checkBufferGeometryIntersection function

Intersection? checkBufferGeometryIntersection(Object3D object, Material material, Raycaster raycaster, Ray ray, BufferAttribute<NativeArray<num>> position, dynamic morphPosition, dynamic morphTargetsRelative, dynamic uv, dynamic uv2, int a, int b, int c,)

Implementation

Intersection? checkBufferGeometryIntersection(Object3D object, Material material, Raycaster raycaster, Ray ray,
    BufferAttribute position, morphPosition, morphTargetsRelative, uv, uv2, int a, int b, int c) {
  _vA.fromBufferAttribute(position, a);
  _vB.fromBufferAttribute(position, b);
  _vC.fromBufferAttribute(position, c);

  var morphInfluences = object.morphTargetInfluences;

  if (morphPosition != null && morphInfluences != null) {
    _morphA.set(0, 0, 0);
    _morphB.set(0, 0, 0);
    _morphC.set(0, 0, 0);

    for (var i = 0, il = morphPosition.length; i < il; i++) {
      var influence = morphInfluences[i];
      var morphAttribute = morphPosition[i];

      if (influence == 0) continue;

      _tempA.fromBufferAttribute(morphAttribute, a);
      _tempB.fromBufferAttribute(morphAttribute, b);
      _tempC.fromBufferAttribute(morphAttribute, c);

      if (morphTargetsRelative) {
        _morphA.addScaledVector(_tempA, influence);
        _morphB.addScaledVector(_tempB, influence);
        _morphC.addScaledVector(_tempC, influence);
      } else {
        _morphA.addScaledVector(_tempA.sub(_vA), influence);
        _morphB.addScaledVector(_tempB.sub(_vB), influence);
        _morphC.addScaledVector(_tempC.sub(_vC), influence);
      }
    }

    _vA.add(_morphA);
    _vB.add(_morphB);
    _vC.add(_morphC);
  }

  if (object is SkinnedMesh) {
    object.boneTransform(a, _vA);
    object.boneTransform(b, _vB);
    object.boneTransform(c, _vC);
  }

  var intersection = checkIntersection(object, material, raycaster, ray, _vA, _vB, _vC, _intersectionPoint);

  if (intersection != null) {
    if (uv != null) {
      _uvA.fromBufferAttribute(uv, a);
      _uvB.fromBufferAttribute(uv, b);
      _uvC.fromBufferAttribute(uv, c);

      intersection.uv = Triangle.staticGetUV(_intersectionPoint, _vA, _vB, _vC, _uvA, _uvB, _uvC, Vector2(null, null));
    }

    if (uv2 != null) {
      _uvA.fromBufferAttribute(uv2, a);
      _uvB.fromBufferAttribute(uv2, b);
      _uvC.fromBufferAttribute(uv2, c);

      intersection.uv2 = Triangle.staticGetUV(_intersectionPoint, _vA, _vB, _vC, _uvA, _uvB, _uvC, Vector2(null, null));
    }

    var face = Face.fromJSON({"a": a, "b": b, "c": c, "normal": Vector3.init(), "materialIndex": 0});

    Triangle.staticGetNormal(_vA, _vB, _vC, face.normal);

    intersection.face = face;
  }

  return intersection;
}