField(Trade::SceneField::Mesh)) return {};
Containers::Array<Containers::Pair<UnsignedInt, Int>> orderedClusteredParents = orderClusterParents(scene);
/* Retrieve transformations of all objects, indexed by object ID. Since not
all nodes in the hierarchy may have a transformation assigned,
initialize the whole array to identity first. */
/** @todo switch to a hashmap eventually? */
Containers::Array<MatrixTypeFor<dimensions, Float>> absoluteTransformations{DefaultInit, scene.mappingBound() + 1};
absoluteTransformations[0] = globalTransformation;
/** @todo switch to *Into() in a loop to avoid temp allocations */
for(const Containers::Pair<UnsignedInt, MatrixTypeFor<dimensions, Float>>& transformation: SceneDataDimensionTraits<dimensions>::transformationsAsArray(scene)) {
CORRADE_INTERNAL_ASSERT(transformation.first() < scene.mappingBound());
absoluteTransformations[transformation.first() + 1] = transformation.second();
}
/* Turn the transformations into absolute */
for(const Containers::Pair<UnsignedInt, Int>& parentOffset: orderedClusteredParents) {
absoluteTransformations[parentOffset.first() + 1] =
absoluteTransformations[parentOffset.second() + 1]*
absoluteTransformations[parentOffset.first() + 1];
}
/* Allocate the output array, retrieve mesh & material IDs and assign
absolute transformations to each. The matrix location is abused for
object mapping, which is subsequently replaced by the absolute object
transformation for given mesh. */
/** @todo skip meshes that aren't part of the hierarchy once we have a
BitArray to efficiently mark what's in the hierarchy and what not */
Containers::Array<Containers::Triple<UnsignedInt, Int, MatrixTypeFor<dimensions, Float>>> out{NoInit, scene.fieldSize(Trade::SceneField::Mesh)};
Containers::StridedArrayView1D<UnsignedInt> meshes{out, &out.data()->first(), out.size(), sizeof(typename decltype(out)::Type)};
Containers::StridedArrayView1D<Int> meshMaterials{out, &out.data()->second(), out.size(), sizeof(typename decltype(out)::Type)};
Containers::StridedArrayView1D<MatrixTypeFor<dimensions, Float>> matrices{out, &out.data()->third(), out.size(), sizeof(typename decltype(out)::Type)};
Containers::StridedArrayView1D<UnsignedInt> mapping = Containers::arrayCast<UnsignedInt>(matrices);
scene.meshesMaterialsInto(mapping, meshes, meshMaterials);
for(std::size_t i = 0; i != out.size(); ++i) {
CORRADE_INTERNAL_ASSERT(mapping[i] < scene.mappingBound());
matrices[i] = absoluteTransformations[mapping[i] + 1];
}
return out;
}
}
Containers::Array<Containers::Triple<UnsignedInt, Int, Matrix3>> flattenMeshHierarchy2D(const Trade::SceneData& scene, const Matrix3& globalTransformation) {
return flattenMeshHierarchyImplementation<2>(scene, globalTransformation);
}
Containers::Array<Containers::Triple<UnsignedInt, Int, Matrix3>> flattenMeshHierarchy2D(const Trade::SceneData& scene) {
return flattenMeshHierarchyImplementation<2>(scene, {});
}
Containers::Array<Containers::Triple<UnsignedInt, Int, Matrix4>> flattenMeshHierarchy3D(const Trade::SceneData& scene, const Matrix4& globalTransformation) {
return flattenMeshHierarchyImplementation<3>(scene, globalTransformation);
}
Containers::Array<Containers::Triple<UnsignedInt, Int, Matrix4>> flattenMeshHierarchy3D(const Trade::SceneData& scene) {
return flattenMeshHierarchyImplementation<3>(scene, {});
}
}}

95
src/Magnum/SceneTools/FlattenMeshHierarchy.h
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#ifndef Magnum_SceneTools_FlattenMeshHierarchy_h
#define Magnum_SceneTools_FlattenMeshHierarchy_h
/*
This file is part of Magnum.
Copyright © 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019,
2020, 2021 Vladimír Vondruš <mosra@centrum.cz>
Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and associated documentation files (the "Software"),
to deal in the Software without restriction, including without limitation
the rights to use, copy, modify, merge, publish, distribute, sublicense,
and/or sell copies of the Software, and to permit persons to whom the
Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included
in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.
