@awayjs/renderer/dist/lib/utils/ConvexHullUtils.d.ts

Renderer for AwayJS

import { Box, Matrix3D } from '@awayjs/core';
import { AttributesView, Short2Attributes } from '@awayjs/stage';
export type TPoint = [number, number];
export type TEdge = {
    a: number;
    b: number;
    angle: number;
};
export interface IHullData {
    middle: TPoint;
    points: Array<TPoint>;
    edges: Array<TEdge>;
}
export interface IHullImpl extends IHullData {
    fetchEdge(angle: number): TEdge;
    fetchPoint(index: number): TPoint;
    dispose(): void;
}
export declare class ConvexHull implements IHullImpl {
    middle: TPoint;
    points: TPoint[];
    edges: TEdge[];
    ranges: Array<{
        from: number;
        to: number;
    }>;
    constructor(obj: IHullData);
    private _constructRanges;
    fetchEdge(angle: number): TEdge;
    fetchPoint(index: number): TPoint;
    dispose(): void;
}
export declare class ConvexHullUtils {
    private static ccw;
    private static cmpPoints;
    private static cmpEdges;
    static EPS: number;
    static nearest(x0: number, y0: number, x1: number, y1: number): boolean;
    /**
     * @description Generate a hull by modified Graham scan, not required sorting by angle
     * @see https://en.wikibooks.org/wiki/Algorithm_Implementation/Geometry/Convex_hull/Monotone_chain
     */
    private static generateHull;
    static fromBuffer(buffer: Float32Array, dimension?: number): IHullImpl | null;
    static fromAttribute(posAttrs: AttributesView, indexAttrs: Short2Attributes, step: number, count: number, offset?: number): IHullImpl | null;
    static createBox(simpleHull: IHullData, matrix?: Matrix3D, target?: Box, cache?: Box): Box;
}
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