/**
 * A frustum is a shape that defines the viewing space of a camera. It can be used to determine
 * visibility of points and bounding spheres. Typically, you would not create a Frustum shape
 * directly, but instead query {@link CameraComponent#frustum}.
 *
 * @category Math
 */
export class Frustum {
    planes: any[];
    /**
     * Updates the frustum shape based on the supplied 4x4 matrix.
     *
     * @param {import('../math/mat4.js').Mat4} matrix - The matrix describing the shape of the
     * frustum.
     * @example
     * // Create a perspective projection matrix
     * const projMat = pc.Mat4();
     * projMat.setPerspective(45, 16 / 9, 1, 1000);
     *
     * // Create a frustum shape that is represented by the matrix
     * const frustum = new pc.Frustum();
     * frustum.setFromMat4(projMat);
     */
    setFromMat4(matrix: import("../math/mat4.js").Mat4): void;
    /**
     * Tests whether a point is inside the frustum. Note that points lying in a frustum plane are
     * considered to be outside the frustum.
     *
     * @param {import('../math/vec3.js').Vec3} point - The point to test.
     * @returns {boolean} True if the point is inside the frustum, false otherwise.
     */
    containsPoint(point: import("../math/vec3.js").Vec3): boolean;
    /**
     * Tests whether a bounding sphere intersects the frustum. If the sphere is outside the
     * frustum, zero is returned. If the sphere intersects the frustum, 1 is returned. If the
     * sphere is completely inside the frustum, 2 is returned. Note that a sphere touching a
     * frustum plane from the outside is considered to be outside the frustum.
     *
     * @param {import('./bounding-sphere.js').BoundingSphere} sphere - The sphere to test.
     * @returns {number} 0 if the bounding sphere is outside the frustum, 1 if it intersects the
     * frustum and 2 if it is contained by the frustum.
     */
    containsSphere(sphere: import("./bounding-sphere.js").BoundingSphere): number;
}