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MeshTools: tools for generating index buffers out of various primitives.

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Vladimír Vondruš 6 years ago
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  1. 6
      doc/changelog.dox
  2. 4
      src/Magnum/Mesh.h
  3. 2
      src/Magnum/MeshTools/CMakeLists.txt
  4. 146
      src/Magnum/MeshTools/GenerateIndices.cpp
  5. 132
      src/Magnum/MeshTools/GenerateIndices.h
  6. 2
      src/Magnum/MeshTools/Test/CMakeLists.txt
  7. 264
      src/Magnum/MeshTools/Test/GenerateIndicesTest.cpp

6
doc/changelog.dox
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@ -150,6 +150,12 @@ See also:
into per-vertex
- New @ref MeshTools::concatenate() and @ref MeshTools::concatenateInto()
tool for batching multiple generic meshes together
- New family of @ref MeshTools::generateLineStripIndices(),
@ref MeshTools::generateLineLoopIndices(),
@ref MeshTools::generateTriangleStripIndices() and
@ref MeshTools::generateTriangleFanIndices() utilities for converting
various mesh types to plain indexed @ref MeshPrimitive::Lines and
@ref MeshPrimitive::Triangles
@subsubsection changelog-latest-new-platform Platform libraries

4
src/Magnum/Mesh.h
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@ -89,6 +89,7 @@ enum class MeshPrimitive: UnsignedInt {
*
* Corresponds to @ref GL::MeshPrimitive::LineLoop. Not supported on
* Vulkan, D3D or Metal.
* @see @ref MeshTools::generateLineLoopIndices()
*/
LineLoop,
@ -101,6 +102,7 @@ enum class MeshPrimitive: UnsignedInt {
* @m_class{m-doc-external} [D3D_PRIMITIVE_TOPOLOGY_LINESTRIP](https://docs.microsoft.com/en-us/windows/win32/api/d3dcommon/ne-d3dcommon-d3d_primitive_topology)
* or @m_class{m-doc-external} [MTLPrimitiveTypeLineStrip](https://developer.apple.com/documentation/metal/mtlprimitivetype/mtlprimitivetypelinestrip?language=objc).
* @m_keywords{D3D_PRIMITIVE_TOPOLOGY_LINESTRIP MTLPrimitiveTypeLineStrip}
* @see @ref MeshTools::generateLineStripIndices()
*/
LineStrip,
@ -124,6 +126,7 @@ enum class MeshPrimitive: UnsignedInt {
* @m_class{m-doc-external} [D3D_PRIMITIVE_TOPOLOGY_TRIANGLESTRIP](https://docs.microsoft.com/en-us/windows/win32/api/d3dcommon/ne-d3dcommon-d3d_primitive_topology)
* or @m_class{m-doc-external} [MTLPrimitiveTypeTriangleStrip](https://developer.apple.com/documentation/metal/mtlprimitivetype/mtlprimitivetypetrianglestrip?language=objc).
* @m_keywords{D3D_PRIMITIVE_TOPOLOGY_TRIANGLESTRIP MTLPrimitiveTypeTriangleStrip}
* @see @ref MeshTools::generateTriangleStripIndices()
*/
TriangleStrip,
@ -134,6 +137,7 @@ enum class MeshPrimitive: UnsignedInt {
* Corresponds to @ref GL::MeshPrimitive::TriangleFan /
* @def_vk_keyword{PRIMITIVE_TOPOLOGY_TRIANGLE_FAN,PrimitiveTopology}. Not
* supported on D3D or Metal.
* @see @ref MeshTools::generateTriangleFanIndices()
*/
TriangleFan,

2
src/Magnum/MeshTools/CMakeLists.txt
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@ -34,6 +34,7 @@ set(MagnumMeshTools_GracefulAssert_SRCS
Concatenate.cpp
Duplicate.cpp
FlipNormals.cpp
GenerateIndices.cpp
GenerateNormals.cpp
Interleave.cpp
RemoveDuplicates.cpp)
@ -44,6 +45,7 @@ set(MagnumMeshTools_HEADERS
Concatenate.h
Duplicate.h
FlipNormals.h
GenerateIndices.h
GenerateNormals.h
Interleave.h
RemoveDuplicates.h

146
src/Magnum/MeshTools/GenerateIndices.cpp
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@ -0,0 +1,146 @@
/*
This file is part of Magnum.
