Rémi Verschelde
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commit
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3 changed files with 1298 additions and 846 deletions
4
thirdparty/README.md
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thirdparty/README.md
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@ -683,12 +683,12 @@ File extracted from upstream release tarball:
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## xatlas
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- Upstream: https://github.com/jpcy/xatlas
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- Version: git (5571fc7ef0d06832947c0a935ccdcf083f7a9264, 2020)
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- Version: git (ec707faeac3b95e6b416076a9509718cce105b6a, 2021)
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- License: MIT
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Files extracted from upstream source:
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- `xatlas.{cpp,h}`
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- `source/xatlas/xatlas.{cpp,h}`
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- `LICENSE`
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1852
thirdparty/xatlas/xatlas.cpp
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1852
thirdparty/xatlas/xatlas.cpp
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36
thirdparty/xatlas/xatlas.h
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36
thirdparty/xatlas/xatlas.h
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@ -36,7 +36,8 @@ Copyright NVIDIA Corporation 2006 -- Ignacio Castano <icastano@nvidia.com>
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namespace xatlas {
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enum class ChartType {
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enum class ChartType
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{
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Planar,
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Ortho,
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LSCM,
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@ -45,7 +46,8 @@ enum class ChartType {
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};
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// A group of connected faces, belonging to a single atlas.
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struct Chart {
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struct Chart
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{
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uint32_t *faceArray;
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uint32_t atlasIndex; // Sub-atlas index.
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uint32_t faceCount;
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@ -54,7 +56,8 @@ struct Chart {
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};
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// Output vertex.
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struct Vertex {
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struct Vertex
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{
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int32_t atlasIndex; // Sub-atlas index. -1 if the vertex doesn't exist in any atlas.
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int32_t chartIndex; // -1 if the vertex doesn't exist in any chart.
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float uv[2]; // Not normalized - values are in Atlas width and height range.
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@ -62,7 +65,8 @@ struct Vertex {
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};
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// Output mesh.
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struct Mesh {
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struct Mesh
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{
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Chart *chartArray;
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uint32_t *indexArray;
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Vertex *vertexArray;
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@ -77,7 +81,8 @@ static const uint32_t kImageIsBilinearBit = 0x40000000;
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static const uint32_t kImageIsPaddingBit = 0x20000000;
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// Empty on creation. Populated after charts are packed.
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struct Atlas {
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struct Atlas
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{
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uint32_t *image;
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Mesh *meshes; // The output meshes, corresponding to each AddMesh call.
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float *utilization; // Normalized atlas texel utilization array. E.g. a value of 0.8 means 20% empty space. atlasCount in length.
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@ -94,13 +99,15 @@ Atlas *Create();
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void Destroy(Atlas *atlas);
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enum class IndexFormat {
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enum class IndexFormat
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{
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UInt16,
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UInt32
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};
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// Input mesh declaration.
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struct MeshDecl {
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struct MeshDecl
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{
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const void *vertexPositionData = nullptr;
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const void *vertexNormalData = nullptr; // optional
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const void *vertexUvData = nullptr; // optional. The input UVs are provided as a hint to the chart generator.
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@ -131,7 +138,8 @@ struct MeshDecl {
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float epsilon = 1.192092896e-07F;
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};
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enum class AddMeshError {
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enum class AddMeshError
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{
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Success, // No error.
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Error, // Unspecified error.
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IndexOutOfRange, // An index is >= MeshDecl vertexCount.
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@ -145,7 +153,8 @@ AddMeshError AddMesh(Atlas *atlas, const MeshDecl &meshDecl, uint32_t meshCountH
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// Wait for AddMesh async processing to finish. ComputeCharts / Generate call this internally.
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void AddMeshJoin(Atlas *atlas);
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struct UvMeshDecl {
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struct UvMeshDecl
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{
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const void *vertexUvData = nullptr;
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const void *indexData = nullptr; // optional
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const uint32_t *faceMaterialData = nullptr; // Optional. Overlapping UVs should be assigned a different material. Must be indexCount / 3 in length.
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@ -161,7 +170,8 @@ AddMeshError AddUvMesh(Atlas *atlas, const UvMeshDecl &decl);
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// Custom parameterization function. texcoords initial values are an orthogonal parameterization.
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typedef void (*ParameterizeFunc)(const float *positions, float *texcoords, uint32_t vertexCount, const uint32_t *indices, uint32_t indexCount);
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struct ChartOptions {
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struct ChartOptions
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{
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ParameterizeFunc paramFunc = nullptr;
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float maxChartArea = 0.0f; // Don't grow charts to be larger than this. 0 means no limit.
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@ -184,7 +194,8 @@ struct ChartOptions {
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// Call after all AddMesh calls. Can be called multiple times to recompute charts with different options.
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void ComputeCharts(Atlas *atlas, ChartOptions options = ChartOptions());
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struct PackOptions {
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struct PackOptions
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{
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// Charts larger than this will be scaled down. 0 means no limit.
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uint32_t maxChartSize = 0;
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@ -227,7 +238,8 @@ void PackCharts(Atlas *atlas, PackOptions packOptions = PackOptions());
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void Generate(Atlas *atlas, ChartOptions chartOptions = ChartOptions(), PackOptions packOptions = PackOptions());
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// Progress tracking.
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enum class ProgressCategory {
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enum class ProgressCategory
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{
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AddMesh,
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ComputeCharts,
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PackCharts,
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