Function compute_joint_codes

compute_joint_codes(
    segments: Uint32Array,
    visibility: Uint8Array,
    t1Params: Float32Array,
    t2Params: Float32Array,
    numSegments: number,
    numVertices: number,
    outputStart: Float32Array,
    outputEnd: Float32Array,
): number

Per-endpoint joint code (drives the shader's join geometry and cap).

TypeScript reference for the Rust compute_joint_codes kernel — see the Rust doc comment in wasm/rust/src/lines_clipping.rs for the full rationale. This mirror is not just a WASM-missing fallback: it is the production backend for ndim > 16, which the fixed-size Rust kernels cannot serve, so the two must agree exactly.

Agreement is trivial here in a way it was not for the scalar this replaced: the output is integer index arithmetic, so there is no f32/f64 accumulation order to reconcile between the backends.

value	meaning
`0`	free polyline end — keep the soft cap
`-1`	slice-clipped — suppress the cap entirely
`-2`	degree->=3 hub — keep the cap
`+(slot + 1)`	joins visible segment `slot`, at that segment's START
`-(slot + 3)`	joins visible segment `slot`, at that segment's END

slot is a storage slot in the line texture, so it survives the depth-sort worker's draw-order permutation without adjustment.

Parameters

segments: Uint32Array
Vertex index pairs [numSegments * 2]
visibility: Uint8Array
Visibility mask [numSegments]
t1Params: Float32Array
Start interpolation parameters [numSegments]
t2Params: Float32Array
End interpolation parameters [numSegments]
numSegments: number
Total number of segments
numVertices: number
Total number of source vertices (bounds the touch tables)
outputStart: Float32Array
Output start joint codes [visibleCount]
outputEnd: Float32Array
Output end joint codes [visibleCount]

Returns number

Number of visible segments written

Function compute_joint_codes

Parameters

Returns number

Settings