Copyright © 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019
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 "GenerateIndices.h"
#include <Corrade/Containers/Array.h>
#include <Corrade/Containers/StridedArrayView.h>
namespace Magnum { namespace MeshTools {
void generateLineStripIndicesInto(const UnsignedInt vertexCount, const Containers::StridedArrayView1D<UnsignedInt>& indices) {
CORRADE_ASSERT(vertexCount >= 2,
"MeshTools::generateLineStripIndicesInto(): expected at least two vertices, got" << vertexCount, );
CORRADE_ASSERT(indices.size() == 2*(vertexCount - 1),
"MeshTools::generateLineStripIndicesInto(): bad output size, expected" << 2*(vertexCount - 1) << "but got" << indices.size(), );
/*
1 --- 2 1 2 --- 3 4
/ \ / \
/ \ => / \
/ \ / \
0 3 0 5
*/
for(std::size_t i = 0; i != vertexCount - 1; ++i) {
indices[i*2 + 0] = i;
indices[i*2 + 1] = i + 1;
}
}
Containers::Array<UnsignedInt> generateLineStripIndices(const UnsignedInt vertexCount) {
Containers::Array<UnsignedInt> indices{Containers::NoInit, 2*(vertexCount - 1)};
generateLineStripIndicesInto(vertexCount, indices);
return indices;
}
void generateLineLoopIndicesInto(const UnsignedInt vertexCount, const Containers::StridedArrayView1D<UnsignedInt>& indices) {
CORRADE_ASSERT(vertexCount >= 2,
"MeshTools::generateLineLoopIndicesInto(): expected at least two vertices, got" << vertexCount, );
CORRADE_ASSERT(indices.size() == 2*vertexCount,
"MeshTools::generateLineLoopIndicesInto(): bad output size, expected" << 2*vertexCount << "but got" << indices.size(), );
/*
Same as with line strip, with one additional line segment at the end.
1 --- 2 1 2 --- 3 4
/ \ / \
/ \ => / \
/ \ / \
0 ----------- 3 0 7 ----------- 6 5
*/
for(std::size_t i = 0; i != vertexCount - 1; ++i) {
indices[i*2 + 0] = i;
indices[i*2 + 1] = i + 1;
}
indices[2*vertexCount - 2] = vertexCount - 1;
indices[2*vertexCount - 1] = 0;
}
Containers::Array<UnsignedInt> generateLineLoopIndices(const UnsignedInt vertexCount) {
Containers::Array<UnsignedInt> indices{Containers::NoInit, 2*vertexCount};
generateLineLoopIndicesInto(vertexCount, indices);
return indices;
}
void generateTriangleStripIndicesInto(const UnsignedInt vertexCount, const Containers::StridedArrayView1D<UnsignedInt>& indices) {
CORRADE_ASSERT(vertexCount >= 3,
"MeshTools::generateTriangleStripIndicesInto(): expected at least three vertices, got" << vertexCount, );
CORRADE_ASSERT(indices.size() == 3*(vertexCount - 2),
"MeshTools::generateTriangleStripIndicesInto(): bad output size, expected" << 3*(vertexCount - 2) << "but got" << indices.size(), );
/*
Triangles starting with odd vertices (marked with !) have the first two
indices swapped to preserve winding.
