Class GSplatsBuilder

Builder for gsplats test data.

Mirrors PointsBuilder. Required attributes are centers, amplitudes, and choleskyFactors. The Cholesky packing follows the lower-triangular layout used by the rest of the viewer: ndim*(ndim+1)/2 floats per splat.

Example

const gs = new GSplatsBuilder()
  .withSplats(200)
  .withDimensions(3)
  .withRandomCenters()
  .withAmplitudes(1.0)
  .withIsotropicCovariance(0.05)
  .build();

Index

Constructors

constructor

new GSplatsBuilder(): GSplatsBuilder

Returns GSplatsBuilder

Properties

`Private`numSplats

numSplats: number = 100

`Private`dimensions

dimensions: number = 3

`Private`centers

centers: Float32Array<ArrayBufferLike> | null = null

`Private`amplitudes

amplitudes: Float32Array<ArrayBufferLike> | null = null

`Private`choleskyFactors

choleskyFactors: Float32Array<ArrayBufferLike> | null = null

`Private`colors

colors: Float32Array<ArrayBufferLike> | null = null

Methods

withSplats

withSplats(num: number): this
Set the number of splats.
Parameters
- num: number
Returns this
- Defined in src/tests/builders/test-data-builders.ts:336

withDimensions

withDimensions(dims: number): this
Set the number of spatial dimensions.
Parameters
- dims: number
Returns this
- Defined in src/tests/builders/test-data-builders.ts:342

withCenters

withCenters(centers: number[] | Float32Array<ArrayBufferLike>): this
Provide explicit centers. Layout: numSplats * dimensions floats.
Parameters
- centers: number[] | Float32Array<ArrayBufferLike>
Returns this
- Defined in src/tests/builders/test-data-builders.ts:348

withRandomCenters

withRandomCenters(range?: [number, number]): this
Generate random centers within range.
Parameters
- range: [number, number] = ...
Returns this
- Defined in src/tests/builders/test-data-builders.ts:354

withAmplitudes

withAmplitudes(value: number): this
Uniform amplitudes (required attribute).
Parameters
- value: number
Returns this
- Defined in src/tests/builders/test-data-builders.ts:365

withVaryingAmplitudes

withVaryingAmplitudes(min?: number, max?: number): this
Varying amplitudes.
Parameters
- min: number = 0.1
- max: number = 1.0
Returns this
- Defined in src/tests/builders/test-data-builders.ts:371

withIsotropicCovariance

withIsotropicCovariance(sigma?: number): this
Set isotropic Gaussian covariance via a single sigma. The Cholesky factor for an isotropic Gaussian is sigma * I, so the lower-triangular packing is sigma on the diagonals and zero elsewhere.

Packing (ndim=3): [L00, L10, L11, L20, L21, L22] → [sigma, 0, sigma, 0, 0, sigma].
Parameters
- sigma: number = 0.1
Returns this
- Defined in src/tests/builders/test-data-builders.ts:387

withCholeskyFactors

withCholeskyFactors(factors: number[] | Float32Array<ArrayBufferLike>): this
Provide explicit Cholesky factors (numSplats * ndim*(ndim+1)/2 floats).
Parameters
- factors: number[] | Float32Array<ArrayBufferLike>
Returns this
- Defined in src/tests/builders/test-data-builders.ts:404

withColors

withColors(colors?: number[] | Float32Array<ArrayBufferLike>): this
Per-splat RGB colors. Random when no values are passed.
Parameters
- Optionalcolors: number[] | Float32Array<ArrayBufferLike>
Returns this
- Defined in src/tests/builders/test-data-builders.ts:410

build

build(): {
    centers: Float32Array;
    amplitudes: Float32Array;
    choleskyFactors: Float32Array;
    colors: Float32Array<ArrayBufferLike>
    | null;
    numSplats: number;
    dimensions: number;
}
Build the test fixture. centers is auto-populated with random values if unset; amplitudes defaults to 1.0; choleskyFactors defaults to isotropic sigma=0.1 if unset (all three are required attributes).

Returns {
    centers: Float32Array;
    amplitudes: Float32Array;
    choleskyFactors: Float32Array;
    colors: Float32Array<ArrayBufferLike> | null;
    numSplats: number;
    dimensions: number;
}
- Defined in src/tests/builders/test-data-builders.ts:427

Class GSplatsBuilder

Example

Index

Constructors

Properties

Methods

Constructors

constructor

Returns GSplatsBuilder

Properties

PrivatenumSplats

Privatedimensions

Privatecenters

Privateamplitudes

PrivatecholeskyFactors

Privatecolors

Methods

withSplats

Parameters

Returns this

withDimensions

Parameters

Returns this

withCenters

Parameters

Returns this

withRandomCenters

Parameters

Returns this

withAmplitudes

Parameters

Returns this

withVaryingAmplitudes

Parameters

Returns this

withIsotropicCovariance

Parameters

Returns this

withCholeskyFactors

Parameters

Returns this

withColors

Parameters

Returns this

build

Returns { centers: Float32Array; amplitudes: Float32Array; choleskyFactors: Float32Array; colors: Float32Array<ArrayBufferLike> | null; numSplats: number; dimensions: number;}

Settings

On This Page

`Private`numSplats

`Private`dimensions

`Private`centers

`Private`amplitudes

`Private`choleskyFactors

`Private`colors

Returns {
centers: Float32Array;
amplitudes: Float32Array;
choleskyFactors: Float32Array;
colors: Float32Array<ArrayBufferLike> | null;
numSplats: number;
dimensions: number;
}