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291 lines
12 KiB
291 lines
12 KiB
/* |
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This file is part of Magnum. |
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Copyright © 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019 |
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Vladimír Vondruš <mosra@centrum.cz> |
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Permission is hereby granted, free of charge, to any person obtaining a |
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copy of this software and associated documentation files (the "Software"), |
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to deal in the Software without restriction, including without limitation |
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the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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and/or sell copies of the Software, and to permit persons to whom the |
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Software is furnished to do so, subject to the following conditions: |
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The above copyright notice and this permission notice shall be included |
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in all copies or substantial portions of the Software. |
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
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FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
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DEALINGS IN THE SOFTWARE. |
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*/ |
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#include "Compile.h" |
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#include <Corrade/Containers/StridedArrayView.h> |
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#include <Corrade/Containers/ArrayViewStl.h> /** @todo remove once MeshData is sane */ |
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#include "Magnum/GL/Buffer.h" |
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#include "Magnum/GL/Mesh.h" |
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#include "Magnum/Math/Vector3.h" |
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#include "Magnum/Math/Color.h" |
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#include "Magnum/MeshTools/CompressIndices.h" |
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#include "Magnum/MeshTools/GenerateNormals.h" |
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#include "Magnum/MeshTools/Duplicate.h" |
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#include "Magnum/MeshTools/Interleave.h" |
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#include "Magnum/Trade/MeshData2D.h" |
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#include "Magnum/Trade/MeshData3D.h" |
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/* This header is included only privately and doesn't introduce any linker |
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dependency, thus it's completely safe */ |
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#include "Magnum/Shaders/Generic.h" |
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namespace Magnum { namespace MeshTools { |
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GL::Mesh compile(const Trade::MeshData2D& meshData) { |
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GL::Mesh mesh; |
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mesh.setPrimitive(meshData.primitive()); |
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/* Decide about stride and offsets */ |
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UnsignedInt stride = sizeof(Shaders::Generic2D::Position::Type); |
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UnsignedInt textureCoordsOffset = sizeof(Shaders::Generic2D::Position::Type); |
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UnsignedInt colorsOffset = sizeof(Shaders::Generic2D::Position::Type); |
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if(meshData.hasTextureCoords2D()) { |
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stride += sizeof(Shaders::Generic2D::TextureCoordinates::Type); |
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colorsOffset += sizeof(Shaders::Generic2D::TextureCoordinates::Type); |
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} |
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if(meshData.hasColors()) |
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stride += sizeof(Shaders::Generic2D::Color4::Type); |
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/* Create vertex buffer */ |
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GL::Buffer vertexBuffer{GL::Buffer::TargetHint::Array}; |
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GL::Buffer vertexBufferRef = GL::Buffer::wrap(vertexBuffer.id(), GL::Buffer::TargetHint::Array); |
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/* Interleave positions and put them in with ownership transfer, use the |
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ref for the rest */ |
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Containers::Array<char> data = MeshTools::interleave( |
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meshData.positions(0), |
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stride - sizeof(Shaders::Generic2D::Position::Type)); |
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mesh.addVertexBuffer(std::move(vertexBuffer), 0, |
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Shaders::Generic2D::Position(), |
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stride - sizeof(Shaders::Generic2D::Position::Type)); |
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/* Add also texture coordinates, if present */ |
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if(meshData.hasTextureCoords2D()) { |
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MeshTools::interleaveInto(data, |
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textureCoordsOffset, |
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meshData.textureCoords2D(0), |
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stride - textureCoordsOffset - sizeof(Shaders::Generic2D::TextureCoordinates::Type)); |
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mesh.addVertexBuffer(vertexBufferRef, 0, |
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textureCoordsOffset, |
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Shaders::Generic2D::TextureCoordinates(), |
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stride - textureCoordsOffset - sizeof(Shaders::Generic2D::TextureCoordinates::Type)); |
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} |
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/* Add also colors, if present */ |
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if(meshData.hasColors()) { |
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MeshTools::interleaveInto(data, |
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colorsOffset, |
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meshData.colors(0), |
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stride - colorsOffset - sizeof(Shaders::Generic3D::Color4::Type)); |
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mesh.addVertexBuffer(vertexBufferRef, 0, |
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colorsOffset, |
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Shaders::Generic3D::Color4(), |
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stride - colorsOffset - sizeof(Shaders::Generic3D::Color4::Type)); |
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} |
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/* Fill vertex buffer with interleaved data */ |
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vertexBufferRef.setData(data, GL::BufferUsage::StaticDraw); |
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/* If indexed, fill index buffer and configure indexed mesh */ |