0 ----- 2 ----- 4 0 ----- 2 3 6 ----- 8 9
\ / \ / \ \ / / \ \ / / \
\ / \ / \ => \ / / \ \ / / \
\ / \ / \ \ / / ! \ \ / / ! \
1 ----- 3 ----- 5 1 4 ----- 5 7 10 ---- 11
*/
for(std::size_t i = 0; i != vertexCount - 2; ++i) {
indices[i*3 + 0] = i % 2 ? i + 1 : i;
indices[i*3 + 1] = i % 2 ? i : i + 1;
indices[i*3 + 2] = i + 2;
}
}
Containers::Array<UnsignedInt> generateTriangleStripIndices(const UnsignedInt vertexCount) {
Containers::Array<UnsignedInt> indices{Containers::NoInit, 3*(vertexCount - 2)};
generateTriangleStripIndicesInto(vertexCount, indices);
return indices;
}
void generateTriangleFanIndicesInto(const UnsignedInt vertexCount, const Containers::StridedArrayView1D<UnsignedInt>& indices) {
CORRADE_ASSERT(vertexCount >= 3,
"MeshTools::generateTriangleFanIndicesInto(): expected at least three vertices, got" << vertexCount, );
CORRADE_ASSERT(indices.size() == 3*(vertexCount - 2),
"MeshTools::generateTriangleFanIndicesInto(): bad output size, expected" << 3*(vertexCount - 2) << "but got" << indices.size(), );
/* 10 8 ----- 7 5
4 ----- 3 / \ \ / / \
/ \ / \ / \ \ / / \
/ \ / \ / \ \ / / \
/ \ / \ 11 ----- 9 6 3 ----- 4
5 ----- 0 ----- 2 => 0 ----- 2
\ / \ /
\ / \ /
\ / \ /
1 1
*/
for(std::size_t i = 0; i != vertexCount - 2; ++i) {
indices[i*3 + 0] = 0;
indices[i*3 + 1] = i + 1;
indices[i*3 + 2] = i + 2;
}
}
Containers::Array<UnsignedInt> generateTriangleFanIndices(const UnsignedInt vertexCount) {
Containers::Array<UnsignedInt> indices{Containers::NoInit, 3*(vertexCount - 2)};
generateTriangleFanIndicesInto(vertexCount, indices);
return indices;
}
}}

132
src/Magnum/MeshTools/GenerateIndices.h
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@ -0,0 +1,132 @@
#ifndef Magnum_MeshTools_GenerateIndices_h
#define Magnum_MeshTools_GenerateIndices_h
/*
This file is part of Magnum.
Copyright © 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019
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::MeshTools::generateLineStripIndices(), @ref Magnum::MeshTools::generateLineStripIndicesInto(), @ref Magnum::MeshTools::generateLineLoopIndices(), @ref Magnum::MeshTools::generateLineLoopIndicesInto(), @ref Magnum::MeshTools::generateTriangleStripIndices(), @ref Magnum::MeshTools::generateTriangleStripIndicesInto(), @ref Magnum::MeshTools::generateTriangleFanIndices(), @ref Magnum::MeshTools::generateTriangleFanIndicesInto()
* @m_since_latest
*/
#include "Magnum/Magnum.h"
#include "Magnum/MeshTools/visibility.h"
namespace Magnum { namespace MeshTools {
/**
@brief Create index buffer for a line strip primitive
@m_since_latest
Can be used to convert a @ref MeshPrimitive::LineStrip mesh to
@ref MeshPrimitive::Lines. The @p vertexCount is expected to be at least
@cpp 2 @ce. Primitive restart is not supported.
@see @ref generateLineStripIndicesInto(), @ref generateLineLoopIndices(),
@ref generateTriangleStripIndices(), @ref generateTriangleFanIndices()
*/
MAGNUM_MESHTOOLS_EXPORT Containers::Array<UnsignedInt> generateLineStripIndices(UnsignedInt vertexCount);
/**
@brief Create index buffer for a line strip primitive into an existing array
@m_since_latest
A variant of @ref generateLineStripIndicesInto() that fills existing memory
instead of allocating a new array. The @p vertexCount is expected to be at
least @cpp 2 @ce, the @p indices array is expected to have a size of
@cpp 2*(vertexCount - 1) @ce. Primitive restart is not supported.
*/
MAGNUM_MESHTOOLS_EXPORT void generateLineStripIndicesInto(UnsignedInt vertexCount, const Containers::StridedArrayView1D<UnsignedInt>& indices);
/**
@brief Create index buffer for a line loop primitive
@m_since_latest
Can be used to convert a @ref MeshPrimitive::LineLoop mesh to
@ref MeshPrimitive::Lines. The @p vertexCount is expected to be at least
@cpp 2 @ce. Primitive restart is not supported.
@see @ref generateLineLoopIndicesInto(), @ref generateLineStripIndices(),
@ref generateTriangleStripIndices(), @ref generateTriangleFanIndices()
*/
MAGNUM_MESHTOOLS_EXPORT Containers::Array<UnsignedInt> generateLineLoopIndices(UnsignedInt vertexCount);
/**
@brief Create index buffer for a line loop primitive into an existing array
@m_since_latest
A variant of @ref generateLineLoopIndicesInto() that fills existing memory
instead of allocating a new array. The @p vertexCount is expected to be at
least @cpp 2 @ce, the @p indices array is expected to have a size of
@cpp 2*vertexCount @ce. Primitive restart is not supported.
