/**
 * BCF 3D Overlay Renderer — pure DOM, no framework dependency.
 *
 * Renders BCFMarker3D items as positioned HTML elements overlaid on a 3D
 * canvas. Works with any renderer that implements BCFOverlayProjection.
 *
 * Features:
 *   - Markers anchored to 3D objects — track correctly during orbit/pan/zoom
 *   - Color-coded by priority / status
 *   - Click, hover callbacks
 *   - Continuous re-projection every frame via onCameraChange
 *   - Connector lines from marker to projected anchor point
 *   - Depth-based scaling (farther markers appear smaller)
 */
import type { BCFMarker3D, BCFOverlayProjection } from './overlay.js';
export interface BCFOverlayRendererOptions {
    /** Show connector lines from marker to 3D anchor (default true) */
    showConnectors?: boolean;
    /** Show tooltip on hover (default true) */
    showTooltips?: boolean;
    /** Minimum marker scale at far distance (default 0.65) */
    minScale?: number;
    /** Maximum marker scale at near distance (default 1.0) */
    maxScale?: number;
    /** Offset in pixels above the projected point (default 36) */
    verticalOffset?: number;
}
export declare class BCFOverlayRenderer {
    private container;
    private svgLayer;
    private markerElements;
    private connectorElements;
    private markers;
    private activeMarkerId;
    private projection;
    private unsubCamera;
    private clickCallbacks;
    private hoverCallbacks;
    private opts;
    private _visible;
    private _disposed;
    constructor(parentElement: HTMLElement, projection: BCFOverlayProjection, options?: BCFOverlayRendererOptions);
    /** Update the set of markers to display */
    setMarkers(markers: BCFMarker3D[]): void;
    /** Highlight a specific marker as active */
    setActiveMarker(topicGuid: string | null): void;
    /** Show/hide the entire overlay layer */
    setVisible(visible: boolean): void;
    /** Register click callback */
    onMarkerClick(callback: (topicGuid: string) => void): () => void;
    /** Register hover callback */
    onMarkerHover(callback: (topicGuid: string | null) => void): () => void;
    /**
     * Re-project all markers from world space to screen space.
     * Called directly from the camera-change polling RAF — no extra
     * scheduling, so markers track the camera with zero frame delay.
     */
    updatePositions(): void;
    /** Clean up all DOM elements and listeners */
    dispose(): void;
    private createMarkerElement;
    private updateMarkerContent;
    private updateMarkerInnerHTML;
    private getPriorityColor;
    private escapeHtml;
    private static stylesInjected;
    private injectStyles;
}
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