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89 lines
5.1 KiB
89 lines
5.1 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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2020, 2021, 2022, 2023 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 "CompileLines.h" |
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#include <Corrade/Containers/Optional.h> |
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#include "Magnum/GL/Buffer.h" |
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#include "Magnum/GL/Mesh.h" |
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#include "Magnum/MeshTools/Compile.h" |
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#include "Magnum/MeshTools/GenerateLines.h" |
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/* This header is included only privately and doesn't introduce any linker |
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dependency (taking just the PreviousPosition, NextPosition and Annotation |
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attribute typedefs), thus it's completely safe to not link to the Shaders |
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library */ |
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#include "Magnum/Shaders/LineGL.h" |
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namespace Magnum { namespace MeshTools { |
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GL::Mesh compileLines(const Trade::MeshData& mesh) { |
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/* The assertion checks might be a bit excessive but the custom attributes |
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*may* conflict with some other user-defined ones so better rule that out |
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as much as possible */ |
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CORRADE_ASSERT( |
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mesh.primitive() == MeshPrimitive::Triangles && |
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mesh.hasAttribute(Implementation::LineMeshAttributePreviousPosition) && |
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mesh.hasAttribute(Implementation::LineMeshAttributeNextPosition) && |
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mesh.hasAttribute(Implementation::LineMeshAttributeAnnotation), |
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"MeshTools::compileLines(): the mesh wasn't produced with generateLines()", GL::Mesh{}); |
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/* Upload the buffers, bind the line-specific attributes manually */ |
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GL::Buffer indices{GL::Buffer::TargetHint::ElementArray, mesh.indexData()}; |
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GL::Buffer vertices{GL::Buffer::TargetHint::Array, mesh.vertexData()}; |
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GL::Mesh out = compile(mesh, std::move(indices), vertices); |
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/* Warn about attributes that are conflicting with line-specific attributes |
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and thus will get overwritten */ |
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static_assert(Shaders::GenericGL3D::TextureCoordinates::Location == UnsignedInt(Shaders::LineGL3D::Annotation::Location), ""); |
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static_assert(Shaders::GenericGL3D::Tangent::Location == UnsignedInt(Shaders::LineGL3D::PreviousPosition::Location), ""); |
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static_assert(Shaders::GenericGL3D::Normal::Location == UnsignedInt(Shaders::LineGL3D::NextPosition::Location), ""); |
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if(const Containers::Optional<UnsignedInt> id = mesh.findAttributeId(Trade::MeshAttribute::TextureCoordinates)) |
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Warning{} << "MeshTools::compileLines():" << mesh.attributeName(*id) << "conflicts with line annotation attribute, ignoring"; |
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if(const Containers::Optional<UnsignedInt> id = mesh.findAttributeId(Trade::MeshAttribute::Tangent)) |
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Warning{} << "MeshTools::compileLines():" << mesh.attributeName(*id) << "conflicts with line previous position attribute, ignoring"; |
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if(const Containers::Optional<UnsignedInt> id = mesh.findAttributeId(Trade::MeshAttribute::Normal)) |
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Warning{} << "MeshTools::compileLines():" << mesh.attributeName(*id) << "conflicts with line next position attribute, ignoring"; |
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/* PreviousPosition / NextPosition are bound to the same location in both |
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2D and 3D, using the 3D variant so it can be trimmed to just two |
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components in 2D (which wouldn't be possible the other way around) */ |
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out.addVertexBuffer(vertices, |
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mesh.attributeOffset(Implementation::LineMeshAttributePreviousPosition), |
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mesh.attributeStride(Implementation::LineMeshAttributePreviousPosition), |
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GL::DynamicAttribute{Shaders::LineGL3D::PreviousPosition{}, mesh.attributeFormat(Implementation::LineMeshAttributePreviousPosition)}); |
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out.addVertexBuffer(vertices, |
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mesh.attributeOffset(Implementation::LineMeshAttributeNextPosition), |
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mesh.attributeStride(Implementation::LineMeshAttributeNextPosition), |
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GL::DynamicAttribute{Shaders::LineGL3D::NextPosition{}, mesh.attributeFormat(Implementation::LineMeshAttributeNextPosition)}); |
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out.addVertexBuffer(std::move(vertices), |
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mesh.attributeOffset(Implementation::LineMeshAttributeAnnotation), |
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mesh.attributeStride(Implementation::LineMeshAttributeAnnotation), |
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GL::DynamicAttribute{Shaders::LineGL3D::Annotation{}, mesh.attributeFormat(Implementation::LineMeshAttributeAnnotation)}); |
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return out; |
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} |
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}}
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