*/
MAGNUM_MESHTOOLS_EXPORT void generateLineLoopIndicesInto(UnsignedInt vertexCount, const Containers::StridedArrayView1D<UnsignedInt>& into);
/**
@brief Create index buffer for a triangle strip primitive
@m_since_latest
Can be used to convert a @ref MeshPrimitive::TriangleStrip mesh to
@ref MeshPrimitive::Triangles. The @p vertexCount is expected to be at least
@cpp 3 @ce. Primitive restart is not supported.
@see @ref generateTriangleStripIndicesInto(), @ref generateLineStripIndices(),
@ref generateLineLoopIndices(), @ref generateTriangleFanIndices()
*/
MAGNUM_MESHTOOLS_EXPORT Containers::Array<UnsignedInt> generateTriangleStripIndices(UnsignedInt vertexCount);
/**
@brief Create index buffer for a triangle strip primitive into an existing array
@m_since_latest
A variant of @ref generateTriangleStripIndicesInto() that fills existing memory
instead of allocating a new array. The @p vertexCount is expected to be at
least @cpp 3 @ce, the @p indices array is expected to have a size of
@cpp 3*(vertexCount - 2) @ce. Primitive restart is not supported.
*/
MAGNUM_MESHTOOLS_EXPORT void generateTriangleStripIndicesInto(UnsignedInt vertexCount, const Containers::StridedArrayView1D<UnsignedInt>& into);
/**
@brief Create index buffer for a triangle fan primitive
@m_since_latest
Can be used to convert a @ref MeshPrimitive::TriangleFan mesh to
@ref MeshPrimitive::Triangles. The @p vertexCount is expected to be at least
@cpp 3 @ce. Primitive restart is not supported.
@see @ref generateTriangleFanIndicesInto(), @ref generateLineStripIndices(),
@ref generateLineLoopIndices(), @ref generateTriangleStripIndices()
*/
MAGNUM_MESHTOOLS_EXPORT Containers::Array<UnsignedInt> generateTriangleFanIndices(UnsignedInt vertexCount);
/**
@brief Create index buffer for a triangle fan primitive into an existing array
@m_since_latest
A variant of @ref generateTriangleFanIndicesInto() that fills existing memory
instead of allocating a new array. The @p vertexCount is expected to be at
least @cpp 3 @ce, the @p indices array is expected to have a size of
@cpp 3*(vertexCount - 2) @ce. Primitive restart is not supported.
*/
MAGNUM_MESHTOOLS_EXPORT void generateTriangleFanIndicesInto(UnsignedInt vertexCount, const Containers::StridedArrayView1D<UnsignedInt>& into);
}}
#endif

2
src/Magnum/MeshTools/Test/CMakeLists.txt
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@ -28,6 +28,7 @@ corrade_add_test(MeshToolsCompressIndicesTest CompressIndicesTest.cpp LIBRARIES
corrade_add_test(MeshToolsConcatenateTest ConcatenateTest.cpp LIBRARIES MagnumMeshToolsTestLib)
corrade_add_test(MeshToolsDuplicateTest DuplicateTest.cpp LIBRARIES MagnumMeshToolsTestLib)
corrade_add_test(MeshToolsFlipNormalsTest FlipNormalsTest.cpp LIBRARIES MagnumMeshToolsTestLib)
corrade_add_test(MeshToolsGenerateIndicesTest GenerateIndicesTest.cpp LIBRARIES MagnumMeshToolsTestLib)
corrade_add_test(MeshToolsGenerateNormalsTest GenerateNormalsTest.cpp LIBRARIES MagnumMeshToolsTestLib MagnumPrimitives)
corrade_add_test(MeshToolsInterleaveTest InterleaveTest.cpp LIBRARIES MagnumMeshToolsTestLib)
corrade_add_test(MeshToolsRemoveDuplicatesTest RemoveDuplicatesTest.cpp LIBRARIES MagnumMeshToolsTestLib)
@ -51,6 +52,7 @@ set_target_properties(
MeshToolsConcatenateTest
MeshToolsDuplicateTest
MeshToolsFlipNormalsTest
MeshToolsGenerateIndicesTest
MeshToolsGenerateNormalsTest
MeshToolsInterleaveTest
MeshToolsRemoveDuplicatesTest

264
src/Magnum/MeshTools/Test/GenerateIndicesTest.cpp
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@ -0,0 +1,264 @@
/*
This file is part of Magnum.