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if(meshData.isIndexed()) { |
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Containers::Array<char> indexData; |
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MeshIndexType indexType; |
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UnsignedInt indexStart, indexEnd; |
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std::tie(indexData, indexType, indexStart, indexEnd) = MeshTools::compressIndices(meshData.indices()); |
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GL::Buffer indexBuffer{GL::Buffer::TargetHint::ElementArray}; |
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indexBuffer.setData(indexData, GL::BufferUsage::StaticDraw); |
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mesh.setCount(meshData.indices().size()) |
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.setIndexBuffer(std::move(indexBuffer), 0, indexType, indexStart, indexEnd); |
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/* Else set vertex count */ |
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} else mesh.setCount(meshData.positions(0).size()); |
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return mesh; |
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} |
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#ifdef MAGNUM_BUILD_DEPRECATED |
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std::tuple<GL::Mesh, std::unique_ptr<GL::Buffer>, std::unique_ptr<GL::Buffer>> compile(const Trade::MeshData2D& meshData, GL::BufferUsage) { |
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return std::make_tuple(compile(meshData), |
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std::unique_ptr<GL::Buffer>{new GL::Buffer{NoCreate}}, |
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std::unique_ptr<GL::Buffer>{meshData.isIndexed() ? new GL::Buffer{NoCreate} : nullptr}); |
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} |
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#endif |
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GL::Mesh compile(const Trade::MeshData3D& meshData, CompileFlags flags) { |
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GL::Mesh mesh; |
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mesh.setPrimitive(meshData.primitive()); |
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const bool generateNormals = flags & (CompileFlag::GenerateFlatNormals|CompileFlag::GenerateSmoothNormals) && meshData.primitive() == MeshPrimitive::Triangles; |
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/* Decide about stride and offsets */ |
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UnsignedInt stride = sizeof(Shaders::Generic3D::Position::Type); |
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const UnsignedInt normalOffset = sizeof(Shaders::Generic3D::Position::Type); |
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UnsignedInt textureCoordsOffset = sizeof(Shaders::Generic3D::Position::Type); |
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UnsignedInt colorsOffset = sizeof(Shaders::Generic3D::Position::Type); |
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if(meshData.hasNormals() || generateNormals) { |
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stride += sizeof(Shaders::Generic3D::Normal::Type); |
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textureCoordsOffset += sizeof(Shaders::Generic3D::Normal::Type); |
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colorsOffset += sizeof(Shaders::Generic3D::Normal::Type); |
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} |
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if(meshData.hasTextureCoords2D()) { |
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stride += sizeof(Shaders::Generic3D::TextureCoordinates::Type); |
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colorsOffset += sizeof(Shaders::Generic3D::TextureCoordinates::Type); |
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} |
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if(meshData.hasColors()) |
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stride += sizeof(Shaders::Generic3D::Color4::Type); |
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/* Create vertex buffer */ |
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GL::Buffer vertexBuffer{GL::Buffer::TargetHint::Array}; |
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GL::Buffer vertexBufferRef = GL::Buffer::wrap(vertexBuffer.id(), GL::Buffer::TargetHint::Array); |
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/* Indirect reference to the mesh data -- either directly the original mesh |
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data or processed ones */ |
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Containers::StridedArrayView1D<const Vector3> positions; |
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Containers::StridedArrayView1D<const Vector3> normals; |
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Containers::StridedArrayView1D<const Vector2> textureCoords2D; |
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Containers::StridedArrayView1D<const Color4> colors; |
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bool useIndices; /**< @todo turn into a view once compressIndices() takes views */ |
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/* If the mesh has no normals, we want to generate them and the mesh is an |
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indexed triangle mesh, duplicate all attributes, otherwise just |
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reference the original data */ |
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Containers::Array<Vector3> positionStorage; |
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Containers::Array<Vector3> normalStorage; |
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Containers::Array<Vector2> textureCoords2DStorage; |
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Containers::Array<Color4> colorStorage; |
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if(generateNormals) { |
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/* If we want flat normals and the mesh is indexed, duplicate all |
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attributes */ |
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if(flags & CompileFlag::GenerateFlatNormals && meshData.isIndexed()) { |
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positionStorage = duplicate( |
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Containers::stridedArrayView(meshData.indices()), Containers::stridedArrayView(meshData.positions(0))); |
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positions = Containers::arrayView(positionStorage); |
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if(meshData.hasTextureCoords2D()) { |
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textureCoords2DStorage = duplicate( |
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Containers::stridedArrayView(meshData.indices()), |
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Containers::stridedArrayView(meshData.textureCoords2D(0))); |
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textureCoords2D = Containers::arrayView(textureCoords2DStorage); |
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} |
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if(meshData.hasColors()) { |
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colorStorage = duplicate( |
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Containers::stridedArrayView(meshData.indices()), |
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Containers::stridedArrayView(meshData.colors(0))); |
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colors = Containers::arrayView(colorStorage); |
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} |
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} else { |
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positions = meshData.positions(0); |
