/**
 * Brush Stroke Processing
 *
 * Handles brush stroke interpolation, line drawing, and stroke smoothing.
 * This ensures smooth painting even with fast mouse movements.
 */
import { UVPaintCoordinates } from './uv_raycasting';
import { PaintStrokeOptions } from './uv_painting';
export interface BrushStrokePoint {
    x: number;
    y: number;
    pressure?: number;
    tilt?: number;
}
/**
 * Draw brush line between two points
 * Interpolates between start and end to ensure smooth strokes
 */
export declare function drawBrushLine(start: BrushStrokePoint, end: BrushStrokePoint, coords: UVPaintCoordinates, options: PaintStrokeOptions): void;
/**
 * Smooth brush stroke
 * Applies smoothing to reduce jitter in fast strokes
 */
export declare function smoothBrushStroke(points: BrushStrokePoint[], smoothing?: number): BrushStrokePoint[];
/**
 * Process brush stroke with interpolation
 */
export declare function processBrushStroke(points: BrushStrokePoint[], coords: UVPaintCoordinates, options: PaintStrokeOptions): void;
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