Check if hierarchy has been built */

Clear all hierarchy data */

Get GPU resources (may return nullptr if pending destruction) */

Get number of SH bands stored in SHBuffer (0 = no SH data) */

Compute WorldToPLY matrix for SH evaluation SH coefficients are stored in PLY space, so we need to transform view direction from world to PLY space Th

Expand AABB to include a point */

Calculate bounding sphere from AABB */

Encode a linear scale value to uint8 using log encoding */

Pack a float to 16-bit half float representation */

Check if this is a leaf cluster (no children) */

Normalize quaternion */

Initialize bounds to inverse extremes (ready for expansion) */

Helper: Set pixel shader velocity parameters using self-tracked previous frame data. UE5's PrevViewInfo is not populated for PostOpaqueRender callback

Get rendering parameters */

Unpack 16-bit half float to float */

Whether CPU-side data has been initialized */

Check if resources are valid */

Convert SH DC component to base color */

Convert splat index to pixel coordinates in color texture (Morton-swizzled) */

Calculate bounding box from vertex data. Args: vertices: Vertex data array trim_percentile: If > 0, use percentile bounds instead

Print information about the PLY file and tile grid.

Decode Morton code to 2D coordinate (16x16 tile) */

* Encode 3D position to Morton code (Z-order curve) for spatial locality * Used during cluster building to group spatially-close splats */

Encode quaternion to octahedral axis-angle representation (3 bytes: U, V, Angle) */

Check if this proxy is safe to use for rendering. * Returns false if proxy is being destroyed or has invalid resources. * Thread-safe - can be c

Pack two half floats into a uint32 */

* Pack a single splat into 4 uint32 words (16 bytes total). * Layout matches SparkJS PackedSplats format. * @param Position UE centimeter coordina

Apply sigmoid function: 1 / (1 + exp(-x)) */

Convert to GPU-friendly format */

Assign each point to a tile based on XY position.

Calculate the tile grid parameters.

Create a new PlyData object for a tile with selected vertices.

Load PLY file and return PlyData object.

Save each tile as a separate PLY file.

Whether GPU buffers have been created */

* Calculate screen-space projected error in pixels * Used for LOD selection at runtime */