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if(meshData.hasTextureCoords2D()) |
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textureCoords2D = meshData.textureCoords2D(0); |
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if(meshData.hasColors()) |
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colors = meshData.colors(0); |
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} |
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if(flags & CompileFlag::GenerateFlatNormals || !meshData.isIndexed()) { |
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normalStorage = generateFlatNormals(positions); |
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useIndices = false; |
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} else { |
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normalStorage = generateSmoothNormals<UnsignedInt>(meshData.indices(), positions); |
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useIndices = true; |
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} |
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normals = Containers::arrayView(normalStorage); |
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} else { |
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positions = meshData.positions(0); |
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if(meshData.hasNormals()) normals = meshData.normals(0); |
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if(meshData.hasTextureCoords2D()) textureCoords2D = meshData.textureCoords2D(0); |
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if(meshData.hasColors()) colors = meshData.colors(0); |
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useIndices = meshData.isIndexed(); |
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} |
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/* Interleave positions and put them in with ownership transfer, use the |
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ref for the rest */ |
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Containers::Array<char> data = MeshTools::interleave( |
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positions, |
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stride - sizeof(Shaders::Generic3D::Position::Type)); |
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mesh.addVertexBuffer(std::move(vertexBuffer), 0, |
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Shaders::Generic3D::Position(), |
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stride - sizeof(Shaders::Generic3D::Position::Type)); |
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/* Add also normals, if present */ |
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if(normals) { |
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MeshTools::interleaveInto(data, |
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normalOffset, |
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normals, |
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stride - normalOffset - sizeof(Shaders::Generic3D::Normal::Type)); |
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mesh.addVertexBuffer(vertexBufferRef, 0, |
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normalOffset, |
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Shaders::Generic3D::Normal(), |
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stride - normalOffset - sizeof(Shaders::Generic3D::Normal::Type)); |
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} |
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/* Add also texture coordinates, if present */ |
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if(textureCoords2D) { |
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MeshTools::interleaveInto(data, |
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textureCoordsOffset, |
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textureCoords2D, |
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stride - textureCoordsOffset - sizeof(Shaders::Generic3D::TextureCoordinates::Type)); |
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mesh.addVertexBuffer(vertexBufferRef, 0, |
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textureCoordsOffset, |
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Shaders::Generic3D::TextureCoordinates(), |
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stride - textureCoordsOffset - sizeof(Shaders::Generic3D::TextureCoordinates::Type)); |
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} |
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/* Add also colors, if present */ |
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if(colors) { |
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MeshTools::interleaveInto(data, |
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colorsOffset, |
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colors, |
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stride - colorsOffset - sizeof(Shaders::Generic3D::Color4::Type)); |
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mesh.addVertexBuffer(vertexBufferRef, 0, |
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colorsOffset, |
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Shaders::Generic3D::Color4(), |
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stride - colorsOffset - sizeof(Shaders::Generic3D::Color4::Type)); |
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} |
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/* Fill vertex buffer with interleaved data */ |
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vertexBufferRef.setData(data, GL::BufferUsage::StaticDraw); |
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/* If indexed (and the mesh didn't have the vertex data duplicated for flat |
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normals), fill index buffer and configure indexed mesh */ |
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if(useIndices) { |
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Containers::Array<char> indexData; |
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MeshIndexType indexType; |
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UnsignedInt indexStart, indexEnd; |
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std::tie(indexData, indexType, indexStart, indexEnd) = MeshTools::compressIndices(meshData.indices()); |
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GL::Buffer indexBuffer{GL::Buffer::TargetHint::ElementArray}; |
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indexBuffer.setData(indexData, GL::BufferUsage::StaticDraw); |
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mesh.setCount(meshData.indices().size()) |
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.setIndexBuffer(std::move(indexBuffer), 0, indexType, indexStart, indexEnd); |
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/* Else set vertex count */ |
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} else mesh.setCount(positions.size()); |
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return mesh; |
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} |
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#ifdef MAGNUM_BUILD_DEPRECATED |
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std::tuple<GL::Mesh, std::unique_ptr<GL::Buffer>, std::unique_ptr<GL::Buffer>> compile(const Trade::MeshData3D& meshData, GL::BufferUsage) { |
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return std::make_tuple(compile(meshData), |
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std::unique_ptr<GL::Buffer>{new GL::Buffer{NoCreate}}, |
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std::unique_ptr<GL::Buffer>{meshData.isIndexed() ? new GL::Buffer{NoCreate} : nullptr}); |
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} |
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#endif |
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}}
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