*/
/** @file
* @brief Function @ref Magnum::SceneTools::flattenMeshHierarchy2D(), @ref Magnum::SceneTools::flattenMeshHierarchy3D()
* @m_since_latest
*/
#include "Magnum/Magnum.h"
#include "Magnum/SceneTools/visibility.h"
#include "Magnum/Trade/Trade.h"
namespace Magnum { namespace SceneTools {
/**
@brief Flatten a 2D mesh hierarchy
@m_since_latest
For all @ref Trade::SceneField::Mesh entries that are a part of a hierarchy
returns a triple of mesh ID, @ref Trade::SceneField::MeshMaterial and its
absolute transformation in the scene with @p globalTransformation prepended.
The @ref Trade::SceneField::Parent field is expected to be contained in the
scene, having no cycles or duplicates, and the scene is expected to be 2D. If
@ref Trade::SceneField::Mesh is not present or is empty, returns an empty
array.
The operation is done in an @f$ \mathcal{O}(m + n) @f$ execution time and
memory complexity, with @f$ m @f$ being size of the @ref Trade::SceneField::Mesh
field and @f$ n @f$ being @ref Trade::SceneData::mappingBound(). The function
calls @ref orderClusterParents() internally.
@see @ref Trade::SceneData::hasField(), @ref Trade::SceneData::is2D()
*/
MAGNUM_SCENETOOLS_EXPORT Containers::Array<Containers::Triple<UnsignedInt, Int, Matrix3>> flattenMeshHierarchy2D(const Trade::SceneData& scene, const Matrix3& globalTransformation);
/** @overload
@m_since_latest
Same as above with @p globalTransformation set to an identity matrix.
*/
MAGNUM_SCENETOOLS_EXPORT Containers::Array<Containers::Triple<UnsignedInt, Int, Matrix3>> flattenMeshHierarchy2D(const Trade::SceneData& scene);
/**
@brief Flatten a 3D mesh hierarchy
@m_since_latest
For all @ref Trade::SceneField::Mesh entries that are a part of a hierarchy
returns a triple of mesh ID, @ref Trade::SceneField::MeshMaterial and its
absolute transformation in the scene with @p globalTransformation prepended.
The @ref Trade::SceneField::Parent field is expected to be contained in the
scene, having no cycles or duplicates, and the scene is expected to be 3D. If
@ref Trade::SceneField::Mesh is not present or is empty, returns an empty
array.
The operation is done in an @f$ \mathcal{O}(m + n) @f$ execution time and
memory complexity, with @f$ m @f$ being size of the @ref Trade::SceneField::Mesh
field and @f$ n @f$ being @ref Trade::SceneData::mappingBound(). The function
calls @ref orderClusterParents() internally.
@see @ref Trade::SceneData::hasField(), @ref Trade::SceneData::is3D()
*/
MAGNUM_SCENETOOLS_EXPORT Containers::Array<Containers::Triple<UnsignedInt, Int, Matrix4>> flattenMeshHierarchy3D(const Trade::SceneData& scene, const Matrix4& globalTransformation);
/** @overload
@m_since_latest
Same as above with @p globalTransformation set to an identity matrix.
*/
MAGNUM_SCENETOOLS_EXPORT Containers::Array<Containers::Triple<UnsignedInt, Int, Matrix4>> flattenMeshHierarchy3D(const Trade::SceneData& scene);
}}
#endif

2
src/Magnum/SceneTools/Test/CMakeLists.txt
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@ -25,10 +25,12 @@
corrade_add_test(SceneToolsCombineTest CombineTest.cpp LIBRARIES MagnumTrade) corrade_add_test(SceneToolsCombineTest CombineTest.cpp LIBRARIES MagnumTrade)
corrade_add_test(SceneToolsConvertToSingleFun___Test ConvertToSingleFunctionObjectsTest.cpp LIBRARIES MagnumTrade) corrade_add_test(SceneToolsConvertToSingleFun___Test ConvertToSingleFunctionObjectsTest.cpp LIBRARIES MagnumTrade)
corrade_add_test(SceneToolsFlattenMeshHierarchyTest FlattenMeshHierarchyTest.cpp LIBRARIES MagnumSceneToolsTestLib)
corrade_add_test(SceneToolsOrderClusterParentsTest OrderClusterParentsTest.cpp LIBRARIES MagnumSceneToolsTestLib) corrade_add_test(SceneToolsOrderClusterParentsTest OrderClusterParentsTest.cpp LIBRARIES MagnumSceneToolsTestLib)
set_target_properties( set_target_properties(
SceneToolsCombineTest SceneToolsCombineTest
SceneToolsConvertToSingleFun___Test SceneToolsConvertToSingleFun___Test
SceneToolsFlattenMeshHierarchyTest
SceneToolsOrderClusterParentsTest SceneToolsOrderClusterParentsTest
PROPERTIES FOLDER "Magnum/SceneTools/Test") PROPERTIES FOLDER "Magnum/SceneTools/Test")

415
src/Magnum/SceneTools/Test/FlattenMeshHierarchyTest.cpp
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@ -0,0 +1,415 @@
/*
This file is part of Magnum.
