import { vec2 } from "gl-matrix";
import Camera from "../camera/camera";
import Object2D from "../object2d";
import Texture from "../texture/texture";
/**
 * Represents an arbitrary shape in 2D world space.
 *
 * A shape is self contained and includes functions to render itself.
 */
export default abstract class Shape extends Object2D {
    texture: Texture;
    constructor();
    /**
     * Renders the shape using the {@link Renderer}.
     *
     * @param position The x and y position to render the shape at
     * @param rotation The rotation to apply to the rendered shape
     * @param zIndex The z position of the rendered shape
     */
    render(position?: vec2, rotation?: number, zIndex?: number): void;
    /**
     * Calculates the shape's UV coords to be used for texture rendering.
     *
     * @returns the shape's UV coords
     */
    abstract getUVCoords(): Float32Array;
    /**
     * Calculates the shape's vertices in local space.
     *
     * @returns The shape's vertices
     */
    getVertices(): number[];
    /**
     * Calculates the shape's vertices relative to the provided origin in world space.
     *
     * @param origin The origin to calculate the vertices relative to, should be a world position
     * @param rotation An optional world space rotation to apply to the vertices
     * @param returnVecs Wether or not to return the vertices as vec2s or raw numbers
     * @returns The shape's vertices relative to the provided origin in world space
     */
    abstract getVerticesWorld(origin: vec2, rotation?: number, returnVecs?: boolean): number[] | vec2[];
    /**
     * Calculates the shape's vertices relative to the provided origin in world space.
     *
     * @param origin The origin to calculate the vertices relative to, should be a world position
     * @param scale The vector to scale the world space vertices by to obtain clip space values
     * @param rotation An optional rotation to apply to the vertices
     * @param camera An optional camera to get vertices relative to
     * @returns The shape's vertices relative to the provided origin in clip space
     */
    getVerticesClipSpace(origin: vec2, scale: vec2, rotation?: number, camera?: Camera): number[];
    /**
     * Calculates the base vertices of the shape.
     *
     * These are the vertices for the type of shape at unit size, scaled to the shape's dimensions.
     *
     * @returns The shape's vertices
     */
    abstract getBaseVertices(): vec2[];
    /**
     * Gets the shape's vertex indices for drawing using element arrays.
     *
     * @param offset An offset to apply to each index
     * @returns The shape's vertex indices with the given offset added to each index
     */
    abstract getIndices(offset?: number): Uint16Array;
    private cachedPoints;
    private posDiff;
    /**
     * Calculates the bounding points of the {@link Shape} instance.
     *
     * **NOTE: The shape's vertices are recalculated every time this function is called.**
     *
     * @returns The bounding points of the box
     */
    getPoints(): vec2[];
}