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xatlas: Sync with upstream ec707faea

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ec707faeac
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Rémi Verschelde 2021-11-19 12:58:56 +01:00
parent 42f8bfaff0
commit 0b84b26b2e
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3 changed files with 1298 additions and 846 deletions
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4
thirdparty/README.md vendored
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@ -683,12 +683,12 @@ File extracted from upstream release tarball:
## xatlas
- Upstream: https://github.com/jpcy/xatlas
- Version: git (5571fc7ef0d06832947c0a935ccdcf083f7a9264, 2020)
- Version: git (ec707faeac3b95e6b416076a9509718cce105b6a, 2021)
- License: MIT
Files extracted from upstream source:
- `xatlas.{cpp,h}`
- `source/xatlas/xatlas.{cpp,h}`
- `LICENSE`

2104
thirdparty/xatlas/xatlas.cpp vendored
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36
thirdparty/xatlas/xatlas.h vendored
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@ -36,7 +36,8 @@ Copyright NVIDIA Corporation 2006 -- Ignacio Castano <icastano@nvidia.com>
namespace xatlas {
enum class ChartType {
enum class ChartType
{
Planar,
Ortho,
LSCM,
@ -45,7 +46,8 @@ enum class ChartType {
};
// A group of connected faces, belonging to a single atlas.
struct Chart {
struct Chart
{
uint32_t *faceArray;
uint32_t atlasIndex; // Sub-atlas index.
uint32_t faceCount;
@ -54,7 +56,8 @@ struct Chart {
};
// Output vertex.
struct Vertex {
struct Vertex
{
int32_t atlasIndex; // Sub-atlas index. -1 if the vertex doesn't exist in any atlas.
int32_t chartIndex; // -1 if the vertex doesn't exist in any chart.
float uv[2]; // Not normalized - values are in Atlas width and height range.
@ -62,7 +65,8 @@ struct Vertex {
};
// Output mesh.
struct Mesh {
struct Mesh
{
Chart *chartArray;
uint32_t *indexArray;
Vertex *vertexArray;
@ -77,7 +81,8 @@ static const uint32_t kImageIsBilinearBit = 0x40000000;
static const uint32_t kImageIsPaddingBit = 0x20000000;
// Empty on creation. Populated after charts are packed.
struct Atlas {
struct Atlas
{
uint32_t *image;
Mesh *meshes; // The output meshes, corresponding to each AddMesh call.
float *utilization; // Normalized atlas texel utilization array. E.g. a value of 0.8 means 20% empty space. atlasCount in length.
@ -94,13 +99,15 @@ Atlas *Create();
void Destroy(Atlas *atlas);
enum class IndexFormat {
enum class IndexFormat
{
UInt16,
UInt32
};
// Input mesh declaration.
struct MeshDecl {
struct MeshDecl
{
const void *vertexPositionData = nullptr;
const void *vertexNormalData = nullptr; // optional
const void *vertexUvData = nullptr; // optional. The input UVs are provided as a hint to the chart generator.
@ -131,7 +138,8 @@ struct MeshDecl {
float epsilon = 1.192092896e-07F;
};
enum class AddMeshError {
enum class AddMeshError
{
Success, // No error.
Error, // Unspecified error.
IndexOutOfRange, // An index is >= MeshDecl vertexCount.
@ -145,7 +153,8 @@ AddMeshError AddMesh(Atlas *atlas, const MeshDecl &meshDecl, uint32_t meshCountH
// Wait for AddMesh async processing to finish. ComputeCharts / Generate call this internally.
void AddMeshJoin(Atlas *atlas);
struct UvMeshDecl {
struct UvMeshDecl
{
const void *vertexUvData = nullptr;
const void *indexData = nullptr; // optional
const uint32_t *faceMaterialData = nullptr; // Optional. Overlapping UVs should be assigned a different material. Must be indexCount / 3 in length.
@ -161,7 +170,8 @@ AddMeshError AddUvMesh(Atlas *atlas, const UvMeshDecl &decl);
// Custom parameterization function. texcoords initial values are an orthogonal parameterization.
typedef void (*ParameterizeFunc)(const float *positions, float *texcoords, uint32_t vertexCount, const uint32_t *indices, uint32_t indexCount);
struct ChartOptions {
struct ChartOptions
{
ParameterizeFunc paramFunc = nullptr;
float maxChartArea = 0.0f; // Don't grow charts to be larger than this. 0 means no limit.
@ -184,7 +194,8 @@ struct ChartOptions {
// Call after all AddMesh calls. Can be called multiple times to recompute charts with different options.
void ComputeCharts(Atlas *atlas, ChartOptions options = ChartOptions());
struct PackOptions {
struct PackOptions
{
// Charts larger than this will be scaled down. 0 means no limit.
uint32_t maxChartSize = 0;
@ -227,7 +238,8 @@ void PackCharts(Atlas *atlas, PackOptions packOptions = PackOptions());
void Generate(Atlas *atlas, ChartOptions chartOptions = ChartOptions(), PackOptions packOptions = PackOptions());
// Progress tracking.
enum class ProgressCategory {
enum class ProgressCategory
{
AddMesh,
ComputeCharts,
PackCharts,