/**
 * SVG Arc to Center Parameterization
 *
 * Converts SVG arc endpoint parameters to center point format used by KiCad.
 * Based on SVG specification: https://www.w3.org/TR/SVG/implnote.html#ArcConversionEndpointToCenter
 */
export interface ArcEndpointParams {
    x1: number;
    y1: number;
    rx: number;
    ry: number;
    phi: number;
    largeArc: boolean;
    sweep: boolean;
    x2: number;
    y2: number;
}
export interface ArcCenterParams {
    cx: number;
    cy: number;
    rx: number;
    ry: number;
    startAngle: number;
    endAngle: number;
    deltaAngle: number;
}
/**
 * Convert SVG arc endpoint parameterization to center parameterization
 * Algorithm from SVG spec Appendix B.2.4
 */
export declare function svgArcToCenter(params: ArcEndpointParams): ArcCenterParams | null;
/**
 * Parse SVG arc path and extract parameters
 * Format: "M x1 y1 A rx ry rotation largeArc sweep x2 y2"
 */
export declare function parseSvgArcPath(path: string): ArcEndpointParams | null;
/**
 * Convert radians to degrees
 */
export declare function radToDeg(rad: number): number;
/**
 * Normalize angle to 0-360 range
 */
export declare function normalizeAngle(degrees: number): number;
/**
 * Point type for arc interpolation
 */
export interface Point {
    x: number;
    y: number;
}
/**
 * Interpolate points along an SVG arc
 * Used for converting arc curves to polygon vertices in SOLIDREGION paths
 *
 * @param params Arc endpoint parameters from SVG path
 * @param segmentsPerQuarter Number of points per 90 degrees of arc (default: 4)
 * @returns Array of points along the arc (excluding start point, including end point)
 */
export declare function interpolateArc(params: ArcEndpointParams, segmentsPerQuarter?: number): Point[];
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