let _geometry;

const _intersectPoint = /*@__PURE__*/ new Vector3();
const _worldScale = /*@__PURE__*/ new Vector3();
const _mvPosition = /*@__PURE__*/ new Vector3();

const _alignedPosition = /*@__PURE__*/ new Vector2();
const _rotatedPosition = /*@__PURE__*/ new Vector2();
const _viewWorldMatrix = /*@__PURE__*/ new Matrix4();

const _vA = /*@__PURE__*/ new Vector3();
const _vB = /*@__PURE__*/ new Vector3();
const _vC = /*@__PURE__*/ new Vector3();

const _uvA = /*@__PURE__*/ new Vector2();
const _uvB = /*@__PURE__*/ new Vector2();
const _uvC = /*@__PURE__*/ new Vector2();

class Sprite extends Object3D {
    constructor(material = new SpriteMaterial()) {
        super();

        this.isSprite = true;

        this.type = "Sprite";

        if (_geometry === undefined) {
            _geometry = new BufferGeometry();

            const float32Array = new Float32Array([
                -0.5, -0.5, 0, 0, 0, 0.5, -0.5, 0, 1, 0, 0.5, 0.5, 0, 1, 1,
                -0.5, 0.5, 0, 0, 1,
            ]);

            const interleavedBuffer = new InterleavedBuffer(float32Array, 5);

            _geometry.setIndex([0, 1, 2, 0, 2, 3]);
            _geometry.setAttribute(
                "position",
                new InterleavedBufferAttribute(interleavedBuffer, 3, 0, false)
            );
            _geometry.setAttribute(
                "uv",
                new InterleavedBufferAttribute(interleavedBuffer, 2, 3, false)
            );
        }

        this.geometry = _geometry;
        this.material = material;

        this.center = new Vector2(0.5, 0.5);
    }

    raycast(raycaster, intersects) {
        if (raycaster.camera === null) {
            console.error(
                'THREE.Sprite: "Raycaster.camera" needs to be set in order to raycast against sprites.'
            );
        }

        _worldScale.setFromMatrixScale(this.matrixWorld);

        _viewWorldMatrix.copy(raycaster.camera.matrixWorld);
        this.modelViewMatrix.multiplyMatrices(
            raycaster.camera.matrixWorldInverse,
            this.matrixWorld
        );

        _mvPosition.setFromMatrixPosition(this.modelViewMatrix);

        if (
            raycaster.camera.isPerspectiveCamera &&
            this.material.sizeAttenuation === false
        ) {
            _worldScale.multiplyScalar(-_mvPosition.z);
        }

        const rotation = this.material.rotation;
        let sin, cos;

        if (rotation !== 0) {
            cos = Math.cos(rotation);
            sin = Math.sin(rotation);
        }

        const center = this.center;

        transformVertex(
            _vA.set(-0.5, -0.5, 0),
            _mvPosition,
            center,
            _worldScale,
            sin,
            cos
        );
        transformVertex(
            _vB.set(0.5, -0.5, 0),
            _mvPosition,
            center,
            _worldScale,
            sin,
            cos
        );
        transformVertex(
            _vC.set(0.5, 0.5, 0),
            _mvPosition,
            center,
            _worldScale,
            sin,
            cos
        );

        _uvA.set(0, 0);
        _uvB.set(1, 0);
        _uvC.set(1, 1);

        // check first triangle
        let intersect = raycaster.ray.intersectTriangle(
            _vA,
            _vB,
            _vC,
            false,
            _intersectPoint
        );

        if (intersect === null) {
            // check second triangle
            transformVertex(
                _vB.set(-0.5, 0.5, 0),
                _mvPosition,
                center,
                _worldScale,
                sin,
                cos
            );
            _uvB.set(0, 1);

            intersect = raycaster.ray.intersectTriangle(
                _vA,
                _vC,
                _vB,
                false,
                _intersectPoint
            );
            if (intersect === null) {
                return;
            }
        }

        const distance = raycaster.ray.origin.distanceTo(_intersectPoint);

        if (distance < raycaster.near || distance > raycaster.far) return;

        intersects.push({
            distance: distance,
            point: _intersectPoint.clone(),
            uv: Triangle.getInterpolation(
                _intersectPoint,
                _vA,
                _vB,
                _vC,
                _uvA,
                _uvB,
                _uvC,
                new Vector2()
            ),
            face: null,
            object: this,
        });
    }

    copy(source, recursive) {
        super.copy(source, recursive);

        if (source.center !== undefined) this.center.copy(source.center);

        this.material = source.material;

        return this;
    }
}

function transformVertex(vertexPosition, mvPosition, center, scale, sin, cos) {
    // compute position in camera space
    _alignedPosition
        .subVectors(vertexPosition, center)
        .addScalar(0.5)
        .multiply(scale);

    // to check if rotation is not zero
    if (sin !== undefined) {
        _rotatedPosition.x =
            cos * _alignedPosition.x - sin * _alignedPosition.y;
        _rotatedPosition.y =
            sin * _alignedPosition.x + cos * _alignedPosition.y;
    } else {
        _rotatedPosition.copy(_alignedPosition);
    }

    vertexPosition.copy(mvPosition);
    vertexPosition.x += _rotatedPosition.x;
    vertexPosition.y += _rotatedPosition.y;

    // transform to world space
    vertexPosition.applyMatrix4(_viewWorldMatrix);
}

export { Sprite };