Copyright © 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019,
2020, 2021 Vladimír Vondruš <mosra@centrum.cz>
Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and associated documentation files (the "Software"),
to deal in the Software without restriction, including without limitation
the rights to use, copy, modify, merge, publish, distribute, sublicense,
and/or sell copies of the Software, and to permit persons to whom the
Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included
in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.
*/
#include <sstream>
#include <Corrade/Containers/Triple.h>
#include <Corrade/TestSuite/Tester.h>
#include <Corrade/TestSuite/Compare/Container.h>
#include <Corrade/Utility/DebugStl.h>
#include "Magnum/Math/Matrix3.h"
#include "Magnum/Math/Matrix4.h"
#include "Magnum/SceneTools/FlattenMeshHierarchy.h"
#include "Magnum/Trade/SceneData.h"
namespace Magnum { namespace SceneTools { namespace Test { namespace {
struct FlattenMeshHierarchyTest: TestSuite::Tester {
explicit FlattenMeshHierarchyTest();
void test2D();
void test3D();
void not2DNot3D();
void noParentField();
void noMeshField();
};
using namespace Math::Literals;
struct {
const char* name;
Matrix3 globalTransformation2D;
Matrix4 globalTransformation3D;
std::size_t parentsToExclude, transformationsToExclude, meshesToExclude;
std::size_t expectedOutputSize;
} TestData[]{
{"", {}, {},
0, 2, 3,
5},
{"global transformation",
Matrix3::scaling(Vector2{0.5f}), Matrix4::scaling(Vector3{0.5f}),
0, 2, 3,
5},
{"transformations not part of the hierarchy", {}, {},
0, 0, 3,
5},
{"meshes not part of the hierarchy", {}, {},
0, 2, 0,
5},
{"transformations and meshes not part of the hierarchy", {}, {},
0, 0, 0,
5},
{"no parents", {}, {},
9, 2, 3,
0},
{"no meshes", {}, {},
0, 2, 8,
0},
};
FlattenMeshHierarchyTest::FlattenMeshHierarchyTest() {
addInstancedTests({&FlattenMeshHierarchyTest::test2D,
&FlattenMeshHierarchyTest::test3D},
Containers::arraySize(TestData));
addTests({&FlattenMeshHierarchyTest::not2DNot3D,
&FlattenMeshHierarchyTest::noParentField,
&FlattenMeshHierarchyTest::noMeshField});
}
void FlattenMeshHierarchyTest::test2D() {
auto&& instanceData = TestData[testCaseInstanceId()];
setTestCaseDescription(instanceData.name);
struct Data {
/* Using smaller types to verify we don't have unnecessarily hardcoded
32-bit types */
struct Parent {
UnsignedShort object;
Byte parent;
} parents[9];
struct Transformation {
UnsignedShort object;
Matrix3 transformation;
} transforms[7];
struct Mesh {
UnsignedShort object;
UnsignedShort mesh;
Short meshMaterial;
} meshes[8];
} data[]{{
/*
Cases to test:
- leaf paths with no attachments which don't contribute to the
output in any way
- nodes with transforms but no meshes
- nodes with meshes but no transforms
- nodes with multiple meshes
- nodes with neither transforms nor meshes
- object 4 has a mesh with identity transform (or, rather, no
transformation entry at all)
- objects 2 and 16 have the same mesh attached with the exact
same transform -- this is a nonsense (they would overlap) and
as such isn't deduplicated in any way
- objects 0, 32 and 17 have transformations/meshes, but not part
of the hierarchy; these are cut away from the views in the
first test case to keep it simple
1T 4M
/ \ | 32M 0MM
5T 2TM 11
/ \ \ | 32T 17T
3MM 7T 6 16TM
*/
{{3, 5},
{11, 4},
{5, 1},
{1, -1},
{7, 5},
{6, 2},
