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85 lines
4.7 KiB
85 lines
4.7 KiB
4 years ago
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/*
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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 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 "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/Implementation/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& lineMesh) {
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Trade::MeshData mesh = Implementation::generateLines(lineMesh);
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#ifdef CORRADE_GRACEFUL_ASSERT
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/* If it asserted inside, bail */
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if(!mesh.attributeCount()) return GL::Mesh{};
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#endif
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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 = lineMesh.findAttributeId(Trade::MeshAttribute::TextureCoordinates))
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Warning{} << "MeshTools::compileLines():" << lineMesh.attributeName(*id) << "conflicts with line annotation attribute, ignoring";
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if(const Containers::Optional<UnsignedInt> id = lineMesh.findAttributeId(Trade::MeshAttribute::Tangent))
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Warning{} << "MeshTools::compileLines():" << lineMesh.attributeName(*id) << "conflicts with line previous position attribute, ignoring";
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if(const Containers::Optional<UnsignedInt> id = lineMesh.findAttributeId(Trade::MeshAttribute::Normal))
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Warning{} << "MeshTools::compileLines():" << lineMesh.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::MeshAttributePreviousPosition),
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mesh.attributeStride(Implementation::MeshAttributePreviousPosition),
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GL::DynamicAttribute{Shaders::LineGL3D::PreviousPosition{}, mesh.attributeFormat(Implementation::MeshAttributePreviousPosition)});
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out.addVertexBuffer(vertices,
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mesh.attributeOffset(Implementation::MeshAttributeNextPosition),
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mesh.attributeStride(Implementation::MeshAttributeNextPosition),
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GL::DynamicAttribute{Shaders::LineGL3D::NextPosition{}, mesh.attributeFormat(Implementation::MeshAttributeNextPosition)});
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out.addVertexBuffer(std::move(vertices),
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mesh.attributeOffset(Implementation::MeshAttributeAnnotation),
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mesh.attributeStride(Implementation::MeshAttributeAnnotation),
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GL::DynamicAttribute{Shaders::LineGL3D::Annotation{}, mesh.attributeFormat(Implementation::MeshAttributeAnnotation)});
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return out;
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}
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}}
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