import { vec2 } from "gl-matrix";
import Shape from "./shape";
/**
 * Represents a triangle in 2D space with a width and height.
 */
export default class Triangle extends Shape {
    private height;
    private width;
    /**
     * Creates a new {@link Triangle} instance with dimensions, position and rotation.
     *
     * @param width The width of the triangle (x size)
     * @param height The height of the triangle (y size)
     * @param position The triangle's position in world space, default is [0, 0]
     * @param rotation The triangle's rotation, default is 0.
     */
    constructor(width: number, height: number, position?: vec2, rotation?: number);
    /**
     * Calculates the triangle'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 triangle's vertices relative to the provided origin in world space
     */
    getVerticesWorld(origin: vec2, rotation?: number, returnVecs?: boolean): number[] | vec2[];
    /**
     * Calculates the base vertices of the triangle.
     *
     * These are the vertices for a triangle scaled to the width and height of the {@link Triangle} instance.
     *
     * @returns The triangles base vertices
     */
    getBaseVertices(): vec2[];
    /**
     * Gets the triangle's vertex indices for drawing using element arrays.
     *
     * @param offset An offset to apply to each index
     * @returns The triangle's vertex indices with the given offset added to each index
     */
    getIndices(offset?: number): Uint16Array;
    /**
     * Calculates the triangles's UV coords to be used for texture rendering.
     *
     * @returns the triangle's UV coords
     */
    getUVCoords(): Float32Array;
    /**
     * Sets the triangle's width.
     *
     * @throws When the the provided width is < 0
     *
     * @param width The triangle's new width
     */
    setWidth(width: number): void;
    /**
     * Gets the triangle's width in world space units.
     *
     * @returns The triangle's width in world space
     */
    getWidth(): number;
    /**
     * Sets the triangle's height.
     *
     * @throws When the the provided height is < 0
     *
     * @param height The triangle's new height
     */
    setHeight(height: number): void;
    /**
     * Gets the triangle's height in world space units.
     *
     * @returns The triangle's height in world space
     */
    getHeight(): number;
}