{2, 1},
{4, -1},
{16, 11}},
{{2, Matrix3::scaling({3.0f, 5.0f})},
{1, Matrix3::translation({1.0f, -1.5f})},
/* Same absolute transform as node 2 */
{16, Matrix3::translation({1.0f, -1.5f})*
Matrix3::scaling({3.0f, 5.0f})},
{7, Matrix3::scaling({2.0f, 1.0f})},
{5, Matrix3::rotation(35.0_degf)},
/* These are not part of the hierarchy */
{32, Matrix3::translation({1.0f, 0.5f})},
{17, Matrix3::translation({2.0f, 1.0f})},
},
{{0, 262, 33},
{32, 155, 47},
{0, 127, -1},
/* The above are not part of the hierarchy */
{2, 113, 96},
{3, 266, 74},
{4, 525, 33},
{3, 422, -1},
{16, 113, 96}}
}};
Trade::SceneData scene{Trade::SceneMappingType::UnsignedShort, 33, {}, data, {
/* To verify it doesn't just pick the first field ever */
Trade::SceneFieldData{Trade::SceneField::Camera, Trade::SceneMappingType::UnsignedShort, nullptr, Trade::SceneFieldType::UnsignedInt, nullptr},
Trade::SceneFieldData{Trade::SceneField::Parent,
Containers::stridedArrayView(data->parents)
.slice(&Data::Parent::object)
.except(instanceData.parentsToExclude),
Containers::stridedArrayView(data->parents)
.slice(&Data::Parent::parent)
.except(instanceData.parentsToExclude)},
Trade::SceneFieldData{Trade::SceneField::Transformation,
Containers::stridedArrayView(data->transforms)
.slice(&Data::Transformation::object)
.except(instanceData.transformationsToExclude),
Containers::stridedArrayView(data->transforms)
.slice(&Data::Transformation::transformation)
.except(instanceData.transformationsToExclude)},
Trade::SceneFieldData{Trade::SceneField::Mesh,
Containers::stridedArrayView(data->meshes)
.slice(&Data::Mesh::object)
.suffix(instanceData.meshesToExclude),
Containers::stridedArrayView(data->meshes)
.slice(&Data::Mesh::mesh)
.suffix(instanceData.meshesToExclude)},
Trade::SceneFieldData{Trade::SceneField::MeshMaterial,
Containers::stridedArrayView(data->meshes)
.slice(&Data::Mesh::object)
.suffix(instanceData.meshesToExclude),
Containers::stridedArrayView(data->meshes)
.slice(&Data::Mesh::meshMaterial)
.suffix(instanceData.meshesToExclude)},
}};
Containers::Array<Containers::Triple<UnsignedInt, Int, Matrix3>> out;
/* To test the parameter-less overload also */
if(instanceData.globalTransformation2D != Matrix3{})
out = flattenMeshHierarchy2D(scene, instanceData.globalTransformation2D);
else
out = flattenMeshHierarchy2D(scene);
CORRADE_EXPECT_FAIL_IF(instanceData.meshesToExclude == 0 || instanceData.parentsToExclude != 0,
"Meshes that are not part of the hierarchy are not excluded at the moment.");
CORRADE_COMPARE_AS(out, (Containers::arrayView<Containers::Triple<UnsignedInt, Int, Matrix3>>({
{113, 96, instanceData.globalTransformation2D*
Matrix3::translation({1.0f, -1.5f})*
Matrix3::scaling({3.0f, 5.0f})},
{266, 74, instanceData.globalTransformation2D*
Matrix3::translation({1.0f, -1.5f})*
Matrix3::rotation(35.0_degf)},
{525, 33, instanceData.globalTransformation2D},
{422, -1, instanceData.globalTransformation2D*
Matrix3::translation({1.0f, -1.5f})*
Matrix3::rotation(35.0_degf)},
{113, 96, instanceData.globalTransformation2D*
Matrix3::translation({1.0f, -1.5f})*
Matrix3::scaling({3.0f, 5.0f})}
})).prefix(instanceData.expectedOutputSize), TestSuite::Compare::Container);
}
void FlattenMeshHierarchyTest::test3D() {
auto&& instanceData = TestData[testCaseInstanceId()];
setTestCaseDescription(instanceData.name);
/* Basically the same as test2D(), except that it has 3D transforms.