Copyright © 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019
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/Array.h>
#include <Corrade/Containers/StridedArrayView.h>
#include <Corrade/TestSuite/Tester.h>
#include <Corrade/TestSuite/Compare/Container.h>
#include <Corrade/Utility/DebugStl.h>
#include "Magnum/MeshTools/GenerateIndices.h"
namespace Magnum { namespace MeshTools { namespace Test { namespace {
struct GenerateIndicesTest: TestSuite::Tester {
explicit GenerateIndicesTest();
void generateLineStripIndices();
void generateLineStripIndicesWrongVertexCount();
void generateLineStripIndicesIntoWrongSize();
void generateLineLoopIndices();
void generateLineLoopIndicesWrongVertexCount();
void generateLineLoopIndicesIntoWrongSize();
void generateTriangleStripIndices();
void generateTriangleStripIndicesWrongVertexCount();
void generateTriangleStripIndicesIntoWrongSize();
void generateTriangleFanIndices();
void generateTriangleFanIndicesWrongVertexCount();
void generateTriangleFanIndicesIntoWrongSize();
};
GenerateIndicesTest::GenerateIndicesTest() {
addTests({&GenerateIndicesTest::generateLineStripIndices,
&GenerateIndicesTest::generateLineStripIndicesWrongVertexCount,
&GenerateIndicesTest::generateLineStripIndicesIntoWrongSize,
&GenerateIndicesTest::generateLineLoopIndices,
&GenerateIndicesTest::generateLineLoopIndicesWrongVertexCount,
&GenerateIndicesTest::generateLineLoopIndicesIntoWrongSize,
&GenerateIndicesTest::generateTriangleStripIndices,
&GenerateIndicesTest::generateTriangleStripIndicesWrongVertexCount,
&GenerateIndicesTest::generateTriangleStripIndicesIntoWrongSize,
&GenerateIndicesTest::generateTriangleFanIndices,
&GenerateIndicesTest::generateTriangleFanIndicesWrongVertexCount,
&GenerateIndicesTest::generateTriangleFanIndicesIntoWrongSize});
}
void GenerateIndicesTest::generateLineStripIndices() {
/* Minimal input */
CORRADE_COMPARE_AS(MeshTools::generateLineStripIndices(2),
Containers::arrayView<UnsignedInt>({
0, 1
}), TestSuite::Compare::Container);
/* Odd */
CORRADE_COMPARE_AS(MeshTools::generateLineStripIndices(5),
Containers::arrayView<UnsignedInt>({
0, 1,
1, 2,
2, 3,
3, 4
}), TestSuite::Compare::Container);
/* Even */
CORRADE_COMPARE_AS(MeshTools::generateLineStripIndices(6),
Containers::arrayView<UnsignedInt>({
0, 1,
1, 2,
2, 3,
3, 4,
4, 5
}), TestSuite::Compare::Container);
}
void GenerateIndicesTest::generateLineStripIndicesWrongVertexCount() {
std::ostringstream out;
Error redirectError{&out};
MeshTools::generateLineStripIndicesInto(1, nullptr);
CORRADE_COMPARE(out.str(),
"MeshTools::generateLineStripIndicesInto(): expected at least two vertices, got 1\n");
}
void GenerateIndicesTest::generateLineStripIndicesIntoWrongSize() {
UnsignedInt indices[7];
std::ostringstream out;
Error redirectError{&out};
MeshTools::generateLineStripIndicesInto(5, indices);
CORRADE_COMPARE(out.str(),
"MeshTools::generateLineStripIndicesInto(): bad output size, expected 8 but got 7\n");
}
void GenerateIndicesTest::generateLineLoopIndices() {
/* Minimal input */
CORRADE_COMPARE_AS(MeshTools::generateLineLoopIndices(2),
Containers::arrayView<UnsignedInt>({
0, 1,
1, 0
}), TestSuite::Compare::Container);
/* Odd */
CORRADE_COMPARE_AS(MeshTools::generateLineLoopIndices(5),
Containers::arrayView<UnsignedInt>({
0, 1,
1, 2,
2, 3,
3, 4,
4, 0
}), TestSuite::Compare::Container);
/* Even */
CORRADE_COMPARE_AS(MeshTools::generateLineLoopIndices(6),
