import type { Matrix4 } from "./Matrix4.ts";
import { Vector2 } from "./Vector2.ts";
/** 3x3 matrix for 2D transforms and normal matrices. */
export declare class Matrix3 {
    #private;
    constructor(elements?: Float32Array<ArrayBufferLike>);
    get elements(): Float32Array;
    clone(): Matrix3;
    /**
     * Composes this matrix from a 2D position, rotation angle, and scale.
     * @param rotation Angle in radians
     */
    compose(position: Vector2, rotation: number, scale: Vector2): this;
    /** Copies elements from another Matrix3 into this one. */
    copy(m: Matrix3): this;
    /** Decomposes this matrix into position, rotation, and scale components. */
    decompose(position: Vector2, rotation: {
        angle: number;
    }, scale: Vector2): this;
    /** Computes the determinant of this matrix. */
    determinant(): number;
    /** Extracts the translation component into the given Vector2. */
    extractPosition(position: Vector2): this;
    /** Extracts the rotation component from another Matrix3, normalizing by scale. */
    extractRotation(m: Matrix3): this;
    /** Extracts the scale component into the given Vector2. */
    extractScale(scale: Vector2): this;
    /** Sets this to the normal matrix derived from the given Matrix4. */
    getNormalMatrix(m: Matrix4): this;
    /** Resets this matrix to the identity. */
    identity(): this;
    /**
     * Inverts this matrix in place.
     * @throws When the matrix is non-invertible (det === 0)
     */
    invert(): this;
    /** Sets this to a 2D rotation matrix. */
    makeRotation(radians: number): this;
    /** Sets this to a 2D scale matrix. */
    makeScale(x: number, y: number): this;
    /** Sets this to a 2D translation matrix. */
    makeTranslation(x: number, y: number): this;
    /** Post-multiplies this matrix by m. */
    mul(m: Matrix3): this;
    /** Sets this matrix to the product a * b. */
    mulMatrices(a: Matrix3, b: Matrix3): this;
    /** Sets all nine elements directly (row-major argument order). */
    set(n11: number, n12: number, n13: number, n21: number, n22: number, n23: number, n31: number, n32: number, n33: number): this;
    /** Sets this matrix from the upper-left 3x3 of a Matrix4. */
    setFromMatrix4(m: Matrix4): this;
    /** Transposes this matrix in place. */
    transpose(): this;
    /** Iterates over all nine elements in column-major order. */
    [Symbol.iterator](): Generator<number>;
}
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