Putting both into the same test case would be a bit too nasty. */
struct Data {
/* Using smaller types to verify we don't have unnecessarily hardcoded
32-bit types */
struct Parent {
UnsignedShort object;
Byte parent;
} parents[9];
struct Transformation {
UnsignedShort object;
Matrix4 transformation;
} transforms[7];
struct Mesh {
UnsignedShort object;
UnsignedShort mesh;
Short meshMaterial;
} meshes[8];
} data[]{{
/*
Cases to test:
- leaf paths with no attachments which don't contribute to the
output in any way
- nodes with transforms but no meshes
- nodes with meshes but no transforms
- nodes with multiple meshes
- nodes with neither transforms nor meshes
- object 4 has a mesh with identity transform (or, rather, no
transformation entry at all)
- objects 2 and 16 have the same mesh attached with the exact
same transform -- this is a nonsense (they would overlap) and
as such isn't deduplicated in any way
- objects 0, 32 and 17 have transformations/meshes, but not part
of the hierarchy; these are cut away from the views in the
first test case to keep it simple
1T 4M
/ \ | 32M 0MM
5T 2TM 11
/ \ \ | 32T 17T
3MM 7T 6 16TM
*/
{{3, 5},
{11, 4},
{5, 1},
{1, -1},
{7, 5},
{6, 2},
{2, 1},
{4, -1},
{16, 11}},
{{2, Matrix4::scaling({3.0f, 5.0f, 2.0f})},
{1, Matrix4::translation({1.0f, -1.5f, 0.5f})},
/* Same absolute transform as node 2 */
{16, Matrix4::translation({1.0f, -1.5f, 0.5f})*
Matrix4::scaling({3.0f, 5.0f, 2.0f})},
{7, Matrix4::scaling({2.0f, 1.0f, 0.5f})},
{5, Matrix4::rotationZ(35.0_degf)},
/* These are not part of the hierarchy */
{32, Matrix4::translation({1.0f, 0.5f, 2.0f})},
{17, Matrix4::translation({2.0f, 1.0f, 4.0f})},
},
{{0, 262, 33},
{32, 155, 47},
{0, 127, -1},
/* The above are not part of the hierarchy */
{2, 113, 96},
{3, 266, 74},
{4, 525, 33},
{3, 422, -1},
{16, 113, 96}}
}};
Trade::SceneData scene{Trade::SceneMappingType::UnsignedShort, 33, {}, data, {
/* To verify it doesn't just pick the first field ever */
Trade::SceneFieldData{Trade::SceneField::Camera, Trade::SceneMappingType::UnsignedShort, nullptr, Trade::SceneFieldType::UnsignedInt, nullptr},
Trade::SceneFieldData{Trade::SceneField::Parent,
Containers::stridedArrayView(data->parents)
.slice(&Data::Parent::object)
.except(instanceData.parentsToExclude),
Containers::stridedArrayView(data->parents)
.slice(&Data::Parent::parent)
.except(instanceData.parentsToExclude)},
Trade::SceneFieldData{Trade::SceneField::Transformation,
Containers::stridedArrayView(data->transforms)
.slice(&Data::Transformation::object)
.except(instanceData.transformationsToExclude),
Containers::stridedArrayView(data->transforms)
.slice(&Data::Transformation::transformation)
.except(instanceData.transformationsToExclude)},
Trade::SceneFieldData{Trade::SceneField::Mesh,
Containers::stridedArrayView(data->meshes)
.slice(&Data::Mesh::object)
.suffix(instanceData.meshesToExclude),
Containers::stridedArrayView(data->meshes)
.slice(&Data::Mesh::mesh)
.suffix(instanceData.meshesToExclude)},
Trade::SceneFieldData{Trade::SceneField::MeshMaterial,
Containers::stridedArrayView(data->meshes)
.slice(&Data::Mesh::object)
