Struct CorePackBuilder 

pub struct CorePackBuilder { /* private fields */ }

Incrementally assembles an OHPK v1 core pack in memory.

Nothing touches the filesystem; the whole pack is produced as a Vec<u8> from build, making the builder usable on wasm32 as well.

Implementations

impl CorePackBuilder

pub fn new() -> Self

Create an empty builder.

pub fn set_base_mesh( &mut self, positions: &[f32], indices: &[u32], uvs: Option<&[f32]>, ) -> &mut Self

Set the base mesh.

• positions — flat x, y, z triples (length must be a multiple of 3).
• indices — triangle indices (stored raw as u32).
• uvs — optional flat u, v pairs; when present its length must be exactly 2 * n_verts.

Length validation happens in build.

pub fn set_helper_metadata(&mut self, bytes: &[u8]) -> &mut Self

Attach opaque vertex-group / helper metadata for future use.

pub fn add_target( &mut self, name: impl Into<String>, category: impl Into<String>, sparse: &[(u32, [f32; 3])], ) -> &mut Self

Add a sparse morph target.

sparse is a list of (vertex_index, [dx, dy, dz]) in model units. Entries may be supplied in any order — they are sorted by index at encode time.

pub fn set_manifest(&mut self, manifest: CorePackManifest) -> &mut Self

Replace the pack manifest.

pub fn build(&self) -> Result<Vec<u8>>

Serialise the pack to OHPK v1 bytes.

Fails when no base mesh has been set, when buffer lengths are inconsistent, or when compression fails.

Trait Implementations

impl Default for CorePackBuilder

fn default() -> Self

Returns the “default value” for a type.