/**
 * primitive-mesh — CPU geometry generation for the native render path (D.083, task 2h3s, Inc 1).
 *
 * The pre-mortem confirmed the engine has NO primitive→mesh generator. This is that piece:
 * pure CPU math (positions + indices), zero GPU, zero foreign-engine deps — fully
 * headless-unit-testable. The GPU backend uploads these to GPUBuffers; this module never
 * touches a device. Centered at the origin; unit extents (cube/plane = ±0.5, sphere r=0.5).
 */
import type { GeometryKind } from './draw-spec';
export interface PrimitiveMesh {
    /** Interleaved is avoided for clarity: flat XYZ positions, 3 floats per vertex. */
    positions: Float32Array<ArrayBuffer>;
    indices: Uint32Array<ArrayBuffer>;
    vertexCount: number;
}
/**
 * Generate a primitive mesh for a geometry kind. Unsupported/unknown kinds fall back to a
 * cube (a visible placeholder is better than a missing draw — and it's logged-by-shape via
 * the returned kind in DrawSpec). `mesh` (asset geometry) is NOT handled here — it loads
 * externally; callers must branch on kind === 'mesh' before calling this.
 */
export declare function primitiveToMesh(kind: GeometryKind, params?: Record<string, number>): PrimitiveMesh;
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