/**
 * Native character motion vectors for temporal reprojection.
 *
 * The CPU stage evaluates the exact dual-influence skinning contract used by
 * skin-skinning.wgsl for both the previous and current CharacterDrawSpec. The
 * GPU stage rasterizes those per-vertex vectors with the character index
 * buffer, producing screen-space velocity and depth grids for temporal resolve.
 */
import type { CharacterDrawSpec } from '../native-render/draw-spec';
import type { DepthGrid, MotionVectorGrid } from '../rendering/webgpu/TemporalInputs';
import { type Mat4 } from './skin-math';
export interface CharacterMotionVectorOptions {
    width: number;
    height: number;
    currentViewProjection: Mat4;
    previousViewProjection?: Mat4;
}
export interface CharacterMotionVectorReceipt {
    schemaVersion: 'holoscript.character-motion-vectors.v1';
    entityId: string;
    vertexCount: number;
    movingVertexCount: number;
    invalidVertexCount: number;
    meanMagnitudePixels: number;
    maximumMagnitudePixels: number;
    motionVectorSpace: 'current-minus-previous-pixels';
    dualInfluenceSkinningConsumed: true;
    modelMotionConsumed: true;
    viewProjectionMotionConsumed: true;
    topologyIdentityRequired: true;
    currentClipDigest: string;
    previousClipDigest: string;
    motionDigest: string;
}
export interface CharacterMotionVectorFrame {
    schemaVersion: 'holoscript.character-motion-vector-frame.v1';
    width: number;
    height: number;
    vertexCount: number;
    currentClipPositions: Float32Array<ArrayBuffer>;
    previousClipPositions: Float32Array<ArrayBuffer>;
    currentDepth: Float32Array<ArrayBuffer>;
    motionPixels: Float32Array<ArrayBuffer>;
    receipt: CharacterMotionVectorReceipt;
}
export interface CharacterMotionRasterReceipt {
    schemaVersion: 'holoscript.webgpu-character-motion-raster.v1';
    backend: 'webgpu';
    deviceExecutionMeasured: true;
    width: number;
    height: number;
    vertexCount: number;
    triangleCount: number;
    rasterizedPixelCount: number;
    movingPixelCount: number;
    motionVectorSpace: 'current-minus-previous-pixels';
    depthConvention: 'webgpu-ndc-zero-to-one';
    gpuTimestampMeasured: false;
    timingClassification: 'not-measured';
}
export interface CharacterMotionRasterResult {
    motionVectors: MotionVectorGrid;
    depth: DepthGrid;
    receipt: CharacterMotionRasterReceipt;
}
/**
 * Derive current/previous clip positions and current-minus-previous pixel
 * velocity from two topology-identical character frames.
 */
export declare function deriveCharacterMotionVectorFrame(current: CharacterDrawSpec, previous: CharacterDrawSpec, options: CharacterMotionVectorOptions): CharacterMotionVectorFrame;
/**
 * Rasterize a character motion frame into screen-space velocity and NDC depth
 * on a live GPUDevice. Readback proves execution but is not a GPU timing result.
 */
export declare function rasterizeCharacterMotionVectorsGPU(device: GPUDevice, frame: CharacterMotionVectorFrame, indices: Uint32Array<ArrayBuffer>): Promise<CharacterMotionRasterResult>;
//# sourceMappingURL=CharacterMotionVectors.d.ts.map