cloudViewer::visualization::rendering::TGaussianSplatBuffersBuilder Class Reference

#include <FilamentGeometryBuffersBuilder.h>

Inheritance diagram for cloudViewer::visualization::rendering::TGaussianSplatBuffersBuilder:

Collaboration diagram for cloudViewer::visualization::rendering::TGaussianSplatBuffersBuilder:

Public Member Functions
	TGaussianSplatBuffersBuilder (const t::geometry::PointCloud &geometry)
	Constructs a TGaussianSplatBuffersBuilder object. More...
Buffers	ConstructBuffers () override
	Constructs vertex and index buffers for Gaussian Splat rendering. More...
Public Member Functions inherited from cloudViewer::visualization::rendering::TPointCloudBuffersBuilder
	TPointCloudBuffersBuilder (const t::geometry::PointCloud &geometry)
filament::RenderableManager::PrimitiveType	GetPrimitiveType () const override
filament::Box	ComputeAABB () override
Public Member Functions inherited from cloudViewer::visualization::rendering::GeometryBuffersBuilder
virtual	~GeometryBuffersBuilder ()=default
virtual void	SetDownsampleThreshold (size_t min_points)
virtual void	SetWideLines ()
virtual void	SetAdjustColorsForSRGBToneMapping (bool adjust)

Additional Inherited Members
Public Types inherited from cloudViewer::visualization::rendering::GeometryBuffersBuilder
using	Buffers = std::tuple< VertexBufferHandle, IndexBufferHandle, IndexBufferHandle >
using	IndexType = std::uint32_t
Static Public Member Functions inherited from cloudViewer::visualization::rendering::GeometryBuffersBuilder
static std::unique_ptr< GeometryBuffersBuilder >	GetBuilder (const ccHObject &geometry)
static std::unique_ptr< GeometryBuffersBuilder >	GetBuilder (const t::geometry::Geometry &geometry)
Static Protected Member Functions inherited from cloudViewer::visualization::rendering::GeometryBuffersBuilder
static void	DeallocateBuffer (void *buffer, size_t size, void *user_ptr)
static IndexBufferHandle	CreateIndexBuffer (size_t max_index, size_t n_subsamples=SIZE_MAX)
Protected Attributes inherited from cloudViewer::visualization::rendering::TPointCloudBuffersBuilder
t::geometry::PointCloud	geometry_
Protected Attributes inherited from cloudViewer::visualization::rendering::GeometryBuffersBuilder
size_t	downsample_threshold_ = SIZE_MAX
bool	wide_lines_ = false
bool	adjust_colors_for_srgb_tonemapping_ = true

Detailed Description

Definition at line 182 of file FilamentGeometryBuffersBuilder.h.

Constructor & Destructor Documentation

TGaussianSplatBuffersBuilder()

cloudViewer::visualization::rendering::TGaussianSplatBuffersBuilder::TGaussianSplatBuffersBuilder ( const t::geometry::PointCloud &  geometry )

explicit

Constructs a TGaussianSplatBuffersBuilder object.

Initializes the Gaussian Splat buffers from the provided geometry and ensures that all necessary attributes are present and correctly formatted. If the geometry is not a Gaussian Splat, a warning is issued. Additionally, attributes like "f_dc", "opacity", "rot", "scale", and "f_rest" are checked for their data type, and converted to Float32 if they are not already in that format.

Definition at line 40 of file GaussianSplatBuffers.cpp.

References cloudViewer::core::Float32, cloudViewer::visualization::rendering::TPointCloudBuffersBuilder::geometry_, cloudViewer::t::geometry::PointCloud::GetPointAttr(), cloudViewer::t::geometry::PointCloud::HasPointAttr(), and LogWarning.

Member Function Documentation

ConstructBuffers()

GeometryBuffersBuilder::Buffers cloudViewer::visualization::rendering::TGaussianSplatBuffersBuilder::ConstructBuffers ( )

overridevirtual

Constructs vertex and index buffers for Gaussian Splat rendering.

This function creates and configures GPU buffers to represent a Gaussian Splat point cloud. It extracts attributes like positions, colors, rotation, scale, and spherical harmonics coefficients from the provided geometry_ and organizes them into separate vertex buffer attributes.

The vertex buffer contains the following attributes:

• POSITION: Vertex positions (FLOAT3)
• COLOR: DC component and opacity (FLOAT4)
• TANGENTS: Rotation quaternion (FLOAT4)
• CUSTOM0: Scale (FLOAT4)
• CUSTOM1 to CUSTOM6: SH coefficients (FLOAT4)

Each attribute is checked and converted to the expected data type if necessary, and missing attributes are initialized with default values.

Reimplemented from cloudViewer::visualization::rendering::TPointCloudBuffersBuilder.

Definition at line 63 of file GaussianSplatBuffers.cpp.

References cloudViewer::utility::ceil(), cloudViewer::visualization::rendering::GeometryBuffersBuilder::CreateIndexBuffer(), cloudViewer::visualization::rendering::GeometryBuffersBuilder::DeallocateBuffer(), cloudViewer::visualization::rendering::GeometryBuffersBuilder::downsample_threshold_, cloudViewer::t::geometry::PointCloud::GaussianSplatGetSHOrder(), cloudViewer::visualization::rendering::TPointCloudBuffersBuilder::geometry_, cloudViewer::visualization::rendering::EngineInstance::GetInstance(), cloudViewer::t::geometry::PointCloud::GetPointAttr(), cloudViewer::t::geometry::PointCloud::GetPointPositions(), cloudViewer::visualization::rendering::EngineInstance::GetResourceManager(), LogWarning, points, and cloudViewer::visualization::rendering::VertexBuffer.

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The documentation for this class was generated from the following files:

• /root/ACloudViewer/libs/cloudViewer/visualization/rendering/filament/FilamentGeometryBuffersBuilder.h
• /root/ACloudViewer/libs/cloudViewer/visualization/rendering/filament/GaussianSplatBuffers.cpp