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168 lines
6.8 KiB
168 lines
6.8 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, 2024 |
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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 <Corrade/Containers/Array.h> |
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#include <Corrade/Containers/BitArray.h> |
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#include <Corrade/Containers/BitArrayView.h> |
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#include <Corrade/Containers/GrowableArray.h> |
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#include <Corrade/Containers/Pair.h> |
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#include <Corrade/Containers/Triple.h> |
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#include "Magnum/Math/Matrix3.h" |
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#include "Magnum/Math/Matrix4.h" |
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#include "Magnum/MeshTools/Concatenate.h" |
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#include "Magnum/MeshTools/Transform.h" |
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#include "Magnum/SceneTools/Filter.h" |
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#include "Magnum/SceneTools/Hierarchy.h" |
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#include "Magnum/Trade/SceneData.h" |
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#include "Magnum/Trade/MeshData.h" |
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#define DOXYGEN_ELLIPSIS(...) __VA_ARGS__ |
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using namespace Magnum; |
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/* Make sure the name doesn't conflict with any other snippets to avoid linker |
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warnings, unlike with `int main()` there now has to be a declaration to |
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avoid -Wmisssing-prototypes */ |
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void mainSceneTools(); |
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void mainSceneTools() { |
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{ |
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/* [filterFieldEntries-shared-mapping] */ |
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Trade::SceneData scene = DOXYGEN_ELLIPSIS(Trade::SceneData{{}, 0, nullptr, {}}); |
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Containers::BitArray transformationsToKeep = DOXYGEN_ELLIPSIS({}); |
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Containers::BitArray lightsToKeep = DOXYGEN_ELLIPSIS({}); |
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/* Mesh and MeshMaterial fields stay unchanged */ |
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Trade::SceneData filtered = SceneTools::filterFieldEntries(scene, { |
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{Trade::SceneField::Translation, transformationsToKeep}, |
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{Trade::SceneField::Rotation, transformationsToKeep}, |
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{Trade::SceneField::Light, lightsToKeep} |
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}); |
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/* [filterFieldEntries-shared-mapping] */ |
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} |
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{ |
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/* [absoluteFieldTransformations2D-mesh-concatenate] */ |
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Trade::SceneData scene = DOXYGEN_ELLIPSIS(Trade::SceneData{{}, 0, nullptr, {}}); |
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Containers::Array<Trade::MeshData> meshes = DOXYGEN_ELLIPSIS({}); |
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Containers::Array<Containers::Pair<UnsignedInt, Containers::Pair<UnsignedInt, Int>>> |
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meshesMaterials = scene.meshesMaterialsAsArray(); |
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Containers::Array<Matrix3> transformations = |
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SceneTools::absoluteFieldTransformations2D(scene, Trade::SceneField::Mesh); |
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/* Since a mesh can be referenced multiple times, we can't operate in-place */ |
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Containers::Array<Trade::MeshData> flattenedMeshes; |
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for(std::size_t i = 0; i != meshesMaterials.size(); ++i) { |
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arrayAppend(flattenedMeshes, MeshTools::transform2D( |
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meshes[meshesMaterials[i].second().first()], transformations[i])); |
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} |
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Trade::MeshData concatenated = MeshTools::concatenate(flattenedMeshes); |
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/* [absoluteFieldTransformations2D-mesh-concatenate] */ |
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} { |
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/* [absoluteFieldTransformations3D-mesh-concatenate] */ |
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Trade::SceneData scene = DOXYGEN_ELLIPSIS(Trade::SceneData{{}, 0, nullptr, {}}); |
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Containers::Array<Trade::MeshData> meshes = DOXYGEN_ELLIPSIS({}); |
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Containers::Array<Containers::Pair<UnsignedInt, Containers::Pair<UnsignedInt, Int>>> |
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meshesMaterials = scene.meshesMaterialsAsArray(); |
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Containers::Array<Matrix4> transformations = |
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SceneTools::absoluteFieldTransformations3D(scene, Trade::SceneField::Mesh); |
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/* Since a mesh can be referenced multiple times, we can't operate in-place */ |
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Containers::Array<Trade::MeshData> flattenedMeshes; |
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for(std::size_t i = 0; i != meshesMaterials.size(); ++i) { |
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arrayAppend(flattenedMeshes, MeshTools::transform3D( |
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meshes[meshesMaterials[i].second().first()], transformations[i])); |
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} |
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Trade::MeshData concatenated = MeshTools::concatenate(flattenedMeshes); |
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/* [absoluteFieldTransformations3D-mesh-concatenate] */ |
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} |
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{ |
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/* [childrenDepthFirst-extract-tree] */ |
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Trade::SceneData scene = DOXYGEN_ELLIPSIS(Trade::SceneData{{}, 0, nullptr, {}}); |
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Containers::Array<Containers::Pair<UnsignedInt, UnsignedInt>> childrenRanges = |
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SceneTools::childrenDepthFirst(scene); |
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/* Bit array of objects to keep from the scene */ |
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UnsignedInt objectToLookFor = DOXYGEN_ELLIPSIS(0); |
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Containers::BitArray objectsToKeep{ValueInit, std::size_t(scene.mappingBound())}; |
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/* Look for the object in the list */ |
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for(const Containers::Pair<UnsignedInt, UnsignedInt>& i: childrenRanges) { |
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if(i.first() != objectToLookFor) continue; |
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/* Right after the object appearing in the list is all its (nested) |
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children, mark them in the bit array */ |
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for(const Containers::Pair<UnsignedInt, UnsignedInt>& j: |
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childrenRanges.sliceSize(&i, i.second() + 1)) |
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objectsToKeep.set(j.first()); |
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break; |
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} |
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/* Filter the scene to contain just given object and its children, and reparent |
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it to be in scene root */ |
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Trade::SceneData filtered = SceneTools::filterObjects(scene, objectsToKeep); |
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filtered.mutableField<Int>(Trade::SceneField::Parent)[ |
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filtered.fieldObjectOffset(Trade::SceneField::Parent, objectToLookFor) |
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] = -1; |
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/* [childrenDepthFirst-extract-tree] */ |
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} |
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{ |
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/* [parentsBreadthFirst-transformations] */ |
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Trade::SceneData scene = DOXYGEN_ELLIPSIS(Trade::SceneData{{}, 0, nullptr, {}}); |
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/* Put all transformations into an array indexed by object ID. Objects |
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implicitly have an identity transformation, first element is reserved for |
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the global transformation. */ |
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Containers::Array<Matrix4> transformations{std::size_t(scene.mappingBound() + 1)}; |
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for(const Containers::Pair<UnsignedInt, Matrix4>& transformation: |
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scene.transformations3DAsArray()) |
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{ |
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transformations[transformation.first() + 1] = transformation.second(); |
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} |
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/* Go through ordered parents and compose absolute transformations for all |
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nodes in the hierarchy, objects in the root use transformations[0]. The |
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function ensures that the parent transformation is already calculated when |
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referenced by child nodes. */ |
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for(const Containers::Pair<UnsignedInt, Int>& parent: |
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SceneTools::parentsBreadthFirst(scene)) |
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{ |
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transformations[parent.first() + 1] = |
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transformations[parent.second() + 1]* |
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transformations[parent.first() + 1]; |
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} |
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/* [parentsBreadthFirst-transformations] */ |
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} |
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}
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