.suffix(instanceData.meshesToExclude),
Containers::stridedArrayView(data->meshes)
.slice(&Data::Mesh::meshMaterial)
.suffix(instanceData.meshesToExclude)},
}};
Containers::Array<Containers::Triple<UnsignedInt, Int, Matrix4>> out;
/* To test the parameter-less overload also */
if(instanceData.globalTransformation3D != Matrix4{})
out = flattenMeshHierarchy3D(scene, instanceData.globalTransformation3D);
else
out = flattenMeshHierarchy3D(scene);
CORRADE_EXPECT_FAIL_IF(instanceData.meshesToExclude == 0 || instanceData.parentsToExclude != 0,
"Meshes that are not part of the hierarchy are not excluded at the moment.");
CORRADE_COMPARE_AS(out, (Containers::arrayView<Containers::Triple<UnsignedInt, Int, Matrix4>>({
{113, 96, instanceData.globalTransformation3D*
Matrix4::translation({1.0f, -1.5f, 0.5f})*
Matrix4::scaling({3.0f, 5.0f, 2.0f})},
{266, 74, instanceData.globalTransformation3D*
Matrix4::translation({1.0f, -1.5f, 0.5f})*
Matrix4::rotationZ(35.0_degf)},
{525, 33, instanceData.globalTransformation3D},
{422, -1, instanceData.globalTransformation3D*
Matrix4::translation({1.0f, -1.5f, 0.5f})*
Matrix4::rotationZ(35.0_degf)},
{113, 96, instanceData.globalTransformation3D*
Matrix4::translation({1.0f, -1.5f, 0.5f})*
Matrix4::scaling({3.0f, 5.0f, 2.0f})}
})).prefix(instanceData.expectedOutputSize), TestSuite::Compare::Container);
}
void FlattenMeshHierarchyTest::not2DNot3D() {
#ifdef CORRADE_NO_ASSERT
CORRADE_SKIP("CORRADE_NO_ASSERT defined, can't test assertions");
#endif
Trade::SceneData scene{Trade::SceneMappingType::UnsignedInt, 0, nullptr, {}};
std::ostringstream out;
Error redirectError{&out};
flattenMeshHierarchy2D(scene);
flattenMeshHierarchy3D(scene);
CORRADE_COMPARE(out.str(),
"SceneTools::flattenMeshHierarchy(): the scene is not 2D\n"
"SceneTools::flattenMeshHierarchy(): the scene is not 3D\n");
}
void FlattenMeshHierarchyTest::noParentField() {
#ifdef CORRADE_NO_ASSERT
CORRADE_SKIP("CORRADE_NO_ASSERT defined, can't test assertions");
#endif
Trade::SceneData scene{Trade::SceneMappingType::UnsignedInt, 0, nullptr, {
Trade::SceneFieldData{Trade::SceneField::Transformation, Trade::SceneMappingType::UnsignedInt, nullptr, Trade::SceneFieldType::Matrix3x3, nullptr}
}};
std::ostringstream out;
Error redirectError{&out};
flattenMeshHierarchy2D(scene);
CORRADE_COMPARE(out.str(),
"SceneTools::flattenMeshHierarchy(): the scene has no hierarchy\n");
}
void FlattenMeshHierarchyTest::noMeshField() {
Trade::SceneData scene{Trade::SceneMappingType::UnsignedInt, 0, nullptr, {
Trade::SceneFieldData{Trade::SceneField::Parent, Trade::SceneMappingType::UnsignedInt, nullptr, Trade::SceneFieldType::Int, nullptr},
Trade::SceneFieldData{Trade::SceneField::Transformation, Trade::SceneMappingType::UnsignedInt, nullptr, Trade::SceneFieldType::Matrix3x3, nullptr}
}};
/* This should not blow up, just return nothing */
CORRADE_COMPARE_AS(flattenMeshHierarchy2D(scene),
(Containers::ArrayView<const Containers::Triple<UnsignedInt, Int, Matrix3>>{}),
TestSuite::Compare::Container);
}
}}}}
CORRADE_TEST_MAIN(Magnum::SceneTools::Test::FlattenMeshHierarchyTest)
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