Containers::arrayView<UnsignedInt>({
0, 1,
1, 2,
2, 3,
3, 4,
4, 5,
5, 0
}), TestSuite::Compare::Container);
}
void GenerateIndicesTest::generateLineLoopIndicesWrongVertexCount() {
std::ostringstream out;
Error redirectError{&out};
MeshTools::generateLineLoopIndicesInto(1, nullptr);
CORRADE_COMPARE(out.str(),
"MeshTools::generateLineLoopIndicesInto(): expected at least two vertices, got 1\n");
}
void GenerateIndicesTest::generateLineLoopIndicesIntoWrongSize() {
UnsignedInt indices[9];
std::ostringstream out;
Error redirectError{&out};
MeshTools::generateLineLoopIndicesInto(5, indices);
CORRADE_COMPARE(out.str(),
"MeshTools::generateLineLoopIndicesInto(): bad output size, expected 10 but got 9\n");
}
void GenerateIndicesTest::generateTriangleStripIndices() {
/* Minimal input */
CORRADE_COMPARE_AS(MeshTools::generateTriangleStripIndices(3),
Containers::arrayView<UnsignedInt>({
0, 1, 2
}), TestSuite::Compare::Container);
/* Odd */
CORRADE_COMPARE_AS(MeshTools::generateTriangleStripIndices(7),
Containers::arrayView<UnsignedInt>({
0, 1, 2,
2, 1, 3, /* Reversed */
2, 3, 4,
4, 3, 5, /* Reversed */
4, 5, 6
}), TestSuite::Compare::Container);
/* Even */
CORRADE_COMPARE_AS(MeshTools::generateTriangleStripIndices(8),
Containers::arrayView<UnsignedInt>({
0, 1, 2,
2, 1, 3, /* Reversed */
2, 3, 4,
4, 3, 5, /* Reversed */
4, 5, 6,
6, 5, 7 /* Reversed */
}), TestSuite::Compare::Container);
}
void GenerateIndicesTest::generateTriangleStripIndicesWrongVertexCount() {
std::ostringstream out;
Error redirectError{&out};
MeshTools::generateTriangleStripIndicesInto(2, nullptr);
CORRADE_COMPARE(out.str(),
"MeshTools::generateTriangleStripIndicesInto(): expected at least three vertices, got 2\n");
}
void GenerateIndicesTest::generateTriangleStripIndicesIntoWrongSize() {
UnsignedInt indices[8];
std::ostringstream out;
Error redirectError{&out};
MeshTools::generateTriangleStripIndicesInto(5, indices);
CORRADE_COMPARE(out.str(),
"MeshTools::generateTriangleStripIndicesInto(): bad output size, expected 9 but got 8\n");
}
void GenerateIndicesTest::generateTriangleFanIndices() {
/* Minimal input */
CORRADE_COMPARE_AS(MeshTools::generateTriangleFanIndices(3),
Containers::arrayView<UnsignedInt>({
0, 1, 2
}), TestSuite::Compare::Container);
/* Odd */
CORRADE_COMPARE_AS(MeshTools::generateTriangleFanIndices(7),
Containers::arrayView<UnsignedInt>({
0, 1, 2,
0, 2, 3,
0, 3, 4,
0, 4, 5,
0, 5, 6
}), TestSuite::Compare::Container);
/* Even */
CORRADE_COMPARE_AS(MeshTools::generateTriangleFanIndices(8),
Containers::arrayView<UnsignedInt>({
0, 1, 2,
0, 2, 3,
0, 3, 4,
0, 4, 5,
0, 5, 6,
0, 6, 7
}), TestSuite::Compare::Container);
}
void GenerateIndicesTest::generateTriangleFanIndicesWrongVertexCount() {
std::ostringstream out;
Error redirectError{&out};
MeshTools::generateTriangleFanIndicesInto(2, nullptr);
CORRADE_COMPARE(out.str(),
"MeshTools::generateTriangleFanIndicesInto(): expected at least three vertices, got 2\n");
}
void GenerateIndicesTest::generateTriangleFanIndicesIntoWrongSize() {
UnsignedInt indices[8];
std::ostringstream out;
Error redirectError{&out};
MeshTools::generateTriangleFanIndicesInto(5, indices);
CORRADE_COMPARE(out.str(),
"MeshTools::generateTriangleFanIndicesInto(): bad output size, expected 9 but got 8\n");
}
}}}}
CORRADE_TEST_MAIN(Magnum::MeshTools::Test::GenerateIndicesTest)
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